细钨丝预热和高压电极极性对真空电爆丝能量特性的影响
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
摘要：
给出了真空中钨丝电爆炸的实验和数值研究结果。使用高压电极的正或负极性，在有和没有预热丝的情况下进行实验。示出预热，以增加能量沉积在线芯由于较长的电阻加热阶段。在单线和线阵列实验中都观察到了这种效果。采用半经验的宽范围状态方程，考虑钨的熔化和汽化，通过一维数值模拟研究了爆炸过程中丝材相态的演变。
英文摘要：
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.
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