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针对板坯连铸过程,建立了钢液流动、传热、凝固的三维耦合数值计算程序,计算、分析了该过程钢液的流动、凝固特征,以及在浸入式水口区域和结晶器边部等局部区域钢液的流动、温度分布特点.计算结果表明,从浸入式水口出口注入的钢液,在流动的区域内形成2个空间分布的大循环区域,这两个循环区域中心的温度相对较低.上循环流在结晶器窄边附件由于拉坯的作用形成了小的狭长循环,同时有倒钩状温度分布情况.结晶器表面钢液的流动速度、湍动能分布大小以及F数,在一定程度上可以表征结晶器液面波高以及与铸坯质量的关系.
Aiming at the process of slab casting, a three-dimensional coupled numerical calculation program was established for the flow, heat transfer and solidification of molten steel. The flow and solidification characteristics of molten steel in the process were calculated and analyzed. The results show that the molten steel injected from the outlet of the submerged entry nozzle forms two large circulation areas in the flow area, and the temperature in the center of the two circulation areas is relatively Low.The circulation on the narrow side of the mold attachment due to the role of casting formed a small long and narrow cycle, while the barb-shaped temperature distribution.Material flow velocity on the mold surface, the distribution of turbulent kinetic energy and F number, in the To some extent, it can characterize the wave height of the mold surface and the relationship with the slab quality.