正极性纳秒脉冲下水中流注放电仿真研究  

Simulation of Streamer Discharge in Water underPositive Nanosecond Pulse Voltage

作　　者：高云天 杨智博 郑新裕 阳国庆 GAO Yuntian;YANG Zhibo;ZHENG Xinyu;YANG Guoqing(Key Laboratory of Modern Power System Simulation Control and New Green Power Technology(Northeast Electric Power University),Jilin Jilin 132012;Cooper(Ningbo)Electric Co.Ltd.,Ningbo Zhejiang 315000)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部门重点实验室(东北电力大学),吉林吉林132012 [2]库柏(宁波)电气有限公司,浙江宁波315000

出　　处：《东北电力大学学报》2023年第3期31-38,共8页Journal of Northeast Electric Power University

基　　金：吉林省自然科学基金面上项目(20230101340JC)。

摘　　要：基于场致电离机理,建立二维轴对称流体模型,仿真研究正极性纳秒脉冲电压下水中针-板电极流注放电的发展过程。得到不同的外施电压幅值、脉冲上升沿时间下水中流注放电的形貌、电场强度与空间电荷密度的时空分布。仿真结果表明:随着外施电压幅值升高,放电通道的电荷量和速度变大;脉冲上升沿变陡使得放电通道半径增大,对应的最大电场强度减小。仿真显示脉冲放电下水温有所升高,但放电没有明显的汽化现象。文中的研究结论有助于加深对纳秒脉冲下水中流注放电起始、发展过程的认识以及对液体电介质放电机制的理解。Based on the mechanism of field ionization,a two-dimensional axisymmetric fluid model is established to simulate the development of needle plate electrode streamer discharge in water under positive nanosecond pulse voltage.The temporal and spatial distributions of streamer discharge morphology,electric field intensity and space charge density in water with different applied voltage amplitude and pulse rising time were obtained.The simulation results show that with the increase of applied voltage amplitude,the amount and velocity of charge in the discharge channel increase;When the rising edge of the pulse becomes steeper,the radius of the discharge channel increases and the corresponding maximum electric field intensity decreases.The simulation results show that the water temperature in the pulsed discharge increases,but there is no obvious vaporization phenomenon.The conclusions of this paper are helpful to understand the initiation and development of streamer discharge in water with nanosecond pulse and the mechanism of liquid dielectric discharge.

关 键 词：水中脉冲放电 等离子体通道 仿真模型 流注放电 

分 类 号：TM215[一般工业技术—材料科学与工程]