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 the recess and the pressure fluctuations in the wake behind it are studied at the Mach numbers of the incoming flow ranging from 2 to 8 and the laminar boundary layer. High-order difference schemes are used in the calculations.