IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance improvement of mixed flow pump impeller through cfd analysiseSAT Journals
Abstract Centrifugal pumps are the largest used hydraulic machine. However, the performance of centrifugal pump is generally not very good. Making them more efficient is a major challenge. The performance of the centrifugal pump greatly depends on its geometrical parameters and the vane profile. Computation fluid dynamics (CFD) has been found to be very good tool for numerical analysis of flow through complex system including centrifugal pumps. The present study deals with the performance analysis of a mixed flow type centrifugal pump designed centrifugal pump to deliver 0.25 m3/s water at a head of 20 m running at 1450 rpm using ANSYS CFX 14.0 software. Modeling of the pump unit has been done using PTC Cre-o 2.0 software. The performance of the pump was first determined using the initially obtained vane angles. The inlet vane angle and outlet vane angle are then varied to analyses the improvement in pump performance .The results shows that for an initial inlet angle 20.08˚ and outlet angle 16.28˚, the efficiency of the pump is 83 %.however, for an optimized angles at inlet and outlet as 20.16˚ and 16.62˚ respectively, the efficiency of pump raised to 88 % thus showing an improvement in the performance of mixed flow pump. Keywords: Computation Fluid Dynamics Analysis, mixed flow pump, overall efficiency
Optimization of design of mixed flow centrifugal pump impeller using cfdeSAT Journals
Abstract
Centrifugal pumps are widely used hydraulic machines, irrespective of the fact that their performance is generally not very good. So, turning them into more efficient machines is quite a challenge. The performance of a centrifugal pump is highly dependent on its geometrical parameters and its vane profile. In order to analyze the flow through complex systems like centrifugal pumps, Computation fluid dynamics (CFD) has been used. This work aims to study the performance analysis of a centrifugal mixed flow pump designed to deliver 0.25 m3/s of water with a head of 20 m at a speed of 1450 rpm using ANSYS CFX (ver.14.0). PTC Creo (ver. 2.0) has been used to model the pump unit. The performance of the pump was first determined using the existing vane angles and thickness of the blade then, the inlet vane angle, the outlet vane angle along with the thickness of the blade has been varied to analyze the pump’s performance . The results show that for an initial inlet angle 21.08˚, outlet angle 16.28˚ and blade thickness as 10mm, the efficiency of the pump was 84%. However, the efficiency of pump rises to 89.19% for the optimized angles and blade thickness.
Cavitation Effects in Centrifugal Pumps- A ReviewIJERA Editor
Cavitation is one of the most challenging fluid flow abnormalities leading to detrimental effects on both the
centrifugal pump flow behaviors and physical characteristics. Centrifugal pumps’ most low pressure zones are the
first cavitation victims, where cavitation manifests itself in form of pitting on the pump internal solid walls,
accompanied by noise and vibration, all leading to the pump hydraulic performance degradation. In the present
article, a general description of centrifugal pump performance and related parameters is presented. Based on the
literature survey, some light were shed on fundamental cavitation features; where different aspects relating to
cavitation in centrifugal pumps were briefly discussed.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Performance improvement of mixed flow pump impeller through cfd analysiseSAT Journals
Abstract Centrifugal pumps are the largest used hydraulic machine. However, the performance of centrifugal pump is generally not very good. Making them more efficient is a major challenge. The performance of the centrifugal pump greatly depends on its geometrical parameters and the vane profile. Computation fluid dynamics (CFD) has been found to be very good tool for numerical analysis of flow through complex system including centrifugal pumps. The present study deals with the performance analysis of a mixed flow type centrifugal pump designed centrifugal pump to deliver 0.25 m3/s water at a head of 20 m running at 1450 rpm using ANSYS CFX 14.0 software. Modeling of the pump unit has been done using PTC Cre-o 2.0 software. The performance of the pump was first determined using the initially obtained vane angles. The inlet vane angle and outlet vane angle are then varied to analyses the improvement in pump performance .The results shows that for an initial inlet angle 20.08˚ and outlet angle 16.28˚, the efficiency of the pump is 83 %.however, for an optimized angles at inlet and outlet as 20.16˚ and 16.62˚ respectively, the efficiency of pump raised to 88 % thus showing an improvement in the performance of mixed flow pump. Keywords: Computation Fluid Dynamics Analysis, mixed flow pump, overall efficiency
Optimization of design of mixed flow centrifugal pump impeller using cfdeSAT Journals
Abstract
Centrifugal pumps are widely used hydraulic machines, irrespective of the fact that their performance is generally not very good. So, turning them into more efficient machines is quite a challenge. The performance of a centrifugal pump is highly dependent on its geometrical parameters and its vane profile. In order to analyze the flow through complex systems like centrifugal pumps, Computation fluid dynamics (CFD) has been used. This work aims to study the performance analysis of a centrifugal mixed flow pump designed to deliver 0.25 m3/s of water with a head of 20 m at a speed of 1450 rpm using ANSYS CFX (ver.14.0). PTC Creo (ver. 2.0) has been used to model the pump unit. The performance of the pump was first determined using the existing vane angles and thickness of the blade then, the inlet vane angle, the outlet vane angle along with the thickness of the blade has been varied to analyze the pump’s performance . The results show that for an initial inlet angle 21.08˚, outlet angle 16.28˚ and blade thickness as 10mm, the efficiency of the pump was 84%. However, the efficiency of pump rises to 89.19% for the optimized angles and blade thickness.
Cavitation Effects in Centrifugal Pumps- A ReviewIJERA Editor
Cavitation is one of the most challenging fluid flow abnormalities leading to detrimental effects on both the
centrifugal pump flow behaviors and physical characteristics. Centrifugal pumps’ most low pressure zones are the
first cavitation victims, where cavitation manifests itself in form of pitting on the pump internal solid walls,
accompanied by noise and vibration, all leading to the pump hydraulic performance degradation. In the present
article, a general description of centrifugal pump performance and related parameters is presented. Based on the
literature survey, some light were shed on fundamental cavitation features; where different aspects relating to
cavitation in centrifugal pumps were briefly discussed.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Thermal analysis of water cooled charge air cooler in turbo charged diesel en...eSAT Journals
Abstract
Air-cooled and water-cooled charge air coolers are used as applications in automobiles. The cooling media include engine’s
coolant, ambient air or any other external coolant source. Charge air cooler with offset strip fin geometry is chosen on both hot
and cold sides with fin thickness 0.15 mm, length 3.2 mm, height 5.2 mm and frequency of 18 fins per inch. The flow rate on hot
side is taken as 0.3 kg/s and cold side as 2 kg/s for air-cooled charge air cooler and for water-cooled charge air cooler on hot
side it is 0.3 kg/s and cold side is 0.265 kg/s with inlet temperature on hot side 160 oC and cold side 40 oC. With the above
conditions, performance evaluation is done on both charge air coolers. Having found water-cooled charge air cooler is having
higher effectiveness than air-cooled type, performance evaluation is carried out on water-cooled charge air cooler with varying
mass flow rates on hot side from 0.1 to 0.6 kg/s and keeping cold fluid rate constant at 0.265 kg/s and the outputs obtained are
Colburn-j factor, Fanning friction factor, heat transfer coefficient, overall heat transfer coefficient and effectiveness of heat
exchanger. From the obtained results, graphs are drawn to assess the performance of the water charge air cooler.
