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本文采用磁流体动力学(MHD)模型对直流等离子体自由燃烧电弧和电弧炉内部的流动与传热进行了数值模拟研究。通过对基于磁矢量势描述的电磁场方程组和流体力学方程组的耦合迭代计算,求解得到了流体的温度场和速度场等,计算结果清晰地反映出等离子体电弧的高温阴极射流现象,并与同行的实验和数值结果进行了对比。本模拟方法和结果对于电弧炉的工业应用和优化设计有重要的指导意义。
In this paper, the MHD model is used to simulate the flow and heat transfer inside a free-burning arc of a DC plasma arc and in an EAF. The temperature field and velocity field of the fluid are obtained through iterative coupling iteration of electromagnetic field equations and hydrodynamics equations based on the magnetic vector potential. The calculation results clearly show the high temperature cathode jets in the plasma arc, Peer experiments and numerical results were compared. The simulation method and results have important guiding significance for the industrial application and optimization design of electric arc furnace.