等离子体射流对PDE快速起爆影响的数值仿真  

Numerical Simulation of Influence of Rapid Initiation of Plasma Jet on Pulse Detonation Engine

作　　者：林玲[1] 翁春生[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《计算机仿真》2013年第11期15-19,共5页Computer Simulation

基　　金：高等学校博士学科点专项科研基金(20093219110037);中央高校基本科研业务费专项资金资助(2011XQTR05)

摘　　要：在发动机爆轰管内快速优化点火起爆问题的研究中,产生稳定的爆轰波可使发动机获得稳定的推力。为明确上述过程,采用等离子射流快速起爆,建立多相爆轰模型,应用高精度CE/SE方法数值求解,研究等离子体射流对脉冲爆轰发动机起爆过程的影响。仿真结果表明:等离子体射流点火方式能很好的实现燃烧转爆轰过程,并形成稳定的爆轰波。射流能量和时间对燃烧转爆轰有显著的影响,当等离子体射流充分点燃可爆混合物,继续增加射流能量和时间对燃烧转爆轰影响较小。仿真结果对脉冲爆轰发动机的实验与设计均具有重要指导。For how to realize fast and efficient initiation and generate steady detonation wave in the pulse detona- tion tube is one of the key technologies, a mathematical model of the plasma jet ignition and multiphase detonation was developed to investigate the role of the plasma jet on the pulse detonation engine. The space-time conservation element and solution element （CE/SE） method was used to solve the equations, which has the advantages of high precision. The results show that the way of plasma jet ignition can achieve the Deflagration to Detonation Ttransition （DDT） process and finally form steady detonation. The jet energy and time have a significant impact on DDT. In- creasing the jet energy and time has less effection on Deflagration to Detonation when the plasma jet has fully ignited the explosive mixture. It has an important guidance on the experiment and design of the pulse detonation engine by the calculation results.

关 键 词：等离子体射流 脉冲爆轰发动机 时空守恒元与求解元方法 多相爆轰 

分 类 号：TJ011.1[兵器科学与技术—兵器发射理论与技术]