This document summarizes a computational fluid dynamics (CFD) analysis of an ejector system used in a gas turbine engine test bed. The CFD analysis examined the ejector's performance with and without a debris guard. Without the guard, reducing the back pressure was found to achieve "double choking" at 0.1 bar, maximizing the entrainment ratio. With the guard, there was an 8.56% total pressure loss and 15% reduction in mass flow. The CFD analysis determined the impact of a debris guard and varying back pressure on the ejector's entrainment ratio and pressure losses.
This work was aimed at developing a computational model following certain standards that are important to turbo machinery. Numerical and experimental investigations have been carried out on a two bladed savonius rotor by varying certain parameters of the turbine namely blade shape, blade profile, aspect ratio of the turbine and position of vent on the blade. For numerical investigation, commercial computational fluid dynamic (CFD) software ANSYS-FLUENT has been used. The results obtained have been validated with established experimental results. Investigations involving the variation of Aspect ratio have been done completely through experimentation. For the other cases, the obtained numerical results have been validated with the established experimental values. For the investigation regarding variation of blade shape, the length of semi minor axis has been changed and simulations have been carried out. Also, in the blade a vent has been introduced and its best position determined. Finally, new blade shapes have been designed and simulations carried out to find the optimum one. All these cases were computed at two different Reynolds number specifically 150000 and 80000. The new configurations gave better results than that for the conventional one.
Kaveri engine is an afterburning turbofan project developed by the GTRE, lab under DRDO, India. GTRE is now running two separate successor engine programmes, the K9+ and the K10. Click here to know more about kaveri Engine : http://www.drdo.gov.in/drdo/English/index.jsp?pg=Kaveri.jsp
Performance Analysis For Reaction Turbine – A Case StudyIJERA Editor
Performance test on a model of a Francis turbine has been carried out in the laboratory for various gate opening of the turbine. The parameters have been expressed in the term of unit quantities. The result show that the peak efficiency lies between 76% and 88% of the full load. The maximum efficiency and power obtained at Nu =362, whereas maximum efficiency obtained is 74% at 95% wicket gate opening, Predicted result based on the modal study for a prototype obtained is within the specified limit.
This work was aimed at developing a computational model following certain standards that are important to turbo machinery. Numerical and experimental investigations have been carried out on a two bladed savonius rotor by varying certain parameters of the turbine namely blade shape, blade profile, aspect ratio of the turbine and position of vent on the blade. For numerical investigation, commercial computational fluid dynamic (CFD) software ANSYS-FLUENT has been used. The results obtained have been validated with established experimental results. Investigations involving the variation of Aspect ratio have been done completely through experimentation. For the other cases, the obtained numerical results have been validated with the established experimental values. For the investigation regarding variation of blade shape, the length of semi minor axis has been changed and simulations have been carried out. Also, in the blade a vent has been introduced and its best position determined. Finally, new blade shapes have been designed and simulations carried out to find the optimum one. All these cases were computed at two different Reynolds number specifically 150000 and 80000. The new configurations gave better results than that for the conventional one.
Kaveri engine is an afterburning turbofan project developed by the GTRE, lab under DRDO, India. GTRE is now running two separate successor engine programmes, the K9+ and the K10. Click here to know more about kaveri Engine : http://www.drdo.gov.in/drdo/English/index.jsp?pg=Kaveri.jsp
Performance Analysis For Reaction Turbine – A Case StudyIJERA Editor
Performance test on a model of a Francis turbine has been carried out in the laboratory for various gate opening of the turbine. The parameters have been expressed in the term of unit quantities. The result show that the peak efficiency lies between 76% and 88% of the full load. The maximum efficiency and power obtained at Nu =362, whereas maximum efficiency obtained is 74% at 95% wicket gate opening, Predicted result based on the modal study for a prototype obtained is within the specified limit.
Finite Element Analysys of Axial Flow Turbine BladeIJMER
In this paper the finite element analysis of a Axial flow turbine bladefor a high tuned
design was carried out. The geometry was modelled in CATI A V5 R21 and finite element analysis had
been performed in AN SYS12 WB. FE analysis is was used to determine stress analysis at 15000rpm
modal analysis is at slung as well a s operating condition at 700F and low cycle fatigue analysis. After
performing the analysis, the safe working conditions for the axial flow turbine blade were also stated.
