粒子冲刷对丁羟推进剂燃烧性能影响试验研究

利用X射线实时荧屏分析技术(RTR),开展了粒子冲刷条件下固体推进剂燃烧特性试验研究,获得了冲刷条件下丁羟推进剂燃烧界面动态退移图像和燃速变化规律。结果表明,在不同粒子冲刷速度条件下,丁羟推进剂的燃速均有增大。当粒子冲刷速度大于某一值时,燃面上会有凹坑形成,表明粒子冲刷导致推进剂燃速增加加剧,当冲刷速度小于这一值时,燃面上不会有明显凹坑出现,但在气相冲刷的作用下燃速也会有不同程度地增大,改变粒子浓度对燃速的影响不太明显。

Experimental study on effects of particle erosion on combustion property of HTPB propellant

The effects of particle erosion on combustion property of solid propellant were investigated by using X-ray real-time radiography technique(RTR).A series of HTPB regression dynamic images as well as the combustion law of HTPB propellant were obtained.The results show that the burning rate of HTPB propellant can be increased under different particle erosion velocity conditions.When the erosion velocity of particles is more than a certain value,the concave pit would form on the burning surface of the test sample,which indicates that the effect of particle erosion on burning rate is great.When the erosion velocity of particles is less than this value,there is nnot obvious concave pit on the burning surface.But the burning rate could be increased with different degree under gas-phase erosion.The effect of concentration of particle on burning rate is not obvious.