连续铸造复合轧辊结晶器流场的数值模拟  

Numerical Simulation of Fluid Flow in Continuous Casting Mould for Compound Roll

作　　者：冯明杰[1] 王恩刚[1] 邓安元[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：《东北大学学报（自然科学版）》2006年第6期665-668,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2003AA331050)

摘　　要：采用湍流两方程模型,对连续铸造复合轧辊组合结晶器内钢液的流场进行了数值模拟研究,分析了拉坯速度及浇注倾角等工艺参数对组合结晶器内钢液流场的影响.结果表明:钢液进入组合结晶器后分为三个流股,其中的两个流股对称地沿周向流动的同时向上反卷,在组合结晶器的上部形成两个对称的漩涡;另一个流股沿周向流动的同时向下流动,最终以几乎相等的流速流出结晶器.涡心位置随着拉坯速度的增大而下移,同一拉坯速度下,漩涡涡心在浇注倾角为60°左右时最低.在相同的拉坯速度下,随着浇注倾角的增大,钢液流股的穿透深度也随之增大.浇注倾角为15°时,钢液对辊芯的冲刷速度较大,而浇注倾角为90°时,钢液对辊芯的冲刷速度较小.The fluid flow of molten steel in the continuous casting mould for compound roll has been simulated numerically using the κ-ε double equation model of turbulence to discuss the effects of casting speed and pouring angle on the fluid flow. The results showed that the molten steel enters into the mould assembly in three flows of which the two move upward peripherally at the same time to form symmetrically two eddies at the upper part of the mould, while the other one moves downward peripherally and, eventually, goes out of the mould at the speed about the same. And the eddy center moves downward with increasing casting speed. At the same casting speed, the eddy center is the lowest if the pouring angle is about 60° and the penetrating depth of molten steel flow increases with the increasing pouring angle. The scouring velocity of the molten steel against roll core is the highest and lower when the pouring angle is 15° and 90°, respectively.

关 键 词：复合轧辊 连续铸造 组合结晶器 流场 数值模拟 

分 类 号：TF777.7[冶金工程—钢铁冶金]