电磁制动对CSP漏斗形结晶器开浇过程影响的数值模拟

钢铁, 2014, 49(1): 28-33.

电磁制动对CSP漏斗形结晶器开浇过程影响的数值模拟

徐绵广 ^1, , 刘和平 ^2, , 项利 ^3, , 仇圣桃 ^4,

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

3.钢铁研究总院连铸技术国家工程研究中心,北京100081

4.钢铁研究总院连铸技术国家工程研究中心,北京100081

基金项目: 国家自然科学基金资助项目(50934009)

关键词： CSP , 薄板坯连铸 , 漏斗形结晶器 , 电磁制动 , 数值模拟

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

XU Mian-guang ^1, , LIU He-ping ^2, , XIANG Li ^3, , QIU Sheng-tao ^4,

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

3.钢铁研究总院连铸技术国家工程研究中心,北京100081

4.钢铁研究总院连铸技术国家工程研究中心,北京100081

Keywords： compact strip production , thin slab continuous casting , funnel type mold , electromagnetic brake , numerical simulation

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.

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