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对铝板进行加热试验,得到各测试点的温度数据。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,从而间接求得铝卷接触热阻,并推导出了铝卷强对流传热系数对温度的数学表达式。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,模拟了铝卷退火过程中的瞬态温度场。仿真结果表明,铝卷内部的温度与实测结果比较吻合,从而证明了试验方案和铝卷径向接触热阻求解方法的正确性,同时为铝卷退火工艺的优化提供了理论依据。
Heating the aluminum plate to obtain the temperature data of each test point. By solving the inverse problem of heat conduction, the equivalent thermal conductivity between the aluminum plates is obtained, which is equivalent to the radial thermal conductivity of the aluminum coils. The thermal contact resistance of the aluminum coils is obtained indirectly and the convective heat transfer coefficient Mathematical expressions of temperature. Using ANSYS finite element analysis software, considering the non-linearity of thermal conductivity and convection heat transfer coefficient of aluminum coil with temperature, the transient temperature field in aluminum coil annealing was simulated. The simulation results show that the temperature inside the aluminum coil is in good agreement with the measured results, which proves the correctness of the experimental scheme and the method of solving the radial contact thermal resistance of the aluminum coil. At the same time, it provides a theoretical basis for the optimization of the aluminum coil annealing process.