固体推进剂非稳态燃速测量及燃速对压强变化响应滞后

本文扼要介绍了一个能直接、快速地测量固体推进剂瞬时燃速的激光系统，并用于测量压强变化条件下的瞬时燃速响应滞后。实验结果显示，在压强振荡、降压和升压过程中，瞬时燃速对压强变化响应都有滞后。滞后时间（ｔ＊）随压强变化速率增加而减少。但ｔ＊－ｄｐ／ｄｔ曲线不是一条直线，而是一条近似的双曲线

MEASUREMENT OF UNSTEADY BURNING RATE AND DYNAMIC BURNING RATE DELAY IN RESPONSE TO PRESSURE CHANGE

A laser method capable of rapidly and directly measuring the unsteady burning rates has been introduced and used for measurement of burning rate delay with changing pressure The experimental results show that the burning rate delay occurs not only at oscillatory processes,but also at deprussurization or pressurization Adelay time of burning rate in response to pressure change is derived from time history of measured burning rates The delay time(t *) decreases as pressure change rate increases,The t * dp/dt cure is an approximate hyperbolic and not a straight