This document summarizes the results of a computational fluid dynamics analysis of a centrifugal compressor with grooves on the casing. Three cases were analyzed: without grooves, with two grooves, and with three grooves. For the case with two grooves, the passage wake area (region of low velocity flow) near the casing was reduced, velocity in this area increased, and pressure ratio improved at all flow coefficients compared to the no groove case. However, for the case with three grooves, while the passage wake area was further reduced, the velocity and pressure in this area decreased due to greater leakage flow through the grooves, resulting in a reduction in pressure ratio. Overall, the two groove configuration provided better performance
Effect of tip clearance on a centrifugal compressorIAEME Publication
This document summarizes a computational analysis of the effect of tip clearance on a low-speed centrifugal compressor. A centrifugal compressor impeller with three tip clearances (0%, 2%, and 5% of blade height) was examined at five flow coefficients using computational fluid dynamics software. The results found that static and total pressure decreased with increasing tip clearance. Blade loading charts and pressure/velocity contours showed lower pressures and velocities on the blade surfaces with larger tip clearances. In conclusion, tip clearances were found to increase losses in the centrifugal compressor.
This document summarizes a study comparing two supersonic nozzles with different outlet divergence angles (10 degrees and 20 degrees). Computational fluid dynamics (CFD) analysis was performed on the nozzles, which had the same inlet and throat dimensions but different expansion angles. The analysis found that the nozzle with a 20 degree divergence angle produced a higher exit velocity (Mach 5.62 vs 4.31) and had lower temperatures and pressures throughout the expansion zone, indicating it was the better-performing nozzle of the two designs.
This document summarizes a study on fluid flow and heat transfer from multiple circular jets impinging on a flat plate. Computational fluid dynamics simulations were performed using the k-ω SST turbulence model to analyze the flow structure and pressure distribution. Experiments using an oil-lampblack visualization technique were also conducted for comparison. The simulations examined the effects of varying the jet-to-plate spacing ratio (h/d) from 0.5 to 4 and the Reynolds number from 9075 to 13624. It was observed that the flow topology was independent of Reynolds number but depended strongly on h/d. Primary pressure peaks occurred at stagnation points and secondary peaks at wall jet interaction regions.
Numerical Simulation of a Centrifugal CompressorIJERA Editor
In this paper, the tip clearance effects on flow field of a low speed centrifugal compressor without and with partial shroud (PS) fitted on to the rotor blade tip at three values of tip clearance, viz. = 2.2%, 5.1% and 7.9% of rotor blade height at the exit at three flow coefficients, namely, = 0.18, 0.28, and 0.34, was studied. Based on the theory of computational fluid dynamics (CFD), performance curves and parameter distributions of the compressor were obtained from the 3-D numerical simulation by using ANSYS CFX 15.0. The centrifugal compressor in aerodynamic requirement is that edge velocities along the impeller channel passage surfaces like hub, shroud, pressure and suction surfaces vary smoothly without sudden decelerations, which cause flow separation leading to losses. Using the periodic boundaries and defined flow conditions at inflow / exit flow and blade rotations, the turbulent viscous flow between blade channels are computed. The efficiency related parameters using average quantities, besides flow pattern in terms of velocities, streamlines and pressure distribution on blade surfaces are graphically interpreted. An attempt is also made to study the influence of pressure loads on structural deformations in the chosen blade profile. This paper highlights aero-mechanical features of centrifugal impeller obtained from several numerical simulations, which are expected to provide a sound basis for further investigations. Keywords: Centrifugal compressor, Fl
A NUMERICAL STUDY OF HEAT TRANSFER AND FLUID FLOW IN A BANK OF TUBES WITH INT...IAEME Publication
The present work represents a two-dimensional steady state numerical investigation of heat transfer and hydrodynamic characteristics of air flow across a 3 rows of circular tube banks in triangular arrangement with triangular wake splitters placed on each tube with downstream direction (wake region). The effects of Reynolds number (from 5000 to 15000), the length of splitter are 0.5D, 1.0D, and 1.5D times of tube diameter. The study focuses on the Influence of the different
parameters of splitters on heat transfer and fluid flow characteristics of three rows tube banks. The characteristics of total heat transfer per area for each tube with and without splitter and total pressure drop are studied numerically by the aid of the computational fluid dynamics (CFD) commercial code of FLUENT 6.3.
Iaetsd study and experimental analysis of linear and non linear behaviour ofIaetsd Iaetsd
The document describes an experimental study on the linear and non-linear behavior of pipe bends with ovality. Various pipe bend schedules including SCH 40 long radius, SCH 40 short radius, and SCH 80 short radius bends were tested under in-plane and out-of-plane bending moments both with and without internal pressure. Displacement and percentage change in ovality were measured in the intrados, crown, and extrados regions. The displacement in the intrados and extrados increased linearly with load. Allowable limit loads and ovality are suggested to avoid pipe rejection due to insufficient wall thickness. Mathematical and software results were compared to experimental results to optimize output.
Simulation of Secondary Flow in Lubrication Pipe with End Bends of an Aero En...IRJET Journal
1) The document simulates oil flow behavior in the pressure pipe line of an aero engine using computational fluid dynamics (CFD). It examines the flow characteristics at five sections between the inlet and outlet.
2) Secondary flow develops at the bended sections due to curvature effects. Dean vortices form and their locations are visualized. Velocity decreases around the inner curvature and increases around the outer curvature.
3) Pressure drops slightly from 5 bar at the inlet to 4.9 bar at the outlet due to the short pipe length. Higher pressure variations occur around the bends.
Design and Optimization of Axial Flow Compressorijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Effect of tip clearance on a centrifugal compressorIAEME Publication
This document summarizes a computational analysis of the effect of tip clearance on a low-speed centrifugal compressor. A centrifugal compressor impeller with three tip clearances (0%, 2%, and 5% of blade height) was examined at five flow coefficients using computational fluid dynamics software. The results found that static and total pressure decreased with increasing tip clearance. Blade loading charts and pressure/velocity contours showed lower pressures and velocities on the blade surfaces with larger tip clearances. In conclusion, tip clearances were found to increase losses in the centrifugal compressor.
This document summarizes a study comparing two supersonic nozzles with different outlet divergence angles (10 degrees and 20 degrees). Computational fluid dynamics (CFD) analysis was performed on the nozzles, which had the same inlet and throat dimensions but different expansion angles. The analysis found that the nozzle with a 20 degree divergence angle produced a higher exit velocity (Mach 5.62 vs 4.31) and had lower temperatures and pressures throughout the expansion zone, indicating it was the better-performing nozzle of the two designs.
