Characteristic studies on positive and negative streamers of double-sided pulsed surface dielectric barrier discharge  

作　　者：Yan JIANG Bangfa PENG Zhengyan LIU Nan JIANG Na LU Kefeng SHANG Jie LI 姜岩;彭邦发;刘政妍;姜楠;鲁娜;商克峰;李杰(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,People's Republic of China;School of Environmental Science&Technology,Dalian University of Technology,Dalian 116024,People's Republic of China)

机构地区：[1]School of Electrical Engineering,Dalian University of Technology,Dalian 116024,People's Republic of China [2]School of Environmental Science&Technology,Dalian University of Technology,Dalian 116024,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第4期37-52,共16页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.51877027 and 52107140);Project funded by China Postdoctoral Science Foundation(No.2021M700662)。

摘　　要：The mechanisms of streamer generation and propagation in double-sided pulsed surface dielectric barrier discharge(SDBD)on both sides have been analyzed and investigated by experiment and numerical simulation.The fully exposed asymmetric SDBD has two discharge processes located on the high voltage electrode(HVE)side and the ground electrode(GE)side.Discharge images of the HVE side and GE side are taken by a digital camera under continuous pulse and ICCD(Intensified Charge Coupled Device)is utilized to diagnose the generation and propagation of streamers in single pulse discharge.In order to understand the physical mechanisms of streamer evolution more deeply,we establish a 2D simulation model and analyze it from the aspects of electron density,ion density,reduced electric field and electron impact ionization source term.The results show that the primary and secondary discharges on the HVE side and the GE side of the double-sided SDBD are composed of positive streamer and negative streamer,respectively.On the HVE side,the accumulation of positive charges on the dielectric surface causes the direction of the electric field to reverse,which is the principal factor for the polarity reversal of the streamer.On the GE side,both the negative charges accumulated on the dielectric surface and the falling voltage are the key factors for the streamer polarity switch.

关 键 词：double-sided SDBD positive streamer negative streamer nanosecond pulse 

分 类 号：O461.2[理学—电子物理学]