论文部分内容阅读
结晶器渣-钢界面的控制是板坯连铸操作中的重要环节。为研究渣-钢界面的流体动力学行为,建立了“空气-保护渣-钢液”三相流模型,运用雷诺应力模型和非均相混合模型对结晶器三相流场进行模拟研究,采用等体积分数法确定渣-钢界面的形状及位置。浸入式水口对中不良时会导致结晶器内产生非对称流场,研究发现该流场的渣-钢界面波动比相同操作参数下对称流场的界面波动要剧烈得多,且非对称流场的渣-钢界面会有偏流甚至旋涡出现,对结晶器操作危害很大。
Mold slag - steel interface control is an important part of slab continuous casting operation. In order to study the fluid dynamics of slag-steel interface, a three-phase flow model of “air-mold flux-molten steel” was established. The three-phase flow field of the mold was simulated using the Reynolds stress model and heterogeneous mixing model , Using the same volume fraction method to determine the shape and location of the slag-steel interface. Imperfections in the submerged nozzle lead to asymmetric flow field in the mold. It is found that the interface between the slag and the steel fluctuates more violently than the symmetrical flow field under the same operating parameters, and the asymmetric flow field The slag - steel interface there will be bias or vortex appears, a great harm to the operation of the mold.