用数值方法模拟了超声速弹体级间分离流场 ,给出了不同级间距离时几种典型的流场结构 ,两类典型的流态与实验观察一致。级间距离较小时 ,级间区为死水区 ,前体阻力为负 ,出现典型的“后体效应”现象 ;距离较大时 ,内外流之间出现很复杂的干扰波系 ,一定的分离距离后 ,后体前缘分离流动区前出现正激波 ,后体的干扰基本被隔绝。 Numerical simulation of the supersonic projectile interstage separation flow field, given the distance between different levels of several typical flow field structure, the two typical flow patterns consistent with the experimental observations. When the distance between the stages is small, the interstage area is a dead zone, and the resistance of the precursor is negative, and a typical phenomenon of “back body effect” occurs. When the distance is large, a complex interference wave appears between the internal and external flows and a certain separation distance After the separation of the front edge of the body fluid flow appears positive shock waves, the body of the interference was isolated.