Keywords: Charge Air Cooler, Plate Fin Heat Exchanger, Colburn-J Factor, Heat Transfer Coefficient, Fanning
Friction Factor, Effectiveness
An approach to evaluate the heat exchanger retrofit for installed industrial ...eSAT Journals
Abstract This paper is the first part of a two-part study aiming to introduce a new integrated approach to evaluate the techno-economic value of recuperator retrofit on existing gas turbine engines. The original gas turbines are designed for combined cycles so that the pressure ratios are moderate to secure suitable exhaust temperatures. One way to enhance the thermal efficiency of some gas turbines is by using recuperation to recover some of the exhaust heat. In this part, the developed model is described and implemented for two gas turbine engines so the obtained characteristics are evaluated against the actual data. The new approach will assist users to select the suitable gas turbine models with favorable recuperator characteristics based on a technical and economic prospective. Besides, the performance results are used to design an appropriate shell and tube heat exchanger. Moreover, a new technique has been established to define the typical heat exchanger parameters in order to ensure the highest possible improvements over the original cycles. One of the main features of this method is that it depends only on the velocity of hot and cold heat exchanger streams from which the rest of the heat exchanger design and performance characteristics were derived. Key Words: integrated approach, techno-economic value, recuperation, shell and tube heat exchanger, velocity
A REVIEW ON IMPROVEMENT OF EFFICIENCY OF CENTRIFUGAL PUMP THROUGH MODIFICATIO...ijiert bestjournal
The paper reviews the literature available on the i mprovement of efficiency of centrifugal pump through modification in suction manifolds. The paper discusses the available material of performance improvement through various paramete rs and mainly focuses on the research related to manifold modifications.
DESIGN IMPROVEMENTS OF VARIABLE DISPLACEMENT PUMPS-A REVIEWijiert bestjournal
In Variable displacement pump the displacement or amount of fluid pumped per revolution of
pump‟s input shaft can be varied as per requirement. This paper investigate the different
improvements achieved for increase the efficiency of variable displacement pump .This paper
also discussed about the alternative mechanisms for variable displacement pump to improve
efficiency and cost reduction of pump.
EXPERIMENTAL STUDIES ON THE INTAKE PORT OF A DIESEL ENGINE TO DETERMINE SWIRLijmech
This paper focuses on experimentalstudies of intake port of a four cylinder diesel engine for different
vacuum pressures and valve lift positions. In this study, the cylinder head is experimented through a paddle
wheel flow setup, which gives the flow coefficient and swirl number asoutput. Main scope of the work is to
understand the flow behaviour through the intake port and finally to determine mean flow coefficient and
mean swirl number for different valve lift ratios L/D, where L is valve lift and D is bore diameter.
Design and Analysis of Air Intake System for Single Cylinder Engineijtsrd
Our understanding of Air flow behavior around an object makes us better designer in order to achieve better performances from our automobiles. In this paper we present an analysis of air flow via air-intake system required to meet FSAE norms in SUPRA Vehicles.The aim of this project is to create a flow restriction device to be fitted in the SAE (Society of Automotive Engineers) car being built by Team Zenith, GB Pant Engineering College, New Delhi. The car is an open wheeled race vehicle, designed to go from 0-60 mph in under 4 seconds and have a top speed of about 80-90 mph.An Air-intake system in a FSAE SUPRA Vehicle consists of various components as followed: -1) Air Filter2) Air Restrictor3) Plenum4) Intake Manifold.Air enters at the filter and passes through restrictor, which is used to increase velocity and drop pressure and then enters into plenum which is used to provide better distribution of air flow and to prevent further drop in pressure.Design of Air restrictor is critical as per norms of FSAE due to fixed minimum neck diameter of 20 mm as demonstrated below. Fig: - Basic structure of restrictor, plenum and runnerThis is done primarily to limit the power capability from the engine. Since the maximum mass flow rate is now a fixed parameter because of the restrictor, the aim is to allow the engine to achieve the maximum mass flow with minimal pull from the engine. In short, the pressure difference between atmosphere and the pressure created in the cylinder should be minimal, so that maximum airflow into the engine at all times.Our study revolves around finding such combination of angles of inclination and rise of the restrictor which should provide the vehicle maximum performance within limits directed by FSAE.We have simulated various design of Air restrictors based on different pair of angles for the Air-restrictor that could make a significant impact in the performance of the engine. The software we used for the same are ANSYS, SolidWorks. Sushil Pant | Pankaj Kumar | Ranjan Kishor"Design and Analysis of Air Intake System for Single Cylinder Engine" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2 , February 2018, URL: http://www.ijtsrd.com/papers/ijtsrd8388.pdf http://www.ijtsrd.com/engineering/automotive-engineering/8388/design-and-analysis-of-air-intake-system-for-single-cylinder-engine/sushil-pant
Numerical analysis for two phase flow distribution headers in heat exchangerseSAT Journals
Abstract A flow header having number of multiple small branch pipes are commonly used in heat exchangers and boilers. In beginning the headers were designed based on the assumption that the fluid distribute equally to all lateral pipes. In practical situation the flow is not uniform and equal in all lateral pipes. Mal distribution of flow in heat exchangers significantly affects their performance. Non-uniform flow distribution from header to the branch pipes in a flow system will lead to 25% decrease in effectiveness of a cross flow heat exchanger. Mal distribution of flow in the header is influenced by the geometric parameters and operating conditions of the header. In this work the flow distribution among the branch pipes of dividing flow header system is analyzed for two phase flow condition. In the two phase flow condition, the effect of change in geometric cross sectional shape of the header (circular, square), inlet flow velocities are varied to find the flow mal distribution through the lateral pipes are investigated with the use of Computational Fluid Dynamics software. Keywords: circular, square headers and Computational Fluid Dynamics software. (CFD)
Development of a Measuring Apparatus for Aerodynamic Properties of Granular M...CrimsonpublishersMCDA
In handling and processing of agricultural products, air or water is often used as a transport medium for separating the desirable product from unwanted materials. When an air stream is used for separating a product from its associated foreign materials, such as straw and chaff, knowledge of aerodynamic characteristics of all the particles involved is necessary. This helps to define the range of air velocities for effective separation of the grain from foreign materials. For this reason, the terminal velocity (Vt) has been used as an important aerodynamic characteristic of materials in such applications as pneumatic conveying and their separation from foreign materials.
