Numerical study on an atmospheric pressure helium discharge propagating in a dielectric tube:influence of tube diameter  

作　　者：Zhoutao SUN Wen YAN Longfei JI Zhenhua BI Ying SONG Dongping LIU 孙洲涛;晏雯;季龙飞;毕振华;宋颖;刘东平(School of Physics and Materials Engineering,Dalian Nationalities University)

机构地区：School of Physics and Materials Engineering,Dalian Nationalities University,Dalian 116600,People＇s Republic of China

出　　处：《Plasma Science and Technology》2018年第8期22-28,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11705022,11505025,11705023);Innovation and Entrepreneurship Plan of Dalian Nationalities University(school-level A+Nos.201712026380)

摘　　要：In this work, a two-dimensional numerical simulation of the discharge characteristics of helium plasma propagating inside a dielectric tube was performed. A trapezoidal ＋9 kV pulse lasting 400 ns was applied on a needle electrode set inside the dielectric tube to ignite the discharge. The discharges generated in the tubes with a variable or a constant inner diameter were investigated.The focus of this study was on clarifying the effect of the tube diameter on the discharge structure and dynamics. The comparison of the discharge characteristics generated in dielectric tubes with different diameters was carried out. It was shown that the tube diameter plays a significant role in discharge behavior of plasma propagating in the dielectric tube.In this work, a two-dimensional numerical simulation of the discharge characteristics of helium plasma propagating inside a dielectric tube was performed. A trapezoidal ＋9 kV pulse lasting 400 ns was applied on a needle electrode set inside the dielectric tube to ignite the discharge. The discharges generated in the tubes with a variable or a constant inner diameter were investigated.The focus of this study was on clarifying the effect of the tube diameter on the discharge structure and dynamics. The comparison of the discharge characteristics generated in dielectric tubes with different diameters was carried out. It was shown that the tube diameter plays a significant role in discharge behavior of plasma propagating in the dielectric tube.

关 键 词：atmospheric pressure helium discharges discharge front numerical simulation 

分 类 号：O53[理学—等离子体物理]