大气压放电氦气等离子体射流特性  

Characteristics of Atmospheric Pressure Helium Plasma Jets

作　　者：侯世英[1] 罗书豪[2] 孙韬[1] 曾鹏[3] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]国网四川省电力公司检修公司,成都610000 [3]国网四川省电力公司成都供电公司,成都610000

出　　处：《高电压技术》2014年第4期1207-1213,共7页High Voltage Engineering

基　　金：输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711204);国家"111"计划(B08036)~~

摘　　要：为研究大气压下不同氦气等离子体射流结构的电特性及其射流影响因素,对外表面双电极、针-环电极、单电极结构下的大气压放电氦气等离子体射流特性进行了实验分析。分别观测、对比了不同实验条件,如电极位置、电极尺寸、外加电压和气体体积流量等,对等离子体射流的影响。结果表明:外表面双电极和针-环电极结构均可实现稳定的多脉冲放电;处于层流状态时,3种结构下等离子体射流长度均随着电压的升高而变长;当针-环电极结构的接地电极远离喷口,或是单电极结构的高压电极远离喷口时,射流长度均会缩短;外表面双电极和单电极结构中,高压电极宽度的增大会使射流长度变长,但针-环结构中电极宽度增大反而会导致射流长度缩短;针-环电极结构的伏安曲线、功率特性曲线均比外表面双电极结构的对应曲线"陡",且针-环电极结构的放电功率相对较高。In order to investigate the electric characteristics and influencing factors of atmospheric pressure helium plasma jets （APHPJs） with different electrode configurations, we analyzed the APHPJs in three kinds of electrode configurations, namely, double-wrapped electrode, needle-ring electrode, and single electrode through experiments, in which we observed and compared the changing in APHPJs under different experiment conditions, such as electrode position, geometric di- mensioning of electrode, applied voltage, and gas volume flow etc. The results show that, the multiple-pulse can be obtained both in double-wrapped electrode and needle-ring electrode. For all the three electrode configurations, length of APHPJ in laminar flow mode increases with applied voltage. When nozzle gets away from the grounding electrode of needle-ring electrode configuration or from the high voltage electrode of single electrode configuration, the jet length gets shorter. For both double-wrapped and single electrode configurations, increasing the width of high voltage electrode leads to growth of jet length, which is opposite to the result in needle-ring electrode configurations. Moreover, compared with double-wrapped electrode configuration, needle-ring electrode configuration has steeper characteristic curves of volt-ampere and power, as well as higher discharge power.

关 键 词：大气压等离子体 射流 电极参数 射流长度 多脉冲 介质阻挡放电 

分 类 号：O461[理学—电子物理学] O358[理学—物理]