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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, the arc was simulated and the time characteristics of arc temperature under different arc power were obtained. Then, the temperature characteristic was used as the boundary condition for solid propellant ignition. The numerical difference method was used to calculate the ignition delay time of solid propellant. Results It shows that the ignition delay time of solid propellant decreases with the increase of arc power. When the arc power increases from 50 W to 500 W, the ignition delay time of solid propellant reduces from 8.82 ms to 0.99 ms, As the arc power increases, the ignition delay time decreases at a slower rate.