The revolving barrel gun is the principal component of the close-in weapons system (CIWS) that provides important terminal defense against anti-ship cruise missiles that have penetrated fleet defenses. The muzzle flow field of the revolving barrel firing is extraordinarily complex. The 3D computational model was formulated to illustrate the details of the flow field produced by the revolving barrel gun firing. The algorithm of a second order monotone upstream-centered schemes (MUSCL) approach with the advection upstream splitting method (AUSM) solver was used to simulate the high pressure muzzle flow field. The interior ballistic process was coupled with the simulation. The predicted muzzle velocity and maximum bore pressure were in good agreement with those measured in gun firing. Moreover, the muzzle flow field was obtained during the revolving barrel firing and was subsequently analyzed. The maximum lateral velocity of the first and second projectile fired was about 1.6 and 3.8 m/s.
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机译：旋转桶炮是近距离武器系统（CIWS）的主要组成部分，该系统提供重要的终端防御，以防御已穿透舰队防御的反舰巡航导弹。旋转桶射击的枪口流场非常复杂。制定了3D计算模型，以说明由旋转桶装枪射击产生的流场的细节。采用平流上游分裂法（AUSM）求解器的二阶单调上游中心方案（MUSCL）算法模拟高压枪口流场。内部弹道过程与仿真相结合。预计的炮口速度和最大膛孔压力与在火炮射击中测得的吻合良好。此外，在旋转枪管射击过程中获得了枪口流场，随后对其进行了分析。发射的第一枚和第二枚弹丸的最大横向速度分别约为1.6和3.8 m / s。
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