连铸二冷气雾冷却过程导热反问题分析  

A Method for Solving the Inverse Heat Conduction Problem During Aerosol Cooling Process

作　　者：赵增武[1] 赵立峰[1] 张亚竹[2] 周立平 张孟昀[1] 胡强[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《钢铁钒钛》2012年第5期41-45,共5页Iron Steel Vanadium Titanium

摘　　要：建立了连铸二冷气雾冷却一维非稳态导热过程中由铸坯内部单个测温点测得的温度值反算表面未知温度和表面热流密度的数学模型,利用热平衡法建立各节点差分方程,引入灵敏度系数,通过牛顿迭代法优化假设初始值。为了验证该数学模型的正确性,在铸坯表面施加已知热流密度,结果表明反算得到的热流密度与已知热流密度吻合较好。分析了连铸二冷过程中铸坯表面热流密度的变化规律。A mathematical model was established in this paper to deduce unknown surface temperature and surface heat flux density in the process of 1-d unsteady state thermal conductivity based on the tem- peratures measured at each internal temperature measuring point in casting strand. Difference equation for each node was established by using heat balance method, and through the introduction of sensitivity coefficient, the initial boundary conditions was optimized through Newton iterative method. In order to verify the correctness of the mathematical model, through exerting face, it was found that the heat flux density obtained through heat flux with given density on the solid surdeduction coincided with the given value. In addition, the changing hale of the heat flux density on the surface of the casting strand in the process of secondary cooling during continuous casting was analyzed.

关 键 词：连铸 二次冷却 导热反问题 气雾射流 

分 类 号：TF777[冶金工程—钢铁冶金] TK124[动力工程及工程热物理—工程热物理]