铝卷径向等效导热系数的仿真  

Simulation of equivalent thermal conductivity coefficient for aluminum coil

作　　者：李建平[1] 刘涛[1] 胡仕成[1] 毛大恒[1] 

机构地区：[1]中南大学现代复杂装备设计与极端制造教育部重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2009年第5期1276-1280,共5页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展规划("973"计划)项目(2007CB613706);国家教育部留学回国人员基金资助项目(76084)

摘　　要：利用铝板退火加热实验采集到的温度,通过热传导反问题的求解,求得铝板间的等效导热系数,将其等效为铝卷径向导热系数,并推导出铝卷强对流传热系数对温度的数学表达式,从而构建更准确的铝卷退火的温度场模型。运用ANSYS有限元分析软件,综合考虑铝卷的导热系数和对流换热系数随温度变化的非线性,模拟铝卷退火过程中的瞬态温度场。仿真结果表明:在退火的开始阶段,铝卷外表面与芯部温差较大,最高达173℃;在保温阶段,铝卷内部温差逐渐减小,温差只有3℃,最后稳定在545℃,与实测结果较吻合,证明所建立的数学模型是可靠的,同时,为铝卷退火工艺的优化提供了理论依据。Using temperature data in aluminum plates annealing experiment,the equivalent thermal conductivity coefficient between the aluminum sheets was resolved,and its value was regarded as the radial thermal conductivity coefficient of the aluminum coil.The expression of the convective coefficient to the temperature was derived,and thus a more precise model for the aluminum coil＇s annealing temperature field was established.Considering the non-linearity of the radial thermal conductivity coefficient and the convective coefficient,the temperature field of the aluminum was simulated using the finite element analysis software of ANSYS.The results show that at the beginning of the annealing process,the temperature difference between the outer surface and the core is great,and the greatest value is 173℃.During the holding period,the temperature difference in the aluminum coil decreases to 3℃,and the temperature in the aluminum coil is stable at 545℃.The simulation temperature and the practicing measurement from aluminum annealing curve at the test point are consistent,which proves that the experiment project and the solution method are reasonable.Moreover it provides theory basis for making the annealing process.

关 键 词：导热系数 热传导反问题 黄金分割法 温度场 

分 类 号：TF341.6[冶金工程—冶金机械及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]