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报告编号	NASA-CR-3765, NAS 1.26:3765
来源ID	NTRS_Document_ID: 19840010503
	Experimental study of flow reattachment in a single-sided sudden expansion
	Westphal, R. V.; Johnston, J. P.; Eaton, J. K.
英文摘要	The reattachment of a fully turbulent, two dimensional, separated shear layer downstream of a single-sided sudden expansion in a planar duct flow was examined experimentally. The importance of changing the structure of the separated shear layer on the reattachment process itself was examined. For all cases, the Reynolds number based on step height was greater than 20,000, the expansion ratio was 5/3, and the inlet boundary layer was less than one-half step height in thickness. A crucially important phase was the development of a pulsed wall probe for measurement of skin friction in the reattachment region, thus providing an unambiguous definition of the reattachment length. Quantitative features of reattachment - including streamwise development of the mean and fluctuating velocity field, pressure rise, and skin friction - were found to be similar for all cases studied when scaled by the reattachment length. A definition of the reattachment zone is proposed.
英文关键词	DUCTED FLOW PLANAR STRUCTURES REATTACHED FLOW SHEAR LAYERS TURBULENT FLOW TWO DIMENSIONAL FLOW EXPANSION REYNOLDS NUMBER SKIN FRICTION
出版年	1984
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/19840010503
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/258991
推荐引用方式 GB/T 7714	Westphal, R. V.,Johnston, J. P.,Eaton, J. K.. Experimental study of flow reattachment in a single-sided sudden expansion,1984.