Simulation of the Fluid Flow and Heat Transfer for the Submerged Entry Nozzle and the Mold in the Continuous Casting of Slabs and Blooms

Autor: Li, Wang-Da, 李汪達
Rok vydání: 2001
Druh dokumentu: 學位論文 ; thesis
Popis: 89
A mathematical model was employed to calculate the fluid flow and temperature distribution within the molten steel region of continuous slab and bloom casters. Numerical calculations were based on the real geometry of the China Steel Corporation. The fluid flow and heat transfer phenomena are investigated in this study. The FIDAP code was applied to calculate the three-dimension highly turbulent fluid flow and heat transfer using the K- model and the finite element method. Various kinds of submerged entry nozzles (SEN) for slab and bloom casters are studied in this research. The influence of different operating conditions on fluid flow and heat transfer are also investigated. According to the calculated results, it is concluded that: (1) The symmetry of flow pattern for the SEN with uniform cross sectional area can be raised up to 43% by either decreasing open ratio of the slide gate, reducing the port height or enlarging the nozzle diameter. (2) The symmetry of flow pattern for the SEN with converging and diverging parts of its SEN pipe, port symmetry can be increased up to 25% by decreasing the slide gate opening ratio or the nozzle diameter. (3) The swirling velocity component on the bottom of the bloom caster can be reduced, owing to the additional two ports of the SEN. (4) The meniscus temperature increases about 2.3℃ as the part angle increases from —15 to —10 deg. (5) Meniscus temperature is significantly affected by various positions or port angles of the SEN. This study investigates various effects of the SEN geometry on the fluid flow and heat transfer in the continuous casting process. New simulation results are presented which are crucial to the improved design of the process.
Databáze: Networked Digital Library of Theses & Dissertations
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