Direct Numerical Simulation of a Reflected-Shock-Wave/Turbulent-Boundary-Layer Interaction

A direct numerical simulation of a reflected-shock-wave/turbulent-boundary-layer interaction at Mach 2.9 and Re-theta = 2300 with a How deflection through the incident shock of 12 deg is presented. A modified weighted essentially nonoscillatory method is used for the spatial discretization of the inviscid fluxes. The numerical scheme has previously been validated in the direct numerical simulation of a compression-ramp interaction against experiments at matching conditions. The flowfield for the present simulation is visualized using a numerical schlieren technique, and a movie of the flow reveals the unsteady shock motion. From the wall-pressure signal in the interaction region and pressure measurements in the freestream, the characteristic low frequency of the shock motion is inferred and found to agree with a scaling previously proposed. The evolution of the mean and fluctuating flow quantities through the interaction is studied. It is observed that the turbulence levels are greatly amplified in the downstream flow and that significant departures from the strong Reynolds analogy occur.