For more open access journals in Crimson Publishers please click on link: https://crimsonpublishers.com
For more articles on journal of agronomy and crop science please click on below link: https://crimsonpublishers.com/mcda/
Flow analysis of centrifugal pump using CFX solver and remedies for cavitatio...IJERA Editor
In this scholarly thesis pertinent to the working of centrifugal pump, a CFD solver namely CFX is employed in order to simulate fluid flow characteristics with well-defined constraints and boundary conditions defining the problem. Stringent solid model is meticulously prepared encompassing the present day usage and constructional features of a centrifugal pump and is constrained with various boundary conditions having fixed domain in order to evaluate plots and results. To spearhead and facilitate this analysis program a numerical approximation tool with high degree of convergence rate called ANSYS 15.0 software is used. The ASNYS software avoids tedious calculations presumably impending in the design procedure and uses ultimate numerical tool to approximate the solution of the partial differential equations associated with continuity, momentum and energy phases of a flow problem in a 3-D model. This exquisite feature of ANSYS enables designer to optimize the design procedure in an iterative manner based on the final plots of post-processing phase. In addition, the scholarly writing also constitutes the appraisal of the most debilitating and painstaking problem retarding the efficiency of the centrifugal pump known as cavitation. Possible remedies for overcoming this problem will be indirectly inferred from the various plots and figures derived from the post-processing phase of the design process.
FLUID FLOW ANALYSIS OF CENTRIFUGAL FAN BY USING FEMIAEME Publication
The forward backward curved (mixed) Centrifugal fan 630 has been analyzed aerodynamically for compare experimental results with simulation results by using ANSYS FLUENT (Finite Element Analysis Software). The material of the fan impeller was specified as ALUMINIUM. Boundary conditions on the Centrifugal fan-630 are taken from the reference. The flow distribution across the fan is obtained. The maximum static pressure at the inlet is known and the pressure distributions across the blade are obtained accordingly. The obtained results are compared with Experimental results is discussed. In final recommended the design of the centrifugal fan and results are tabulated. It’s observed that simulation results are nearer to the experimental results.
Improving the Hydraulic Efficiency of Centrifugal Pumps through Computational...IJERA Editor
The design and optimization of turbo machine impellers such as those in pumps and turbines is a highly complicated task due to the complex three-dimensional shape of the impeller blades and surrounding devices. Small differences in geometry can lead to significant changes in the performance of these machines. We report here an efficient numerical technique that automatically optimizes the geometry of these blades for maximum performance. The technique combines, mathematical modeling of the impeller blades using non-uniform rational B-spline (NURBS), Computational fluid dynamics (CFD) with Geometry Parameterizations in turbulent flow simulation and the Globalized and bounded Nelder-Mead (GBNM) algorithm in geometry optimization.
The effect of rotational speed variation on the static pressure in the centri...IOSR Journals
The current investigation is aimed to simulate the three-dimensional complex internal flow in a
centrifugal pump impeller with five twisted blades by using specialized computational fluid dynamics (CFD)
software ANSYS /FLUENT 14code with a standard k-ε two-equation turbulence model.
A single blade passage will be modeled to give more accurate results for static pressure contours on (blade,
hub, and shroud). The potential consequences of static pressure associated with operating a centrifugal
compressor in variable rotation speed.
A numerical three-dimensional, through flow calculations to predict static pressure through a
centrifugal pump were presented to examined the effect of rotational speed variation on the static pressure of
the centrifugal pump . The contours of the static pressure of the blade, hub, and shroud indicates negative low
static pressure in the suction side at high rotational speed (over operation limits )and the static pressure
increases gradually until reach maximum value at the leading edge (6×105 Pa) of the blade.
Modeling and Development of Pneumatic Accumulating SystemIJMREMJournal
In the recent few years the quest for renewable energy has been increased. In developing countries like
Pakistan, energy crises are considered as critical problem for country’s economy. In this scenario there are two
possibilities either to improve the efficiency of energy conversion method or to discover new energy resources
i.e. renewable sources. Therefore, the main concern of this study is to develop an accumulating system which
can harness some amount of wasted energy of moving road vehicles. It has been found that road moving
vehicles are wasting huge amount of their potential energy. This wasted energy can be harvested by installing a
pneumatic accumulating system underneath the transient rout of moving vehicle, which can simulate wasted
energy for useful work. For the proposed system, mathematical model with governing equations is developed,
that shows efficient conversation of potential energy to the pressure energy. Developed model is programmed in
MATLAB for the real time comparison of output. It is observed that the proposed system is applicable to extract
wasted energy of road vehicle for useful purpose.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
Thermal analysis of water cooled charge air cooler in turbo charged diesel en...eSAT Journals
Abstract
Air-cooled and water-cooled charge air coolers are used as applications in automobiles. The cooling media include engine’s
coolant, ambient air or any other external coolant source. Charge air cooler with offset strip fin geometry is chosen on both hot
and cold sides with fin thickness 0.15 mm, length 3.2 mm, height 5.2 mm and frequency of 18 fins per inch. The flow rate on hot
side is taken as 0.3 kg/s and cold side as 2 kg/s for air-cooled charge air cooler and for water-cooled charge air cooler on hot
side it is 0.3 kg/s and cold side is 0.265 kg/s with inlet temperature on hot side 160 oC and cold side 40 oC. With the above
conditions, performance evaluation is done on both charge air coolers. Having found water-cooled charge air cooler is having
higher effectiveness than air-cooled type, performance evaluation is carried out on water-cooled charge air cooler with varying
mass flow rates on hot side from 0.1 to 0.6 kg/s and keeping cold fluid rate constant at 0.265 kg/s and the outputs obtained are
Colburn-j factor, Fanning friction factor, heat transfer coefficient, overall heat transfer coefficient and effectiveness of heat
exchanger. From the obtained results, graphs are drawn to assess the performance of the water charge air cooler.
