基于锥形管的环-板电极结构大气压等离子体射流特性  

Characteristics of Ar Atmospheric Pressure Plasma Jet Generated by Ring-plane Electrodes with Tapered Tube

作　　者：郝致远[1] 高博 吴波 汲胜昌[1] 刘月[1] 

机构地区：[1]西安交通大学电力设备国家重点实验室,西安710049 [2]宁夏电力科学研究院,银川750001

出　　处：《高电压技术》2014年第10期3098-3104,共7页High Voltage Engineering

基　　金：电力设备电气绝缘国家重点实验室资助项目(EIPE12308)~~

摘　　要：为了研究锥形管对Ar大气压等离子体射流的影响,在环–板电极结构的基础上,采用锥形石英玻璃管作为等离子体射流反应器,并引入了悬浮电极,对其进行了实验研究。通过大气压氩等离子体射流的电气特性的测量和光学特性的诊断,包括拍摄发光图像,测量射流的电压–电流波形和发射光谱,然后计算获得平均放电功率和电子激发温度,研究了当采用不同形状的玻璃管时,Ar等离子体射流的放电特性和演变规律,并结合气体流场仿真与电场仿真对所得的实验结果进行了分析。结果表明:与传统的直管电极结构相比,引入悬浮电极的基于锥形管的环–板电极结构产生的等离子体射流的放电电流有效值、放电功率以及电子激发温度均有所提高;利用锥形管可以使管中Ar气流在出口处的流速更快,且速度分布更为均匀,使得Ar气流可以更为平稳的向前扩展;同时在管口附近形成Ar含量较大的气体氛围,更有利于放电的发展;在环板电极结构中引入悬浮电极,加强了高压电极与悬浮电极间的电场,更易使流过电场中的气体电离,并且使能量集中在射流产生通道,提高了能量利用率。In order to investigate the effect of using taped quartz tube on generating Ar atmospheric pressure plasma jet（APPJ）, using a taped quartz tube as the plasma jet reactor in ring-plate electrode structure while introducing a suspensionelectrode into the device, we measured some electric and optical features of Ar APPJ, including voltage-current wave-forms, discharge images, and optical spectrum. Then we calculated and compared some plasma parameters, such asdischarge power, electronic excitation temperature, etc., according to different tubes. Furthermore, we studied the influ-ences of taped tube and suspension electrode on the APPJ＇s characteristics by fluid simulation and electric field simulation.The experimental results show that, compared with cylinder tubes, using taped tube as the reactor and introducing suspen-sion electrode can increase Ar APPJ＇s effective value of current, discharge power and electronic excitation temperature.Using the taped tube can accelerate Ar gas flow near the tube nozzle, and make the flow distribution of velocity moreeven, which helps the flow to propagate smoothly. In addition, the air content near the tube nozzle is reduced, which isfavorable for the discharge developing. The suspension electrode strengthens the electric field between the powered elec-trode and grounded electrode, which makes argon gas to ionize more easily and improves the energy＇s availability since itgathers energy around the APPJ＇s generating location.

关 键 词：Ar等离子体 大气压等离子体射流 放电特性 锥形石英玻璃管 悬浮电极 电极结构 

分 类 号：O53[理学—等离子体物理]