铸造技术2018，Vol.39Issue(2)：276-280,5.DOI:10.16410/j.issn1000-8365.2018.02.004
基于多场耦合模型的连铸结晶器内钢液凝固行为分析
Analysis of Molten Steel Solidification in Continuous Casting Mold Based on Coupling Model
摘要
Abstract
A three-dimensional unsteady mathematical model of molten steel flow,heat transfer and solidification in slab continuous casting mold was developed on the basis of continuum mechanics and energy conservation theory.Using the coupling model,calculation and analysis were made with COMSOL software.The computed solidified shell thickness basically tallied with the empirical data.The results show that the basic characteristics of the molten steel flow in the mold does not change compared to the single-flow model.However,the distances of the vortex center of upper and lower recirculation regions to free surface decrease,and the steel penetrate depth decreases too.The molten steel flow phenomenon does not appear in some regions near the narrow side of the mold due to the formation of solidified shell.The steel velocity and turbulent kinetic energy on free surface increase because of the effects of solidified shell.The forced convection heat transfer causes molten steel temperature fluctuations within a narrow range,so the temperature does not gradually reduce from inside to outside in the mold.The molten steel temperature at the mold outlet is lower,the distribution is uneven,and the temperature gradient is larger in certain areas.As the molten steel convection promotes the heat transfer,solidified shell thickness at narrow side,wide side and corner is thicker.关键词
连铸/结晶器/凝固/耦合模型Key words
continuous casting/mold/solidification/coupling model分类
矿业与冶金引用本文复制引用
孙瑞,熊玮,王杰,田儒来..基于多场耦合模型的连铸结晶器内钢液凝固行为分析[J].铸造技术,2018,39(2):276-280,5.基金项目
国家自然科学基金(51572203) （51572203）
