Experiments on impingement heat transfer with film extraction flow on the leading edge of rotating blades

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	Experiments on impingement heat transfer with film extraction flow on the leading edge of rotating blades
	Deng, Hongwu 2; Gu, Zhenpeng 2; Zhu, Jianqin 1; Tao, Zhi 2
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2012-10-01
卷号	55 期号:21-22 页码:5425-5435
关键词	Impinging Film Heat transfer Transient experiment Rotation
英文摘要	A transient liquid crystal experiment was performed to study the heat transfer characteristic of impingement cooling with outflow film on the leading edge of turbine blades under rotating conditions. In the experiments, the angles between the jet direction and rotating shaft were 0 degrees, 30 degrees, and 45 degrees, respectively. The impinging jet Reynolds number, based on the diameter of the impingement hole, ranged from 2000 to 12,000. The rotation number Ro (Omega d/u) ranged from 0 to 0.278. The relative impingement distance was fixed at 2. The results showed that, due to the effect of rotation, the spreading rate of the jet flow was enhanced and the heat transfer was weakened for all Reynolds numbers. For the condition of Re = 4000 and Ro = 0.139 with corresponding angles theta = 0 degrees, 30 degrees,45 degrees, the Nusselt number of the stagnation point decreased by 33%, 30%, and 35%, respectively, compared to the stationary results. Furthermore, for the corresponding angles theta = 30 degrees and 45 degrees, the location of the stagnation point is offset 0.6d (jet impingement hole diameter) and 0.9d down, respectively, when Ro = 0.139. The average Nusselt numbers on the suction surface and the pressure surface both decreased with increased rotating speed. Moreover, the reduction of the average Nusselt number on the pressure surface was larger than that on the suction surface. At Ro = 0.139, the average Nusselt number on the suction surface decreased less than 10% for all three angles, while on the pressure surface, the decrease was almost 20% compared to the result for Ro = 0. (C) 2012 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Engineering ; Mechanics
关键词[WOS]	COOLANT EXTRACTION ; HEAT/MASS TRANSFER ; CONCAVE SURFACE ; JET ; REGIONS ; WALL ; HOLE
收录类别	SCI
语种	英语
WOS记录号	WOS:000308260900006
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/101525]
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.Beihang Univ, Sch Jet Prop, Natl Key Lab Sci & Technol Aeroengines, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Deng, Hongwu,Gu, Zhenpeng,Zhu, Jianqin,et al. Experiments on impingement heat transfer with film extraction flow on the leading edge of rotating blades[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2012,55(21-22):5425-5435.
APA	Deng, Hongwu,Gu, Zhenpeng,Zhu, Jianqin,&Tao, Zhi.(2012).Experiments on impingement heat transfer with film extraction flow on the leading edge of rotating blades.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,55(21-22),5425-5435.
MLA	Deng, Hongwu,et al."Experiments on impingement heat transfer with film extraction flow on the leading edge of rotating blades".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 55.21-22(2012):5425-5435.