电磁制动下结晶器内流体流动行为的数值研究  

Numerical Simulation of Fluid Flow in the Mold With Electromagnetic Brake

作　　者：陈芝会[1] 王恩刚[1] 雷洪[1] 赫冀成[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《钢铁》2008年第8期25-30,共6页Iron and Steel

基　　金：国家高新技术研究发展计划项目(2001AA337040);辽宁省科技攻关项目(2005221006);辽宁省青年人才基金项目(2005221004)

摘　　要：数值模拟了在电磁制动作用下结晶器内金属液的流动行为,并研究了诸如磁感应强度,水口出口角度和磁场位置等各种操作条件对电磁制动效果的影响。数值模拟结果表明:应用电磁制动使结晶器内的流场有很大的改变。施加0.5 T的磁场使结晶器内金属液的表面流速最小,这一计算结果与实验结果十分吻合。为此,应用磁场对结晶器内的流场进行控制,有必要在一定的浇注条件下优化磁感应强度的大小。当磁感应强度、拉坯速度和水口出口角度一定时,磁场位置与水口浸入深度之比有一最佳值,可达到理想的电磁制动效果。The numerical simulation study for the fluid flow in a slab caster mold with electromagnetic brake （EM- BR） is described. The influence of operation conditions, such as magnetic flux density, port angles of nozzle and position of magnetic field, on electromagnetic braking were simulated. The numerical results show that flow field in the mold is changed largely with EMBR. And the surface velocity of molten metal in the mold was minimal at a magnetic flux density of 0.5 T, it agreed well with measured surface level fluctuations in water modeling. So it is necessary to optimize the magnetic flux density for certain casting conditions. When the magnetic flux density, the casting speed and the port angles of nozzle are certain, there is an optimal ratio of the location of magnetic field to the immersion depth of nozzle. With such optimal ratio, the effect of electromagnetic brake is the best.

关 键 词：连铸 结晶器 电磁制动 操作条件 数值模拟 

分 类 号：TF777[冶金工程—钢铁冶金]