CUED Publications database

Corner separation effects for normal shock wave/turbulent boundary layer interactions in rectangular channels

Burton, DMF and Babinsky, H (2012) Corner separation effects for normal shock wave/turbulent boundary layer interactions in rectangular channels. Journal of Fluid Mechanics, 707. pp. 287-306. ISSN 0022-1120

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Abstract

Experiments are conducted to examine the mechanisms behind the coupling between corner separation and separation away from the corner when holding a high-Machnumber M∞ = 1.5 normal shock in a rectangular channel. The ensuing shock wave interaction with the boundary layer on the wind tunnel floor and in the corners was studied using laser Doppler anemometry, Pitot probe traverses, pressure sensitive paint and flow visualization. The primary mechanism explaining the link between the corner separation size and the other areas of separation appears to be the generation of compression waves at the corner, which act to smear the adverse pressure gradient imposed upon other parts of the flow. Experimental results indicate that the alteration of the -region, which occurs in the supersonic portion of the shock wave/boundary layer interaction (SBLI), is more important than the generation of any blockage in the subsonic region downstream of the shock wave. © Copyright 2012 Cambridge University Press.

Item Type: Article
Uncontrolled Keywords: boundary layer separation high-speed flow shock waves
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 08 Dec 2014 02:37
DOI: 10.1017/jfm.2012.279