外加稳态磁场作用下的焊接电弧数值仿真

周祥曼; 田启华; 杜义贤; 柏兴旺

doi:10.13433/j.cnki.1003-8728.20180124

外加稳态磁场作用下的焊接电弧数值仿真

doi: 10.13433/j.cnki.1003-8728.20180124

周祥曼^1,2,
田启华^1,2, ,,
杜义贤^1,2,
柏兴旺³

1.
三峡大学水电机械设备设计与维护湖北省重点实验室, 湖北宜昌 443002;
2.
三峡大学机械与动力学院, 湖北宜昌 443002;
3.
南华大学机械工程学院, 湖南衡阳 421001

基金项目:

国家自然科学基金项目（51705287，51475265，51775308）资助

详细信息

作者简介:
周祥曼(1983-),讲师,博士,研究方向为电弧增材制造工艺及其多尺度仿真,zhouxman@ctgu.edu.cn

通讯作者:
田启华,教授,博士,tqh@ctgu.edu.cn

计量
- 文章访问数: 179
- HTML全文浏览量: 33
- PDF下载量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2017-11-15
- 刊出日期: 2018-07-05

Numerical Simulation of Welding Arc under External Static Magnetic Field

1.
Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Hubei Yichang 443002, China;
2.
College of Mechanical and Power Engineering, China Three Gorges University, Hubei Yichang 443002, China;
3.
School of Mechanical Engineering, University of South China, Hu'nan Hengyang 421001, China

摘要

摘要: 为了揭示外加静态磁场对焊接电弧形态及传热传质的影响规律，建立了焊接电弧的数值模型，对比分析了普通熔积、外加纵向磁场作用以及横向磁场作用下的电弧传热传质过程。结果显示：相比普通熔积，外加纵向磁场作用下，靠近基板的位置电流密度和温度减小，电弧的温度和压强峰值减小，中心处出现负压；外加横向磁场作用下，电弧整体偏向一侧，电弧中心的电流密度、温度和电弧压强都小于未施加外加磁场情况。外加磁场对电弧形态及传热传质的改变，将导致电弧和金属之间的热和力相互作用改变，从而使得熔池的传热传质过程相应的发生改变。
- 外加磁场 /
- 焊接电弧 /
- 数值模拟 /
- 雷诺数
Abstract: To reveal the influence of static magnetic field on the shape, heat and mass transfer of welding arc, the numerical model of a welding arc is established to compare and analyze its heat and mass transfer processes in the conventional welding, external longitudinal magnetic field and transverse magnetic field-assisted welding. The analysis results show that the longitudinal magnetic field can decrease the current density and temperature of the welding arc near its substrate. In addition, the peak temperature and pressure of the welding arc are reduced and the negative pressure appears at the center of the welding arc under the external longitudinal magnetic field. The transverse magnetic field makes the welding arc inclined to one side; the current density, temperature and arc pressure at the center of the welding arc are smaller when no external longitudinal magnetic field is applied. The changes in arc shape, heat transfer and mass transfer result in the heat and force interaction between welding arc and metal and further result in changes in heat and mass transfer processes of the molten pool.
- external longitudinal magnetic field /
- welding arc /
- numerical simulation /
- Reynold number

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参考文献(22)

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