Characteristics of the Large Area Surface Dielectric Barrier Discharge with a Multi-electrode Configuration  

作　　者：LI Heping CHEN Guoxu WANG Zhibin GE Nan BAO Chengyu 

机构地区：[1]Department of Engineering Physics, Tsinghua University, Beijing 100084, China [2]Department of Thermal Energy and Power Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

出　　处：《高电压技术》2013年第9期2125-2130,共6页High Voltage Engineering

基　　金：Project supported by National Natural Science Foundation of China （10972119 61104204）.

摘　　要：Surface gas discharge(SGD)plasmas have potential applications in the fields of active flow control,gas purification,heat transfer enhancement,etc.In order to obtain a uniform,stable and large-area SGD at atmosphere,a multi-electrode SGD plasma generator is designed in this paper.The major features of this newly-designed SGD plasma generator is as follows:the air-exposed upper grounded electrodes are made of nine tungsten wires and flush mounted on the dielectric PTFE barrier layer,while the lower powered electrode is made of a copper foil and encapsulated inside the PTFE material to avoid the ignition of the gas discharges below the dielectric barrier layer.The measurements on the electrical characteristics,fast imaging of discharges and the preliminary numerical analysis on the electric field distributions suggest that the multi-electrode configuration of the plasma generator plays a crucial role in enhancing the local electrical field,and subsequently,leads to the stable,quasi-uniform and large-area surface discharges.Surface gas discharge （SGD） plasmas have potential applications in the fields of active flow control, gas purification, heat trans- fer enhancement, etc. In order to obtain a uniform, stable and large-area SGD at atmosphere, a multi-electrode SGD plasma generator is designed in this paper. The major features of this newly-designed SGD plasma generator is as follows： the air-exposed upper grounded elec- trodes are made of nine tungsten wires and flush mounted on the dielectric PTFE barrier layer, while the lower powered electrode is made of a copper foil and encapsulated inside the PTFE material to avoid the ignition of the gas discharges below the dielectric barrier layer. The measurements on the electrical characteristics, fast imaging of discharges and the preliminary numerical analysis on the electric field distri- butions suggest that the multi-electrode configuration of the plasma generator plays a crucial role in enhancing the local electrical field, and subsequently, leads to the stable, quasi-uniform and large-area surface discharges.

关 键 词：表面放电 电极配置 电气特性 介质阻挡放电 面积 等离子体发生器 PTFE材料 主动流动控制 

分 类 号：TN141.5[电子电信—物理电子学] TU834.64[建筑科学—供热、供燃气、通风及空调工程]