PERFORMANCES EVALUATION AND BLADE NUMBER OPTIMIZATION OF RADIAL INFLOW TURBINEIAEME Publication
The energy exhaust recovery in engines is obtained using turbochargers which are widely used in the automotive industry. A turbocharged engine leads to a better overall system efficiency and a reduction in exhaust emissions compared, at constant power, with a naturally aspirated engine. The numerical approach in the present work is to explore ways of improving the performances of the radial inflow turbine. This work investigates the performances of a radial inflow turbine under steady states conditions and how they are affected by the rotor geometry. The radial inflow turbine is investigated numerically using 3D Reynolds averaged Navier-Stokes equations, the objective hear is to determine the optimum of performance characteristics of the turbine. The building of the geometry and the generation of unstructured meshes are achieved using ANSYS-ICEM software whereas in order to simulate the flow, the ANSYS-CFX code is applied. The numerical method is also used to determine optimum geometrical characteristics such as the optimum of blade number. It has been found that the rotor with 12 blades gives better performances.
Philippe ANGLARET, the VP Business Development for Alstom Nuclear, presented the Turbine Island with its different characteristics and very impressive pictures.
Development of Hill Chart diagram for Francis turbine of Jhimruk Hydropower u...Suman Sapkota
The study is expected to provide a milestone for the study of performances of Francis Turbine at different loading conditions. It can also serve as a reference for the study of CFD analysis on Francis turbine for the development of performance characteristics curve and Hill chart.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Development of a 300 kWe Integrated Axial Turbine and Generator for ORC Appli...Keith D. Patch
2nd International Seminar on ORC Power Systems: Turbo Expanders II, Rotterdam, The Netherlands
Publisher: ASME, International Gas Turbine Institute (IGTI)
Abstract
Concepts NREC has completed its design and development of an integrated high speed axial turbine and permanent magnet generator. The Turbine –Generator Unit (TGU) is ideal for ORC applications for its compactness, reliability, and versatility. The 20,000 rpm TGU does not use a shaft seal or gearbox and the generator is evaporatively cooled using the ORC working fluid. The TGU is designed with the intent of having the same turbine housing and generator used with a range of operating ORC fluid operating pressures and temperatures to enable its wide spread use in a variety of ORC heat recovery applications. The rotor and nozzle stators are changed to aerodynamically optimize the performance of the turbine at different ORC fluid operating conditions and flow rates. The output voltage of the generator can range from 300 to 480 VAC and at 50 hz and 60 hz. This facilitates its use in waste heat recovery applications throughout the world. This technical paper will review the mechanical and electrical design features of the turbine-generator unit.
Finite Element Analysys of Axial Flow Turbine BladeIJMER
In this paper the finite element analysis of a Axial flow turbine bladefor a high tuned
design was carried out. The geometry was modelled in CATI A V5 R21 and finite element analysis had
been performed in AN SYS12 WB. FE analysis is was used to determine stress analysis at 15000rpm
modal analysis is at slung as well a s operating condition at 700F and low cycle fatigue analysis. After
performing the analysis, the safe working conditions for the axial flow turbine blade were also stated.
PERFORMANCES EVALUATION AND BLADE NUMBER OPTIMIZATION OF RADIAL INFLOW TURBINEIAEME Publication
The energy exhaust recovery in engines is obtained using turbochargers which are widely used in the automotive industry. A turbocharged engine leads to a better overall system efficiency and a reduction in exhaust emissions compared, at constant power, with a naturally aspirated engine. The numerical approach in the present work is to explore ways of improving the performances of the radial inflow turbine. This work investigates the performances of a radial inflow turbine under steady states conditions and how they are affected by the rotor geometry. The radial inflow turbine is investigated numerically using 3D Reynolds averaged Navier-Stokes equations, the objective hear is to determine the optimum of performance characteristics of the turbine. The building of the geometry and the generation of unstructured meshes are achieved using ANSYS-ICEM software whereas in order to simulate the flow, the ANSYS-CFX code is applied. The numerical method is also used to determine optimum geometrical characteristics such as the optimum of blade number. It has been found that the rotor with 12 blades gives better performances.