This document summarizes a study on fluid flow and heat transfer from multiple circular jets impinging on a flat plate. Computational fluid dynamics simulations were performed using the k-ω SST turbulence model to analyze the flow structure and pressure distribution. Experiments using an oil-lampblack visualization technique were also conducted for comparison. The simulations examined the effects of varying the jet-to-plate spacing ratio (h/d) from 0.5 to 4 and the Reynolds number from 9075 to 13624. It was observed that the flow topology was independent of Reynolds number but depended strongly on h/d. Primary pressure peaks occurred at stagnation points and secondary peaks at wall jet interaction regions.
Numerical Simulation of a Centrifugal CompressorIJERA Editor
In this paper, the tip clearance effects on flow field of a low speed centrifugal compressor without and with partial shroud (PS) fitted on to the rotor blade tip at three values of tip clearance, viz. = 2.2%, 5.1% and 7.9% of rotor blade height at the exit at three flow coefficients, namely, = 0.18, 0.28, and 0.34, was studied. Based on the theory of computational fluid dynamics (CFD), performance curves and parameter distributions of the compressor were obtained from the 3-D numerical simulation by using ANSYS CFX 15.0. The centrifugal compressor in aerodynamic requirement is that edge velocities along the impeller channel passage surfaces like hub, shroud, pressure and suction surfaces vary smoothly without sudden decelerations, which cause flow separation leading to losses. Using the periodic boundaries and defined flow conditions at inflow / exit flow and blade rotations, the turbulent viscous flow between blade channels are computed. The efficiency related parameters using average quantities, besides flow pattern in terms of velocities, streamlines and pressure distribution on blade surfaces are graphically interpreted. An attempt is also made to study the influence of pressure loads on structural deformations in the chosen blade profile. This paper highlights aero-mechanical features of centrifugal impeller obtained from several numerical simulations, which are expected to provide a sound basis for further investigations. Keywords: Centrifugal compressor, Fl
A NUMERICAL STUDY OF HEAT TRANSFER AND FLUID FLOW IN A BANK OF TUBES WITH INT...IAEME Publication
The present work represents a two-dimensional steady state numerical investigation of heat transfer and hydrodynamic characteristics of air flow across a 3 rows of circular tube banks in triangular arrangement with triangular wake splitters placed on each tube with downstream direction (wake region). The effects of Reynolds number (from 5000 to 15000), the length of splitter are 0.5D, 1.0D, and 1.5D times of tube diameter. The study focuses on the Influence of the different
parameters of splitters on heat transfer and fluid flow characteristics of three rows tube banks. The characteristics of total heat transfer per area for each tube with and without splitter and total pressure drop are studied numerically by the aid of the computational fluid dynamics (CFD) commercial code of FLUENT 6.3.
Iaetsd study and experimental analysis of linear and non linear behaviour ofIaetsd Iaetsd
The document describes an experimental study on the linear and non-linear behavior of pipe bends with ovality. Various pipe bend schedules including SCH 40 long radius, SCH 40 short radius, and SCH 80 short radius bends were tested under in-plane and out-of-plane bending moments both with and without internal pressure. Displacement and percentage change in ovality were measured in the intrados, crown, and extrados regions. The displacement in the intrados and extrados increased linearly with load. Allowable limit loads and ovality are suggested to avoid pipe rejection due to insufficient wall thickness. Mathematical and software results were compared to experimental results to optimize output.
Simulation of Secondary Flow in Lubrication Pipe with End Bends of an Aero En...IRJET Journal
1) The document simulates oil flow behavior in the pressure pipe line of an aero engine using computational fluid dynamics (CFD). It examines the flow characteristics at five sections between the inlet and outlet.
2) Secondary flow develops at the bended sections due to curvature effects. Dean vortices form and their locations are visualized. Velocity decreases around the inner curvature and increases around the outer curvature.
3) Pressure drops slightly from 5 bar at the inlet to 4.9 bar at the outlet due to the short pipe length. Higher pressure variations occur around the bends.
Design and Optimization of Axial Flow Compressorijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
EFFECT OF TIP CLEARANCE ON A CENTRIFUGAL COMPRESSORIAEME Publication
Computational analysis of low speed centrifugal compressor is carried out with finite volume method using ANSYS-CFX software. Centrifugal compressor impeller with three values of
clearances i.e., 0%, 2% and 5% of blade height at trailing edge are examined at five flow coefficients φ=0.28, 0.34, 0.42 (design value), 0.48 and 0.52. The effect of tip clearance on static pressure from inlet to outlet of the compressor is analyzed.
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 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.
This document summarizes a study that used computational fluid dynamics (CFD) to simulate the performance of a single-stage axial flow compressor with varying blade aspect ratios of 1, 2, and 3. The study found that compressor performance is affected by aspect ratio, with the best operating conditions occurring between ratios of 2 and 3. Streamline analyses were conducted to analyze pressure and velocity distributions within the compressor and determine how parameters like mach number varied across different aspect ratio configurations. Modal analyses were also performed to study frequency responses at different vibration modes.
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
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
This document summarizes a numerical analysis of the flow through a mixed flow compressor stage designed for a small gas turbine engine. The analysis found that the stage achieved a total pressure ratio of 4.3 and isentropic efficiency of 73.85% at its design speed, lower than the targeted values of 5 and 80% respectively. Reasons for the lower performance include higher than expected flow angles and Mach numbers at the impeller inlet causing shocks, as well as flow separation in the diffuser due to its high curvature. Modifications to the geometry are recommended to improve the stage's performance and stability.
Numerical analysis on effect of exit blade angle on cavitation in centrifuIAEME Publication
This document presents a numerical analysis of the effect of exit blade angle on cavitation in a centrifugal pump. A centrifugal pump test rig was modeled in Creo Parametric with impellers having different exit blade angles. Computational fluid dynamics simulations were performed in ANSYS CFX to analyze cavitation at various flow rates. The results show that higher exit blade angles experience more cavitation in the form of vapor formation. Pressure contours also indicate lower pressures develop at higher exit blade angles. Therefore, a centrifugal pump impeller with a lower exit blade angle is less susceptible to cavitation issues.
IRJET- Experimental Investigation of Flow through Perforated Plate in Conical...IRJET Journal
This document describes an experimental investigation of flow through a perforated plate inside a conical diffuser. The goal is to improve the axial flow and achieve higher static pressure rise without total pressure loss. A supersonic wind tunnel was used to test a conical diffuser with an angle of 7 degrees that had two perforated plates placed inside at a distance of 450mm from the inlet. Pressure values were measured using a manometer at various ports and the coefficient of pressure was calculated both without and with the perforated plates. The results found that the addition of the perforated plates improved the flow uniformity and increased the static pressure rise inside the diffuser compared to when no plates were used.