Keywords: Charge Air Cooler, Plate Fin Heat Exchanger, Colburn-J Factor, Heat Transfer Coefficient, Fanning
Friction Factor, Effectiveness
An approach to evaluate the heat exchanger retrofit for installed industrial ...eSAT Journals
Abstract This paper is the first part of a two-part study aiming to introduce a new integrated approach to evaluate the techno-economic value of recuperator retrofit on existing gas turbine engines. The original gas turbines are designed for combined cycles so that the pressure ratios are moderate to secure suitable exhaust temperatures. One way to enhance the thermal efficiency of some gas turbines is by using recuperation to recover some of the exhaust heat. In this part, the developed model is described and implemented for two gas turbine engines so the obtained characteristics are evaluated against the actual data. The new approach will assist users to select the suitable gas turbine models with favorable recuperator characteristics based on a technical and economic prospective. Besides, the performance results are used to design an appropriate shell and tube heat exchanger. Moreover, a new technique has been established to define the typical heat exchanger parameters in order to ensure the highest possible improvements over the original cycles. One of the main features of this method is that it depends only on the velocity of hot and cold heat exchanger streams from which the rest of the heat exchanger design and performance characteristics were derived. Key Words: integrated approach, techno-economic value, recuperation, shell and tube heat exchanger, velocity
A REVIEW ON IMPROVEMENT OF EFFICIENCY OF CENTRIFUGAL PUMP THROUGH MODIFICATIO...ijiert bestjournal
The paper reviews the literature available on the i mprovement of efficiency of centrifugal pump through modification in suction manifolds. The paper discusses the available material of performance improvement through various paramete rs and mainly focuses on the research related to manifold modifications.
DESIGN IMPROVEMENTS OF VARIABLE DISPLACEMENT PUMPS-A REVIEWijiert bestjournal
In Variable displacement pump the displacement or amount of fluid pumped per revolution of
pump‟s input shaft can be varied as per requirement. This paper investigate the different
improvements achieved for increase the efficiency of variable displacement pump .This paper
also discussed about the alternative mechanisms for variable displacement pump to improve
efficiency and cost reduction of pump.
EXPERIMENTAL STUDIES ON THE INTAKE PORT OF A DIESEL ENGINE TO DETERMINE SWIRLijmech
This paper focuses on experimentalstudies of intake port of a four cylinder diesel engine for different
vacuum pressures and valve lift positions. In this study, the cylinder head is experimented through a paddle
wheel flow setup, which gives the flow coefficient and swirl number asoutput. Main scope of the work is to
understand the flow behaviour through the intake port and finally to determine mean flow coefficient and
mean swirl number for different valve lift ratios L/D, where L is valve lift and D is bore diameter.
Design and Analysis of Air Intake System for Single Cylinder Engineijtsrd
Our understanding of Air flow behavior around an object makes us better designer in order to achieve better performances from our automobiles. In this paper we present an analysis of air flow via air-intake system required to meet FSAE norms in SUPRA Vehicles.The aim of this project is to create a flow restriction device to be fitted in the SAE (Society of Automotive Engineers) car being built by Team Zenith, GB Pant Engineering College, New Delhi. The car is an open wheeled race vehicle, designed to go from 0-60 mph in under 4 seconds and have a top speed of about 80-90 mph.An Air-intake system in a FSAE SUPRA Vehicle consists of various components as followed: -1) Air Filter2) Air Restrictor3) Plenum4) Intake Manifold.Air enters at the filter and passes through restrictor, which is used to increase velocity and drop pressure and then enters into plenum which is used to provide better distribution of air flow and to prevent further drop in pressure.Design of Air restrictor is critical as per norms of FSAE due to fixed minimum neck diameter of 20 mm as demonstrated below. Fig: - Basic structure of restrictor, plenum and runnerThis is done primarily to limit the power capability from the engine. Since the maximum mass flow rate is now a fixed parameter because of the restrictor, the aim is to allow the engine to achieve the maximum mass flow with minimal pull from the engine. In short, the pressure difference between atmosphere and the pressure created in the cylinder should be minimal, so that maximum airflow into the engine at all times.Our study revolves around finding such combination of angles of inclination and rise of the restrictor which should provide the vehicle maximum performance within limits directed by FSAE.We have simulated various design of Air restrictors based on different pair of angles for the Air-restrictor that could make a significant impact in the performance of the engine. The software we used for the same are ANSYS, SolidWorks. Sushil Pant | Pankaj Kumar | Ranjan Kishor"Design and Analysis of Air Intake System for Single Cylinder Engine" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-2 , February 2018, URL: http://www.ijtsrd.com/papers/ijtsrd8388.pdf http://www.ijtsrd.com/engineering/automotive-engineering/8388/design-and-analysis-of-air-intake-system-for-single-cylinder-engine/sushil-pant
Numerical analysis for two phase flow distribution headers in heat exchangerseSAT Journals
Abstract A flow header having number of multiple small branch pipes are commonly used in heat exchangers and boilers. In beginning the headers were designed based on the assumption that the fluid distribute equally to all lateral pipes. In practical situation the flow is not uniform and equal in all lateral pipes. Mal distribution of flow in heat exchangers significantly affects their performance. Non-uniform flow distribution from header to the branch pipes in a flow system will lead to 25% decrease in effectiveness of a cross flow heat exchanger. Mal distribution of flow in the header is influenced by the geometric parameters and operating conditions of the header. In this work the flow distribution among the branch pipes of dividing flow header system is analyzed for two phase flow condition. In the two phase flow condition, the effect of change in geometric cross sectional shape of the header (circular, square), inlet flow velocities are varied to find the flow mal distribution through the lateral pipes are investigated with the use of Computational Fluid Dynamics software. Keywords: circular, square headers and Computational Fluid Dynamics software. (CFD)
Development of a Measuring Apparatus for Aerodynamic Properties of Granular M...CrimsonpublishersMCDA
In handling and processing of agricultural products, air or water is often used as a transport medium for separating the desirable product from unwanted materials. When an air stream is used for separating a product from its associated foreign materials, such as straw and chaff, knowledge of aerodynamic characteristics of all the particles involved is necessary. This helps to define the range of air velocities for effective separation of the grain from foreign materials. For this reason, the terminal velocity (Vt) has been used as an important aerodynamic characteristic of materials in such applications as pneumatic conveying and their separation from foreign materials.
For more open access journals in Crimson Publishers please click on link: https://crimsonpublishers.com
For more articles on journal of agronomy and crop science please click on below link: https://crimsonpublishers.com/mcda/
Flow analysis of centrifugal pump using CFX solver and remedies for cavitatio...IJERA Editor
In this scholarly thesis pertinent to the working of centrifugal pump, a CFD solver namely CFX is employed in order to simulate fluid flow characteristics with well-defined constraints and boundary conditions defining the problem. Stringent solid model is meticulously prepared encompassing the present day usage and constructional features of a centrifugal pump and is constrained with various boundary conditions having fixed domain in order to evaluate plots and results. To spearhead and facilitate this analysis program a numerical approximation tool with high degree of convergence rate called ANSYS 15.0 software is used. The ASNYS software avoids tedious calculations presumably impending in the design procedure and uses ultimate numerical tool to approximate the solution of the partial differential equations associated with continuity, momentum and energy phases of a flow problem in a 3-D model. This exquisite feature of ANSYS enables designer to optimize the design procedure in an iterative manner based on the final plots of post-processing phase. In addition, the scholarly writing also constitutes the appraisal of the most debilitating and painstaking problem retarding the efficiency of the centrifugal pump known as cavitation. Possible remedies for overcoming this problem will be indirectly inferred from the various plots and figures derived from the post-processing phase of the design process.
