双门式炮闩膨胀波火炮最佳开闩时机确定和分析

Confirmation and Analysis on Optimal Opening Time of Rarefaction Wave Gun with Two-Door Breechblock

膨胀波火炮利用开闩后膨胀波从膛底传播到弹底需要时间的方法,实现了在不降低弹丸初速的前提下大幅度减小火炮后坐行程的目的。根据膨胀波火炮的发射原理,对最新设计研制的双门式炮闩膨胀波火炮进行了经典内弹道建模和数值仿真,并利用反推法计算了双门式膨胀波火炮膨胀波在身管内的传播速度和行程,进而获得最佳开闩时机。结果表明内弹道模型的不同,得到的最佳开闩时机也不同。

The rarefaction wave gun （RAVEN） can achieve much low recoil momentum without decreasing the projectile muzzle velocity by means of confirming thetime which the rarefaction wave needs to travel in the barrel. Based on the working principle of RAVEN, the physical and classical interior ballistics models of RAVEN with the redesigned newly two-door breechblock were set up and simulated. The velocity and travel of the rarefaction wave in RAVEN with two-door breechblock were calculated so as to acquire the optimalbreechblock opening time. The results showed that the optimal breechblock opening time is diffe- rent because of different interior ballistics models.