一种抑制激波-边界层相互作用的新型无源被动控制

摘要

为了探索一种抑制激波-边界层相互作用的新型无源、被动控制方法,采用有限体积法计算流体力学程序,分别对压缩拐角和激波入射平板两种典型流动的附面层分离进行了无源被动控制的数值研究.数值结果表明,新型无源被动控制方法消除了20°压缩拐角流动所产生的分离泡；对激波入射平板所诱导的附面层分离,采用的自适应无源控制方法可将分离区长度减小为无控制时的58％、总压恢复可比无控制时提高7.2％、x=0.85m截面最大回流速度较无控制时减小了69.3％.从而验证了无源被动抑制控制激波-边界层相互作用的可行性.%In order to explore a new-type passive control method to suppress shock-wave/boundary layer interac tions , passive controlling separation of two dimensional corner flow and shock impinging on flat plate were numerically simulated respectively with finite volume methods computational fluid dynamics code. The numerical results showed that the separation bubble of the two dimensional corner flow was eliminated completely with the passive method. For the separation induced by shock wave impinging on the flat plate, the separation bubble length was reduced to 58% , total pressure recovery coefficient increased 7.2% , and at x =85mm section the maximum velocity magnitude of in verse flow was reduced 69. 3% , in compared with the case without passive control applied. And the possibility of the passive control method in suppressing separation induced by shock-wave/boundary layer interaction was demonstrated.