FLUID FLOW ANALYSIS OF CENTRIFUGAL FAN BY USING FEMIAEME Publication
The forward backward curved (mixed) Centrifugal fan 630 has been analyzed aerodynamically for compare experimental results with simulation results by using ANSYS FLUENT (Finite Element Analysis Software). The material of the fan impeller was specified as ALUMINIUM. Boundary conditions on the Centrifugal fan-630 are taken from the reference. The flow distribution across the fan is obtained. The maximum static pressure at the inlet is known and the pressure distributions across the blade are obtained accordingly. The obtained results are compared with Experimental results is discussed. In final recommended the design of the centrifugal fan and results are tabulated. It’s observed that simulation results are nearer to the experimental results.
Improving the Hydraulic Efficiency of Centrifugal Pumps through Computational...IJERA Editor
The design and optimization of turbo machine impellers such as those in pumps and turbines is a highly complicated task due to the complex three-dimensional shape of the impeller blades and surrounding devices. Small differences in geometry can lead to significant changes in the performance of these machines. We report here an efficient numerical technique that automatically optimizes the geometry of these blades for maximum performance. The technique combines, mathematical modeling of the impeller blades using non-uniform rational B-spline (NURBS), Computational fluid dynamics (CFD) with Geometry Parameterizations in turbulent flow simulation and the Globalized and bounded Nelder-Mead (GBNM) algorithm in geometry optimization.
The effect of rotational speed variation on the static pressure in the centri...IOSR Journals
The current investigation is aimed to simulate the three-dimensional complex internal flow in a
centrifugal pump impeller with five twisted blades by using specialized computational fluid dynamics (CFD)
software ANSYS /FLUENT 14code with a standard k-ε two-equation turbulence model.
A single blade passage will be modeled to give more accurate results for static pressure contours on (blade,
hub, and shroud). The potential consequences of static pressure associated with operating a centrifugal
compressor in variable rotation speed.
A numerical three-dimensional, through flow calculations to predict static pressure through a
centrifugal pump were presented to examined the effect of rotational speed variation on the static pressure of
the centrifugal pump . The contours of the static pressure of the blade, hub, and shroud indicates negative low
static pressure in the suction side at high rotational speed (over operation limits )and the static pressure
increases gradually until reach maximum value at the leading edge (6×105 Pa) of the blade.
Modeling and Development of Pneumatic Accumulating SystemIJMREMJournal
In the recent few years the quest for renewable energy has been increased. In developing countries like
Pakistan, energy crises are considered as critical problem for country’s economy. In this scenario there are two
possibilities either to improve the efficiency of energy conversion method or to discover new energy resources
i.e. renewable sources. Therefore, the main concern of this study is to develop an accumulating system which
can harness some amount of wasted energy of moving road vehicles. It has been found that road moving
vehicles are wasting huge amount of their potential energy. This wasted energy can be harvested by installing a
pneumatic accumulating system underneath the transient rout of moving vehicle, which can simulate wasted
energy for useful work. For the proposed system, mathematical model with governing equations is developed,
that shows efficient conversation of potential energy to the pressure energy. Developed model is programmed in
MATLAB for the real time comparison of output. It is observed that the proposed system is applicable to extract
wasted energy of road vehicle for useful purpose.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Software testing effort estimation with cobb douglas function a practical app...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Energy efficient task scheduling algorithms for cloud data centerseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Design and development of high frequency resonant transition convertereSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Impact assessment of factors affecting information technology projects in riv...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Analytical study and implementation of digital excitation system for diesel g...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Effect of modulus of masonry on initial lateral stiffness of infilled frames ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
“Optimizing the data transmission between multiple nodes during link failure ...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Accelerted testing of deteriorated concrete structures due to carbonationeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
“Development and performance analysis of a multi evaporating system”eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Optimization of design of mixed flow centrifugal pump impeller using cfdeSAT Journals
Abstract
Centrifugal pumps are widely used hydraulic machines, irrespective of the fact that their performance is generally not very good. So, turning them into more efficient machines is quite a challenge. The performance of a centrifugal pump is highly dependent on its geometrical parameters and its vane profile. In order to analyze the flow through complex systems like centrifugal pumps, Computation fluid dynamics (CFD) has been used. This work aims to study the performance analysis of a centrifugal mixed flow pump designed to deliver 0.25 m3/s of water with a head of 20 m at a speed of 1450 rpm using ANSYS CFX (ver.14.0). PTC Creo (ver. 2.0) has been used to model the pump unit. The performance of the pump was first determined using the existing vane angles and thickness of the blade then, the inlet vane angle, the outlet vane angle along with the thickness of the blade has been varied to analyze the pump’s performance . The results show that for an initial inlet angle 21.08˚, outlet angle 16.28˚ and blade thickness as 10mm, the efficiency of the pump was 84%. However, the efficiency of pump rises to 89.19% for the optimized angles and blade thickness.
Keywords: Computational Fluid Dynamics (CFD) Analysis, Mixed Flow Pump, Overall Efficiency.
Performance, Optimization and CFD Analysis of Submersible Pump Impellerijsrd.com
To improve the efficiency of submersible flow pump, Computational Fluid Dynamics (CFD) analysis is one of the advanced tools used in the pump industry. A detailed CFD analysis was done to predict the flow pattern inside the impeller which is an active pump component. From the results of CFD analysis, the velocity and pressure in the outlet of the impeller is predicted. CFD analyses are done using ANSYS CFX software. In this research paper we will modified the impeller design by choosing some parameter.
