Numerical studies on the influences of gas temperature on atmospheric-pressure helium dielectric barrier discharge characteristics  

作　　者：霍伟刚 林靖松 于潭学 王玉新 张华 Weigang HUO;Jingsong LIN;Tanxue YU;Yuxin WANG;Hua ZHANG(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,People’s Republic of China)

机构地区：[1]School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第5期69-76,共8页等离子体科学和技术（英文版）

基　　金：supported by the Liaoning Provincial Department of Education Fund(No.LJ2020008)。

摘　　要：A fast-rising gas temperature is due to frequent collisions of the heavy particles in an atmosphericpressure dielectric barrier discharge.In this paper,a two-dimensional fluid model is applied to investigate the influences of rising gas temperature on an atmospheric-pressure helium dielectric barrier discharge.With the increase in the gas temperature,it is found that:(1)a helium discharge can evolve from the discharge column to a homogeneous discharge;(2)the breakdown time is in advance and the gas breakdown voltage decreases;(3)the spatial distribution evolution of the electron density is similar to that of the helium atom density.The most significant discrepancy between them is that the electron densities are high at some positions where the helium atom densities are nevertheless low.Furthermore,the radial reduced electric fields are obtained under different gas temperatures.The physical reasons for the gas temperature effects are discussed.The simulation results provide a better understanding of the roles of the radial reduced electric field and the heavy particle.

关 键 词：gas temperature electron density helium atom density radial reduced electric field 

分 类 号：O461[理学—电子物理学]