空气等离子体射流动态过程分析  

Analysis of the Dynamic Process of Air Plasma Jet

作　　者：何立明[1] 祁文涛[1] 赵兵兵[1] 陈高成[1] 白晓峰 段昆仑 

机构地区：[1]空军工程大学航空航天工程学院 [2]解放军93256部队 [3]空军装备部

出　　处：《高电压技术》2015年第6期2030-2036,共7页High Voltage Engineering

基　　金：国家自然科学基金(51436008;51106179)~~

摘　　要：等离子体射流可有效提高点火效率,为探究等离子体射流动态特性,建立了实验测量系统,利用高速CCD相机记录等离子体点火射流发展过程,分析了等离子体射流击穿过程和稳定工作过程特性。实验结果表明：设计的等离子体点火器电弧击穿时间为65 ns,击穿电压为9.2 k V,射流形成时间约为1.62 ms;大尺度分流周期约为1.1~1.8 ms,小尺度分流周期约为0.1~0.16 ms;电极温度的均匀度、高速旋流气体对电弧发展以及射流形成过程中的强烈脉动有不同程度的影响;射流核不存在稳定区域。Plasma jet is effective in improving the efficiency of ignition. To investigate the dynamic characteristics of plasma jet, we built up an experimental measurement system and used high-speed CCD camera to register the develop- ment plasma igniter jet, and then analyzed the breakdown process and the steady working status of the plasma jet. According to the experiments, the breakdown time and the breakdown voltage of the ignitor are 65 ns and 9.2 kV, respec- tively, and it takes 1.62 ms to form the plasma jet. Moreover, the periods of the large scale diffiuence and the small scale diffiuence are about 1.1-1.8 ms and 0.1~0.16 ms, respectively. The uniformity of electrode temperature and the high-speed swirl gas will affect the impetuosity pulsation during the processes of arc development and jet formation to different degrees. There is no steady area in any plasma jet core.

关 键 词：等离子体 点火器 电弧 分流 放电特性 射流特性 

分 类 号：O53[理学—等离子体物理]