基于实测温度的结晶器瞬态传热反问题计算方法  

Inverse Calculation of Transient Heat Transfer for Crystallizer Based on Measuring Temperature

作　　者：王旭东[1] 臧欣阳[1] 杜凤鸣[1] 孔令伟[1] 姚曼[1] 

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《铸造技术》2014年第7期1474-1479,共6页Foundry Technology

基　　金：国家自然科学基金资助项目(51004012);国家高技术研究发展计划(863)资助项目(2009AA04Z134);中国博士后科学基金资助项目(2012M520621/2013T60511)

摘　　要：基于结晶器监控系统实测瞬态温度,建立结晶器传热与铸坯凝固反问题计算模型,利用实测温度反算结晶器/铸坯热流密度,并在此基础上模拟分析结晶器温度分布及铸坯凝固进程。经大量实测瞬态数据的检验,证实了模型与计算方法的合理性。铸造过程中,结晶器/铸坯间的热流、温度与坯壳厚度分布均呈现出显著的非均匀性特点,在铸造方向上具有继承倾向。反问题模型能够反映结晶器内部传热的非均匀特征,及时体现工艺变化过程中传热/凝固的瞬态波动,为其应用于过程监控和工艺优化提供理论及模型基础。An inverse problem calculation model for crystallizer heat transfer and casting blank solidification was established based on actual measuring transient temperature, the heat flux of crystallizer/casting blank was inverse calculated using actual measured temperature, the temperature distribution of crystallizer and solidification progress of casting blank were simulated and analyzed. The rationality of the mathematical model and calculation method were verified by plenty of actual measured transient data. The non-uniform distributions of temperature, heat flux and shell thickness in practice were reflected, which showed inherited tendency along the casting direction. The inverse problem model could reflect the non-uniform of heat transfer and detect the transient fluctuation behavior in the mould.

关 键 词：结晶器传热 反问题 在线监测 板坯连铸 

分 类 号：TF777.1[冶金工程—钢铁冶金]