利用锥形内孔装药发动机和燃速辨识方法确定推进剂的基本燃速

通过锥形内初装药发动机试验的压力-时间曲线,利用燃速辨识方法获得了高低两个压强范围装药的基本燃速表达式,比较了考虑c~*、k随燃烧室压强P变化和不考虑其变化所得的基本燃速表达式及其对内弹道予示的影响.结果证明,用本方法获得的燃速比燃速仪获得的燃速高5～8%,预示的内弹道曲线也与发动机实测曲线基本吻合.

Determination of Basical Burning Rate of Propellant by Using Burning Rate Recognition to Cavity Charge Engine

A pressure-time test curve of cavity charge engine is used to determine the expression for calculating the basical burning rate of grain charged at high andlow pressure ranges by means of burning rate recognition.Compared with test data obtained from burning rate measuring instrument,the burning rate from the expression proposed in this paper is 5-8% higher.The predicted interior ballistics is very agreed with measured results.