不同气压下氩气介质阻挡放电γ过程仿真

Simulation of Dielectric Barrier Discharge Gamma Process in Argon at Different Atmospheric Pressures

为了研究在氩气不同气压下对介质阻挡放电(DBD)的电气参数和放电特性的影响,利用有限元分析建立大气压下氩气中的二维轴对称板-板电极放电等离子体模型,并对放电过程进行求解,通过仿真得到放电过程中的电势、电子温度、电子密度及氩离子数密度随着空间位置变化的波形。仿真结果表明,介质阻挡放电的特性变化与放电环境气压变化有关,随着气压的增加,气压在一定范围内,电势、电子温度、电子密度都下降,且电势空间分布的变化与电子密度相关。

In order to study the effects of different argon pressures on the electrical parameters and discharge characteristics of dielectric barrier discharge (DBD), a two-dimensional axisymmetric plate-plate electrode plasma model was established by finite element analysis in argon at atmospheric pressure, and the discharge process was solved. The potential and electron temperature were obtained by simulation. The electron density and the number density of argon ion varied with the spatial position. The simulation results show that the characteristics of dielectric barrier discharge are related to the change of ambient pressure. With the increase of pressure, the potential, electron temperature and electron density decrease in a certain range of ambient pressure, and the spatial distribution of potential is related to electron density.