Boundary Layer Dynamics in a Compressible Gas. Numerical Simulation

A theoretical analysis of laminar-turbulent transition in supersonic gas flow is performed basing on the results of direct numerical simulation of flow around a flat plate within the framework of Navier—Stokes equations. The similarity law of the burst formation frequency is confirmed. The spectral analysis of the flow indicates that it is the resonant three-wave interaction that is realized in the turbulent boundary layer. The effect of the plate temperature on gas flow turbulization and the spectral composition of pressure fluctuations is studied.