利用旋转磁场特征变换模型方程并结合边界更新法, 提出一种计算旋转型电磁搅拌器在钢连铸坯中产生的电磁力场的方法. 用该方法计算了考虑铁心影响的不同尺寸钢连铸方坯内的电磁场. 模拟结果与实验数据符合良好,同时详细给出了旋转电磁场在搅拌区域内产生的电磁力的空间分布,并分析了不同电流、频率等参数对电磁力分布的影响.
A new model and a numerical method are developed to solve the electromagnetic force field produced by the rotating magnetic field in electromagnetic stirring of processing. The model equations are transformed using the characteristics of rotating magnetic field, and the boundary renewal method is applied to boundary conditions. Using the present model, the electromagnetic force fields in different size billets considering the effect of iron core are computed. The three – dimensional distribution of electromagnetic forces are obtained in detail under the condition of variable parameters. The numerical results agree well with the experimental measurement.