Numerical Study of Shock-Boundary Layer Interactions for Various Shock and Flow Conditions

摘要

Direct numerical simulation (DNS) and large-eddy simulation (LES) of shock-turbulent boundary layer interactions are conducted at Mach 2.7 for two different shock incidence angles. A seventh-order monotonicity preserving scheme is used for the spatial discretization of Euler terms in both DNS and LES equations. The DNS results show the unsteady and three-dimensional nature of the boundary layer separation. The effect of shock intensity on the shock-boundary layer interaction is shown to be significant in terms of length of the separation bubble and the rise in mean wall-pressure. There are, however, some similarities between the initial parts of the interaction region for the two shock intensities. The LES results with dynamic Smagorinsky model are shown to be close to those obtained by the DNS.