Philippe ANGLARET, the VP Business Development for Alstom Nuclear, presented the Turbine Island with its different characteristics and very impressive pictures.
Development of Hill Chart diagram for Francis turbine of Jhimruk Hydropower u...Suman Sapkota
The study is expected to provide a milestone for the study of performances of Francis Turbine at different loading conditions. It can also serve as a reference for the study of CFD analysis on Francis turbine for the development of performance characteristics curve and Hill chart.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Development of a 300 kWe Integrated Axial Turbine and Generator for ORC Appli...Keith D. Patch
2nd International Seminar on ORC Power Systems: Turbo Expanders II, Rotterdam, The Netherlands
Publisher: ASME, International Gas Turbine Institute (IGTI)
Abstract
Concepts NREC has completed its design and development of an integrated high speed axial turbine and permanent magnet generator. The Turbine –Generator Unit (TGU) is ideal for ORC applications for its compactness, reliability, and versatility. The 20,000 rpm TGU does not use a shaft seal or gearbox and the generator is evaporatively cooled using the ORC working fluid. The TGU is designed with the intent of having the same turbine housing and generator used with a range of operating ORC fluid operating pressures and temperatures to enable its wide spread use in a variety of ORC heat recovery applications. The rotor and nozzle stators are changed to aerodynamically optimize the performance of the turbine at different ORC fluid operating conditions and flow rates. The output voltage of the generator can range from 300 to 480 VAC and at 50 hz and 60 hz. This facilitates its use in waste heat recovery applications throughout the world. This technical paper will review the mechanical and electrical design features of the turbine-generator unit.
Make power out of your waste heat - Organic Rankine Cycle Sindhu Maiyya
How to utilize the waste heat generated by pretty much all the processes we engage in. An idea to convert the waste heat into useful power.
A presentation give in the finals of Schenider Electric Go Green in the City Challenge -2012
one of the renewable energy resources project that help me lot to my carrier in research field : this slide is for the prototype model that i design actual full scale size may be bit of different from my calculations and data's
Modeling of Gas Turbine Co-Propulsion Engine to Ecotourism Vessel for Improve...CSCJournals
Sailing speed isimportant an factor in choosing marine engines. The uses of gas turbine as co-propulsion engine forimproving sailing speed of ecotourism vessels to fulfill requirement of SAR operation. Gas turbine co-propulsion engine have an advantage of high power to weight ratio in comparative to other heat engines. This paper presents the results and study on diesel engine, simple cycle gas turbine and regenerative gas turbine performances The relation between the thermal efficiency of heat engine to fuel consumption is used to estimate fuel consumption rate. The design of heat engine can be determined the specific heat ratio and pressure ratio of the operation cycle which will give necessary impacts to the thermal efficiency of the heat engine. Results from the numerical calculation for the implementation of gas turbine will provide he decision support. The paper also discusses the impact of co-propulsion engine to the ships stability and proper power rating of gas turbine co-propulsion engine estimated by numerical calculation in order to achieve maximum sailing speed up to 35 knots.
Methods for assessing the technical condition of gas turbine engine (gte) bas...eSAT Journals
Abstract This paper deals with a method of diagnostics and focuses on the estimation of the depletion or exhaustion of service life of components of gas turbine engine. During operation of the gas turbine engine the critical components of the engine; blades, discs, shafts, wheels, gears, gearboxes and drive assemblies experience the action of centrifugal and gas forces that bring about tension, bending and turning moments. They also experience thermal loads of high intensity that has negative effect on the strength of the materials of the components. The strength of these components defines the reliability of the engine. The forces and thermal loads acting on the critical elements lead to the depletion of the service life of these elements. Hence the estimation of the remaining service life of gas turbine engine components. Keywords: Blades, critical components, damage, depletion, gas turbine engine, failure, service life, typical flight
This so called PPT for propulsion study for Shenyang Aerospace University. This PPT right protected by Dr. divinder K. Yadav. Its using in SAU by Lale. For all students of Aeronautical Engineering must memorize each & every words from this PPT. If you miss a single words you must fail in the Exam. Remember there is no chance to be creative or use sense you just need to use the power of memorizing.
