Numerical simulation on energy dissipation behavior of turbulence inhibitors during opening stage
In a tundish,the velocity of the molten flow will be large during the opening stage,and can easily cause splashing of molten steel.There is relatively little research on the flow field of molten steel during the opening stage,and there is a lack of the mechanistic research on the flow field during the opening stage.Based on the flow characteristics of molten steel,the concept of hydraulic energy dissipation was introduced to study the changes in flow field of molten steel during the opening stage of the tundish and the energy dissipation effect of internal rotation turbulence inhibitors on the opening stage of molten steel.The energy dissipation effect and influencing factors of turbulence inhibitors with different structures were studied,and the changes in the flow field of molten steel during the opening stage and the mechanism of energy dissipation effect of internal rotation turbulence inhibitors were ob-tained.The square turbulence inhibitor dissipated energy through a jet flow energy dissipation method.The wave shaped turbulence inhibitor mainly dissipated energy through bottom flow,and the secondary energy dissipation method was jet flow energy dissipation.The crescent shaped turbulence inhibitor dissipated energy in molten steel through surface swirling flow,narrow slit energy dissipation,and other energy dissipation methods.The internal rotation turbulence inhibitor combined surface flow,narrow slit energy dissipation,rotary flow energy dissipation,and hole flow energy dissipation to dissipate energy in the molten steel.The internal rotation turbulence inhibitor had the most significant energy dissipation effect on molten steel through a combination of multiple energy dissipa-tion mechanisms.The research results indicate that the internal rotation turbulence inhibitor has the best compre-hensive energy dissipation performance,which can effectively reduce the height of steel splashing during the opening stage,reduce the amount of air entrained.The results provide a theoretical basis and reference data for the optimiza-tion design of turbulence inhibitors,which can effectively improve the utilization rate of turbulence inhibitors and re-duce production costs,and have good application prospects.
NETL
NSTL
万方数据
