Application of a New Swirling Flow Generator in the Casting Process
In order to obtain a better and more beneficial flow pattern,a swirling flow has widely been studied and applied in the casting process of steel.A new swirling flow generator,namely the TurboSwirl device,was comprehensively investigated based on numerical simulations and water model experiments.The results show that the flow pattern could be significantly affected by an optimized design of the TurboSwirl device,when it was applied to the uphill ingot casting process.Also,a water model experiment was carried out to validate the numerical optimized results with the help of ultrasonic velocity measurements.Furthermore,the reverse TurboSwirl device was applied to the design of a submerged entry nozzle in the continuous casting process.The numerical results from the SEN agreed well with the experimental results of the axial and tangential velocities.Based on this concept,a divergent nozzle was connected to the reverse TurboSwirl to improve the flow pattern.A strong swirl intensity could be obtained at the outlet of the submerged entry nozzle by applying this new design in the billet continuous casting process.In addition,different turbulence models were used in the mathematical modelling to study the strong swirling flow generated by the TurboSwirl device.The results show that the Reynold stress model(RSM)can more successfully simulate the air-core vortex that appeared in the experiment compared to the prediction using the k-ε based turbulence models.However,the transient and periodic behavior of the swirling flow is predicted more accurately by the detached eddy simulation(DES)turbulence model in comparison to the measured results.The results of this study show that the TurboSwirl device can be used for the design and improvement of a swirling flow in casting processes.
swirling flow casting TurboSwirl flow pattern
BAI Haitong ERSSON Mikael J(O)NSSON P(a)r
Division of Processes,Department of Materials Science and Engineering,KTH Royal Institute of Technology,SE-10044,Stockholm,Sweden
国际会议
STEELSIM2017(第七届冶金过程及钢铁材料模拟及仿真国际会议)
青岛
英文
256-260
2017-08-16（万方平台首次上网日期，不代表论文的发表时间）