摘要
建立了PDE管内利用等离子体射流点火过程的一维两相流体动力学数学模型,并用CE/SE方法对管内两相爆轰过程进行了数值模拟。分析讨论了等离子体射流点火不同射流时间及点火能量对于爆轰波形成的影响。结果表明:与常规火花点火相比,等离子体射流点火可以缩短DDT时间约35%,缩短DDT距离约30%;在能够形成爆轰的情况下,等离子体点火能量和点火时间的增加对DDT距离影响很小。计算结果对提高脉冲爆轰发动机的运行频率具有重要的参考价值。
A dynamics mathematical model of one-dimensional two-phase flow of transient plasma ignition （TPI） process was established in pulse detonation engine （PDE） tubes, and numerical simulation of two- phase detonation process in tubes was performed by use of CE/SE method. The influence of different jet ignition time and ignition energy of plasma jet ignition on detonation wave formation were analyzed and discussed. The results showed that compared with conventional spark ignition system, plasma jet ignition method is more effective. By means of plasma jet ignition method, DDT time can be decreased about 35%, and DDT distance can be decreased about 30%. Under the condition of detonation formation, the increases of plasma ignition time and ignition energy have little effect on DDT distance. All of these calculation results can provide important reference for improving the operating frequency of PDE.
出处
《火炮发射与控制学报》
北大核心
2009年第2期77-80,共4页
Journal of Gun Launch & Control
基金
国家自然科学基金资助(10672080)
关键词
流体力学
等离子体点火
脉冲爆轰发动机
两相爆轰
hydromechanics
transient plasma ignition
pulse detonation engine
two-phase detonation