Comparative study of supersonic nozzleseSAT Journals
Abstract
In this experiment, comparative flow analysis of two different nozzles has been performed. The analysis has been performed according to the shape of the nozzles by keeping the same input parameters. The experiment has been carried out in two preliminary steps. First one includes modeling and CFD analysis and the later part is about comparing their different properties. For this analysis, two dimensional axisymmetric nozzle geometries were drawn in Solid Works and CFD analysis is done using Fluent. The basic difference between these two nozzle geometries is their outlet divergence angle, whereas the inlet cross-sectional area, throat cross-sectional area and nozzle length are exactly same. These two nozzle geometries were drawn having outlet divergence angle 10° and 20° respectively. Velocity, pressure and temperature distribution on both nozzles have been studied to take the final decision. From analysis, it is clearly observed that the nozzle having outlet divergence angle 20° gives higher exit velocity with Mach number of 5.62 whereas the nozzle with outlet divergence angle 10° gives an exit velocity with Mach number of 4.31. Besides, lower temperature distribution and lower pressure distribution were observed in the nozzle with outlet divergence angle 20° throughout the expansion zone and nozzle with outlet divergence angle 10° exhibits higher temperature and pressure throughout the expansion zone. As the nozzle with divergence angle 20° gives higher exit velocity, it is the better one between these two nozzles.
Keywords: Convergent-divergent nozzle, CFD, ANSYS Fluent, Outlet divergence angle, SolidWorks.
An Investigation on the Performance Characteristics of a Centrifugal CompressorIJERD Editor
The design and off-design performance characteristics of single stage centrifugal compressor
consisting of 12 vanes impeller interfacing with 11 vanes diffuser have been studied experimentally and
numerically. The impeller has been designed and developed with radial exit, 30o inlet blade angle (with
tangent), 77 mm diameter and the discharge volute considering constant mean flow velocity. The performance
of the compressor at varying capacity (60 to 120 % of design) by controlling the discharge valve and with the
variation of rotating speed (15000 to 35000 rpm) by regulating speed of the coupled gas turbine has been
conducted at the recently developed test rig. The numerical simulation has been done by adopting viscous
Reynolds Average Navier-Stokes (RANS) equations with and without Coriolis Force & Centrifugal Force in
rotating reference frame (impeller) and stationary reference frame (casing) respectively utilizing CFD software
Fluent 14. The flow around a single vane of impeller interfacing with single vane of diffuser, the rotational
periodicity and sliding mesh at the interfacing zone between rotating impeller and stationery diffuser are
considered. Non dimensional performance curves derived from experimental and numerical results are
presented and compared. The numerical results are found to match very closely with the experimented data near
the design point and deviation is observed at the both side of the designed operating point. Non-uniform
pressure profiles towards the impeller exit and strong cross flow from blade to blade are detected at low flow
operating conditions. Total pressure, static pressure and velocity distributions at design and off design
operation obtained from the CFD results are analysed and presented here.
Design and experimental investigations of pressureiaemedu
The document describes the design and experimental investigation of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. The atomizer nozzle was designed for an annular combustion chamber with a target spray cone angle of 30 degrees. Experimental testing of the nozzle was conducted to measure spray penetration length and spray cone angle. Accurately matching the spray penetration to the combustion chamber size and geometry is important for optimal engine performance and efficiency. The droplet diameter produced by the nozzle was also analyzed using scanning electron microscopy.
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy. The design and experimental work presented in this document aims to optimize atomization of the liquid fuel for improved combustion performance in the small gas turbine application.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. The nozzle is designed to produce a spray cone angle of 30 degrees for atomizing kerosene fuel. Details are provided on the design method and calculations used to determine the nozzle dimensions based on the operating parameters. An experimental setup is developed to measure the spray penetration length and cone angle of the nozzle. The droplet size of the spray is also measured using scanning electron microscopy. The designed nozzle and test setup provide a way to characterize the spray properties important for fuel atomization in gas turbine combustion systems.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy. The design and experimental work presented in this document aims to optimize engine performance by matching the nozzle spray properties to the combustion chamber geometry.
Wall static pressure distribution due to confined impinging circular air jeteSAT 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.
Increase in fatigue life of spur gear by introducing circular stress relievin...IAEME Publication
Increment of fatigue life of spur gear is the main target of this research. This work presents the possibilities of using the stress redistribution techniques by introducing the circular stress relieving features in the stressed zone to the advantage of reduction of root fillet stress in spur gear.
This document describes the design and optimization of an axial flow compressor. It discusses modeling the compressor in Pro/Engineer software with 30, 20, and 12 blades made from different materials. Structural and computational fluid dynamics (CFD) analyses were performed to analyze stress levels, velocity, pressure, and temperature. The results showed that a titanium alloy design with 12 blades had the lowest stress but highest outlet velocity and mass flow rate, making it the optimal design.
CFD Based Investigation on Effects of Compression Surface At Fighter Aircraft...IJERA Editor
The purpose of the intake of an aircraft is to supply the engine with a proper airflow during various flight conditions. A good intake design is characterized by providing high pressure recovery and low distortion. Therefore it is essential to divert as much of the boundary layer as possible since it is a factor which affect the quality of the airflow. On aircrafts with engines installed on wing pylons, which is the most common configuration on transport and passenger aircraft, the inlet is short and leads directly to the engine and the pressure recovery is good. For engines that are integrated with the body, for example on fighter aircrafts, the airflow is travelling along the body of the aircraft before it reaches the air intake. A boundary layer builds up along the body, something which is not desirable, especially in the part of the flow that supplies the engines. The pressure recovery is lower because of this, something that has a negative effect upon engine thrust. There are, however, ways to prevent the boundary layer from entering the inlet, or at least to minimize the amount that does. It is common to use a boundary layer diverter. It affects the aircraft performance in so many ways. So, it needs some other provision or technology to overcome intake problem in fighter crafts. In the present work, a well-designed compression surface is installed in the entry of the engine intake to redirect boundary layer and create shock wave for getting desired flow in the compressor (When a flow crosses a shock wave, its velocity got reduced, which in term increases pressure). The compression surface is placed at the entry of the diffuser to perform the above mentioned operation. The work extents to, a comparative investigation is proposed for with and without compression surface. ANSYS-Fluent is a commercial CFD code which will be used for performing the simulation and the simulation configuration contains two different Mach speeds (0.7 & 2) with three different angles of attacks (0°, 7.5° and 15°). The simulation results are evaluated to find out pressure recovery in the engine intake between with and without compression surface.