Cfd simulation of single stage axial flow compressor for varying blade aspect...eSAT Journals
Abstract The aspect ratio of blade is an important parameter and has a strong influence on the performance of axial flow compressor. The performance of axial flow compressors is known to be affected by the choice of aspect ratio (the ratio of blade height to axial chord length). A study has been carried out to verify the effect of aspect ratio on the performance of 1.2 pressure ratio single stage subsonic compressor through AxStream analysis using Axial flow compressor design. The analysis has been carried out for the constant tip diameter of the compressor rotor blade having an aspect ratio 1, 2 and 3 and obtained the pressure loss and flow parameters of the compressor stage. This paper shows that the best operating conditions occur for the aspect ratio between 2 and 3. Keywords: Axial flow compressor, Aspect ratio, Computational Fluid Dynamic, AxStream
Effect of tip clearance on performance of a centrifugal compressoreSAT Journals
Abstract The centrifugal compressor is to study the effect of tip clearance on the performance characteristics and the wall static pressure for a different flow co-efficient. The method of testing the compressor is run at a constant speed at 2000rpm. The tip clearance is varied by using spacers. The volume flow rate is varied with the help of throttling device to conduct the performance test. The performance characteristic of the centrifugal compressor showing the variation of discharge pressure with volume flow rate is plotted. Obtaining the performance characteristics showing the variation of discharge pressure with volume flow rate for different tip clearance, viz. =2.2%, 4%, 6.1% and 7.9%. Measurement of periodic pressure at various tip clearance viz. =2.2%, 4%, 6.1% and 7.9%. For each tip clearance pressure measured in radial location of impeller at 6 positions for different flow co efficient values. Five flow coefficients viz., ф =0.40, =0.34 (both above design flow), =0.28 (near design flow), =0.21=0.18 (both below design flow) and four values of non-dimensional tip clearance viz., =2.2%, 4%, 6.1% and 7.9%, are chosen for experimental work. The objective of the research work is to measure the periodic variation static pressure on the casing over the rotor at different values of tip clearance and flow coefficients. With the availability of these data, it is possible to improve the tip clearance flow in centrifugal compressor.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance evaluation and flame stabilization of stagnation point reverse fl...eSAT Journals
Abstract
The conventional gas turbine engines use straight flow combustors. The reverse-flow layout effectively uses the air flow to cool down the combustor liner and the transition piece as a counter flow heat exchanging process. The absorbed heat by the air is returned back to the system. The reverse flow configuration causes the flow to stagnate and hot products to reverse and leave the combustor.
One of the major challenges facing designers of low NOx emission combustion systems is flame stability, as the weaker combustion process is more vulnerable to small perturbations in combustor operating conditions. Since further reduction of NOx will likely require even leaner mixtures, schemes for lean stability extension must be considered. Stability can be dependent on the balance between flow and flame propagation velocities. In combustors where combustion is limited by reaction rates, however practical combustors do not operate in either limit. To stabilize a flame in the desired region of interest, various stabilization methodologies are adopted that either enhance the flame propagation speeds or create zones with low velocities where a flame can be sustained for inspection of premixed flame stability in Stagnation Point Reverse Flow combustor model, using Computational Fluid dynamics(CFD). The CFD analysis yielded the results which go with actual experimental results.
Keywords: combustor, stagnation, flame stability, reverse flow, Computational Fluid Dynamics (CFD) etc..
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
Predicting Performance Curves of Centrifugal Pumps in the Absence of OEM DataVijay Sarathy
Chemical and Mechanical Engineers in the oil & gas industry often carry out the task of conducting technical studies to evaluate piping and pipeline systems during events such as pump trips and block valve failures that can lead to pipes cracking at the welded joints, pump impellers rotating in the reverse direction and damaged pipe supports due to excessive vibrations to name a few. Although much literature is available to mitigate such disturbances, a key set of data to conduct transient studies are pump performance curves, a plot between pump head and flow.
The present paper is aimed at applying engineering research in industrial applications for practicing engineers. It provides a methodology called from available literature from past researchers, allowing engineers to predict performance curves for a Volute Casing End Suction Single Stage Radial Pump. In the current undertaking, the pump in question is not specific to any one industry but the principles are the same for a Volute Casing End suction radial pump.
Design optimization of an axial flow compressor for industrial gas turbineeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
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Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
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Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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Cfd analysis of mixed flow impeller
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
__________________________________________________________________________________________
Volume: 03 Special Issue: 03 | May-2014 | NCRIET-2014, Available @ http://www.ijret.org 601
CFD ANALYSIS OF MIXED FLOW IMPELLER
Neelambika1
, Veerbhadrappa2
1
Asst. Prof. Mechanical Engg Dept. Govt. Polytechnic Kalagi
2
Asst. Prof. Mech. Engg Dept. BKIT Bhalki-585328
Abstract
Now a day’s Computational Fluid dynamics (CFD) is playing a vital role in all the fields. To improve the efficiency of mixed flow
pump, Computational Fluid Dynamics analysis is one of the advanced tools used in the industry. A detailed CFD analysis was done to
predict the flow pattern inside the impeller which is an active pump component. From the results of CFD analysis, the velocity and
pressure in the outlet of the impeller is predicted. CFD analyses are done using Ansys software. These outlet flow conditions are used
to calculate the efficiency of the impeller. The calculated value of efficiency from the empirical relations is 55%. The optimum inlet
and outlet vane angles are calculated for the existing impeller by using the empirical relations. The CAD models of the mixed flow
impeller with optimum inlet and outlet angles are modeled using CAD modeling software Catia-V5R19. To find the relationship
between the vane angles and the impeller performance the optimum vane angle is achieved step by step. Three CAD models are
modeled with the vane angles between existing and optimum values. These models are analyzed individually to find the performance
of the impeller. In the first case, outlet angle is increased by 5°. From the outlet flow conditions, obtained from the CFD analysis, it is
evident that the reduced outlet recirculation and flow separation cause the improved efficiency. By changing the outlet angle the
efficiency of the impeller is improved to 59%. In the second case inlet angle is decreased by 10%. The efficiency of the impeller in
this case is 61%. From this analysis it is understood that the changes in the inlet vane angle did not change the efficiency of the
impeller as much as the changes in outlet angle. From the CFD analysis the efficiency of the impeller with optimum vane angles is
calculated as 65%. Thus, efficiency of the mixed flow impeller is improved by 18.18% by changing the inlet and outlet vane angles.
----------------------------------------------------------------------***---------------------------------------------------------------------
1. INTRODUCTION
A wide variety of centrifugal pump types have been
constructed and used in many different applications in
industry and other technical sectors. However, their design
and performance prediction process is still a difficult task,
mainly due to the great number of free geometric parameters,
the effect of which cannot be directly evaluated. The
significant cost and time of the trial-and-error process by
constructing and testing physical prototypes reduces the profit
margins of the pump manufacturers. For this reason CFD
analysis is currently being used in the design and construction
stage of various pump types.
The experimental way of pump test can give the actual value
of head developed, power rating and efficiency. But the
internal flow conditions cannot be predicted by the
experimental results. From the CFD analysis software and
advanced post processing tools the complex flow inside the
impeller can be analyzed. The complex flow characteristics
like inlet pre-swirl, flow separation and outlet recirculation
cannot be visualized by the experimental way of pump test.
