固体推进剂电弧点火延迟时间仿真研究

Simulation Studies on Solid Propellant Ignition Delay Time Under Arc Plasma

首先对电弧进行了仿真研究,得到了不同电弧功率下电弧温度时间特性,然后利用该温度特性,作为固体推进剂点火的边界条件,采用数值差分方法,计算了固体推进剂的点火延迟时间;结果表明:固体推进剂的点火延迟时间随着电弧功率的增大而减小,当电弧功率从50 W增加到500 W时,固体推进剂的点火延迟时间从8.82 ms减小到0.99 ms,并且随着电弧功率的升高,点火延迟时间减小的速度减慢。

Firstly,a simulation research was carried on,and the temperature characteristics changing with time under different power between the two electrodes was obtained. Then the temperature of arc plasma center was used as a boundary conditions for solid propellant ignition,and solid propellant ignition delay time under different power was calculated. Finally,come to a conclusion that the solid propellant ignition delay time decreases with the increase of electrode power,when the electrode power increase from 50 W to500 W,solid propellant ignition delay time decreases from 8. 82 ms to 0. 99 ms,and with the increase of power,the growth of ignition delay time is slowing down.