Three‐dimensional electromagnetic thermal fluid simulation of re‐strike phenomenon in magnetically driven arc between parallel electrodes with edges
Three‐dimensional electromagnetic thermal fluid simulation of re‐strike phenomenon in magnetically driven arc between parallel electrodes with edges
复制标题
带边缘平行电极磁驱动电弧重引弧现象的三维电磁热流体模拟
DOI：
10.1002/tee.23118
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Ren;Z.;Kokubo;S.;Maeda;Y.;Yamamoto;S. and Iwao;T.
磁驱动电弧在具有边缘的平行电极之间不能平滑地前进。当弧柱和阴极斑点向前移动时，阳极斑点停滞在阳极表面上。根据实验结果，当电弧柱移动靠近阳极表面时，或者高温气体与阳极接触时，会出现新的阳极斑点并发生电击穿。与此同时，原来的阳极斑点消失了。这就是所谓的再罢工现象。此外，使用带通滤波器（520 nm）可以观察到，每当出现新的阳极点时，都会产生大量的Cu蒸气。由于铜蒸气大大增加了电弧的辐射发射，并且在不同浓度下对气体的电导率具有不同的影响，因此本文提出了考虑电极金属蒸气的三维电磁热流体模拟程序。根据实验数据，通过控制阳极表面控制体积的电导率，可以模拟再冲击过程。此外，还对电弧等离子体、原始阳极斑面积和重燃点面积的物理性质进行了分析，以阐明重燃现象发生的条件。结果表明，电弧形态受电极射流的影响，导致重燃点与弧柱之间的电场密度增大，从而导致重燃现象的发生。© 2020日本电气工程师协会。由John Wiley & Sons公司出版
A magnetically driven arc does not advance smoothly between parallel electrodes with edges. The anode spot stagnates on the anode surface when the arc column and cathode spot move forward. According to experimental results, when the arc column moves closer to the anode surface, or a high‐temperature gas comes into contact with the anode, a new anode spot appears and electrical breakdown occurs. Meanwhile, the original anode spot disappears. It is well known as the re‐strike phenomenon. Also, it can be observed using a bandpass filter (520 nm) that a large amount of Cu vapor is generated whenever a new anode spot appears. Because the Cu vapor considerably increases the arc's radiative emission and has a dissimilar effect on the gas's electrical conductivity at different concentrations, a three‐dimensional electromagnetic thermal fluid simulation program that considers the metal vapor from the electrodes is proposed in this paper. Based on the experimental figures, it is able to simulate the re‐strike process by controlling the electrical conductivity of the control volume at the anode surface. In addition, the physical properties of the arc plasma, the original anode spot area, and the re‐strike point area are analyzed, in order to elucidate the occurrence conditions of the re‐strike phenomenon. The results show that the arc form is affected by the electrode jets, which leads to an increase in the electric field density between the re‐strike point and the arc column, thereby causing the re‐strike phenomenon to occur. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
金属蒸气对脉冲TIG焊瞬态电弧温度分布的影响
DOI：
10.2207/qjjws.27.8s
发表时间：
2009
期刊：
Quarterly Journal of The Japan Welding Society
影响因子：
--
作者：
Yusuke Mori;Toru Iwo;M. Yumoto;S. Tashiro;Manabu Tanaka
通讯作者：
Manabu Tanaka
大气压下平行平板电极边缘间电磁驱动电弧燃烧的传播特性
影响因子：
--
作者：
H. Ohno;H. Ito;Tomio Tange;K. Naito;Y. Yokomizu;T. Matsumura
通讯作者：
T. Matsumura