But in the case of CFD analysis the above flow characters can
be visualized clearly. Moreover design modification can be
done easily and thus CFD analysis reduces the product
development time and cost. Mixed flow pumps are widely
used for water transportation or as cooling water pumps in
power stations. Their operating range spans from full-load
down to close to the shut-off head. In order to develop a
reliable machine for this highly demanding operation, the
behavior of the flow in the entire pump has to be predicted by
a reliable computational method.
2. PUMP CHARACTERISTICS
2.1 Cavitation
Cavitation is a hydraulic phenomenon in which vapor bubbles
form and suddenly collapse (implode) as they move through a
pump impeller. Implosions occur on each of the vanes of the
impeller causing excessive noise. The hydraulic effect on the
pump is a significant reduction in performance. The
mechanical effects can include shock waves and vibration
which may result in damage to the impeller vanes, bearings,
and seals.
2.2 Vortexing
A vortex can occur at the impeller and may extend to the
surface of the liquid. If this occurs, air will be sucked into the
pump. The effects can be similar to cavitation: reduced
hydraulic efficiency and increased wear on the pump. Dicmas
identifies three stages of vortexing3:
2.3 Net Positive Suction Head Required
Net positive suction head required (NPSHR) is the head above
vapor pressure head required to ensure that cavitation does not
occur at the impeller. The value is specific to each pump inlet
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design. It is independent of the suction piping system. The
NPSHR is determined by bench scale tests of geometrically
similar pumps operating at a constant speed and discharge
with varying suction heads. The development of cavitation is
usually indicated by approximately a 3% drop in the head
developed at the suction inlet valve. The NPSHR is specified
by the manufacturer.
2.4 Specific Speed
Specific speed, Ns, is often quoted as a dimensionless design
index for pump impellers. However, strictly speaking, it has
dimensions that are in terms of:
[L0.75
T-0.5
] x revolutions per minute
Where L represents units of length, and T represents units of
time.
Specific speed is used to identify an upper limit on the shaft
speed for any particular combination of total head, flow, and
suction conditions. The specific speed is determined using the
following equation:
75.0
5.0
H
NQ
CNs (2.1)
N = pump speed, rpm
Q = pump capacity at Best Efficiency Point
(BEP), m3
/hr (gpm)
H = pump head at BEP, m (ft)
C = unit factor = 0.861 * (1)
* For consistency with US manufacturers’ pump data, a unit
factor for metric units is given to result in a consistent value
that is really in English units. The designer should verify the
derivation and manufacturer’s use of specific speed.
By applying pump affinity laws, a pump designer can predict
the change in performance of a pump in response to changing
speed. Discussion of affinity laws is beyond the scope of this
manual. For a discussion, refer to a text such as Pump
Performance Characteristics and Applications.4
2.5 Suction Specific Speed
Suction Specific Speed, Nss, is a dimensionless index that is
both representative of the geometry of the suction side of the
impeller, and is used to determine the form and proportions of
the impeller. The index can be used to select a pump
maximum speed that will likely yield the smallest size of
pump for the design conditions. It is determined using the
following equation:
75.0
5.0
NPSHR
NQ
CNss (8.2)
NPSHR=net positive suction head required, m (ft)
Nss = suction specific speed, rpm
N = pump speed, rpm
Q = pump capacity at Best Efficiency Point (BEP), m3
/hr
(gpm)
C = unit factor = 0.861 * (1)
Selection of Impeller Type
Table 1.1 indicates the ranges of specific speed over various
impellers that are recommended for use.
Table 1.1. Specific speed range for impellers
Impeller Type
Specific Speed
Upper Lower
Axial Flow 20,000 8,500
Mixed Flow (open) 10,000 5,000
Mixed Flow (closed) 6,200 4,000
Centrifugal 4,100 2,500
2.6 Pump Performance
Pump performance is measured as the variation in pumping
capacity with respect to total dynamic head. Pump
performance is a function of the following pump
characteristics: pump type, pump size, impeller size, and
speed.
Pump performance can be shown either as a single line curve
for one impeller diameter or as multiple curves for the
performance of several impeller diameters in one casing.
Figure 1.3 shows a typical single pump performance curve.
The point at which maximum efficiency is achieved is
represented by the best efficiency point, BEP, as shown in
Figure 1.4.
In this work, the mixed flow pump detailed geometric feature
of the impeller is studied and parameterization of impeller
geometry is done. Parameterization is done by reducing
number of controlling geometric variables, facilitating the
investigation of their individual or combined effects on the
flow and the impeller performance
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Fig.2.1: Typical pump performance curve
Fig.2.2: Simplified manufacturer’s pump performance curves
The specification of the pump is given in the Table 2.2.
Typical submersible pump consists of impeller, diffuser, riser,
discharge adapter, intermediate bowl and shaft is shown in
Fig.1.7The performance of a pump depends on active pump
components. The active pump components of a mixed flow
pump are mixed flow impeller and guide vanes. These parts
are important while analyzing a pump because mechanical
energy (rotation) is transferred into fluid energy (pressure,
velocity) by the active pump components. The geometry of a
mixed flow pump impeller is highly complex in nature. The
mixed flow geometry consists of several features of which the
following geometric features are important as they have direct
effect on overall pump performance.
Table 2.2: Specification of the pump
Bore size 152.4 mm
Capacity 40 m3/hr
Number of stages 6
Head 28 m per stage
Flow type Mixed flow
Fig.2.3: Mixed flow pump
3. CFD ANALYSIS OF MIXED FLOW PUMP
A thorough knowledge of all significant inviscid effects (blade
blockage, flow turning, finite hub/tip ratio, etc.) and viscous
effects (boundary-layer growth, energy dissipation, etc.) is
essential in the accurate prediction of the flow in all turbo
machinery. Relevant to this, the availability of computer with
large storage capacities and fast computation times greatly
enhance the possibility of numerically solving the complete
equations of motion. It is widely accepted that the
incompressible time-averaged Navier-Stokes equation
Pump Performance
0
5
10
15
20
25
0 500 1000 1500
Pump Rate (m3
/hr)
TotalDynamicHead
(m)
0
5
10
15
20
25
30
0 200 400 600 800 1000 1200 1400 1600
Flow (m3
/hr)
Head(m)
450
350
375
400
325
425
82
80
78
76
82
80
78
76
Best Efficiency Point
Impeller diameter (mm)
Performance curve for impeller size
Efficiency curve
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together with the continuity equation comprise a closed set of
equations, and which should be supplemented by appropriate
boundary and initial conditions to form a complete description
of the fluid velocity u(x,t) r and pressure field in flow pumps.
