Influence of blowing into the boundary layer on supersonic flow past an oscillating cone

The influence of blowing on the unsteady characteristics of a boundary layer is studied for the example of supersonic flow past a sharp cone oscillating about zero angle of attack. The problem of the interaction of the inviscid exterior flow with the laminar boundary layer is solved. It is shown that blowing proportional to the heat flux improves the damping of the oscillations of the cone. If the blowing anticipates the heat flux in phase this effect is strengthened.