RECOVERY OF DISTORTED TURBULENT BOUNDARY-LAYER AND SHOCK SHOCK INTERACTION THROUGH RECOVERING BOUNDARY-LAYER/

The recovery of the turbulent boundary layer on a flat plate distorted by the reflection of the oblique shock wave, and the interaction betw een the reflected oblique shock system and the separation shock ahead oi the forward-facing step through the distorted boundary layer were i nvestigated both experimentally and numerically. As the increase in th e shock strength, the interaction becomes severe, causing the boundary layer separation, The shape factor of the turbulent boundary layer di storted by the oblique shock reflection recovers exponentially in the downstream direction. The interaction is roughly classified into three typical cases; In the first case, the separation shock is far downstr eam of the reflected oblique shock system, and they are almost indepen dent each other. In the second case, the separation shuck is blurred t o the compression wavelets due to the weakened boundary layer, and the reflected shock system remains almost unchanged. In the third case, t he separation shock occurs ahead of the reflected shock system, and me rges into the front leg of the reflected shock system.