3.1 Geometric Modeling Pump
Table.3.1: Blade Impeller Parameter
Impeller inlet (Di) 75 mm
Impeller outlet (Do) 105 mm
Blades number 6
Inlet angle(α) 550
Outlet angle (β) 750
Blade thickness (t) 1.25 mm
Blade inlet height (Li) 21 mm
Blade outlet height (Lo) 16 m
Fig 3.1: Existing Impeller vane dimensions
In RANS simulations, the choice of mesh type is of critical
importance. In this study, the widely used structured body-
fitted curvilinear meshes are chosen rather than unstructured
tetrahedral meshes. Body-fitted structured meshes are well
suited for viscous flow because they can be easily compressed
near all solid surfaces. Using a multi block approach, they are
also convenient for discretizing the flow passages in
turbomachinery flows with rather straightforward geometries,
which includes blade tip clearances and relative motion.
The grid used for the present study is shown in Figure 3.6 and
3.7 with the 3D view and blade-to-blade view. The grid for the
used for this study is impeller 0.3 millions.
Fig.3.2: Blade to Blade View of Mixed Impeller Pump
Fig. 3.3: CFD Meshing of Mixed Impeller Pump
4. RESULTS AND DISCUSSIONS
4.1 Inlet angle 750
and outlet Angle 550
Flow distribution in impeller at different span
The pressure increases gradually along stream wise direction
within impeller passage and has higher pressure in pressure
side than suction side of the impeller blade. However, the
pressure developed inside the impeller is not so uniform. The
isobar lines are not all perpendicular to the pressure side of the
blade inside the impeller passage; this indicated that there
could be a flow separation because of the pressure gradient
effect. The fig 4.1 shows the pressure distribution within the
impeller at three different 50 percent spans
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Fig. 4.1: Pressure distribution at 50% span
Velocity also increases gradually along streamwise direction
within the impeller passage.As the flow enters the impeller
eye, it is diverted to the blade-to-blade passage. The flow at
the entrance is not shockless because of the unsteady flow
entering the impellerpassage. The separation of flow can be
seen at the blade leading edge. Since, the flow atthe inlet of
impeller is not tangential to the blade, the flow along the blade
is not uniformand hence the separation of flow takes place
along the surface of blade. Here it can beseen that flow
separation is taking place on both side of the blade, ie,
pressure and suction side as shown in fig 4.2
Fig. 4.2: Velocity distribution at 50% span
4.1.2 Pressure and Velocity between Impeller Blades
The distribution of total pressure between the blades of the
impeller is shown in the fig [4.3]. The lowest total pressure
appears at the inlet of the impeller suction side. This is the
position where cavitation often appears in the centrifugal
pump. The highest total pressure occurs at the outlet of
impeller, where the kinetic energy of flow reaches maximum.
Fig. 4.3: Contour of Pt (Total Pressure) at 50% Span
The fig [4.4] shows the static pressure distribution at the span
of 50 between the blades of the impeller. It is observed that the
static pressure inside the impeller blades is asymmetry
distributed. The minimum static pressure area appears at the
back of the impeller blade ie suction side, at the inlet.
Fig. 4.4: Contour of Ps (Static Pressure) at 50% Span
The fig [4.5] shows the relative velocity distribution at 50 span
between two blades of the impeller. The rising flow speed of
the fluid from inlet to outlet reaches maximum at the impeller
blade outlet. From the pressure distribution plot, pressure
gradient changes gradually from inlet radius to outlet radius
for each impeller. In order to transmit power to the liquid,
pressure on the leading or pressure side of the vane should be
higher than pressure on the suction side of the vane.
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Fig. 4.5: Contour of Width of the element at 50% Span
4.1. Fig. 4.6: Contour of Width element at Blade trailing edge
Fig [4.13] shows the velocity streamlines at the trailing edge
which shows that how the flow leaves the blades of the
impeller.
Fig.4.7: Velocity Streamlines at Blade trailing edge
4.1.3 Blade Loading at Pressure and Suction Side
The blade loading of pressure and suction side are drawn at
three different locations on the blade at the span of 20, 50 and
80 from hub towards the shroud. The pressure loading on the
impeller blade is shown in fig [4.14]. Pressure load on the
impeller blade is plot along the stream wise direction. The
pressure difference on the pressure and suction sides of the
blade suggests that the flow inside the impeller experiences
the shearing effects due to the pressure difference on blade-to-
blade passage wall.
Fig.4.8: Blade loading at 20, 50 and 80 span
4.1.4 Stream Wise Plots
The effects of flow rate on the pressure inside the impeller
passage along the stream wise direction are shown in Fig
[4.15], which shows the flow rate effects on the pressure
distribution on the impeller blade. The pressure for the
minimum flow rate is found maximum at the outlet of the
impeller and vice versa. Similarly relative velocity is shown in
4.16.
Fig. 4.9: Stream Wise plots Pressure
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Fig. 4.10: Stream Wise plots Relative velocity
5. CONCLUSIONS
Based on the CFD analysis of the mixed flow impeller, the
following conclusions are made. The best efficiency point of
the pump is found to be 11 lps. The existing impeller, the head
and efficiency are found out to be 19.24 m and 55%
respectively. The impeller 1, the percentage increase in the
head and efficiency are 3.22% and 7.27% respectively. The
impeller 2, the percentage increase in the head and efficiency
are 10.29% and 10.91% respectively. The impeller 3, the
percentage increase in the head and efficiency are 13.66% and
18.18% respectively. Based on the above, it is concluded that
impeller 3 gives better performance. Thus CFD analysis is an
effective tool to analyze quickly and inexpensively the effect
of design and operating parameter of pump. By properly
designing pump impeller, the efficiency of pump can be
improved.
REFERENCES
[1] Lazarkiewicz, S. and Troskolanski, A. T. (1965)
Impeller Pumps, Pergamon Press Ltd., Oxford.
[2] Goto, A. (1995) “Numerical and Experimental Study of
3-D Flow Fields within a Diffuser Pump Stage at Off-
Design Condition,” ASME Fluids 95, FED-Vol.227,
pp. 1-9.
[3] 11. CFX User Manual Version 5.6 (2003) CFX
Ltd., United Kingdom. 12. Muggli, F. A., Holbein, P.
and Dupont, P., (2002) “CFD Calculation of aMixed
Flow Pump Characteristics from Shutoff to Maximum
Flow” ASME Journal of Fluids Engineering., Vol. 124,
pp. 798-802. 94
[4] 13. CFdesign User’s Guide Version 7.0 (2004)
Blue Ridge Numerics, Inc., Charlottesville.
[5] 14. Hirsch, Ch. (1994) “ CFD Methodology and
Validation for Turbomachinery Flows”,
Turbomachinery Design Using CFD-AGARD Lecture
Series 195,Specialised Printing Services, Essex, pp 4-7.
[6] 15. Majidi, K., (2005) “ Numerical Study of
Unsteady Flow in a Centrifugal Pump” ASME Journal
of Turbomachinery., Vol. 127, pp. 363-371.