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基于分形理论的水中流注放电仿真 被引量:12

Fractal Simulation of Streamer Discharge in Liquid Water
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摘要 水中流注放电的特性及流注发展机理研究对于污水处理、杀菌消毒、水下声源和高压绝缘具有重要的意义。基于分形理论,构建了考虑气泡生长过程的水中流注放电仿真模型,并仿真研究了不同电压幅值和溶液电导率下的放电特性。结果表明,随着外施电压和溶液电导率的增大,通道电荷量和流注发展速度均增大,而放电预击穿延时减小。计算得到的流注发展速度、预击穿延迟时间随水溶液电导率的变化等与已报道的实验相符。 The characteristics and mechanisms of streamer discharge in liquid water are of importance for the sewage treatment, sterilization, underwater plasma sound source and the insulation of high-voltage devices. We constructed a stochastic model of the streamer growth in the discharge in liquid water. The model was based on the fractal theory and considered the generation of the bubbles of liquid water. Moreover, the influences of both applied voltage and conductivity of liquid water on streamer discharge were investigated. It is found that, when the applied voltage or the conductivity increases, the quantity of channel charge and the velocity of streamer propagation increase, hut the pre-breakdown delay time decreases. The simulated time dependence of streamer velocity, the dependence of streamer mean velocity on applied voltage, and pre-breakdown delay time versus the conductivity agree well with the reported results in former literatures.
出处 《高电压技术》 EI CAS CSCD 北大核心 2012年第7期1556-1561,共6页 High Voltage Engineering
基金 国家自然科学基金(51077089)~~
关键词 水中放电 分形 气泡 流注发展速度 放电预击穿延时 仿真模型 discharge in liquid water fractal bubble velocity of streamer propagation prebreakdown delay time simulation model
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