气室装置对变威力发射影响分析

Analysis of Influence of Gas Chamber on Variable Power Launching

身管开孔泄气可以有效地调节弹丸初速实现变威力发射,身管开孔后通常加装气室装置对火药气体进行密闭或者通过气室装置引导火药气体排入大气。针对气室装置结构的不同,根据经典内弹道理论及气体动力学原理,建立了变威力发射过程的数学模型,通过数值仿真分析比较了两种不同变威力发射方案调速效果,得出了不同泄气孔面积对气室压力的影响规律,并研究了气室孔面积大小对初速的影响,研究结果对外置气室装置式变威力发射武器研制具有重要的指导意义。

Venting on barrel is an effective way to adjust the muzzle velocity and conduct variable power launching. A gas chamber device is usually installed on the barrel to seal propellant gas or guide the gas exhausting into the atmophere. For different structures of the chamber device, according to the classic interior ballistics theory and gas dynamics, a mathmatical model of the interior ballistics is established to describe the process of variable power launching. The effect of adjusting the muzzle velocity of two different variable power launching schemes is analyzed and compared, the influence rules of different venting areas on the chamber pressure and the venting area of the gas chamer on muzzle velocity are studied. The results are of great significance to the development of the variable power weapons with externally mounted gas chamber device.