RDX激光点火特性数值分析

Numerical Analysis of Laser Ignition Characteristics of RDX

用数值模拟分析计算了黑索今(RDX)的激光点火过程。结果表明,RDX经加热、熔化、分解、蒸发,反应物进入气相后,随反应物的积累,温度和气相反应速率的增加,气相被点着。讨论了环境压力和激光功率密度对点火延迟时间和临界点火距离的影响,计算所得的点火延迟时间与文献报道的研究结果一致。

The process of laser ignition of RDX was calculated using numerical simulation. The results show that the gas phase is ignited with the accumulation of reactant and the increase of temperature and reaction rate in the gas phase after undergoing a series of processes of heating, melting, decomposing, vaporizing and flowing into gas-phase for RDX. The effect of environment pressure and laser power density on ignition delay time and critical ignition distance was discussed. The calculated ignition delay time is consistent with the results reported in previous literatures.