CO2 等离子体中存在大量电子碰撞反应和化学反应,对CO2 流注放电进行深入仿真相当困难.建立针-平板电极非均匀电场模型,采用等离子体流体模型和自适应网格细化方法,对CO2 等离子体流注进行数值模拟研究.研究了外加电压、放电气压等参数对CO2 流注中的空间场强变化、流注中荷电粒子分布、流注速度等参数的影响.文章有助于深入理解CO2等离子体利用技术中流注的形成过程.
Abstract
There are many electron collisions and chemical reactions in CO2 plasma,making conducting in-depth simulations of CO2 streamer discharge quite challenging.In this article,we establish a non-uniform electric field model for a needle-flat electrode and use a plasma fluid model and adaptive mesh refinement method to numerically simulate the CO2 plasma streamer.We studied the effects of external voltage,discharge pressure,and other parameters on the spatial field strength variation,charged particle distribution,and flow velocity in the CO2 streamer.This study contributes to a deeper understanding of the formation process of streamers in CO2 plasma utilization technology.
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