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The Effects of Preheating of a Fine Tungsten Wire and the Polarity of a High-Voltage Electrode on the Energy Characteristics of an Electrically Exploded Wire in Vacuum

机译:细钨丝的预热和高压电极的极性对真空中电爆炸丝的能量特性的影响

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摘要

Results obtained from experimental and numerical studies of tungsten wires electrical explosion in vacuum are presented. The experiments were performed both with and without preheating of the wires, using positive or negative polarity of a high-voltage electrode. Preheating is shown to increase energy deposition in the wire core due to a longer resistive heating stage. The effect was observed both in single wire and wire array experiments. The evolution of the phase state of the wire material during explosion was examined by means of one-dimensional numerical simulation using a semiempirical wide-range equation of state describing the properties of tungsten with allowance made for melting and vaporization.
机译:给出了从钨丝在真空中电爆炸的实验和数值研究获得的结果。使用高压电极的正极性或负极性,在预热和不预热导线的情况下进行实验。由于较长的电阻加热阶段,预热显示会增加线芯中的能量沉积。在单线和线阵列实验中均观察到了这种效果。通过一维数值模拟,使用描述钨特性的半经验宽范围状态方程,通过一维数值模拟检查了金属丝材料在爆炸过程中的相态演变,并考虑了熔化和汽化的余地。

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