Plasma propagation in single-particle packed dielectric barrier discharges:joint effects of particle shape and discharge gap  

作　　者：Min ZHU Shengyu HU Yinghao ZHANG Shuqun WU Chaohai ZHANG 朱珉;胡生宇;张英豪;吴淑群;张潮海(Department of Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,People's Republic of China)

机构地区：[1]Department of Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第6期124-134,共11页等离子体科学和技术（英文版）

基　　金：the National Key R&D Program of China(No.2021YFF0603100);the Natural Science Foundation of Jiangsu Province(No.BK20200452);the Postdoctoral Research Foundation of China(No.2020M681584);National Natural Science Foundation of China(No.51977110)。

摘　　要：In this work,a single Al_(2)O_(3) particle packed dielectric barrier discharge(DBD)reactor with adjustable discharge gap is built,and the influences of the particle shape(ball and column)and the residual gap between the top electrode and particle on the electrical and optical characteristics of plasma are studied.Our research confirms that streamer discharge and surface discharge are the two main discharge patterns in the single-particle packed DBD reactor.The strong electric field distortion at the top of the ball or column caused by the dielectric polarization effect is an important reason for the formation of streamer discharge.The length of streamer discharge is proportional to the size of the residual gap,but the number of discharge times of a single voltage cycle shows an opposite trend.Compared to the column,a smooth spherical surface is more conducive to the formation of large and uniform surface discharges.The surface discharge area and the discharge intensity reach a maximum when the gap is equal to the diameter of the ball.All in all,the results of this study will provide important theoretical support for the establishment of the synergistic characteristics of discharge and catalysis in plasma catalysis.

关 键 词：low-temperature plasma packed-bed dielectric barrier discharge streamer discharge surface discharge plasma catalysis 

分 类 号：O53[理学—等离子体物理]