Compressibility effects in turbulent boundary layers

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	Compressibility effects in turbulent boundary layers
	Cao Yu-Hui ; Pei Jie ; Chen Jun ; She Zhen-Su
刊名	chinese physics letters
	2008
关键词	CHANNEL FLOW VELOCITY DYNAMICS
英文摘要	Local cascade (LC) scheme and space-time correlations are used to study turbulent structures and their convection behaviour in the near-wall region of compressible boundary layers at Ma = 0.8 and 1.3. The convection velocities of fluctuating velocity components u (streamwise) and v (vertical) are investigated by statistically analysing scale-dependent ensembles of LC structures. The results suggest that u is convected with entropy perturbations while v with an isentropic process. An abnormal thin layer distinct from the conventional viscous sub-layer is discovered in the immediate vicinity of the wall (y(+) <= 1) in supersonic flows. While in the region 1 < y(+) < 30, streamwise streaks dominate velocity, density and temperature fluctuations, the abnormal thin layer is dominated by spanwise streaks in vertical velocity and density fluctuations, where pressure and density fluctuations are strongly correlated. The LC scheme is proven to be effective in studying the nature of supersonic flows and compressibility effects on wall-bounded motions.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000258916400059&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Physics, Multidisciplinary; SCI(E); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 5; ARTICLE; 9; 3315-3318; 25
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/316966]
专题	工学院
推荐引用方式 GB/T 7714	Cao Yu-Hui,Pei Jie,Chen Jun,et al. Compressibility effects in turbulent boundary layers[J]. chinese physics letters,2008.
APA	Cao Yu-Hui,Pei Jie,Chen Jun,&She Zhen-Su.(2008).Compressibility effects in turbulent boundary layers.chinese physics letters.
MLA	Cao Yu-Hui,et al."Compressibility effects in turbulent boundary layers".chinese physics letters (2008).