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首页> 外文期刊>ISIJ international >Transient Thermo-fluid and Solidification Behaviors in Continuous Casting Mold: Oscillation Behaviors
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Transient Thermo-fluid and Solidification Behaviors in Continuous Casting Mold: Oscillation Behaviors

机译：连铸结晶器中的瞬态热流体和凝固行为：振荡行为

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摘要

A computational model of the continuous casting process has been developed, which includes transient heat transfer, multiphase flow, solidification, and mold oscillation. Succeeding the previous report on the evolution phenomena in the mold, this article describes fluctuations in the pressure, heat flux, and slag films during the oscillation cycle and the coupling effect of these variables on slag flow and shell growth. The results show that the predicted flux pressure is decided by the combined effect of mold velocity and liquid film thickness. The presence of slag rim enhances the nonuniform pressure flow near the meniscus during mold oscillation. Increases in pressure and heat flux occur in the negative strip time while the mold and slag rim move downwards approaching the lowest position, which squeezes the slag flow to be divided into two tributaries, promoting the slag infiltration and the initial shell solidification. Negative consumption rate is identified partly in the cycle based on the velocity distributions of liquid slag. The model provides quantitative analysis regarding the influence of meniscus shape and slag films related to the casting speed on slag consumption and oscillation mark formation.
机译：已开发出一种连续铸造过程的计算模型，其中包括瞬态传热，多相流，凝固和结晶器振动。继先前关于结晶器中的演变现象的报告之后，本文描述了在振荡周期中压力，热通量和矿渣膜的波动，以及这些变量对矿渣流和壳生长的耦合效应。结果表明，预测的通量压力取决于模具速度和液膜厚度的综合影响。炉渣边缘的存在增强了模具振荡过程中弯液面附近压力的不均匀流动。负压带时间内压力和热通量增加，而铸模和炉渣边缘向下移动到最低位置，这将炉渣流量压缩成两个支流，促进了炉渣的渗透和初始壳体的凝固。负消耗率部分根据液体炉渣的速度分布在循环中确定。该模型提供了有关弯月形状和渣膜与浇铸速度有关的影响的定量分析，这些影响对铸渣消耗和振动痕迹的形成具有影响。

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