纳秒脉冲放电等离子体射流特性  

Characteristics of nanosecond-pulse atmospheric pressure plasma jet

作　　者：牛铮[1] 邵涛[1,2] 章程[1,2] 方志[3] 李春霞[4] 张东东[1,2] 严萍[1,2] 

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院电力电子与电气驱动重点实验室,北京100190 [3]南京工业大学自动化与电气工程学院,南京210009 [4]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2012年第3期617-620,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11076026;50907068);高分子材料工程国家重点实验室开放课题(KF201103)

摘　　要：采用单针式电极,使用单极性重复频率脉冲电源,在常压氦气、氩气、氮气和空气中得到等离子体射流,并改变电压、流量和气体种类,分别观察不同的实验条件对等离子体射流的影响。实验结果表明:射流长度随施加电压的增加而增长;随着流量的连续变化,射流长度先逐渐变长,达到峰值后由于湍流影响,长度又逐渐缩短,达到一定流量后趋于饱和。此外,不同工作气体中的等离子体射流呈现截然不同的外观,氦气和氩气中射流呈针状模式,长度可达7cm以上;而在氮气和空气中,射流呈现为长度不超过2cm的刷状模式。In the experiments,with the use of a single needle electrode,atmospheric pressure plasma jets are excited by a repetitive unipolar nanosecond-pulse generator,with working gases such as helium,argon,nitrogen and air.The results show that the jet length increases with the rise of applied voltage; as the flow rate of working gas increases,the length of jet becomes gradually longer and then reduces gradually to saturation after a certain flow rate due to turbulence.In addition,the plasma jets of different working gases have very different appearances.Helium and argon gas jets are needle-like,and the longest jet length is over 7 cm;whereas in nitrogen and in air,the jet is no more than 2 cm long,of brush-like mode.

关 键 词：纳秒脉冲 大气压等离子体射流 多种气体 射流长度 射流外观 

分 类 号：TM89[电气工程—高电压与绝缘技术] TM213[一般工业技术—材料科学与工程]