对三管并联发射产生的含高速运动弹丸的膛口射流进行数值模拟计算,建立其数学物理模型,采用AUSM格式求解三维N-S方程,弹丸采用大位移运动边界的动网格技术处理,湍流模型采用Spalart-Allmaras模型。得到了含高速运动弹丸的膛口射流的结构和流动参数,预测了膛口射流与弹丸出膛口后的相互耦合作用。结果可为多管发射武器系统射击精度的预测提供必要依据。

Abstract: A model of three-barrel gun including high speed projectiles was presented, the dynamics process of muzzle flow with projectiles was simulated by using AUSM scheme with N-S equation, and large displacement boundary of dynamic mesh, method were employed to solve the Spalart-Allmaras. According to the predicted results, the blast wave patterns and development of the powder gas flow field in the vicinity of the muzzle were analyzed in detail to reveal the interrelationship between flow field and projectiles based on the numerical results. The results can be used for provide necessary basis of prediction in firing accuracy of multi-barrel gun weapon system.