三电极非热电弧发生器放电模式的实验研究  

Experimental investigation of the discharge modes of a non-thermal arc plasma generator with three-electrode configuration

作　　者：王志斌[1] 陈国旭[1,2] 王哲[1] 葛楠[1] 李和平[1] 包成玉[1] 

机构地区：[1]清华大学工程物理系,北京100084 [2]兰州交通大学热能工程系,兰州730070

出　　处：《清华大学学报（自然科学版）》2014年第1期73-77,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(11035005)

摘　　要：该文提出了一种三电极非热电弧等离子体发生器结构设计,通过引入浮动电极,降低了非热电弧放电的点火电压,获得了稳态的非热电弧放电等离子体。实验结果表明：采用该三电极结构的等离子体发生器所产生的等离子体气体温度在2.0×10^3~3.0×10^3 K之间;在其他参数保持不变的情况下,随着等离子体工作气体流量的增加,存在非热电弧放电、非热电弧-介质阻挡混合放电和表面介质阻挡放电3种不同的放电模式;在等离子体工作气体流量不变的情况下,增加电源的输入功率将有利于使放电保持在非热电弧放电模式下。三电极结构的非热电弧发生器有助于实际应用中在较低的外加电压下产生非热电弧等离子体,并在较大的气体流量下维持非热电弧等离子体的工作状态。A non-thermal arc plasma generator was developed with three-electrode configuration. With the help of the surface dielectric barrier discharge （DBD） produced between the main electrode and floating electrode, the ignition voltage of the non-thermal arc discharge was reduced, and a steady state non-thermal arc plasma was obtained. Experiments show that the temperature of the non-thermal arc generated using this three-electrode plasma generator is 2.0 ×10^3 -- 3.0 ×10^3K and that there exist three different operating modes, i.e. , the non-thermal arc mode, the non-thermal arc-DBD hybrid mode, and the surface DBD mode, with the increase of the plasma working gas flow rate while keeping other parameters unchanged. The results also show that increasing the power input at a constant gas flow rate benefits maintaining a non-thermal arc discharge mode. The developed non-thermal arcplasma generator is useful for producing non-thermal arc plasmas at low applied voltages, and for maintaining non-thermal arc discharges at high gas flow rates.

关 键 词：等离子体 非热电弧 放电模式 

分 类 号：TK124[动力工程及工程热物理—工程热物理]