CFD ANALYSIS IN AN EJECTOR OF GAS TURBINE ENGINE TEST BEDIAEME Publication
An Ejector system has been used to provide high mass flow to the aero-gas turbine engine in a ground test bed facility. CFD method has been used to determine the performance of the ejector with and without a debris guard. In the first case of flow analyses without debris guard in the ejector, the back pressure was reduced to an extent to know the entrainment ratio. It was found that a pressure of 0.1 bar is required to attain this condition called double choking of the ejector. Further analysis was carried out for a back pressure of 0.9 bar with debris guard. Total pressure loss of 8.56% was found across the debris guard. Also the mass flow through the ejector has reduced by 15% due to debris guard.
Numerical Investigation of Single Stage of an Axial Flow Compressor for Effec...IJERA Editor
In present work, a compressor configuration is taken from literature which will be studied for aspect ratio (ratio between length of blade to chord length) influence over performance. Performance in the sense is pressure ratio of compressor. The aspect ratio of the blade is an important parameter and has a strong influence on the performance of axial flow compressor. There are so many literatures available on influence of design parameters of axial flow compressor over its performance. Few literatures only are available for effects of aspect ratio of blade over performance of compressor. A study is proposed to be carried out to verify the effect of aspect ratio on the performance of single stage subsonic compressor through ANSYS-CFX software. The analysis will be carried out for the constant tip diameter of the compressor rotor blade having an aspect ratio 1, 2 and 3 and to obtain the pressure loss and flow parameters of the compressor stage. Further increase in aspect ratio will lead to structural problem of compressor. Therefore, there will be optimum aspect ratio between 2 and 3. Simulation will be conducted to aspect ratios of 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8 and 2.9 to find optimum ratio using ANSYS-CFX commercial CFD software.
This paper deals with the numerical analysis of 3d model which has inlet port diameter 46mm,valve diameter 43mm and the length and diameter of the cy linder is 562mm and 93.65mm respectively which is developed to study the effect of valve lif t on the flow of fluid inside the cylinder. For different valve lifts velocity will change inside t he cylinder. Results of CFD simulation indicated th at valve lift affects velocity flow field inside the c ylinder. It also proved that CFD is a convenient to ol for designing and optimizing the flow field in the engine.
Study of Velocity and Pressure Distribution Characteristics Inside Of Catalyt...ijceronline
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.
Study of Velocity and Pressure Distribution Characteristics Inside Of Catalyt...ijceronline
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.
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.
Flow Modification over Rotor Blade with Suction Boundary Layer Control TechniqueIJERA Editor
The efficiency of transonic aircraft engines depend upon the performance of compressor rotor. To increase
compressor rotors performance flow separation around rotor blades must be delayed and controlled. The aim
was to control the flow separation of blades using suction boundary layer control method.
Rotor blade has been modelled in designing software CATIA and then a suction surface has been created on
blade and then import these geometries to ANSYS-CFX 14.5 for computational analysis of flow around blades.
Suction slot has been applied at the trailing edge of suction surface and Shear stress transport model has been
used for computational analysis.
Two different suction mass flow rates 1 kg/s and 1.5 kg/s have been used here and boundary layer separation
effects have been changed and this could be readily seen that the velocity vectors have reattached, preventing
the boundary layer separation at the suction surface of the blade.
This presentation is the extension of the first presentation of the same title. It describes the design, mathematically equation, PDF table generation for combustion, simulation, and results of it.
