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Experimental investigation of unsteadiness in transonic shock boundary layer interaction

Benard, Emmanuel and Huang, Jui-Che and Raghunathan, Srinivasan Experimental investigation of unsteadiness in transonic shock boundary layer interaction. (2010) In: 45th AAAF Symposium of Applied Aerodynamics, 22-24 Mar 2010, Marseille, France .

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Official URL: http://www.aaafasso.fr/crbst_50.html

Abstract

Transonic shock wave/boundary layer interaction over a wall-mounted bump was investigated with specific focus on shock wave unsteadiness and identification of its source. A large separation bubble resulted of an interaction driven by a flow characterized by a peak Mach number of 1.365. Overall this particular type of transonic unsteadiness is characterized with low amplitude and relatively high frequency motion. Low frequency shock unsteadiness was optically estimated and matched spectral content of wall fluctuating pressure. A strong correlation between separation onset and reattachment zones suggested a model of bubble expansion/contraction at the reattachment point where upstream-traveling pressure waves are generated and cause the shock wave excursions.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to 3AF editor. The definitive version is available at http://www.aaafasso.fr/
Audience (conference):International conference proceedings
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Institution:Other partners > Queen's University Belfast (UNITED KINGDOM)
Other partners > University of Glasgow (UNITED KINGDOM)
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Deposited By: Emmanuel Benard

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