Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel
Abstract
:1. Introduction
2. Physical Simulation Research
2.1. Experimental Device and Principle
2.2. Structure of Traditional and New-Type Submerged Entry Nozzle for Continuous Casting
2.3. Experimental Results and Discussion
3. Numerical Simulation Research
3.1. General Assumptions of the Numerical Model
3.2. Governing Equations
3.3. Boundary Conditions and Computation Initialization
3.4. Numerical Simulation Results and Analysis
3.4.1. Influence of Nozzle Type on Flow Field
3.4.2. Effect of Nozzle Type on the Nozzle Outlet Jet
4. Conclusions
- (1)
- Compared with the traditional nozzle, the new-type nozzle with internal hemispherical crowns has a shallower molten steel jet impact depth, the impact depth is between 26.5 and 33.61 cm, and the impact angle is between 23 and 29 degrees, and the position of the circuiting zone is closer to the molten steel free surface, which is more conducive to the floating of inclusions. The probability of occurrence of entrapment of top slag is small.
- (2)
- The longitudinal velocity distribution inside the traditional nozzle is uniform. Inside the new-type nozzle, however, transverse velocity components are generated due to the existence of the hemispherical crowns, forming swirl jets at the nozzle outlets with reduced velocity. Therefore, different from the traditional nozzle, the outlet flow from the new-type nozzle is a rotating jet with weaker impact, which is beneficial for using higher casting speed.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Fluid Media | Density (kg/m3) | Dynamic Viscosity (kg/(m·s)) | Kinematic Viscosity (m2/s) |
---|---|---|---|
Molten steel | 7020 | 6.2 × 10−3 | 0.95 × 10−6 |
Water | 1000 | 1 × 10−3 | 1 × 10−6 |
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Cai, C.; Zhao, M.; Shen, M.; Pan, Y.; Deng, X.; Shi, C. Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel. Processes 2023, 11, 3237. https://doi.org/10.3390/pr11113237
Cai C, Zhao M, Shen M, Pan Y, Deng X, Shi C. Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel. Processes. 2023; 11(11):3237. https://doi.org/10.3390/pr11113237
Chicago/Turabian StyleCai, Changyou, Ming Zhao, Minggang Shen, Yuhua Pan, Xin Deng, and Chunyang Shi. 2023. "Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel" Processes 11, no. 11: 3237. https://doi.org/10.3390/pr11113237
APA StyleCai, C., Zhao, M., Shen, M., Pan, Y., Deng, X., & Shi, C. (2023). Physical and Numerical Simulation Study on Structure Optimization of the Inner Wall of Submerged Entry Nozzle for Continuous Casting of Molten Steel. Processes, 11(11), 3237. https://doi.org/10.3390/pr11113237