低温大气压介质阻挡氦气/氮气放电温度特性的数值研究  

Simulation studies on the dependence of the low-temperature atmosphere pressure He/N_(2) DBD on gas temperature

作　　者：闵杰 齐宏松 霍伟刚[2] MIN Jie;QI Hongsong;HUO Weigang(Science and Education Teaching Department,Zhumadian Preschool Education College,Zhumadian,Henan 463000,China;School of Physics and Electronic Technology,Liaoning Normal University,Dalian,Liaoning 116029,China)

机构地区：[1]驻马店幼儿师范高等专科学校科教融汇教学部,河南驻马店463000 [2]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《石河子大学学报（自然科学版）》2024年第6期775-785,共11页Journal of Shihezi University(Natural Science)

基　　金：辽宁省教育厅基本科研项目(JYTMS20231052)。

摘　　要：当气体温度(环境温度)低于一定值时,水蒸气、氮气和氧气会随着气体温度降低逐渐液化,进而导致大气压氦气介质阻挡放电(Dielectric barrier discharges, DBD)出现独特物理特性。本文基于COMSOL多物理场耦合仿真软件建立平板介质阻挡放电二维轴对称流体模型,利用该模型仿真分析了气体温度对低温大气压氦气/氮气DBD的电特性、放电模式、放电产生和发展等的影响。模拟结果表明:(1)随着气体温度的降低,低温大气压氦气/氮气DBD由柱状汤森逐渐转化为柱状辉光放电;击穿电压和柱放电中电子密度都逐渐增加;柱放电向电极径向中心移动。(2)放电先在瞬时阳极附近发生后向瞬时阴极发展;在气体温度较低时,柱状放电个数较少,但放电可以发展到瞬时阴极;不同径向位置的柱状放电不是同时发生的。模拟结果加深了对大气压DBD知识的理解,增加了大气压DBD等离子体的调控参量。When the gas temperature(ambient temperature)is below a certain value,water vapor,nitrogen,and oxygen will gradually liquefy with the decrease of the gas temperature.As a result,an atmospheric pressure helium dielectric barrier discharge(DBD)will display some unique physical characteristics.In this paper,a two-dimensional(2D)fluid model of the dielectric barrier discharge was established based on the COMSOL simulation software.The influences of the gas temperature on a low-temperature atmosphere pressure He/N_(2) DBD characteristics including electrical characteristics,discharge mode and discharge generation,development etc were researched.The simulation results show that:(1)With the decrease in the gas temperature,the discharge gradually transits from Townsend to glow discharge,and both the breakdown voltage and the electron density in the discharge column increase;The discharge column moves towards the radial center.(2)The discharges firstly occur near the instantaneous anode then develop towards the instantaneous cathode under different gas temperatures.The discharge can develop to the instantaneous cathode,but the discharge at different radial positions does not occur simultaneously at lower gas temperature.The simulation results can help deepen understanding of atmospheric pressure DBD discharge knowledge,and increase the control parameter of atmospheric pressure DBD plasma.

关 键 词：大气压介质阻挡放电 气体温度 汤森放电 辉光放电 

分 类 号：O461[理学—电子物理学]