基于CFD建立了连铸过程中钢液流动、凝固及夹杂物运动三维数学模型。考虑铸坯弧形和水口形状，研究了连铸板坯凝固坯壳对钢液流动和夹杂物运动的影响，得出了夹杂物的上浮率及在凝固铸坯上的分布。研究结果表明，铸坯凝固对钢液流场有显著影响。凝固坯壳阻碍钢液向下流动，考虑凝固的钢液回流区更靠近弯月面，钢液流出回流区更趋于向铸坯中心运动；凝固的夹杂物上浮率相对于不考虑凝固的夹杂物上浮率高。
Abstract:A 3-D mathematical model for fluid flow, solidification and inclusions movement in continuous casting is built based on CFD. Influence of solid shell on fluid flow and inclusions movement is studied by considering the SEN configuration and the slab curvature. The inclusions floating rate and distribution in slab are obtained. The results indicate that the solidification is an important factor for the fluid flow. The length of re-circulation region in the strand with solidification is shorter than that without solidification, because the solidified shell would hinder downward flow of fluid. The fluid moves toward the slab center along the solid shell after it flows out of the lower re-circulation region. The inclusions floating rate with solidification is higher than that without solidification.
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