Submission Deadline: 30th September 2022
Acceptance Notification: Within Three Days’ time period
Online Publication: Within 24 Hrs. time Period
Expected Date of Dispatch of Printed Journal: 5th October 2022
MODELING AND ANALYSIS OF SURFACE ROUGHNESS AND WHITE LATER THICKNESS IN WIRE-...IAEME Publication
White layer thickness (WLT) formed and surface roughness in wire electric discharge turning (WEDT) of tungsten carbide composite has been made to model through response surface methodology (RSM). A Taguchi’s standard Design of experiments involving five input variables with three levels has been employed to establish a mathematical model between input parameters and responses. Percentage of cobalt content, spindle speed, Pulse on-time, wire feed and pulse off-time were changed during the experimental tests based on the Taguchi’s orthogonal array L27 (3^13). Analysis of variance (ANOVA) revealed that the mathematical models obtained can adequately describe performance within the parameters of the factors considered. There was a good agreement between the experimental and predicted values in this study.
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EFFECT OF TIP CLEARANCE ON A CENTRIFUGAL COMPRESSORIAEME Publication
Computational analysis of low speed centrifugal compressor is carried out with finite volume method using ANSYS-CFX software. Centrifugal compressor impeller with three values of
clearances i.e., 0%, 2% and 5% of blade height at trailing edge are examined at five flow coefficients φ=0.28, 0.34, 0.42 (design value), 0.48 and 0.52. The effect of tip clearance on static pressure from inlet to outlet of the compressor is analyzed.
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 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.
This document summarizes a study that used computational fluid dynamics (CFD) to simulate the performance of a single-stage axial flow compressor with varying blade aspect ratios of 1, 2, and 3. The study found that compressor performance is affected by aspect ratio, with the best operating conditions occurring between ratios of 2 and 3. Streamline analyses were conducted to analyze pressure and velocity distributions within the compressor and determine how parameters like mach number varied across different aspect ratio configurations. Modal analyses were also performed to study frequency responses at different vibration modes.
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
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
This document summarizes a numerical analysis of the flow through a mixed flow compressor stage designed for a small gas turbine engine. The analysis found that the stage achieved a total pressure ratio of 4.3 and isentropic efficiency of 73.85% at its design speed, lower than the targeted values of 5 and 80% respectively. Reasons for the lower performance include higher than expected flow angles and Mach numbers at the impeller inlet causing shocks, as well as flow separation in the diffuser due to its high curvature. Modifications to the geometry are recommended to improve the stage's performance and stability.
Numerical analysis on effect of exit blade angle on cavitation in centrifuIAEME Publication
This document presents a numerical analysis of the effect of exit blade angle on cavitation in a centrifugal pump. A centrifugal pump test rig was modeled in Creo Parametric with impellers having different exit blade angles. Computational fluid dynamics simulations were performed in ANSYS CFX to analyze cavitation at various flow rates. The results show that higher exit blade angles experience more cavitation in the form of vapor formation. Pressure contours also indicate lower pressures develop at higher exit blade angles. Therefore, a centrifugal pump impeller with a lower exit blade angle is less susceptible to cavitation issues.
IRJET- Experimental Investigation of Flow through Perforated Plate in Conical...IRJET Journal
This document describes an experimental investigation of flow through a perforated plate inside a conical diffuser. The goal is to improve the axial flow and achieve higher static pressure rise without total pressure loss. A supersonic wind tunnel was used to test a conical diffuser with an angle of 7 degrees that had two perforated plates placed inside at a distance of 450mm from the inlet. Pressure values were measured using a manometer at various ports and the coefficient of pressure was calculated both without and with the perforated plates. The results found that the addition of the perforated plates improved the flow uniformity and increased the static pressure rise inside the diffuser compared to when no plates were used.
Comparative study of supersonic nozzleseSAT Journals
Abstract
In this experiment, comparative flow analysis of two different nozzles has been performed. The analysis has been performed according to the shape of the nozzles by keeping the same input parameters. The experiment has been carried out in two preliminary steps. First one includes modeling and CFD analysis and the later part is about comparing their different properties. For this analysis, two dimensional axisymmetric nozzle geometries were drawn in Solid Works and CFD analysis is done using Fluent. The basic difference between these two nozzle geometries is their outlet divergence angle, whereas the inlet cross-sectional area, throat cross-sectional area and nozzle length are exactly same. These two nozzle geometries were drawn having outlet divergence angle 10° and 20° respectively. Velocity, pressure and temperature distribution on both nozzles have been studied to take the final decision. From analysis, it is clearly observed that the nozzle having outlet divergence angle 20° gives higher exit velocity with Mach number of 5.62 whereas the nozzle with outlet divergence angle 10° gives an exit velocity with Mach number of 4.31. Besides, lower temperature distribution and lower pressure distribution were observed in the nozzle with outlet divergence angle 20° throughout the expansion zone and nozzle with outlet divergence angle 10° exhibits higher temperature and pressure throughout the expansion zone. As the nozzle with divergence angle 20° gives higher exit velocity, it is the better one between these two nozzles.
Keywords: Convergent-divergent nozzle, CFD, ANSYS Fluent, Outlet divergence angle, SolidWorks.
An Investigation on the Performance Characteristics of a Centrifugal CompressorIJERD Editor
The design and off-design performance characteristics of single stage centrifugal compressor
consisting of 12 vanes impeller interfacing with 11 vanes diffuser have been studied experimentally and
numerically. The impeller has been designed and developed with radial exit, 30o inlet blade angle (with
tangent), 77 mm diameter and the discharge volute considering constant mean flow velocity. The performance
of the compressor at varying capacity (60 to 120 % of design) by controlling the discharge valve and with the
variation of rotating speed (15000 to 35000 rpm) by regulating speed of the coupled gas turbine has been
conducted at the recently developed test rig. The numerical simulation has been done by adopting viscous
Reynolds Average Navier-Stokes (RANS) equations with and without Coriolis Force & Centrifugal Force in
rotating reference frame (impeller) and stationary reference frame (casing) respectively utilizing CFD software
Fluent 14. The flow around a single vane of impeller interfacing with single vane of diffuser, the rotational
periodicity and sliding mesh at the interfacing zone between rotating impeller and stationery diffuser are
considered. Non dimensional performance curves derived from experimental and numerical results are
presented and compared. The numerical results are found to match very closely with the experimented data near
the design point and deviation is observed at the both side of the designed operating point. Non-uniform
pressure profiles towards the impeller exit and strong cross flow from blade to blade are detected at low flow
operating conditions. Total pressure, static pressure and velocity distributions at design and off design
operation obtained from the CFD results are analysed and presented here.
Design and experimental investigations of pressureiaemedu
The document describes the design and experimental investigation of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. The atomizer nozzle was designed for an annular combustion chamber with a target spray cone angle of 30 degrees. Experimental testing of the nozzle was conducted to measure spray penetration length and spray cone angle. Accurately matching the spray penetration to the combustion chamber size and geometry is important for optimal engine performance and efficiency. The droplet diameter produced by the nozzle was also analyzed using scanning electron microscopy.
