The intensity of the shockwave generated by the high-current pulse discharge in the liquid is mainly determined by the deposited energy during the accelerated expansion stage of the arc plasma channel. Under the same discharge condition, there is randomness in the shape of the arc channel. Generally, longer arc channels have larger impedance, which can obtain more energy and generate stronger shockwaves. In this article, a comprehensive test platform for high-current pulse discharge in liquid was established; the voltage, current, and far-field shockwaves were measured; and the development images of the arc channel were taken. Considering the influence of temperature, channel expansion, and radiant energy, a calculation method of electrohydraulic shockwaves based on the improved arc impedance model was established. The initial values and parameters of the model were selected by comparison with the test results to ensure their accuracy. The arc channel current, time-varying resistance, deposition energy, and far-field shockwaves were calculated and compared with the test results to verify the rationality of the model. The calculation of electrohydraulic shockwaves based on the improved arc impedance model can provide theoretical guidance for optimizing the industrial application of shockwaves.

中文翻译：

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基于改进电弧阻抗模型的电液冲击波计算

液体中大电流脉冲放电产生的冲击波强度主要由电弧等离子体通道加速膨胀阶段沉积的能量决定。在相同的放电条件下，电弧通道的形状存在随机性。通常，较长的电弧通道具有较大的阻抗，可以获得更多的能量并产生更强的冲击波。本文建立了液体大电流脉冲放电综合测试平台；测量了电压、电流和远场冲击波；并拍摄了弧形通道的展开图像。考虑温度、通道膨胀和辐射能的影响，建立了一种基于改进电弧阻抗模型的电液冲击波计算方法。模型的初始值和参数通过与试验结果的比较来选择，以保证其准确性。计算了电弧通道电流、时变电阻、沉积能量和远场冲击波，并与试验结果进行了比较，验证了模型的合理性。基于改进电弧阻抗模型的电液冲击波计算可以为优化冲击波的工业应用提供理论指导。