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Analysis on the Choosing of Test Electrode for Lightning Current Metal Ablation Experiments

机译：雷电电流消融实验选择电极选择分析

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摘要

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.
机译：金属消融面积和深度都受到在模拟雷电金属消融实验中使用的电极的影响。在这项研究中，电极材料被首先调查，以减少电极射流。然后实验电极，这些电极是半球电极，半椭圆体电极和具有三个不同直径的6，分别为8到10mm锥形电极的九个不同的形状，用于研究与模拟的长持续电流在金属消融的结果的影响。结果表明，使用锥形电极引线为最严格的金属消融结果无论在消融面积和深度，随后使用半椭圆体电极和电极半球。为相同的形状，金属消融区域，并与它的直径增加的深度减小的电极。引起的电极不同的形状的不同的消融结果正确地与初始电场强度分布分析，随后的动态电子密度和电子的能量密度分布分析由ANASYS和COMSOL Multiphysics软件的有限元数值分析软件进行说明。

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