Abstract
The interaction between an incident shock wave and a turbulent boundary layer at Mach 2.1 is investigated using particle image velocity in combination with data processing using the proper orthogonal decomposition. The interaction is found to instantaneously exhibit a two-layer structure, characterized by a relatively high-velocity outer layer, and a low-velocity inner layer. Discrete vortical structures are prevalent at their interface, which appear to play a role in the interaction between the two layers. Low-order eigenmodes from the analysis show an energetic association between the incoming boundary layer, separated flow region, and reflected shock wave. Higher-order eigenmodes show subspace bifurcations leading to smaller-scale features, which are required to properly represent the flow. The subspace features contained in the eigenmodes appear to represent the phenomenology observed in the instantaneous realizations.
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This work is supported by the Dutch Technology Foundation STW under the VIDI – Innovation Impulse program, grant DLR.6198.
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Humble, R., Scarano, F., Oudheusden, B. (2009). Unsteady Flow Organization of a Shock Wave/Turbulent Boundary Layer Interaction. In: Braza, M., Hourigan, K. (eds) IUTAM Symposium on Unsteady Separated Flows and their Control. IUTAM Bookseries, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9898-7_27
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DOI: https://doi.org/10.1007/978-1-4020-9898-7_27
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