Non-adiabatic flow characteristics of micro impeller

Non-adiabatic working condition is one of the major causes of performance deterioration in micro gas turbine engines. Complex micro scale geometry, low Reynolds number operating condition and high surface to volume ratio all lead to severe heat transfer. This paper first established a simple heat tr...

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Bibliografski detalji
Glavni autori: Qianwei Sun, Qiushi Li, Ali Arshad, Zhiping Li
Format: Članak
Jezik:English
Izdano: KeAi Communications Co., Ltd. 2014-03-01
Serija:Propulsion and Power Research
Teme:
Online pristup:http://www.sciencedirect.com/science/article/pii/S2212540X14000078
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author Qianwei Sun
Qiushi Li
Ali Arshad
Zhiping Li
author_facet Qianwei Sun
Qiushi Li
Ali Arshad
Zhiping Li
author_sort Qianwei Sun
collection DOAJ
description Non-adiabatic working condition is one of the major causes of performance deterioration in micro gas turbine engines. Complex micro scale geometry, low Reynolds number operating condition and high surface to volume ratio all lead to severe heat transfer. This paper first established a simple heat transfer model to determine appropriate non-adiabatic boundary condition for computational fluid dynamics (CFD) simulations. Isothermal wall temperature is identified as a heat transfer boundary based on model analysis in combination with material selection for pre-design of the engine and verified by the experiment carried out on directed structure applied in the model. A series of numerical simulations with adiabatic and non-adiabatic boundary conditions is then carried out to study the flow characteristics of high speed, low Reynolds number micro impeller. The physical nature for significant performance degradation related to flow behavior changes due to heat transfer effect is revealed by detailed analysis of typical flow features extracted from the comparative investigation. The result established the basis for heat transfer modeling of micro impeller purposing implications for design modification in order to attain high efficiency and better performance.
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spelling doaj.art-b51b2c06de6c44ebadb8dbb494937d2d2023-09-02T08:05:21ZengKeAi Communications Co., Ltd.Propulsion and Power Research2212-540X2014-03-01311810.1016/j.jppr.2014.01.006Non-adiabatic flow characteristics of micro impellerQianwei SunQiushi LiAli ArshadZhiping LiNon-adiabatic working condition is one of the major causes of performance deterioration in micro gas turbine engines. Complex micro scale geometry, low Reynolds number operating condition and high surface to volume ratio all lead to severe heat transfer. This paper first established a simple heat transfer model to determine appropriate non-adiabatic boundary condition for computational fluid dynamics (CFD) simulations. Isothermal wall temperature is identified as a heat transfer boundary based on model analysis in combination with material selection for pre-design of the engine and verified by the experiment carried out on directed structure applied in the model. A series of numerical simulations with adiabatic and non-adiabatic boundary conditions is then carried out to study the flow characteristics of high speed, low Reynolds number micro impeller. The physical nature for significant performance degradation related to flow behavior changes due to heat transfer effect is revealed by detailed analysis of typical flow features extracted from the comparative investigation. The result established the basis for heat transfer modeling of micro impeller purposing implications for design modification in order to attain high efficiency and better performance.http://www.sciencedirect.com/science/article/pii/S2212540X14000078Non-adiabaticMicro impellerRoot separationTip clearance flowSlip factor
spellingShingle Qianwei Sun
Qiushi Li
Ali Arshad
Zhiping Li
Non-adiabatic flow characteristics of micro impeller
Propulsion and Power Research
Non-adiabatic
Micro impeller
Root separation
Tip clearance flow
Slip factor
title Non-adiabatic flow characteristics of micro impeller
title_full Non-adiabatic flow characteristics of micro impeller
title_fullStr Non-adiabatic flow characteristics of micro impeller
title_full_unstemmed Non-adiabatic flow characteristics of micro impeller
title_short Non-adiabatic flow characteristics of micro impeller
title_sort non adiabatic flow characteristics of micro impeller
topic Non-adiabatic
Micro impeller
Root separation
Tip clearance flow
Slip factor
url http://www.sciencedirect.com/science/article/pii/S2212540X14000078
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AT qiushili nonadiabaticflowcharacteristicsofmicroimpeller
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AT zhipingli nonadiabaticflowcharacteristicsofmicroimpeller