水中大电流脉冲放电的激波传播特性

Shock Wave Propagation Characteristics of Pulsed High-current Discharge in Water

水中大电流脉冲放电伴随着强电磁场与机械冲击,导致近场的激波特性难以直接测量。为了探究水中大电流脉冲放电激波的传播特性,提出了基于经典水中爆炸经验公式的激波传播特性模型。从动力学角度描述了水中脉冲放电一次及二次激波的产生过程,建立了放电综合试验平台。借助阴影法与高速摄像技术捕捉了激波传播过程,分析图像并联立Tait方程和Rankine-Hugoniot方程得到了激波峰值特性。通过压力传感器获取不同位置激波并对模型适用性进行了评估,结果表明该模型可用于描述水中大电流脉冲放电激波的近场及远场传播特性,能够为激波的工业应用提供理论指导。

Pulsed high-current discharge in water is accompanied by strong electromagnetic field and mechanical shock, which makes it difficult to directly measure the near-field shock characteristics. In order to explore the propagation characteristics of shock wave in underwater pulsed high-current discharge, a shock propagation characteristic model based on the classical empirical formula of underwater explosion was proposed. The generation process of first and second shock waves in underwater pulsed high-current discharge was described from the perspective of dynamics. A comprehensive discharge test platform was established. The propagation process of shock wave was captured by the shadow method and high-speed camera technology. The peak value of shock wave was obtained by combining the Tait equation and Rankine-Hugoniot equation through image analysis. The shock waves at different positions were obtained by pressure sensors, and the applicability of the model was evaluated. The results show that the model can be used to describe the propagation characteristics of shock wave in underwater pulsed high-current discharge, and can provide theoretical guidance for the industrial application of shock wave.