等离子体射流点火的动力学机理分析  

Analysis of Kinetic Mechanism on Plasma Jet Ignition

作　　者：何立明[1] 陈高成[1] 赵兵兵 白晓峰 祁文涛[1] 张华磊[1] HE Liming1, CHEN Gaocheng1, ZHAO Bingbing2, BAI Xiaofeng3, QI Wentao1, ZHANG Hualei1(1 .Engineering College of Aeronautics and Astronautics, Air Force Engineering University, Xi＇an 710038, China; 2. 95616 Armed Forces, Chengdu 611531, China; 3.93256 Armed Forces, Shenyang 110043, Chin)

机构地区：[1]空军工程大学航空航天工程学院,西安710038 [2]95616部队,成都611531 [3]93256部队,沈阳110043

出　　处：《高电压技术》2018年第3期856-863,共8页High Voltage Engineering

摘　　要：为深入研究等离子体点火射流中主要活性粒子种类及摩尔分数对煤油/空气混合气燃烧过程的影响规律及主要影响途径,采用敏感性分析和化学反应速率（rate of production,ROP）分析方法对等离子体点火过程的化学反应机理进行了计算分析。计算结果表明：O原子、H原子、CH基能显著缩短煤油/空气混合气的点火延迟时间,且粒子摩尔分数越大对点火延迟时间的影响越显著;CH基通过基元反应R32和R34在缩短煤油/空气混合气点火延迟时间过程中占主导作用,在加入2%CH基后煤油/空气混合气的点火延迟时间为9.85μs,与基准工况相比缩短了68.2%;O原子和H原子对煤油/空气混合气的点火延迟时间的影响效果相当。In order to study the influences and the main pathways of type and mole fraction of the predominant reactive species on kerosene/air mixture in the combustion process, we calculated the chemical reaction mechanism of plasma jet ignition by using sensitivity analysis and ROP. The simulation results show that oxygen atom, hydrogen atom, and hydrocarbon radicals can reduce the ignition delay time of kerosene/air mixture significantly.The greater the particle mole fraction is, the shorter the ignition delay time will be. Hydrocarbon radicals play a dominant role in shortening the ignition delay time of kerosene/air mixture by the primitive reaction R32 and R34. When adding 2% hydrocarbon radicals, the ignition delay time is 9.85 microseconds, which is 68.2% shorter compared with the normal plasma ignition. The influence of oxygen atom on ignition delay time is the same as that of hydrogen atom.

关 键 词：等离子体 点火 活性粒子 煤油 动力学机理 化学反应速率分析 

分 类 号：O53[理学—等离子体物理]