Numerical simulation of the arc pressure in gas tungsten arc welding
Numerical simulation of the arc pressure in gas tungsten arc welding
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DOI：
10.1016/0924-0136(95)02190-6
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发表时间：
1996-09
影响因子：
6.3
通讯作者：
H. Fan;Y. Shi
中科院分区：
文献类型：
--
作者：
H. Fan;Y. Shi
建立了钨极氩弧焊电弧传热和流动的二维轴对称数值模型。模型中考虑了电极尖端的几何形状，电流连续性方程的求解中包括阴极和弧柱区域。采用SIMPLE算法求解磁流体动力学方程。电弧柱温度的计算结果与实验结果吻合较好;计算结果表明，电弧参数（电流密度、电磁力和速度）的分布较好地反映了电弧压力的产生机理。利用建立的电弧模型，分析了电流、电极锥角和弧长对电弧压力分布的影响。
A two-dimensional axisymmetric numerical model has been developed to describe the heat transfer and fluid flow in the gas tungsten welding arc. The electrode-tip geometry is considered in the model and the cathode and arc column regions are included in the solution of the current continuity equation. The magneto-hydrodynamics equations are solved using the SIMPLE algorithm. The prediction of the arc column temperatures is in fair agreement with experimental results; moreover, the computed results indicate that the distributions of arc parameters such as current density, electromagnetic force and velocities, reflect well the generating mechanism of the arc pressure. In addition, the effects of the current, the electrode-tip angle and the arc length on the arc pressure distribution are analyzed by the use of the arc model that has been developed.