Film cooling performance in a low speed 1.5-stage turbine: effects of mainstream Reynolds number and turbulence

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	Film cooling performance in a low speed 1.5-stage turbine: effects of mainstream Reynolds number and turbulence
	Li, Guoqing 1; Zhu, Junqiang 1; Wang, Kai 1; Li, Haiwang 2; Zhang, Qian 3
刊名	HEAT AND MASS TRANSFER
	2015-06-01
卷号	51 期号:6 页码:795-805
英文摘要	The effects of mainstream Reynolds number and turbulence to film cooling performance were investigated experimentally and computationally under rotating conditions in a 1.5-stage turbine. The rotor of the turbine included 18 blades with chord of 124.3 mm and height of 99 mm. A film hole was set in the middle span of the rotor blade surface with injection angles of 28A degrees on the pressure side and 36A degrees on the suction side respectively. The Reynolds number based on the mainstream velocity of the turbine outlet and the chord length of the rotor blade varied from 1.9 x 10(5) to 2.1 x 10(5). Measurements were made at three different rotation speeds of 702, 737 and 800 rpm to keep the rotating number consistent at 0.0280 while the blowing ratio varied from 0.5 to 2.0. Air and CO2 worked as coolant to achieve the density ratio of 1.03 and 1.57, respectively. Computational investigation was performed using the hexahedral structured grids and k-epsilon turbulence model. Results showed that the film coverage and cooling effectiveness are enlarged while the film deflection is weakened as the mainstream Reynolds number increases. Furthermore, the mainstream turbulence plays a negative role in the film coverage and cooling effectiveness at lower blowing ratio on both the pressure side and suction side while it promotes the film reattachment at higher blowing ratio on the suction side.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Mechanics
研究领域[WOS]	Thermodynamics ; Mechanics
收录类别	SCI
语种	英语
WOS记录号	WOS:000354196400005
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98920]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Natl Key Lab Sci & Technol Aeroengines, Beijing 100191, Peoples R China 3.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Guoqing,Zhu, Junqiang,Wang, Kai,et al. Film cooling performance in a low speed 1.5-stage turbine: effects of mainstream Reynolds number and turbulence[J]. HEAT AND MASS TRANSFER,2015,51(6):795-805.
APA	Li, Guoqing,Zhu, Junqiang,Wang, Kai,Li, Haiwang,&Zhang, Qian.(2015).Film cooling performance in a low speed 1.5-stage turbine: effects of mainstream Reynolds number and turbulence.HEAT AND MASS TRANSFER,51(6),795-805.
MLA	Li, Guoqing,et al."Film cooling performance in a low speed 1.5-stage turbine: effects of mainstream Reynolds number and turbulence".HEAT AND MASS TRANSFER 51.6(2015):795-805.