Microscopic analysis of Trichel's pulse characteristics and the effect of air pressure and temperature
Microscopic analysis of Trichel's pulse characteristics and the effect of air pressure and temperature
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DOI：
10.1063/5.0121902
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发表时间：
2022-12
影响因子：
2.2
通讯作者：
Zhanlong Zhang;Bowen Deng;Jun Deng;Youquan Dai;H Zhao;Zijian Dong
中科院分区：
文献类型：
--
作者：
Zhanlong Zhang;Bowen Deng;Jun Deng;Youquan Dai;H Zhao;Zijian Dong
进行了针-板电极下的负直流电晕放电实验，得到了典型的Trichel脉冲波形。为了分析电晕放电的微观过程，建立了考虑空气化学反应的等离子体-流体放电仿真模型，得到了与实验波形一致的Trichel脉冲波形。从而阐明了在放电过程中对带电粒子的产生和消失起主导作用的化学反应以及带电粒子的时空分布和数量变化。在此基础上，研究了不同气压和温度条件下放电过程中微观和宏观参数的变化规律。结果表明，微观参数如电荷密度和电场强度与气压呈负相关，与温度呈正相关;宏观参数如Trichel脉冲平均电流、平均峰值电流和放电频率与微观参数呈正相关。
The negative direct current corona discharge experiment under the needle-plate electrode is conducted, and the typical Trichel pulse waveform is obtained. Furthermore, to analyze the microscopic process of corona discharge, a plasma-fluid discharge simulation model, including air chemical reactions, is established, and a Trichel pulse waveform is obtained, which is consistent with the experimentally obtained waveform. Thus, the chemical reaction that plays a dominant role in the generation and disappearance of charged particles as well as the spatiotemporal distribution and quantitative variation of charged particles during the discharge process are clarified. On this basis, the variation of the microscopic and macroscopic parameters in the discharge process under different air pressure and temperature conditions is studied. The results show that microscopic parameters, such as charge density and electric field intensity, are negatively associated with air pressure and positively associated with temperature, while macroscopic parameters, such as Trichel pulse average current, average peak current, and discharge frequency, are positively associated with the microscopic parameters.