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy. The design and experimental work presented in this document aims to optimize atomization of the liquid fuel for improved combustion performance in the small gas turbine application.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. The nozzle is designed to produce a spray cone angle of 30 degrees for atomizing kerosene fuel. Details are provided on the design method and calculations used to determine the nozzle dimensions based on the operating parameters. An experimental setup is developed to measure the spray penetration length and cone angle of the nozzle. The droplet size of the spray is also measured using scanning electron microscopy. The designed nozzle and test setup provide a way to characterize the spray properties important for fuel atomization in gas turbine combustion systems.
Design and experimental investigations of pressureiaemedu
This document describes the design and experimental testing of a pressure swirl atomizer nozzle for a 20 kW gas turbine engine. It details the design process for the nozzle, which is designed to produce a 30° spray cone angle for atomizing kerosene fuel. Experimental investigations are conducted to measure the spray penetration length and cone angle produced by the nozzle. A test setup is developed that allows for measurement of these spray characteristics, which are important parameters for combustion chamber design. The droplet size produced by the nozzle is also measured using scanning electron microscopy. The design and experimental work presented in this document aims to optimize engine performance by matching the nozzle spray properties to the combustion chamber geometry.
Wall static pressure distribution due to confined impinging circular air jeteSAT 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.
Increase in fatigue life of spur gear by introducing circular stress relievin...IAEME Publication
Increment of fatigue life of spur gear is the main target of this research. This work presents the possibilities of using the stress redistribution techniques by introducing the circular stress relieving features in the stressed zone to the advantage of reduction of root fillet stress in spur gear.
This document describes the design and optimization of an axial flow compressor. It discusses modeling the compressor in Pro/Engineer software with 30, 20, and 12 blades made from different materials. Structural and computational fluid dynamics (CFD) analyses were performed to analyze stress levels, velocity, pressure, and temperature. The results showed that a titanium alloy design with 12 blades had the lowest stress but highest outlet velocity and mass flow rate, making it the optimal design.
CFD Based Investigation on Effects of Compression Surface At Fighter Aircraft...IJERA Editor
The purpose of the intake of an aircraft is to supply the engine with a proper airflow during various flight conditions. A good intake design is characterized by providing high pressure recovery and low distortion. Therefore it is essential to divert as much of the boundary layer as possible since it is a factor which affect the quality of the airflow. On aircrafts with engines installed on wing pylons, which is the most common configuration on transport and passenger aircraft, the inlet is short and leads directly to the engine and the pressure recovery is good. For engines that are integrated with the body, for example on fighter aircrafts, the airflow is travelling along the body of the aircraft before it reaches the air intake. A boundary layer builds up along the body, something which is not desirable, especially in the part of the flow that supplies the engines. The pressure recovery is lower because of this, something that has a negative effect upon engine thrust. There are, however, ways to prevent the boundary layer from entering the inlet, or at least to minimize the amount that does. It is common to use a boundary layer diverter. It affects the aircraft performance in so many ways. So, it needs some other provision or technology to overcome intake problem in fighter crafts. In the present work, a well-designed compression surface is installed in the entry of the engine intake to redirect boundary layer and create shock wave for getting desired flow in the compressor (When a flow crosses a shock wave, its velocity got reduced, which in term increases pressure). The compression surface is placed at the entry of the diffuser to perform the above mentioned operation. The work extents to, a comparative investigation is proposed for with and without compression surface. ANSYS-Fluent is a commercial CFD code which will be used for performing the simulation and the simulation configuration contains two different Mach speeds (0.7 & 2) with three different angles of attacks (0°, 7.5° and 15°). The simulation results are evaluated to find out pressure recovery in the engine intake between with and without compression surface.
Similar to Computational analysis of centrifugal compressor with grooves on casing (20)
Submission Deadline: 30th September 2022
Acceptance Notification: Within Three Days’ time period
Online Publication: Within 24 Hrs. time Period
Expected Date of Dispatch of Printed Journal: 5th October 2022
MODELING AND ANALYSIS OF SURFACE ROUGHNESS AND WHITE LATER THICKNESS IN WIRE-...IAEME Publication
White layer thickness (WLT) formed and surface roughness in wire electric discharge turning (WEDT) of tungsten carbide composite has been made to model through response surface methodology (RSM). A Taguchi’s standard Design of experiments involving five input variables with three levels has been employed to establish a mathematical model between input parameters and responses. Percentage of cobalt content, spindle speed, Pulse on-time, wire feed and pulse off-time were changed during the experimental tests based on the Taguchi’s orthogonal array L27 (3^13). Analysis of variance (ANOVA) revealed that the mathematical models obtained can adequately describe performance within the parameters of the factors considered. There was a good agreement between the experimental and predicted values in this study.
A STUDY ON THE REASONS FOR TRANSGENDER TO BECOME ENTREPRENEURSIAEME Publication
The study explores the reasons for a transgender to become entrepreneurs. In this study transgender entrepreneur was taken as independent variable and reasons to become as dependent variable. Data were collected through a structured questionnaire containing a five point Likert Scale. The study examined the data of 30 transgender entrepreneurs in Salem Municipal Corporation of Tamil Nadu State, India. Simple Random sampling technique was used. Garrett Ranking Technique (Percentile Position, Mean Scores) was used as the analysis for the present study to identify the top 13 stimulus factors for establishment of trans entrepreneurial venture. Economic advancement of a nation is governed upon the upshot of a resolute entrepreneurial doings. The conception of entrepreneurship has stretched and materialized to the socially deflated uncharted sections of transgender community. Presently transgenders have smashed their stereotypes and are making recent headlines of achievements in various fields of our Indian society. The trans-community is gradually being observed in a new light and has been trying to achieve prospective growth in entrepreneurship. The findings of the research revealed that the optimistic changes are taking place to change affirmative societal outlook of the transgender for entrepreneurial ventureship. It also laid emphasis on other transgenders to renovate their traditional living. The paper also highlights that legislators, supervisory body should endorse an impartial canons and reforms in Tamil Nadu Transgender Welfare Board Association.
BROAD UNEXPOSED SKILLS OF TRANSGENDER ENTREPRENEURSIAEME Publication
Since ages gender difference is always a debatable theme whether caused by nature, evolution or environment. The birth of a transgender is dreadful not only for the child but also for their parents. The pain of living in the wrong physique and treated as second class victimized citizen is outrageous and fully harboured with vicious baseless negative scruples. For so long, social exclusion had perpetuated inequality and deprivation experiencing ingrained malign stigma and besieged victims of crime or violence across their life spans. They are pushed into the murky way of life with a source of eternal disgust, bereft sexual potency and perennial fear. Although they are highly visible but very little is known about them. The common public needs to comprehend the ravaged arrogance on these insensitive souls and assist in integrating them into the mainstream by offering equal opportunity, treat with humanity and respect their dignity. Entrepreneurship in the current age is endorsing the gender fairness movement. Unstable careers and economic inadequacy had inclined one of the gender variant people called Transgender to become entrepreneurs. These tiny budding entrepreneurs resulted in economic transition by means of employment, free from the clutches of stereotype jobs, raised standard of living and handful of financial empowerment. Besides all these inhibitions, they were able to witness a platform for skill set development that ignited them to enter into entrepreneurial domain. This paper epitomizes skill sets involved in trans-entrepreneurs of Thoothukudi Municipal Corporation of Tamil Nadu State and is a groundbreaking determination to sightsee various skills incorporated and the impact on entrepreneurship.
