The dynamic evolution of atmospheric-pressure pulsed air discharge over a water droplet
The dynamic evolution of atmospheric-pressure pulsed air discharge over a water droplet
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水滴上大气压脉冲空气放电的动态演化
DOI：
10.1063/5.0083246
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发表时间：
2022-04
影响因子：
2.2
通讯作者：
Zilu Zhao
中科院分区：
文献类型：
--
作者：
Zhiguo Zhao;Dongping Liu;Yang Xia;Guofeng Li;Chunjie Niu;Zhihua Qi;Xi Wang;Zilu Zhao
本文采用一种以水滴为悬浮电极的针-板反应器，研究了水滴表面脉冲空气放电的动态演化过程。利用增强型电荷耦合器件（ICCD）摄像机拍摄脉冲放电的时间和空间演化过程，通过求解麦克斯韦方程组得到电场的空间分布。ICCD测量结果表明，放电是在阳极和液滴之间的气体间隙中开始的，然后在液滴上传播。我们的模拟证实了当水滴被放置在气体空间中时，形成了强电场。空气放电在水滴上的传播是阳极导向的，其传播速度约为1.8 × 105 m s-1。随着施加电压的降低，在气体空间中形成长持续时间的空气放电，这可能与水滴中残留的电荷的扩散控制组合有关。
In this paper, a pin-to-plate reactor with a water droplet as a suspended electrode is employed to investigate the dynamic evolution of pulsed air discharge over the water droplet. The temporal and spatial evolution of the pulsed discharge is captured by an intensified charge-coupled device (ICCD) camera, and the spatial distribution of the electric field is obtained by solving the Maxwell equations. Our ICCD measurements show that the discharge is initiated in the gas gap between the anode and the droplet, and then it propagates over the droplet. Our simulation confirms that the strong electric field is formed when the water droplet is placed in the gas space. The propagation of air discharge over the water droplet anode-directed and its propagation velocity is on the order of 1.8 × 105 m s−1. With a decrease in the applied voltage, the long duration of air discharge is formed in the gas space, which could be related to the diffusion-controlled combination of charges remaining in the water droplet.
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