Shock wave/turbulence boundary layer interaction control with the secondary recirculation jet in a supersonic flow

Abstract The separation induced by the shock wave/boundary layer interaction is not beneficial for the engine operation, and it should be mitigated by the active or passive control approaches. In the current study, the flow control induced by the secondary recirculation jet has been evaluated numerically, and this approach combines the boundary layer bleed and the boundary layer suction together. At the same time, the influences of the height and length of the recirculation channel, as well as the dimensions and positions of the bleed and suction slots, on the flow control efficiency have been analyzed in detail. The obtained results show that the potions of the bleed and suction slots have a great impact on the flow control efficiency, and the separation length would decrease when the suction slot is placed on the windward side of the separation zone, as well as the peak pressure along the bottom wall. The secondary shock wave system induced by the secondary recirculation jet is beneficial for the mixing augmentation in the supersonic flow. However, the dimensions of the bleed and suction slots only have a slight impact on the flow control efficiency, and these factors can be omitted in the design process of the shock wave/boundary layer interaction model.