Analysis on the choosing of test electrode for lightning current metal ablation experiments
Analysis on the choosing of test electrode for lightning current metal ablation experiments
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DOI：
10.1109/iclp.2016.7791402
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
Yakun Liu;Hailiang Xia;Z. Fu;Xin Gao;Baoquan Liu
中科院分区：
文献类型：
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作者：
Yakun Liu;Hailiang Xia;Z. Fu;Xin Gao;Baoquan Liu
在模拟雷电金属烧蚀实验中，电极对金属烧蚀面积和深度有影响。在本研究中，首先研究了电极材料以减少电极射流。然后采用直径分别为6、8和10mm的半球电极、半椭球电极和锥形电极9种不同形状的实验电极，研究了模拟长持续电流对金属烧蚀结果的影响。结果表明：锥形电极的金属烧蚀面积和烧蚀深度最严重，半椭球电极次之，半球形电极次之；对于相同形状的电极，金属烧蚀面积和深度随直径的增大而减小。通过ansys和COMSOL Multiphysics有限元数值分析软件对初始电场强度分布、后续动态电子密度和电子能量密度分布进行分析，合理解释了不同电极形状导致的不同烧蚀结果。
Metal ablation area and depth are affected by electrodes used in simulated lightning metal ablation experiment. In this study, electrode materials are firstly investigated to decrease electrode jet. Then nine different shapes of experiment electrodes, which are hemisphere electrode, semi-ellipsoid electrode and cone electrode with three different diameters of 6, 8 and 10mm respectively, are used to investigate the influences on metal ablation results with simulated long continuing current. The results show that, using cone electrode leads to the severest metal ablation results both in ablation area and depth, followed by using semi-ellipsoid electrode and hemisphere electrode. For electrodes of same shape, metal ablation area and depth decrease with its diameter increasing. The different ablation results caused by different shapes of electrodes are properly explained with initial electric field strength distribution analysis, subsequent dynamic electron density and electron energy density distribution analysis by the finite-element numerical analysis software of ANASYS and COMSOL Multiphysics.