开浇过程湍流抑制器消能行为的数值模拟
Numerical simulation on energy dissipation behavior of turbulence inhibitors during opening stage
林鹏 1金焱 1甘菲芳 2马国军 1刘子钰 1程常桂1
作者信息
- 1. 武汉科技大学耐火材料与冶金国家重点实验室,湖北武汉 430081
- 2. 宝山钢铁股份有限公司,上海 201900
- 折叠
摘要
中间包开浇过程中钢液流速大,极易造成钢液飞溅.有关开浇过程钢液流场的研究较少,缺乏相关机理性研究.根据钢液流动特性,引入水力学消能的概念,对中间包开浇过程中钢液流场变化以及内旋型湍流抑制器对开浇钢液的消能效果进行研究,并对不同结构湍流抑制器的消能效果及影响因素进行分析,得出开浇过程中钢液流场变化情况和内旋型湍流抑制器消能效果的作用机理.方形湍流抑制器通过挑流消能方式消能;波浪形湍流抑制器主要通过底流消能,次级消能方式为挑流消能;月牙形湍流抑制器通过形成表面旋流的面流、窄缝式消能等消能方式对钢液进行消能;内旋型湍流抑制器通过面流、窄缝式消能、旋滚流消能和孔流消能等结合的方式对钢液进行消能.内旋型湍流抑制器多种消能机理相结合的方式,对钢液的消能效果最明显.研究结果表明,内旋型湍流抑制器的综合消能表现最佳,可以有效降低开浇过程中钢液飞溅的高度,降低卷入的空气量.研究结果为湍流抑制器优化设计提供了理论基础及参考数据,可以有效提高湍流抑制器的利用率,降低生产成本,有较好的应用前景.
Abstract
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.
关键词
开浇/湍流抑制器/消能率/中间包/数值模拟Key words
opening stage/turbulence inhibitor/energy dissipation rate/tundish/numerical simulation引用本文复制引用
基金项目
国家自然科学基金资助项目(52174324)
出版年
2024
NETL
NSTL
万方数据