通过数值方法研究了平板上由钝舵与单股喷流引起的超声速流耦合干扰的流场特性。以喷口距钝舵侧表面的距离为变化参数,根据流场特点,分为强耦合干扰和弱耦合干扰两种情况进行了研究。强耦合干扰时,喷流的弓形激波和分离激波直接撞击到钝舵侧表面,激波系的强逆压梯度又引起了钝舵侧表面边界层的大范围分离,在钝舵侧表面形成两个高压区。弱耦合干扰时,喷流引起的激波系并未直接撞击到钝舵,但喷流激波系与钝舵激波系相交。

Characteristics of coupling interaction of supersonic flow induced by a blunt fin and a single jet on a flat plate were investigated by numerical simulation in this paper. The strong interaction and weak interaction were investigated. In this investigation, the distance between nozzle exit and a side surface of the blunt fin was selected as major parameter. In strong interaction, shock waves including both separation shock wave and bow shock wave impinged directly on the side surface of the blunt fin. The strong negative pressure gradients of shocks result in large range separation of the boundary layer. Two high pressure zones formed on the side surface of the blunt fin. In weak interaction, shock waves induced by the single jet did not impinge directly on the blunt fin, but only intersected with shock waves of the blunt fin.