Numerical Investigation of the Hydrodynamic Conditions in A Multi-Strand Cc Tundish with Closed Outlets
Numerical Investigation of the Hydrodynamic Conditions in A Multi-Strand Cc Tundish with Closed Outlets
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DOI：
10.2478/amm-2014-0150
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发表时间：
2014-10
影响因子：
0.6
通讯作者：
T. Merder
中科院分区：
文献类型：
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作者：
T. Merder
在工业条件下，存在CC机器在紧急情况下工作的情况。这可能是由于机械或电气原因，钢坯的漏钢或供应新的钢水部分到连铸机的问题。因此，应关闭排气管的一个或两个出口。然而，关闭其中一个出口会影响发生在通风系统中的流体动力学和热条件。因此，重要的信息是应该关闭哪个出口以正确地进行进一步的连续铸造过程。本文研究了多流连铸机所有出口不工作时对钢液流动行为的影响。采用基于Navier-Stokes方程（k-ε标准湍流模型）的数值方法求解该问题。使用CFD程序（计算流体动力学）的教育版- ANSYSFluent进行数值模拟。得到了预测的速度场和停留时间分布曲线。RTD特性被用来确定钢液混合的动力学，并计算部分特定的流动面积的研究情况。
In industrial conditions there are situations when the CC machine works under emergency. It can be result of mechanical or electrical causes, breakout of billet or problem with supplying new parts of liquid steel to the CC machine. As a consequence one or two outlets of the tundish should be closed. However, closing one of the outlets influences the hydrodynamic and thermal conditions occurring in the tundish. Thus, the important information is which of the outlets should be closed to conduct further continuous casting process correctly. The following research was conducted to analyze the influence of liquid steel flow behaviour in the multi-strand tundish when all outlets do not work. Such problem was solved by means of numerical methods based on Navier-Stokes equations (k-ε standard turbulence model). Numerical simulations were done using the educational version of CFD program (Computational Fluid Dynamics) – ANSYSFluent. As a result forecasted velocity fields and RTD curves (Residence Time Distribution) were obtained. RTD characteristics were used to determine kinetics of liquid steel mixing and also to calculate parts of particular flow areas for studied cases.