水介质预击穿过程液相温度纹影诊断技术研究

Schlieren Diagnosis Technology for Liquid Temperature in the Pre-Breakdown Process of Water

为研究水中亚毫秒脉冲放电过程液相温度的变化,构建了适用于水中脉冲放电的纹影观测系统,提出了水中脉冲放电过程温度诊断系统的影响因素及标定方法,获得了水中脉冲放电过程温度场的径向分布。与有限元仿真对比分析表明,当径向距离小于0.9 mm时,纹影诊断温度相对于仿真结果的偏差小于8%,为水中脉冲放电机理研究提供了技术基础。

To study the change of liquid temperature in the process of sub-millisecond pulsed discharge in water,a schlieren observation system suitable for pulsed discharge in water was constructed.The influencing factors and calibration method of the temperature diagnosis system for the process of pulsed discharge in water were proposed,and the radial distribution of the temperature field during the pulsed discharge in water was obtained.Comparative analysis with the finite element simulation shows that when the radial distance is less than 0.9 mm,the deviation of the temperature based on the schlieren diagnosis from the simulation results is less than 8%.It provides a technical basis for the study of the mechanism of pulsed discharge in water.