磁场作用下的TIG电弧行为分析
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作者单位:

1.四川航天长征装备制造有限公司,成都 610100;2.成都航空职业技术学院,汽车工程学院,成都 610100

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TG444

基金项目:

四川省科技计划重点研发项目(2020YFG0197);成都航空职业技术学院自然科研项目(062029)


Analysis of TIG Arc Behavior Under the Effect of Magnetic Field
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Affiliation:

1.Sichuan Aerospace Changzheng Equipment Manufacturing Co. Ltd.,Chengdu 610100;2.Department of Automotive Engineering, Chengdu Aeronautic Polytechnic,Chengdu 610100

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    摘要:

    在磁流体动力学理论的基础上,针对外加纵向磁场作用下的钨极氩弧焊(TIG)电弧在旋转圆柱坐标系中建立了不同电流密度的数学模型。通过Fluent用户自定义函数进行编程开发,对其流场和电磁场进行耦合求解,得到了外加纵向磁场作用下的TIG电弧热场和流场的分布规律。结果表明,纵向磁场作用下的TIG电弧温度场呈现空心钟罩形态,并表现为双峰分布,在近阳极表面位置出现“低温腔”,且电流密度越大,“低温腔”越大;其次,纵向磁场的作用造成阳极表面的压力变化也呈现双峰分布,其峰值压力较无磁场作用时下降了约70%,且电流密度越大下降的越多。

    Abstract:

    Based on the theory of magnetohydrodynamics, the mathematical models of different current densities for TIG (tungsten inert gas) arc with external longitudinal magnetic field were established in the rotating cylindrical coordinate system. The flow field and electromagnetic field were coupled by fluent user-defined function, and the results show that the temperature field of TIG arc under longitudinal magnetic field presents the shape of hollow bell, and the distribution is bimodal, but a zone of low temperature occurs near the anode. With the increasing of current density, zone of "low temperature cavity" becomes larger near the anode surface. In addition, effect of longitudinal magnetic field on the pressure of anode surface is also distributed in double peak, and the peak pressure decreases by about 70% compared with that without magnetic field. And the dropping become sharper with the increasing of current density.

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张晓鸿,司中祺,范翼飞,文远华,张万春.磁场作用下的TIG电弧行为分析[J].宇航材料工艺,2021,51(3):44-48.

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  • 收稿日期:2020-09-20
  • 最后修改日期:2021-04-09
  • 录用日期:2020-10-20
  • 在线发布日期: 2021-06-03
  • 出版日期:
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