Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling

To study the influence of different hole length ratios on the flow structure and film cooling efficiency, a calculation model of fan-shaped hole was constructed and numerically studied. The effect of different hole length ratios on the cooling efficiency under different blowing ratios was compared a...

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Autores principales:	Xun Zhou, Runxuan Qin, Le Cai
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	film cooling effectiveness fan-shaped hole adiabatic effectiveness heat transfer characteristics kidney-type vortices General Works A
Acceso en línea:	https://doaj.org/article/7ad52580e81a46798ca906194353277c
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spelling	oai:doaj.org-article:7ad52580e81a46798ca906194353277c2021-11-16T07:15:50ZResearch on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling2296-598X10.3389/fenrg.2021.784654https://doaj.org/article/7ad52580e81a46798ca906194353277c2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenrg.2021.784654/fullhttps://doaj.org/toc/2296-598XTo study the influence of different hole length ratios on the flow structure and film cooling efficiency, a calculation model of fan-shaped hole was constructed and numerically studied. The effect of different hole length ratios on the cooling efficiency under different blowing ratios was compared and analyzed. The results showed that as the blowing ratio increases, the overall average efficiency of most of the hole length ratio cases first increases and then decreases. Only in the case with a cylindrical part length/total length ratio of 0.5 did the efficiency continue to increase. When the blowing ratio is small, the spanwise average efficiency of each hole length ratio case is closer, but the flow structure and efficiency distribution are quite different. For the medium blowing ratio, the overall average efficiency of the small hole length ratio case is higher, and the efficiency decreases as the hole length ratio increases. When the cylindrical part length/total length ratio is further increased to 1, the cooling efficiency region basically converges into a spanwise narrow region. For larger blowing ratio conditions, after 10D after the hole outlet, the case with a cylindrical part length/total length of 0.5 is more efficient.Xun ZhouRunxuan QinLe CaiFrontiers Media S.A.articlefilm cooling effectivenessfan-shaped holeadiabatic effectivenessheat transfer characteristicskidney-type vorticesGeneral WorksAENFrontiers in Energy Research, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	film cooling effectiveness fan-shaped hole adiabatic effectiveness heat transfer characteristics kidney-type vortices General Works A
spellingShingle	film cooling effectiveness fan-shaped hole adiabatic effectiveness heat transfer characteristics kidney-type vortices General Works A Xun Zhou Runxuan Qin Le Cai Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
description	To study the influence of different hole length ratios on the flow structure and film cooling efficiency, a calculation model of fan-shaped hole was constructed and numerically studied. The effect of different hole length ratios on the cooling efficiency under different blowing ratios was compared and analyzed. The results showed that as the blowing ratio increases, the overall average efficiency of most of the hole length ratio cases first increases and then decreases. Only in the case with a cylindrical part length/total length ratio of 0.5 did the efficiency continue to increase. When the blowing ratio is small, the spanwise average efficiency of each hole length ratio case is closer, but the flow structure and efficiency distribution are quite different. For the medium blowing ratio, the overall average efficiency of the small hole length ratio case is higher, and the efficiency decreases as the hole length ratio increases. When the cylindrical part length/total length ratio is further increased to 1, the cooling efficiency region basically converges into a spanwise narrow region. For larger blowing ratio conditions, after 10D after the hole outlet, the case with a cylindrical part length/total length of 0.5 is more efficient.
format	article
author	Xun Zhou Runxuan Qin Le Cai
author_facet	Xun Zhou Runxuan Qin Le Cai
author_sort	Xun Zhou
title	Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
title_short	Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
title_full	Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
title_fullStr	Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
title_full_unstemmed	Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling
title_sort	research on the hole length ratio of fan-shaped holes in flat plate film cooling
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/7ad52580e81a46798ca906194353277c
work_keys_str_mv	AT xunzhou researchontheholelengthratiooffanshapedholesinflatplatefilmcooling AT runxuanqin researchontheholelengthratiooffanshapedholesinflatplatefilmcooling AT lecai researchontheholelengthratiooffanshapedholesinflatplatefilmcooling
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Research on the Hole Length Ratio of Fan-Shaped Holes in Flat Plate Film Cooling

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