【摘要】 建立海水介质电弧放电极间两相流仿真模型，对极间气体分布和电场强度分布进行计算，并通过单脉冲放电实验装置对极间现象进行观测。结果表明：海水介质中放电1 ms时，电极尖端气体体积分数超过50%，极间场强升高约55%，导致击穿间隙显著增加。海水介质中极间气泡主要是阴极电化学反应产生的氢气，与自来水介质中电弧放电产生热气泡的机理存在显著差异，导致海水介质中等离子体发展模式不同。海水介质单脉冲电弧放电的研究揭示了海水介质中气泡产生机理和气泡与等离子体的相互作用机理，将指导海水环境中利用电弧等离子体进行高效切割。更多还原

【Abstract】 This paper establishes a two-phase flow simulation model of EAM in seawater dielectric,calculating the distribution of gas and electric field strength between electrodes. A singlepulse arc discharge observation experimental setup is also used to observe the phenomena between electrodes. The results show that after 1 ms of discharge in seawater,the gas volume fraction at the electrode tip exceeds 50%,causing a 55% increase in the electric field strength between the electrodes,which significantly increases the breakdown gap. The bubbles in seawater are primarily hydrogen bubbles generated by cathodic electrochemical reactions,a mechanism distinctly different from the thermal vapor bubbles generated by Joule heating in tap water. This leads to a difference in plasma development modes between the two mediums. The study on single pulse arc discharge in seawater reveals the bubble generation mechanism and the interaction between bubbles and plasma,guiding efficient electrical arc cutting in seawater environments.更多还原