摘要
以某钢厂宽板坯连铸结晶器为研究对象,通过FLUENT商业软件模拟结晶器内温度和速度场分布,证明原有水口存在上循环弱,热交换慢,保护渣熔化不均匀等缺点是铸坯出现表面纵裂纹的主要原因。针对原水口的缺点,设计出满足现场生产工艺条件的水口形状为扁形、侧孔倾角-15°、底部形状为凸底的新结晶器浸入式水口,并运用数值模拟手段对新水口形成的钢液流动形式进行了分析。结果表明,新水口各项参数均明显优于原有水口,现场实验证明新水口使用效果良好。
Fluid flow and temperature distribution in a wide slab continuous caster mold are simulated using the commercial software FLUENT. The research results show that the longitudinal cracks in the wide slab surface with an original submerged entry nozzle （SEN） mainly are caused by weak upper flow circulation in the mold, slow heat exchange near the meniscus, and non-uniform melting of the mold powder. Therefore, a modified SEN with smaller outlet thickness, a 15° downward port angle, and convex bottom is designed to overcome the disadvantages of the original nozzle. The characteristics of the molten steel flow are analyzed by numerical simulation. The results indicate that the parameters of the optimum SEN are more highly optimized than the original SEN. The trial results also show that the optimum SEN possesses a better application effect.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期173-176,196,共5页
Journal of Chongqing University
基金
重庆市自然科学基金资助项目(2006BB402)
关键词
板坯结晶器
数值模拟
浸入式水口
流场
温度场
slab mold
numerical simulation
submerged entry nozzle （SEN）
fluid flow
temperature distribution
