潜载导弹水下弹射过程数值仿真

针对无横流影响的潜射导弹水下弹射过程瞬态流场变化情况,建立了多相流数学模型。考虑空穴模型,运用动网格技术,再现了导弹水下弹射过程的筒口气团、肩空泡的演变过程以及弹体底部、固壁的压力变化。仿真结果表明,筒口效应导致固壁各处的压力阶跃;筒口气团收缩拉断的过程中,闭合点处形成高压区,导致固壁各处压力剧烈上升,同时闭合点处产生的反射流撞击导弹底部引起压力变化。

Numerical Simulation of the Underwater Launching Process of Submarine-Based Missile

The complex multiphase flow of non-effects of lateral flow to the underwater launching process of submarine-based missile was studied. By means of mixture model, cavitation model and dynamic mesh were used to simulate the process of evolvement of air mass and partial cavitation and the pressure on the wall of launch-platform and the bottom of the missile. The result indicated the pressure on the wall of launch-platform jump, high pressure field form at the closed point which induced the pressure on the wall of launch-platform rising, and reflected stream impinging the bottom of the missile induced the variety of pressure.