点火燃气流量特性对短脉冲推冲器点火过程影响数值分析  

Numerical analysis of effect of ignition gas flow characteristic on ignition process of short impulse thruster

作　　者：王志新[1,2] 李国新[1] 蒋新广[1] 劳允亮[1] 张建富[2] 李浩 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]中国人民解放军驻474厂军事代表室,抚顺113003 [3]总装备部驻大连地区军事代表室,大连116001

出　　处：《固体火箭技术》2009年第2期159-162,共4页Journal of Solid Rocket Technology

基　　金：国家安全重大基础研究项目基金资助(513390303)

摘　　要：短脉冲推冲器的工作时间极短,其点火过程对点火燃气流量特性非常敏感。为提高点火的稳定性和可靠性,优化点火药与主装药能量匹配,应用流体计算软件(Fluent),对不同点火流量特性情况下短脉冲推冲器点火过程进行了轴对称数值分析。结果表明,在点火燃气作用时间τ一定的情况下,点火燃气上升时间τ_a对点火延迟时间、主装药点火期间燃烧室内最大压强和最高温度有明显影响。当τ_a>0.3 ms或τ_a<0.3 ms时,会造成点火期间燃烧室内压强过高。当τ=1 ms,τ_a=0.3 ms时,推冲器点火燃气流量特性与主装药瞬时点火具有较优的能量匹配。The characteristics of ignition combustion gas flow have great effect on the ignition process of short impulse thruster. To make sure that the main charge can be ignited reliably and safely, a numerical analysis on the ignition process of impulse thruster under different conditions of ignition combustion gas flow were carried out with Fluent softwane. The results show .that the rise time τa. of combustion gas flow plays a significant effect on the ignition delay time as well as the maximum pressure and temperature in combustion chamber. When the action time τ and rise time τa of combustion gas flow are 1 ms and 0.3 ms, respectively the ignition process is satisfactory.

关 键 词：短脉冲推冲器 点火燃气 点火过程 数值分析 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]