Coherent structures in the shock wave / boundary layer interaction zone: | development for a free flow in laminar or turbulent modes.
O.I. Vishnyakov, P.A. Polivanov, A.A. Sidorenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: shock wave / boundary layer interaction, flow separation, coherent structures in a boundary layer
Abstract
The paper presents characteristics of coherent structures that develop in the shock wave / boundary layer interaction zone. Experiments were performed on a flat plate for two options on the free flow: laminar and turbulent flow modes. The shock wave was generated by a wedge-type body placed ahead the plate. The data are obtained from hot-wire velocimetry technique. Flow structures in a boundary layer were studied using the coherence spectral analysis. It was demonstrated that the transversal size of coherent patterns varies insignificantly in the interaction zone between shock waves and boundary layer.
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