垂直冷弹发射装置装药燃烧数值分析

Numerical Simulation about the Impact of Inclined Launching Missile Jet Flow on the Front Covers of Launch Canisters

摘要:

针对燃气活塞弹射装置,采用加质源项法,通过UDF(用户自定义函数)编译,向高压室注入火药燃气的质量、动量、能量,实现了复杂燃烧化学反应的数值模拟,得到了高压室压力和速度分布及变化规律,分析了压力和速度对弹射装置的影响。计算结果表明,装药燃烧数值模拟与理论计算基本吻合,能够较好地仿真弹射装置高压室燃气流场的特性,为弹射装置进一步优化设计和装药设计提供理论参考。

Abstract:

Based a vertical ejecting device, the source item method and user defined function(UDF)technique were used to inject mass, momentum and energy of and propellant gas into chamber, get the jet flow field distribution on the surface of the propellant, the influence result from pressure and velocity is analyzed. The computation results show that this method can well predict ejection mechanism characteristics of inner flow field, and provide theory reference for the optimal design of the ejecting device and chamber.