变燃速发射药的低温感性能

根据银纹厚度随温度的变化，改变火药燃烧面和建立一个补偿系统，使变燃速发射药具有低温度系数。通过扫描电镜观察变燃速发射药的微观结构，观察到外层的银纹和银纹厚度随温度的变化情况；通过密闭爆发器实验，对发射药高、低、常温的燃烧性能进行了对比；在30mm火炮上进行内弹道试验，观察其温度系数的变化。结果表明。银纹厚度随温度的变化改变火药的燃烧面积，从而改变了变燃速发射药的气体生成速率；变燃速发射药高、低、常温燃烧性能变化不大；变燃速发射药具有较低的温度系数。

Low Temperature Sensitivity of Variable-burning Rate Gun Propellant

By changing thickness of the crazes with temperature, the burning area of the propellant is changed. A compensating system is founded in two layered variable-burning rate propellant and low temperature coefficient of the propellant is realized. The craze and thickness of craze changing with temperature were observed by means of SEM; The combustion character of two layered variable burning rate propellant at high, low and normal temperature was obtained by the closed bomb test. The interior ballistic performance on 30mm gun to observe temperature coefficient was analyzed. The results indicate that using the thickness of craze changing with temperature to change the burning area of the propellant can change the rate of gas production of propelling charge. The closed bomb test shows that the combustion performance is about the same at different temperatures. The interior ballistics performance shows that the varibable-buring rate propellant has low temperature coefficient.