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TURBULENCE ENHANCEMENT BY FORCED SHOCK MOTION IN SHOCK-WAVE/TURBULENT BOUNDARY LAYER INTERACTION

Stefan Hickel
Institute of Aerodynamics and Fluid Mechanics Technische Universitat Munchen Boltzmannstr. 15, 85748 Garching bei Munchen, Germany; Chair of Computational Aerodynamics Faculty of Aerospace Engineering, TU Delft Kluyverweg 1, 2629 HS Delft, Netherlands

O.C. Petrache
Institute of Aerodynamics and Fluidmechanics Technische Universitat Munchen Boltzmannstrasse 15, 85747 Garching, Germany

Nikolaus A. Adams
Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Garching bei München, Germany

Sinopsis

We present Implicit Large-Eddy Simulations of a shock-wave/turbulent boundary layer interaction (SWTBLI) at Ma = 2.25 and Reδ = 51,552 with and without localized heat addition. The flow is complex and involves boundary layer separation under the adverse pressure gradient imposed by the shock, turbulence amplification across the interaction and low frequency oscillation of the reflected shock. For an entropy spot generated ahead of the shock, baroclinic vorticity production occurs when the resulting density peak passes the shock. The objective of the present study is to analyze the shock-separation interaction and turbulence structure of such a configuration. The effect of the addition of an entropy spot to the flow field is assessed in terms of turbulence amplification and turbulence mass flux.