作　　者： ; ; ; ; ; ;

机构地区： 北京科技大学

出　　处： 《北京科技大学学报》 2012年第11期1275-1281,共7页

摘　　要： 针对特定设计的搅拌器建立了包含钢液流动、传热和电磁场的三维耦合非稳态数学模型,计算了CSP薄板坯二冷区液芯在电磁搅拌作用下的传输行为,其中考虑了感应电流和搅拌器线圈上下端部对磁场强度的影响.结果表明:电磁力改变了铸坯液相穴内钢液流场,对钢液起到水平搅拌作用;搅拌器产生的磁场不均匀,在不同厚度处幅度和相位都不同,且幅度随着穿透深度的增加而减小;感应磁场移动方向与外部磁场相同且不宜忽略;单侧搅拌器对铸坯内钢液搅拌比较均匀. A three-dimensional unsteady mathematical model,which is coupled with the turbulent flow,temperature field and magnetic field,was established to analyze the special stirrer.Then,the fluid flow in the secondary cooling zone of a thin slab by compact strip production（CSP） was calculated under electromagnetic stirring,and the effects of induced current and the ends of the stirrer coil on the magnetic field were considered in this calculation.The results show that the flow field of molten steel in the secondary cooling zone is changed by electromagnetic force,leading to horizontal recirculation flow within the stirring zone.The magnetic field generated by the stirrer is uneven because its magnitude and phase vary with penetration depth,and its magnitude decreases with increasing penetration depth.The induced magnetic field caused by fluid motion linearly moves in the direction of the external field and should not be ignored.Molten steel could be uniformly stirred by a one-sided stirrer.

关 键 词： 连铸 板坯 电磁搅拌 数值分析 速度分布 凝固

领　　域： [冶金工程]