脉冲推力器用烟火型装药燃烧性能研究

采用光纤测速方法，研究了脉冲推力器用烟火型装药药剂配比和装药密度对燃速的影响。通过密闭爆发器，测试了药剂的燃速压强指数。结果表明，不同配比的药剂虽然初期燃速不同，但后期燃速趋于相同；随着装药密度增大，燃速先增加、后减少；在装药密度1.45 g/cm³时燃速最高，可达到800 m/s. 在所测试压强范围内，烟火型药剂的压强指数为0.736 4，说明该烟火型装药药剂在一定压强范围内可稳定工作，能够实现脉冲推力要求。

Study of Burning Performance of Pyrotechnic Composition of Impulsive Thruster

The burning rate of pyrotechnic composition of implosive thruster is measured by optical fiber speed-measuring technique, and the effects of the proportion of components and the main charge density on burning rate are studied. The pressure exponent of burning rate is measured by closed-bomb test. The results show that the burning rates of pyrotechnic compositions with different proportions are different at initial stage and are tend to be the same at later stage, and the burning rate increases first and then decreases with the increase in main charge density. The maximum burning rate of pyrotechnic composition can reach 800 m/s at the density of 1.45 g/cm³. The pressure exponent of burning rate is 0.736 4 in the test pressure range. It shows that the pyrotechnic composition can burn stably in a certain pressure range and can satisfy impulsive thrust requirement.