连铸旋转电磁搅拌器电磁场分布数值模拟

以有限元分析法为基础，对连铸结晶器电磁搅拌过程进行了磁场数值模拟，结果表明：电磁场作用下结晶器纵向方向上低频磁场呈现两头大中间小的分布趋势，磁场的峰值出现在与搅拌器中心对应位置附近；电磁力由铸坯外表面向中心液芯处衰减；随着低频电流的增加，钢液中磁感应强度和电磁力增大，但磁感应强度和电磁力的分布不受线圈电流的影响；随着电源频率的增加，钢液中磁感应强度和电磁力减小，且磁感应强度和电磁力的分布不受电源频率的影响。

Numerical Simulation of Magnetic Field Distribution of Rotating Electromagnetic Stirrer for Continuous Casting Machines

Based on finite element analysis, the magnetic field is simulated numerically during the stirring in the mold of continuous casters. The result shows the magnetic field intensity in the center of the mold is larger than that in the two ends of the mold in longitudinal direction. The peak value of the magnetic field occurs near the position corresponding to the center of the stirrer. Electromagnetic force becomes smaller from the outside surface of slabs to the center. The magnetic field intensity and electromagnetic force increase with the increase of low-frequency electric current, but the distribution of the magnetic field intensity and electromagnetic force is not influenced by the electric current. The magnetic field intensity and electromagnetic force in the liquid steel become smaller with the increasing of the frequency of the power supply, but the distribution of the magnetic field and electromagnetic force is not influenced by the frequency of the power supply.