某新型发射药在身管附加装药中的应用研究

Application of a New Gun Propellant in Barrel Additional Charge

为研究身管附加装药的类压力平台增速效应,采用了在弹道枪炮身管上安装附加药室的试验装置。其主药室装药采用6/7-XDGZB高能硝胺发射药,附加药室装药采用4/1-XDZJ高能发射药。密闭爆发器试验和内弹道试验结果表明:6/7-XDGZB发射药具有起始缓燃性,4/1-XDZJ发射药具有速燃和渐减燃烧特性,两者配合在膛内燃烧,在最大膛压基本保持不变的情况下,初速从空白装药(传统的单一装药,没有附加装药)的981m.s-1提高到附加装药的1063m.s-1,提高了82m.s-1,增幅为8.4%,示压效率由0.47提高到0.58。

An experimental device that additional chambers were mounted on a barrel of 14.5 mm ballistic machine gun was adopted in order to study the pressure platform-like effect of increasing muzzle velocity with a barrel additional charge.The 6/7-XDGZB gun propellant was used as the main charge,and the 4/1-XDZJ was used as the additional charge.The results of closed bomb experiment and interior ballistic experiment show that the 6/7-XDGZB gun propellant has the characteristics of lower initial burning rate,and the 4/1-XDZJ gun perpellant with higher burning rate has property of regressive burning.The two charges burn in coordination in their respective chambers,and the muzzle velocity of the additional charge can rise from 981 m·s-1 to 1063 m·s-1 compared to the blank charge（i.e.main charge only,no additional charge）under the condition in keeping the maximum pressure unchanged,and piezometric efficiency can rise from 0.47 to 0.58.