DETERMINANTS AFFECTING THE USER'S INTENTION TO USE MOBILE BANKING APPLICATIONSIAEME Publication
The banking and financial services industries are experiencing increased technology penetration. Among them, the banking industry has made technological advancements to better serve the general populace. The economy focused on transforming the banking sector's system into a cashless, paperless, and faceless one. The researcher wants to evaluate the user's intention for utilising a mobile banking application. The study also examines the variables affecting the user's behaviour intention when selecting specific applications for financial transactions. The researcher employed a well-structured questionnaire and a descriptive study methodology to gather the respondents' primary data utilising the snowball sampling technique. The study includes variables like performance expectations, effort expectations, social impact, enabling circumstances, and perceived risk. Each of the aforementioned variables has a major impact on how users utilise mobile banking applications. The outcome will assist the service provider in comprehending the user's history with mobile banking applications.
ANALYSE THE USER PREDILECTION ON GPAY AND PHONEPE FOR DIGITAL TRANSACTIONSIAEME Publication
Technology upgradation in banking sector took the economy to view that payment mode towards online transactions using mobile applications. This system enabled connectivity between banks, Merchant and user in a convenient mode. there are various applications used for online transactions such as Google pay, Paytm, freecharge, mobikiwi, oxygen, phonepe and so on and it also includes mobile banking applications. The study aimed at evaluating the predilection of the user in adopting digital transaction. The study is descriptive in nature. The researcher used random sample techniques to collect the data. The findings reveal that mobile applications differ with the quality of service rendered by Gpay and Phonepe. The researcher suggest the Phonepe application should focus on implementing the application should be user friendly interface and Gpay on motivating the users to feel the importance of request for money and modes of payments in the application.
VOICE BASED ATM FOR VISUALLY IMPAIRED USING ARDUINOIAEME Publication
The prototype of a voice-based ATM for visually impaired using Arduino is to help people who are blind. This uses RFID cards which contain users fingerprint encrypted on it and interacts with the users through voice commands. ATM operates when sensor detects the presence of one person in the cabin. After scanning the RFID card, it will ask to select the mode like –normal or blind. User can select the respective mode through voice input, if blind mode is selected the balance check or cash withdraw can be done through voice input. Normal mode procedure is same as the existing ATM.
IMPACT OF EMOTIONAL INTELLIGENCE ON HUMAN RESOURCE MANAGEMENT PRACTICES AMONG...IAEME Publication
There is increasing acceptability of emotional intelligence as a major factor in personality assessment and effective human resource management. Emotional intelligence as the ability to build capacity, empathize, co-operate, motivate and develop others cannot be divorced from both effective performance and human resource management systems. The human person is crucial in defining organizational leadership and fortunes in terms of challenges and opportunities and walking across both multinational and bilateral relationships. The growing complexity of the business world requires a great deal of self-confidence, integrity, communication, conflict and diversity management to keep the global enterprise within the paths of productivity and sustainability. Using the exploratory research design and 255 participants the result of this original study indicates strong positive correlation between emotional intelligence and effective human resource management. The paper offers suggestions on further studies between emotional intelligence and human capital development and recommends for conflict management as an integral part of effective human resource management.
VISUALISING AGING PARENTS & THEIR CLOSE CARERS LIFE JOURNEY IN AGING ECONOMYIAEME Publication
Our life journey, in general, is closely defined by the way we understand the meaning of why we coexist and deal with its challenges. As we develop the "inspiration economy", we could say that nearly all of the challenges we have faced are opportunities that help us to discover the rest of our journey. In this note paper, we explore how being faced with the opportunity of being a close carer for an aging parent with dementia brought intangible discoveries that changed our insight of the meaning of the rest of our life journey.
A STUDY ON THE IMPACT OF ORGANIZATIONAL CULTURE ON THE EFFECTIVENESS OF PERFO...IAEME Publication
The main objective of this study is to analyze the impact of aspects of Organizational Culture on the Effectiveness of the Performance Management System (PMS) in the Health Care Organization at Thanjavur. Organizational Culture and PMS play a crucial role in present-day organizations in achieving their objectives. PMS needs employees’ cooperation to achieve its intended objectives. Employees' cooperation depends upon the organization’s culture. The present study uses exploratory research to examine the relationship between the Organization's culture and the Effectiveness of the Performance Management System. The study uses a Structured Questionnaire to collect the primary data. For this study, Thirty-six non-clinical employees were selected from twelve randomly selected Health Care organizations at Thanjavur. Thirty-two fully completed questionnaires were received.
Living in 21st century in itself reminds all of us the necessity of police and its administration. As more and more we are entering into the modern society and culture, the more we require the services of the so called ‘Khaki Worthy’ men i.e., the police personnel. Whether we talk of Indian police or the other nation’s police, they all have the same recognition as they have in India. But as already mentioned, their services and requirements are different after the like 26th November, 2008 incidents, where they without saving their own lives has sacrificed themselves without any hitch and without caring about their respective family members and wards. In other words, they are like our heroes and mentors who can guide us from the darkness of fear, militancy, corruption and other dark sides of life and so on. Now the question arises, if Gandhi would have been alive today, what would have been his reaction/opinion to the police and its functioning? Would he have some thing different in his mind now what he had been in his mind before the partition or would he be going to start some Satyagraha in the form of some improvement in the functioning of the police administration? Really these questions or rather night mares can come to any one’s mind, when there is too much confusion is prevailing in our minds, when there is too much corruption in the society and when the polices working is also in the questioning because of one or the other case throughout the India. It is matter of great concern that we have to thing over our administration and our practical approach because the police personals are also like us, they are part and parcel of our society and among one of us, so why we all are pin pointing towards them.
