影响线性电磁搅拌流场分布的电参数分析

利用ANSYS56软件对单侧线性电磁搅拌作用下的流场分布进行了数值模拟,分析了搅拌器的电参数对钢液流动状况的影响·结果表明,当其他条件一定时,电流的增大可明显提高搅拌作用的强度,扩大搅拌作用的区域·磁场在钢液中的衰减速度应用穿透深度来衡量,其数值大小不但与电流频率有关,而且还与搅拌器的极距有关·当极距小于04m时,电流频率对穿透深度的影响不大;而当极距大于04m时,随电流频率的增加,磁场在钢液中的穿透深度逐渐减小·但电流频率的增加,使钢液内的磁感应强度和电磁力增大,有利于提高搅拌作用的强度,扩大搅拌作用的区域·

Influence of Current Parameters in the Stirrer on the Flow Field During Linear Electromagnetic Stirring

ANSYS?5 6 software was used to simulate the flow field during linear electromagnetic stirring, and the influence of the current parameters in the stirrer on the flow behavior of the molten steel were investigated. The results show that, with the increasing of the current intensity, the stirring intensity increases and the stirring zone expands. The penetration depth should be used to measure the decay of the electromagnetic field in the molten steel,which depends not only on the current frequency but also on the polar pitch of the stirrer. When the polar pitch is less than 0 4?m,the current frequency has little influence on the penetration depth. But when the polar pitch is larger than 0 4?m, the penetration depth will decrease with the increasing of the current frequency significantly. Moreover,the higher the current frequency used, the stronger stirring intensity and the larger stirring zone can be obtained.