Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers

This study was carried out to investigate the loss mechanism of a blade with a harbor seal whisker structure on the trailing edge under different Mach numbers. The loss of high-pressure turbine blades with four different trailing edge geometries, including a prototype, an elliptical trailing edge (E...

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Autores principales:	Fengbo Wen, Yuxi Luo, Shuai Wang, Songtao Wang, Zhongqi Wang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	biomimetic trailing edge turbine blade Mach number energy loss shock wave General Works A
Acceso en línea:	https://doaj.org/article/68f66817adca4e1fb707529bfc78c6b8
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spelling	oai:doaj.org-article:68f66817adca4e1fb707529bfc78c6b82021-11-17T07:00:24ZNumerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers2296-598X10.3389/fenrg.2021.789246https://doaj.org/article/68f66817adca4e1fb707529bfc78c6b82021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenrg.2021.789246/fullhttps://doaj.org/toc/2296-598XThis study was carried out to investigate the loss mechanism of a blade with a harbor seal whisker structure on the trailing edge under different Mach numbers. The loss of high-pressure turbine blades with four different trailing edge geometries, including a prototype, an elliptical trailing edge (ETE), a sinusoidal trailing edge (STE), and a biomimetic trailing edge (BTE) at Mach numbers of 0.38–1.21 is studied. The delayed detached-eddy simulation method is used to predict the detailed flow of the four cascades. The result shows that, when the Mach number is less than 0.9, the BTE can effectively reduce the energy loss coefficient compared with the other three cases. As the Mach number increases, the three-dimensional characteristics of the wake behind the BTE weaken. The energy loss coefficient of the blade with the BTE is close to that of the blade with the ETE and STE when the Mach number is greater than 0.9. Besides this, by controlling the wake, the BTE can effectively suppress the dynamic movement of shock waves in the cascade at high Mach numbers.Fengbo WenYuxi LuoShuai WangSongtao WangZhongqi WangFrontiers Media S.A.articlebiomimetic trailing edgeturbine bladeMach numberenergy lossshock waveGeneral WorksAENFrontiers in Energy Research, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomimetic trailing edge turbine blade Mach number energy loss shock wave General Works A
spellingShingle	biomimetic trailing edge turbine blade Mach number energy loss shock wave General Works A Fengbo Wen Yuxi Luo Shuai Wang Songtao Wang Zhongqi Wang Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
description	This study was carried out to investigate the loss mechanism of a blade with a harbor seal whisker structure on the trailing edge under different Mach numbers. The loss of high-pressure turbine blades with four different trailing edge geometries, including a prototype, an elliptical trailing edge (ETE), a sinusoidal trailing edge (STE), and a biomimetic trailing edge (BTE) at Mach numbers of 0.38–1.21 is studied. The delayed detached-eddy simulation method is used to predict the detailed flow of the four cascades. The result shows that, when the Mach number is less than 0.9, the BTE can effectively reduce the energy loss coefficient compared with the other three cases. As the Mach number increases, the three-dimensional characteristics of the wake behind the BTE weaken. The energy loss coefficient of the blade with the BTE is close to that of the blade with the ETE and STE when the Mach number is greater than 0.9. Besides this, by controlling the wake, the BTE can effectively suppress the dynamic movement of shock waves in the cascade at high Mach numbers.
format	article
author	Fengbo Wen Yuxi Luo Shuai Wang Songtao Wang Zhongqi Wang
author_facet	Fengbo Wen Yuxi Luo Shuai Wang Songtao Wang Zhongqi Wang
author_sort	Fengbo Wen
title	Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
title_short	Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
title_full	Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
title_fullStr	Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
title_full_unstemmed	Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers
title_sort	numerical study on the biomimetic trailing edge of a turbine blade under a wide range of outlet mach numbers
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/68f66817adca4e1fb707529bfc78c6b8
work_keys_str_mv	AT fengbowen numericalstudyonthebiomimetictrailingedgeofaturbinebladeunderawiderangeofoutletmachnumbers AT yuxiluo numericalstudyonthebiomimetictrailingedgeofaturbinebladeunderawiderangeofoutletmachnumbers AT shuaiwang numericalstudyonthebiomimetictrailingedgeofaturbinebladeunderawiderangeofoutletmachnumbers AT songtaowang numericalstudyonthebiomimetictrailingedgeofaturbinebladeunderawiderangeofoutletmachnumbers AT zhongqiwang numericalstudyonthebiomimetictrailingedgeofaturbinebladeunderawiderangeofoutletmachnumbers
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Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers

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