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
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GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
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Bob Boule
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Figure 1 shows the components of a typical ejector system. A high pressure fluid is passed through primary duct
which has a convergent divergent nozzle. This high velocity, low static pressure jet induces a secondary flow from the
secondary duct which is open to the atmosphere and accelerates it in the direction of driving jet. The primary high
pressure fluid and sucked secondary air flow combine in the mixing duct, which is generally a constant area duct. The
kinetic energy of mixed flow is reduced in the diffuser located at end of mixing duct. This high mass flow enters the
engine via a bellmouth located after diffuser.
Fig 1: Ejector Layout
Keenan and Neumann [1] have explained the basic concept of ejector based on 1-D analytical approach. BJ
Huang et al [2] explained the effect of back pressure on the entrainment ratio. It is found that the ejector performs better
at critical mode in order to obtain a better efficiency. A critical mode in ejector is obtained when the primary and
entrained flow is choked and entrainment ratio becomes constant. At sub critical mode only primary flow is choked and
entrainment ratio by changing back pressure. T Sriveerakul [3] in his paper has explained the ejector performance by
varying the primary fluid properties and geometries.
Wojciech Sobieski [4] has studied the ejector flow using numerical modelling by using commercial code Fluent
with various turbulence models and compared the results with the experiments. S Gurulingam [5] has also used
numerical method to determine performance of ejector using irreversibility characteristics. He increased the efficiency of
ejector by reducing the losses based on minimization of entropy method. This is achieved by forcing the propelled steam
through a blower.
Jocob Kenneth Cornman [6] has published the CFD optimization of small gas ejectors used in navy diving
system. Optimization of small gas ejector is typically carried out by selecting single set of operating conditions and
optimizing the geometry for the specified condition. Pierre van Eeden et al [7] have derived the correlation for ejector
efficiency with an accuracy of ±2% using commercial CFD simulation software.
The objectives of present study is to predict the behaviour of flow and mixing process in the ejector of the gas
turbine engine ground test bed using with and without debris guard in the ejector. The CFD analysis has been carried out
using a commercial CFD package ANSYS FLUENT [8]. The entrainment ratio and pressure drop across the debris guard
of the ejector with varying back pressure of ejector has been determined.
2. EJECTOR CONFIGURATION
Figure 2 shows the ejector configuration considered for the present analysis.
Fig.2: Ejector Geometry
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This configuration has primary and secondary duct. The primary duct has a convergent divergent nozzle. The
other components of the ejector are constant area mixing duct, diffuser, straight duct and the intake duct of engine.
3. COMPUTATIONAL DETAILS
3.1 Grid generation
A 3D hybrid (combination of structured and unstructured) grid of six million elements is generated using
GAMBIT software [9], pre-processor of the ANSYS FLUENT software. While generating the grid, it is ensured that the
aspect ratio and skewness are in the required range. The aspect ratio is in the range of 5 to 60 and skewness is found to be
in the range of 0.01 to 0.9 (skewness close to 1 indicates bad grid quality). The skewness of 0.9 is found near the
convergent region of nozzle due to large convergent angle. Figure 3 shows the cross sectional view of the computational
grid of the ejector. The exploded view of the grid near the convergent divergent nozzle is shown in Figure 4.
Fig 3: Grid of the Ejector
Fig 4: Close View of the Grid Near the Nozzle
3.2 Boundary conditions
The boundary conditions used for the ejector configuration are as follow:-
Primary duct inlet : Total pressure and supersonic gauge pressure is specified at the primary inlet ,along with
total temperature and hydraulic diameter
Secondary duct inlet : Total pressure and supersonic gauge pressure is specified at the secondary inlet along with
total temperature and hydraulic diameter
Outlet: Static pressure and temperature are specified at the outlet of ejector.
Wall: All faces enclosing the flow are defined as walls. Adiabatic no-slip boundary condition has been applied.
The computations for the fluid flow in the ejector were performed using the commercial solver ANSYS
FLUENT 14.5. A 3-Dimensional compressible N-S equation mode of computer code has been used. Realizable k-
turbulence model combined with standard wall function has been chosen.
