An improvement on the theoretical model for the large-scale coherent structures in the outer region of a turbulent boundary layer

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	An improvement on the theoretical model for the large-scale coherent structures in the outer region of a turbulent boundary layer
	Lu LP(陆利蓬); Luo JS(罗纪生); Xiong ZM(熊忠民)
刊名	Progress in Natural Science
	1997
卷号	7 期号:2 页码:229-233
关键词	Turbulent Boundary Layer Large-Scale Coherent Structure Eddy Viscosity Three-Dimensional Wave
ISSN号	1002-0071
通讯作者	Lu, LP (reprint author), TIANJIN UNIV,DEPT MECH,TIANJIN 300072,PEOPLES R CHINA.
中文摘要	According to the experimental results, there exist large-scale coherent structures in the outer region of a turbulent boundary layer, which have been studied by many authors.As experimental results, Antonia (1990) showed the phase- aver aged streamlines and isovorticity lines of the large-scale coherent structures in a turbulent boundary layer for different Reynolds numbers. Based on the hydrodynamic stability theory, the 2-D theoretical model for the large-scale structures was proposed by Luo and Zhou, in which the eddy viscosity was defined as a complex function of the position in the normal direction. The theoretical results showed in ref. were in agreement with those in ref. However, there were two problems in the results. One is that in the experimental results, there were divergent focuses between two saddle points in the streamlines, but in the theoretical results, there were centers. The other is that the stretched parts of the isovorticity lines appear at the location of centers in the theoretical results, while in the experimental results they located somewhere between the focuses and saddle points. The reason is that the computations were based on a 2-D model.
类目[WOS]	Materials Science, Multidisciplinary ; Multidisciplinary Sciences
研究领域[WOS]	Materials Science ; Science & Technology - Other Topics
收录类别	SCI
语种	英语
WOS记录号	WOS:A1997WQ99000014
公开日期	2009-08-03 ; 2010-08-20
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/39050]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Lu LP,Luo JS,Xiong ZM. An improvement on the theoretical model for the large-scale coherent structures in the outer region of a turbulent boundary layer[J]. Progress in Natural Science,1997,7(2):229-233.
APA	Lu LP,Luo JS,&熊忠民.(1997).An improvement on the theoretical model for the large-scale coherent structures in the outer region of a turbulent boundary layer.Progress in Natural Science,7(2),229-233.
MLA	Lu LP,et al."An improvement on the theoretical model for the large-scale coherent structures in the outer region of a turbulent boundary layer".Progress in Natural Science 7.2(1997):229-233.