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喷孔前置式膨胀波枪炮是一种结合了喷气反推式低后坐力枪炮和膨胀波火炮性能优点的新型低后坐力武器。提出了其发射过程的四阶段物理模型,运用准一维准两相流理论建立了其内弹道过程的动力学模型,针对其特殊的减后坐组件结构提出了身管—反作用导气管双流场耦合计算的边界条件和计算方法,以14.5mm喷孔前置式膨胀波弹道枪为例进行了数值仿真,并将仿真结果与普通14.5mm机枪的内弹道过程进行了对比。结果表明,在结构参数匹配合理的情况下14.5mm喷孔前置式膨胀波弹道枪能在不减小弹丸初速的前提下减少40.56%的后坐动量。
Spray holes Pre-installed Explosive Wave Gun is a new low-recoil weapon that combines the performance advantages of jet-thrust low recoil guns and Explosive Wave gun. A four-stage physical model of its launch process is proposed. The dynamic model of the internal ballistic process is established by quasi-one-dimensional quasi-two-phase flow theory. A double-flow field Coupled calculation of the boundary conditions and calculation methods to 14.5mm nozzle front expansion wave ballistic gun as an example for numerical simulation, and the simulation results with the conventional 14.5mm machine gun internal ballistic process were compared. The results show that the 14.5mm jetted forward expansion wave ballistic gun can reduce the recoil momentum by 40.56% without reducing the initial velocities of the projectile under reasonable structural parameters matching.