A STUDY ON TALENT MANAGEMENT AND ITS IMPACT ON EMPLOYEE RETENTION IN SELECTED...IAEME Publication
The goal of this study was to see how talent management affected employee retention in the selected IT organizations in Chennai. The fundamental issue was the difficulty to attract, hire, and retain talented personnel who perform well and the gap between supply and demand of talent acquisition and retaining them within the firms. The study's main goals were to determine the impact of talent management on employee retention in IT companies in Chennai, investigate talent management strategies that IT companies could use to improve talent acquisition, performance management, career planning and formulate retention strategies that the IT firms could use. The respondents were given a structured close-ended questionnaire with the 5 Point Likert Scale as part of the study's quantitative research design. The target population consisted of 289 IT professionals. The questionnaires were distributed and collected by the researcher directly. The Statistical Package for Social Sciences (SPSS) was used to collect and analyse the questionnaire responses. Hypotheses that were formulated for the various areas of the study were tested using a variety of statistical tests. The key findings of the study suggested that talent management had an impact on employee retention. The studies also found that there is a clear link between the implementation of talent management and retention measures. Management should provide enough training and development for employees, clarify job responsibilities, provide adequate remuneration packages, and recognise employees for exceptional performance.
ATTRITION IN THE IT INDUSTRY DURING COVID-19 PANDEMIC: LINKING EMOTIONAL INTE...IAEME Publication
Globally, Millions of dollars were spent by the organizations for employing skilled Information Technology (IT) professionals. It is costly to replace unskilled employees with IT professionals possessing technical skills and competencies that aid in interconnecting the business processes. The organization’s employment tactics were forced to alter by globalization along with technological innovations as they consistently diminish to remain lean, outsource to concentrate on core competencies along with restructuring/reallocate personnel to gather efficiency. As other jobs, organizations or professions have become reasonably more appropriate in a shifting employment landscape, the above alterations trigger both involuntary as well as voluntary turnover. The employee view on jobs is also afflicted by the COVID-19 pandemic along with the employee-driven labour market. So, having effective strategies is necessary to tackle the withdrawal rate of employees. By associating Emotional Intelligence (EI) along with Talent Management (TM) in the IT industry, the rise in attrition rate was analyzed in this study. Only 303 respondents were collected out of 350 participants to whom questionnaires were distributed. From the employees of IT organizations located in Bangalore (India), the data were congregated. A simple random sampling methodology was employed to congregate data as of the respondents. Generating the hypothesis along with testing is eventuated. The effect of EI and TM along with regression analysis between TM and EI was analyzed. The outcomes indicated that employee and Organizational Performance (OP) were elevated by effective EI along with TM.
INFLUENCE OF TALENT MANAGEMENT PRACTICES ON ORGANIZATIONAL PERFORMANCE A STUD...IAEME Publication
By implementing talent management strategy, organizations would have the option to retain their skilled professionals while additionally working on their overall performance. It is the course of appropriately utilizing the ideal individuals, setting them up for future top positions, exploring and dealing with their performance, and holding them back from leaving the organization. It is employee performance that determines the success of every organization. The firm quickly obtains an upper hand over its rivals in the event that its employees having particular skills that cannot be duplicated by the competitors. Thus, firms are centred on creating successful talent management practices and processes to deal with the unique human resources. Firms are additionally endeavouring to keep their top/key staff since on the off chance that they leave; the whole store of information leaves the firm's hands. The study's objective was to determine the impact of talent management on organizational performance among the selected IT organizations in Chennai. The study recommends that talent management limitedly affects performance. On the off chance that this talent is appropriately management and implemented properly, organizations might benefit as much as possible from their maintained assets to support development and productivity, both monetarily and non-monetarily.
A STUDY OF VARIOUS TYPES OF LOANS OF SELECTED PUBLIC AND PRIVATE SECTOR BANKS...IAEME Publication
Banking regulations act of India, 1949 defines banking as “acceptance of deposits for the purpose of lending or investment from the public, repayment on demand or otherwise and withdrawable through cheques, drafts order or otherwise”, the major participants of the Indian financial system are commercial banks, the financial institution encompassing term lending institutions. Investments institutions, specialized financial institution and the state level development banks, non banking financial companies (NBFC) and other market intermediaries such has the stock brokers and money lenders are among the oldest of the certain variants of NBFC and the oldest market participants. The asset quality of banks is one of the most important indicators of their financial health. The Indian banking sector has been facing severe problems of increasing Non- Performing Assets (NPAs). The NPAs growth directly and indirectly affects the quality of assets and profitability of banks. It also shows the efficiency of banks credit risk management and the recovery effectiveness. NPA do not generate any income, whereas, the bank is required to make provisions for such as assets that why is a double edge weapon. This paper outlines the concept of quality of bank loans of different types like Housing, Agriculture and MSME loans in state Haryana of selected public and private sector banks. This study is highlighting problems associated with the role of commercial bank in financing Small and Medium Scale Enterprises (SME). The overall objective of the research was to assess the effect of the financing provisions existing for the setting up and operations of MSMEs in the country and to generate recommendations for more robust financing mechanisms for successful operation of the MSMEs, in turn understanding the impact of MSME loans on financial institutions due to NPA. There are many research conducted on the topic of Non- Performing Assets (NPA) Management, concerning particular bank, comparative study of public and private banks etc. In this paper the researcher is considering the aggregate data of selected public sector and private sector banks and attempts to compare the NPA of Housing, Agriculture and MSME loans in state Haryana of public and private sector banks. The tools used in the study are average and Anova test and variance. The findings reveal that NPA is common problem for both public and private sector banks and is associated with all types of loans either that is housing loans, agriculture loans and loans to SMES. NPAs of both public and private sector banks show the increasing trend. In 2010-11 GNPA of public and private sector were at same level it was 2% but after 2010-11 it increased in many fold and at present there is GNPA in some more than 15%. It shows the dark area of Indian banking sector.
