电弧流场分布特征的数值分析

Numerical Simulation of Arc Flow Field Distribution Feature

建立了微束等离子弧有限元模型,利用ANSYS软件对微束等离子弧的流场分布进行了数值模拟分析。结果表明,在计算时间内,从不稳定到稳定的过渡阶段,电弧纵向流场的最大流速不断地增加,最大流速出现在喷嘴附近。阴极附近与阳极附近的微束等离子弧焊电弧横端面的等离子体流向相反。

Micro beam plasma arc finite element model was established, and the flow field distribution of micro plasma arc was analyzed by software ANSYS, The simulation results show that： during the calculation of the period of time, from unstable to stable transition stage, the maximum arc longitudinal velocity increases constantly, and the maximum velocity appears in the vicinity of the nozzles. The plasma flow direction of the micro beam plasma arc welding near the anode is opposite to that near the cathode.