The grid has been chosen based on the grid independence studies performed using grids with 4.2, 6 and 7.8
million cells. The fluid is considered to be compressible. To reduce the numerical errors, a second order volume
discretization scheme was used. The SIMPLE algorithm was used for pressure-velocity coupling in the computations. All
predicted quantities were steady state. The minimum convergence criteria for the continuity equation, velocity and
turbulence quantities are 10–6. The outlet pressures as well as the mass flow rate at the outlet of the ejector section were
carefully monitored as the computation convergence criteria.
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3.3 Debris guard
Debris guard is a perforated hemispherical component which is located ahead of the intake duct of engine. The
air passes through this mesh like structure. This mesh is considered as porous material to carry out flow analysis in the
ejector. The porosity of the debris guard is found to be 0.8. The porous model of the FLUENT computer code is used to
simulate the debris guard. The inertial resistance and viscous resistance used to simulate the porous model is tabulated in
Table 1.
Table 1: Inertial resistance and viscous resistance
Inertial resistance viscous resistance
Direction 1 3.4 2.238. 10 -5
Direction 2 34000 2.238. 10 -5
Direction 3 34000 2.238. 10 -5
4. PROCEDURE AND CALCULATION
In the present study, the ejector analysis has been carried out in two parts
Case I: Ejector without debris guard: There are four analyses carried out by varying outlet pressure of the ejector as
shown in Table 2.
Table -2: Input Data
Primary inlet Secondary inlet Outlet
Case I
P0, bar T0, K P0,Bar T0, K P, Bar T0, K
I) 10 411 0.9098 300 0.9 300
ii) 10 411 0.9098 300 0.6 300
iii) 10 411 0.9098 300 0.3 300
iv) 10 411 0.9098 300 0.1 300
Case II: Ejector with debris guard
Ejector flow analysis has been carried out for one operating condition as given in Table 3.
Table -3: Input data
Primary inlet Secondary inlet outlet
Case II
P0, bar T0, K P0,Bar Case II P0, bar T0, K
I) 10 411 0.9098 I) 10 411
The following performance parameters have been determined from the analyses.
4.1 Primary flow through nozzle
For a given inlet stagnant pressure Pg and temperature Tg, the mass flow through the nozzle at choking condition
is given by the following gas dynamic equation
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The above equation gives the mass flow passing through primary duct.
4.2 Total pressure loss
Total pressure loss across debris guard is calculated by following formula
Back pressure 0.9 bar
Back pressure 0.6 bar
Back pressure 0.3 bar
Back pressure 0.1 bar
105
…………. (2)
4.3 Entrainment ratio (E.R)
Entrainment ratio is defined as ratio of primary mass flow rate to the secondary mass flow rate.
ER = M (PRY.DUCT)/ M(SEC.DUCT) ...................(3)
5. RESULTS AND DISCUSSION
5.1 Ejector flow analysis – CASE I
The ejector analyses have been carried out for a fixed primary inlet pressure and varying the outlet back
pressure. Figure 5 shows the Mach number distribution in Case I (a) to (d). It can be observed that the flow in the
Convergent-divergent nozzle accelerates to Mach number of 3.1. The secondary air flow mixes with the primary air in
the mixing and straight ducts. The exit Mach number increases as the back pressure has been reduced. It attains a Mach
number of 0.4, 0.65, 0.8 and 1.0 respectively.
It can be observed that the Mach number at the convergent divergent nozzle and the ejector exit region have
Mach number more than 1.0 in Case-I(d) condition. This is a special case of double choking found in the ejector. The
entrainment of the secondary mass flow rate cannot be increased beyond this back pressure.
Mach
Fig 5: Mach number distribution for Case I Condition
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The static pressure distribution in all four cases has been shown in Figure 6 (a to d) for all the cases.
106
Static
pressure
(N/m2)
a) Back pressure 0.9 bar
b) Back pressure 0.6 bar
c) Back pressure 0.3 bar
d) Back pressure 0.1 bar
Fig 6: Static pressure distribution for case i
Table 4 shows the mass flows determined for all four conditions. It can be observed that the mass flow rate at
the exit of ejector has been decreasing.
