High-fidelity simulation of shock-wave/boundary layer interactions

Abstract. We perform direct numerical simulations of impinging shock-boundary layer interaction on a flat plate, in which the shock is not orthogonal to boundary flow. The analysis relies an idealized configuration, where spanwise flow component used introduce effect sweep angle between statistically two-dimensional and shock. A quantitative comparison carried out swept case corresponding unswept one, domain width examined. reveals that, while time-averaged characteristics are basically unaffected by choice width, spectral dynamics dramatically changes with it. For very narrow domains, pure two-dimensional, low-frequency can be detected, resembles oscillation case. present work also devoted compare performance Digital Filtering (DF) Recycling-Rescaling methods (RR) reaching equilibrium state for Direct Numerical Simulation (DNS) turbulent layer. performed two sets DNS supersonic hypersonic layers, based previous studies. It found overall, RR method most appropriate choice, quickly reach correct trend wall pressure fluctuations, whereas DF more capable obtain small deviations skin friction coefficient respect benchmark.