GTAW焊电弧中传热与流动的数值模拟

Numerical Simulation on Heat Transfer and Fluid Flow of the Arc in Gas Tungsten Arc Welding

通过对GTAW焊电弧等离子体传热与流动的数值模拟，得到电弧热场、流场以及压力场在三维空间的分布特征。结果表明：温度值在电极端部正下方达到最大，压力最大的地方流速最小，且热场的计算结果与实测数据基本一致。

By numerical simulation of heat transfer and fluid flow for GTAW arc, the distribution of temperature, velocity and pressure of the arc plasma in the arc space are obtained. Results indicate that the maximum value of temperature in the whole arc space exists around the electrode tip. However, maximum pressure is found at the velocity stagnation, which is above the workpiece. Comparison between predicted temperature and moasured one in arc region shows a good agreement.