摘要
通过将麦克斯韦方程、纳维-斯托克斯方程及能量平衡方程相结合,提出了一个描述单电极直流电弧炉炉内熔体温度场及流场的数学模型。通过实验室规模的直流电孤炉的温度实测和模型计算表明,熔体内的温度分布是均匀的,电弧附近的一定区域除外;熔体的流动是高度紊流的;操作电流为0.8～1.2kA时,热浮力是控制熔体流动的主导力量。
A mathematical model was developed to represent the temperature/velocity field in a metal bath of DC arc furnace by combining Maxwell's and Navier-Stokes'equations with heat balance equation. The lab-scale results of temperature measurement and calculation by the model showed that a uniform temperature distribution is obtained in the metal bath except a certain area in the vicinity of the arc invoked.and the melt flow is highly turbulent. It was found that the thermal buoyancy may dominate well the melt flow as the operating current is in the range of 0. 8-1. 2kA.
基金
国家自然科学基金
关键词
直流电弧炉
温度场
流场
熔体
DC arc furnace,temperature field,velocity field,molten metal.
