Discharge channel development of microsecond tungsten wire explosion in air
Discharge channel development of microsecond tungsten wire explosion in air
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DOI：
10.1063/1.5081012
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发表时间：
2019-02-01
影响因子：
2.2
通讯作者：
Qiu, Aici
中科院分区：
文献类型：
--
作者：
Liu, Qiaojue;Yao, Weibo;Qiu, Aici
研究了微秒电爆炸钨在空气中的放电通道发展。采用微秒脉冲电流源对长40厘米、直径0.3毫米的钨丝进行了电爆炸实验。在26 kV电压下，一个6亩F电容器的存储能量为2028 J，不足以使钨丝蒸发。我们提出了总横截面积和颗粒边界面积这两个参数来定量描述泄流通道的发育。我们还采用了图像处理的方法来研究电线爆炸过程中整个放电通道的发展。结果表明，电爆炸的趋势是由表面到核心逐层发生，通道向外扩张的速度逐渐减小。结果还表明，上电极和下电极的放电通道发展有明显的区别。在电爆炸过程中，颗粒边界面积呈近似指数增长，而总横截面积呈线性增长至1.43 ms后减小，这是由于放电通道中形成空心区域所致。由AIP出版社授权出版。
The discharge channel development of microsecond electrical exploding tungsten in air was investigated. A microsecond pulsed current source was used to trigger the electrical explosion of tungsten wires with a length of 40 cm and a diameter of 0.3 mm. Charged with a 26 kV voltage, a 6 mu F capacitor possessed a stored energy of 2028 J, which was not enough to vaporize the tungsten wire. We proposed two parameters, the total cross-sectional area and the granular border area, to quantitatively describe the discharge channel development. We also adopted an image processing method to study the entire discharge channel development throughout the wire explosion. Evident results suggested that the trend of the electrical explosion was layer by layer from the surface to the core, and the outward expanding speed of the channel was gradually decreasing. The results also demonstrated clear distinction between the discharge channel developments at upper and lower electrodes. During the electrical explosion, the granular border area increased in an approximate exponential way, while the total cross-sectional area increased linearly until 1.43 ms and then decreased, which was caused by hollow regions formed in the discharge channel. Published under license by AIP Publishing.