Table 4: Mass flows in ejector-case I
Back pressure, bar Primary mass flow rate, kg/s Secondary mass flow rate, kg/s Outlet mass flow rate kg/s
0.9 18.01 45.41 63.42
0.6 18.01 56.29 74.3
0.3 18.01 60.01 78.01
0.1 18.01 62.53 81.46
Table 5 shows the entrainment ratio determined for the above conditions.
Table 5: Entrainment ratio
Back pressure, bar Entrainment ratio
0.9 0.40
0.6 0.32
0.3 0.30
0.1 0.29
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5.2 Ejector flow analysis with debris guard CASE II
The ejector with debris guard condition is analysed by treating debris guard as porous material and appying
suitable porous model across debris guard
Figure 7 shows the Mach number distribution in Case II. It can be observed that the convergent divergent nozzle
exit plane has a Mach number of 3.1. Figure 8 and 9 show the static pressure and total pressure distribution along the
ejector. It can be seen that there is a large difference in total pressure near the debris guard. The flow faces an obstruction
of debris guard and hence velocity vectors reduce at the exit plane of duct.
Mach
Fig 7: Mach number distribution for case II condition
Static pressure (N/m2)
Fig 8: Static pressure distribution for
Case II
Total Pressure (N/m2)
Fig 9: Total pressure distribution for case II
Mass flows passing through the ejector is shown in Table 6. As compared to the mass flows in Table 4, the
secondary mass flow has become less for a constant primary flow of 18.01 kg/s. The secondary mass flows have
decreased from 45.41 kg/s to 36.07 kg/s.
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Table 6: Mass flows in ejector Case II
Back
pressure, bar
Primary
mass
flow, kg/s
Secondary
mass flow
(kg/s)
Outlet,
Kg/s
0.9 18.01 36.07 54.08
Table 7 shows the mass flow entrainment and the total pressure loss across the debris guard. The entrainment
ratio has become 0.5 from 0.4.
Table 7: Entrainment ratio
Back pressure, bar Entrainment ratio Pressure loss (%)
0.9 0.50 8.56
6. CONCLUSIONS
In the present study, the ejector flow analyses have been carried out with and wihtout debris guard using
ANSYS FLUENT software. The ejector flow without debris guard has been analysed for four back pressures to
determine the double choking condition of the ejector.
The ejector flow with debris guard has been analysed using porous model approach. It was found that the
entrainment ratio has increased for the case with debris guard as compared to case wihtout debris guard for the back
presuure of 0.9 bar. There is a total pressure loss of 8.56% found due to the debris guard which reduces the ejector mass
flow from 45.41 kg/s to 36.07 kg/s.
ACKNOWLEDGEMENT
The authors would like to thank Dr. C P Ramanarayanan, Director, GTRE, Bangalore for giving permission to
publish the paper. The authors acknowledge the help rendered by Mr. Gaarthick and Mr. Sanjay, Apprentices for creating
the model and grid of the geometry.
REFERENCES
[1] Keenan J.H. and Neuman, “An investigation of ejector design by anlysis and experiment” Massachusetts
institute of technology,1948.
[2] B.J Huang, J.M. Chang, C.P Wang, “1-D analysis of ejector performance” International Journal of
Refrigeration 22 (1999) 354-364.
[3] T. Sriveerakul, S. Aphornratana, K. Chunnanond, “Flow structure of steam ejector influenced by operating
pressure and geometries” International Journal of Thermal Science 46, (2007) 823-833.
[4] Wojciech Sobieski, “Performance of air-air ejector,an attempt at numerical modeling” TASK QUARTERLY- 7
No 3, (2003) 449-457.
[5] S.Gurulingam, A.Kaisselvane, N.Algumurthy. “Numerical study of performance improvement of jet ejector”
IJERA, vol.2 December 2012, pp 1650-1653.
[6] Jocob Kenneth Corman, “Optimization of small gas ejector used in navy diving system” Duke university,2012.
[7] Pierre van Eeden and Dario Ercolani, “A method for prediction of gas/gas ejector performance” Impiantistica
Italiana, 2013.
[8] Fluent User’s Guide, v. 14.5, 2013
[9] Gambit User’s Guide V. 2.4.6, 2008