Study of Transient Flow Structures in the Continuous Casting of Steel

钢连铸过程中瞬态流动组织的研究

• 批准号: 9800274
• 负责人: Brian Thomas
• 金额: $ 34万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2001-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800274&HistoricalAwards=false
• 关键词: Study; Transient; Flow; Structures; Continuous

DMI -9800274 Thomas This work is to develop mathematical models of transient fluid flow in the continuous casting of steel slabs, validate them with measurements, and apply them to provide a detailed understanding of how defects form, so that the process can be improved. Continuous casting accounts for 89 percent of the 100 million tons of steel produced each year in the United States. Continued viability of the high-volume-low-profit-margin steel industry depends on improving the quality of the steel product while also increasing efficiency. Plant observations have found that many serious quality problems are directly associated with the flow pattern in the mold region. This flow is highly turbulent, and is characterized by large scale unsteady recirculation. A better understanding of the flow physics would enable improvements to process modeling and future optimization. With many different operations to optimize, the industry can no longer afford the traditional trial-and-error approach. This project will advance the state-of-the-art of Large-Eddy-Simulation flow modeling, which has not previously addressed a process of this complexity. The models will be calibrated and validated through experimental measurements obtained in both the research labs and plants of a consortium of steel companies, who are cosponsoring this work. Then, based on the improved fundamental understanding gained from model application, improved nozzle designs and operating conditions that minimize defects will be found. In the future, as thin slab and strip casting processes continue to be developed, the computational tools developed in this work can be applied to these new processes as well.

托马斯 这项工作是开发的瞬态流体流动的数学模型在连铸的钢板，验证它们与测量，并应用它们提供一个详细的了解如何形成缺陷，使该过程可以得到改善。 在美国每年生产的1亿吨钢中，连铸占89%。高产量、低利润的钢铁行业能否继续生存，取决于在提高效率的同时提高钢铁产品的质量。工厂观察发现，许多严重的质量问题与模具区域的流动模式直接相关。这种流动是高度湍流的，并且以大尺度非定常再循环为特征。更好地理解流动物理学将有助于改进过程建模和未来的优化。由于有许多不同的操作需要优化，该行业再也负担不起传统的试错方法。 该项目将推进大涡模拟流动建模的最新技术，这在以前还没有解决过这种复杂性的过程。 这些模型将通过共同赞助这项工作的钢铁公司联盟的研究实验室和工厂获得的实验测量值进行校准和验证。然后，基于改进的基本理解从模型应用中获得，改进的水口设计和操作条件，最大限度地减少缺陷。在未来，随着薄板坯和薄带连铸工艺的不断发展，在这项工作中开发的计算工具可以应用到这些新的过程，以及。