Physical and Mathematical Simulation of Surface‐Free Vortex Formation and Vortex Prevention Design during the End of Casting in Tundish
Physical and Mathematical Simulation of Surface‐Free Vortex Formation and Vortex Prevention Design during the End of Casting in Tundish
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DOI：
10.1002/srin.201900616
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发表时间：
2020-03
影响因子：
2.2
通讯作者：
Yanwei Ruan;Yu Yao;Shiyi Shen;Bo Wang;Jieyu Zhang;Junkai Huang
中科院分区：
文献类型：
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作者：
Yanwei Ruan;Yu Yao;Shiyi Shen;Bo Wang;Jieyu Zhang;Junkai Huang
本文采用数学和物理模拟的方法，对旋流器内旋涡的形成和卷渣进行了研究。本文旨在对连铸结晶器中自由表面涡流的形成机理有所认识。采用重整化群（RNG）k-ε湍流模型建立了一个三维多相数学模型，用于预测双流板坯连铸机1：4水模型的涡流形成和渣层行为。采用欧拉流体体积模型跟踪钢渣-空气自由表面和旋涡，并考虑了科氏力的影响。通过改变导流洞在大坝上的位置，提出了一种改进的防涡设计方案，并与原方案进行了数值模拟和物理模拟比较。涡结构和涡形成的临界高度的预测结果与水模结果吻合较好。结果表明，通过调整导流孔在大坝出口附近的位置，可以显著降低漩涡形成的临界高度。
Herein, the formation of the vortex and slag entrainment in tundish is studied by using mathematical and physical simulation. This article aims at contributing to the understanding of the free surface vortex formation in continuous casting tundish at the end of casting. A 3D multiphase mathematical model using the renormalization group (RNG) k–ε turbulence model is developed to predict the vortex formation and slag layer behavior on the scale of the 1:4 water model of a two‐strand slab tundish. The Eulerian volume of fluid model is adopted to track the steel–slag–air free surface and vortex, and the effect of Coriolis force is considered in this simulation. An improved vortex prevention design is also proposed by changing the position of the diversion hole on the dam of the tundish, which is compared with the original scheme using numerical and physical simulation. The predicted results of the vortex structure and the critical height of the vortex formation agree well with the water modeling results. It is demonstrated that the critical height of the vortex formation is reduced significantly by regulating the position of the diversion hole on the dam near the outlet of the tundish.