EXPERIMENTAL STUDY OF MECHANICAL AND TRIBOLOGICAL RELATION OF NYLON/BaSO4 POL...IAEME Publication
An experiment conducted in this study found that BaSO4 changed Nylon 6's mechanical properties. By changing the weight ratios, BaSO4 was used to make Nylon 6. This Researcher looked into how hard Nylon-6/BaSO4 composites are and how well they wear. Experiments were done based on Taguchi design L9. Nylon-6/BaSO4 composites can be tested for their hardness number using a Rockwell hardness testing apparatus. On Nylon/BaSO4, the wear behavior was measured by a wear monitor, pinon-disc friction by varying reinforcement, sliding speed, and sliding distance, and the microstructure of the crack surfaces was observed by SEM. This study provides significant contributions to ultimate strength by increasing BaSO4 content up to 16% in the composites, and sliding speed contributes 72.45% to the wear rate
ROLE OF SOCIAL ENTREPRENEURSHIP IN RURAL DEVELOPMENT OF INDIA - PROBLEMS AND ...IAEME Publication
The majority of the population in India lives in villages. The village is the back bone of the country. Village or rural industries play an important role in the national economy, particularly in the rural development. Developing the rural economy is one of the key indicators towards a country’s success. Whether it be the need to look after the welfare of the farmers or invest in rural infrastructure, Governments have to ensure that rural development isn’t compromised. The economic development of our country largely depends on the progress of rural areas and the standard of living of rural masses. Village or rural industries play an important role in the national economy, particularly in the rural development. Rural entrepreneurship is based on stimulating local entrepreneurial talent and the subsequent growth of indigenous enterprises. It recognizes opportunity in the rural areas and accelerates a unique blend of resources either inside or outside of agriculture. Rural entrepreneurship brings an economic value to the rural sector by creating new methods of production, new markets, new products and generate employment opportunities thereby ensuring continuous rural development. Social Entrepreneurship has the direct and primary objective of serving the society along with the earning profits. So, social entrepreneurship is different from the economic entrepreneurship as its basic objective is not to earn profits but for providing innovative solutions to meet the society needs which are not taken care by majority of the entrepreneurs as they are in the business for profit making as a sole objective. So, the Social Entrepreneurs have the huge growth potential particularly in the developing countries like India where we have huge societal disparities in terms of the financial positions of the population. Still 22 percent of the Indian population is below the poverty line and also there is disparity among the rural & urban population in terms of families living under BPL. 25.7 percent of the rural population & 13.7 percent of the urban population is under BPL which clearly shows the disparity of the poor people in the rural and urban areas. The need to develop social entrepreneurship in agriculture is dictated by a large number of social problems. Such problems include low living standards, unemployment, and social tension. The reasons that led to the emergence of the practice of social entrepreneurship are the above factors. The research problem lays upon disclosing the importance of role of social entrepreneurship in rural development of India. The paper the tendencies of social entrepreneurship in India, to present successful examples of such business for providing recommendations how to improve situation in rural areas in terms of social entrepreneurship development. Indian government has made some steps towards development of social enterprises, social entrepreneurship, and social in- novation, but a lot remains to be improved.
OPTIMAL RECONFIGURATION OF POWER DISTRIBUTION RADIAL NETWORK USING HYBRID MET...IAEME Publication
Distribution system is a critical link between the electric power distributor and the consumers. Most of the distribution networks commonly used by the electric utility is the radial distribution network. However in this type of network, it has technical issues such as enormous power losses which affect the quality of the supply. Nowadays, the introduction of Distributed Generation (DG) units in the system help improve and support the voltage profile of the network as well as the performance of the system components through power loss mitigation. In this study network reconfiguration was done using two meta-heuristic algorithms Particle Swarm Optimization and Gravitational Search Algorithm (PSO-GSA) to enhance power quality and voltage profile in the system when simultaneously applied with the DG units. Backward/Forward Sweep Method was used in the load flow analysis and simulated using the MATLAB program. Five cases were considered in the Reconfiguration based on the contribution of DG units. The proposed method was tested using IEEE 33 bus system. Based on the results, there was a voltage profile improvement in the system from 0.9038 p.u. to 0.9594 p.u.. The integration of DG in the network also reduced power losses from 210.98 kW to 69.3963 kW. Simulated results are drawn to show the performance of each case.
APPLICATION OF FRUGAL APPROACH FOR PRODUCTIVITY IMPROVEMENT - A CASE STUDY OF...IAEME Publication
Manufacturing industries have witnessed an outburst in productivity. For productivity improvement manufacturing industries are taking various initiatives by using lean tools and techniques. However, in different manufacturing industries, frugal approach is applied in product design and services as a tool for improvement. Frugal approach contributed to prove less is more and seems indirectly contributing to improve productivity. Hence, there is need to understand status of frugal approach application in manufacturing industries. All manufacturing industries are trying hard and putting continuous efforts for competitive existence. For productivity improvements, manufacturing industries are coming up with different effective and efficient solutions in manufacturing processes and operations. To overcome current challenges, manufacturing industries have started using frugal approach in product design and services. For this study, methodology adopted with both primary and secondary sources of data. For primary source interview and observation technique is used and for secondary source review has done based on available literatures in website, printed magazines, manual etc. An attempt has made for understanding application of frugal approach with the study of manufacturing industry project. Manufacturing industry selected for this project study is Mahindra and Mahindra Ltd. This paper will help researcher to find the connections between the two concepts productivity improvement and frugal approach. This paper will help to understand significance of frugal approach for productivity improvement in manufacturing industry. This will also help to understand current scenario of frugal approach in manufacturing industry. In manufacturing industries various process are involved to deliver the final product. In the process of converting input in to output through manufacturing process productivity plays very critical role. Hence this study will help to evolve status of frugal approach in productivity improvement programme. The notion of frugal can be viewed as an approach towards productivity improvement in manufacturing industries.
A MULTIPLE – CHANNEL QUEUING MODELS ON FUZZY ENVIRONMENTIAEME Publication
In this paper, we investigated a queuing model of fuzzy environment-based a multiple channel queuing model (M/M/C) ( /FCFS) and study its performance under realistic conditions. It applies a nonagonal fuzzy number to analyse the relevant performance of a multiple channel queuing model (M/M/C) ( /FCFS). Based on the sub interval average ranking method for nonagonal fuzzy number, we convert fuzzy number to crisp one. Numerical results reveal that the efficiency of this method. Intuitively, the fuzzy environment adapts well to a multiple channel queuing models (M/M/C) ( /FCFS) are very well.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELgerogepatton
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
A SYSTEMATIC RISK ASSESSMENT APPROACH FOR SECURING THE SMART IRRIGATION SYSTEMSIJNSA Journal
The smart irrigation system represents an innovative approach to optimize water usage in agricultural and landscaping practices. The integration of cutting-edge technologies, including sensors, actuators, and data analysis, empowers this system to provide accurate monitoring and control of irrigation processes by leveraging real-time environmental conditions. The main objective of a smart irrigation system is to optimize water efficiency, minimize expenses, and foster the adoption of sustainable water management methods. This paper conducts a systematic risk assessment by exploring the key components/assets and their functionalities in the smart irrigation system. The crucial role of sensors in gathering data on soil moisture, weather patterns, and plant well-being is emphasized in this system. These sensors enable intelligent decision-making in irrigation scheduling and water distribution, leading to enhanced water efficiency and sustainable water management practices. Actuators enable automated control of irrigation devices, ensuring precise and targeted water delivery to plants. Additionally, the paper addresses the potential threat and vulnerabilities associated with smart irrigation systems. It discusses limitations of the system, such as power constraints and computational capabilities, and calculates the potential security risks. The paper suggests possible risk treatment methods for effective secure system operation. In conclusion, the paper emphasizes the significant benefits of implementing smart irrigation systems, including improved water conservation, increased crop yield, and reduced environmental impact. Additionally, based on the security analysis conducted, the paper recommends the implementation of countermeasures and security approaches to address vulnerabilities and ensure the integrity and reliability of the system. By incorporating these measures, smart irrigation technology can revolutionize water management practices in agriculture, promoting sustainability, resource efficiency, and safeguarding against potential security threats.