摘要
以直流钨极氩弧焊电弧为研究对象，建立了轴对称两维数值模型．模型中考虑了阴极几何形状，电流密度计算包括了阴极区和弧柱区．模型对一组磁流体动力学方程组的求解，采用了ＳＩＭＰＬＥ算法，所得的电弧弧柱温度分布与实验吻合良好．在此基础上，运用所建立的电弧模型，详细分析了焊接电流、钨极端头锥角及弧长对电弧阳极电流密度分布的影响。
A two dimensional axisymmetric numerical model is developed to describe heat transfer and fluid flow in inert gas tungsten welding arc. The electrode tip geometry is considered in the model, and the cathode and arc column regions are included in solution of the current continuity equation. Magneto hydro dynamics equations are solved using the SIMPLE algorithm. Prediction of arc column temperatures is in fair agreement with the experiment results. Moreover, the effects of current, electrode tip angle and arc length on the anode current density distribution are analysed in detail using the proposed arc model, and the results agree well with the experimental data.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1997年第4期77-82,92,共7页
Journal of Xi'an Jiaotong University
关键词
钨极氩弧焊
电弧
阳极
电流密度
数值计算
inert gas tungsten arc welding welding arc numerical model magneto hydro dynamics
