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潜射导弹出筒过程的研究对其水弹道以及水下动载荷的计算具有重要的意义。本文采用多相流模型和动网格技术,求解非定常雷诺平均NS方程,对考虑潜艇平动影响的导弹冷弹射出筒过程进行了三维非定常数值模拟。三维数值模拟体现出筒口效应、发射气团现象等经典实验现象与实验符合较好,说明本文方法能够有效地揭示导弹出筒过程中多相流体间的相互作用以及相应的流体动力特性,通过分析这些现象中导弹所受冲击的形成机理,为工程应用提供有意义的参考。
The research on submarine-launched missile ejection process is of great significance to the calculation of its water-ballistic and underwater dynamic load. In this paper, unsteady Reynolds-averaged Navier-Stokes equations are solved by multiphase flow model and moving grid technique. Three-dimensional unsteady numerical simulations of missile cold-shooting projectile tube with submarine translational impact are carried out. The three-dimensional numerical simulation shows that the classic experiment phenomena such as barrel mouth effect and air-launched mass phenomenon are in good agreement with the experimental results, which shows that the proposed method can effectively reveal the interaction between multiphase fluid and the corresponding fluid dynamic characteristics during the missile ejection process. The formation mechanism of the impact of the missile in the phenomenon provides a meaningful reference for engineering application.