Numerical simulation of pressure fluctuations on a plate behind a transverse recess in a supersonic flow

The flow around a flat transverse recess on a flat plate by a supersonic viscous gas flow is numerically simulated. The flow inside recess and the pressure fluctuations in the it near wake are investigated at the Mach numbers of the incoming flow from 2 to 8 and the laminar boundary layer. The calculations use high-order difference schemes.