水下大电流脉冲放电仿真与实验(英文)

Simulation and Experiment of Underwater High Current Pulse Discharge

水下大电流脉冲放电在电极间形成高导电性等离子体通道。由于放电时间极短,通道中的物理、化学过程复杂,因此对放电通道和流体力学参数的研究变得异常困难。对放电通道用基尔霍夫方程式和流体力学方程式进行了模型描述,该模型揭示了通道电阻、放电电流以及压力脉冲的变化规律;并将实验数据与模型数值计算结果进行了对比。结果表明该模型与实验值有良好的一致性,能够对水下大电流脉冲放电参数进行数值预判。

Underwater high-current pulse discharge results in a highly conductive plasma channel between the electrodes.Due to the ultrashort discharge duration and the complicated physical or chemical process,it is very difficult to research on the discharge channel and hydrodynamics characteristics.In this paper the dynamic process of the discharge channel was described by means of Kirchhoff equation and hydrodynamic equations.A new model was developed to reveal the characteristics of the channel resistance,the radius of plasma discharge channel,the circuit current and the pressure pulse amplitude.The corresponding calculation results from this new developed model were compared with expermimental data.The results show that the calculated parameters are in accordance with the expermimental data,and the developed model can be used for the estimation of the characteristic of underwater pulse discharge.