摘要
建立了板坯结晶器电磁搅拌过程电磁场与流场计算的三维数学模型,采用SIMPLER方法对2对极和4对极条件下的电磁场与流场进行了数值求解。结果表明:磁感应强度B和电磁力F都呈现出关于结晶器中心对称的规律;结晶器两侧每一对N、S极之间的水平面内,电磁力都呈现圆周状分布的规律;板坯宽面边缘的电磁力较大,而板坯窄面边缘和中心区域的电磁力较小;与4对极相比,2对极产生的磁感应强度和电磁力大,钢液的流速大,搅拌强度大;无结晶器电磁搅拌时,铸坯边缘的纵断面的流场主要分成四个回流区;而有结晶器电磁搅拌时,左侧的两个回流区基本消失,右侧两个回流区减小。
A three dimensional mathematical model for electromagnetic field and fluid flow in slab continuous casting mold with mold electromagnetic stirring（M-EMS） was built. Electromagnetic field and fluid flow in 2-pole pairs and 4-pole pairs have been studied using the SIMPLER algorithm. The results show that distribution of magnetic flux density B and electromagnetic force F present a centrosymmetric property in the mold. F distributes circumferentially in the horizontal plane between each pairs of N pole and S pole at two sides of the mold. F is bigger at edge of broad face than that at edge of narrow face or at centre of slab. Compared with 4-pole pairs, higher B, F and velocities can be obtained in molten steel with 2-pole pairs. There are four circumfluence regions in the longitudinal section near the strand wide surface without M-EMS, while two circumfluence regions on the left side almost vanish and two circumfluence regions on the right side become smaller with M-EMS.
出处
《连铸》
2010年第3期1-5,15,共6页
Continuous Casting
基金
国家自然科学基金
宝钢联合基金资助项目(50174031)
关键词
板坯连铸
结晶器
电磁搅拌
流场
数值模拟
slab continuous casting
mold
electromagnetic stirring
fluid flow
numerical simulation
