Thermally driven unsteadiness of Shock Boundary Layer Interaction

Deficiencies still remain in understanding the unsteady behavior associated with interactions between shocks and turbulent boundary layer flow exposed to thermal variations caused by non-adiabatic wall conditions. The present study examines the effects of wall temperature on the dynamics of the unsteady separation bubble in a shock boundary layer interaction region at various Mach numbers. High order numerical simulations of a compression ramp are validated with existing experimental and numerical data at low Mach numbers, then various ratios of wall temperature to recovery temperature T_w/T_r are investigated for increasing Mach numbers. Analysis includes dynamic mode decomposition in order to examine the dynamic behavior of the shock-induced flow separation and any secondary flows which may exist. In order to minimize the imposition of any artificial correlations, a synthetic-turbulence inflow technique is used.