电磁制动对CSP漏斗形结晶器开浇过程影响的数值模拟  

Numerical Simulation of Transient Fluid Flow During Casting Start Period in the CSP Funnel-Type Mold With Electromagnetic Brake

作　　者：徐绵广[1] 刘和平[2] 项利[2] 仇圣桃[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《钢铁》2014年第1期28-33,共6页Iron and Steel

基　　金：国家自然科学基金资助项目(50934009)

摘　　要：建立了描述电磁制动(EMBr)下CSP漏斗形结晶器开浇过程暂态流动现象的三维数学模型,研究不同磁场强度对开浇过程中结晶器内流场影响。利用流体体积方法(VOF)捕捉钢液-空气界面。采用动网格模型实现引锭杆的移动。研究结果表明:电磁场可显著抑制钢液湍流流动,降低引锭杆启动瞬间的弯月面波动;开浇过程电磁制动的使用可改善拉坯过程中结晶器内钢液流态;电磁制动的使用可将自由稳定时间提前约10s;使用电磁制动可明显减轻漏斗形结晶器内钢液偏流现象。A three-dimensional mathematical model was established to investigate the transient flow phenomena of molten steel during the casting start period with electromagnetic brake （EMBr）. An algorithm of VOF has been employed to simulate the air/steel interface. Use dynamic mesh to control the movement of dummy bar. The results show that, the electromagnetic field can significantly restrain the turbulent flow of molten steel and the fluctuation of the surface at the time of the dummy bar moving; the EMBr can optimize the flow pattern in the mold; the stabilization of the free surface may come earlier by 10 seconds with EMBr; the EMBr provides a positive effect to reduce the flow deviation of molten steel in the funnel-type mould.

关 键 词：CSP 薄板坯连铸 漏斗形结晶器 电磁制动 数值模拟 

分 类 号：TF777[冶金工程—钢铁冶金]