铸造成形过程用界面换热系数求解的轴对称件反传热模型

Inverse Heat Transfer Model of Axisymmetric Parts for Solving Interfacial Heat Transfer Coefficient in Casting Process

准确设置边界条件是保证数值模拟精度的前提。本文针对凝固过程中的轴对称铸件建立相应的反传热模型求解其界面换热系数,对Pro CAST仿真的温度值与正传热算法计算结果进行了比较,证实了正传热算法的计算精度,进而对比假设的实际热流与反算的热流值,验证了建立的轴对称反传热模型计算界面换热系数和界面热流的有效性及准确性。

Accurate setting of boundary conditions is precondition of ensuring the accuracy of numerical simulation. For the axisymmetric casting during solidification, an inverse heat transfer model was established to solve the interfacial heat transfer coefficient. The temperature values by Pro CAST simulation were compared with the computing results of the positive heat transfer algorithm. The accuracy of the positive heat transfer algorithm was confirmed. Then, by comparing the hypothetical actual heat flux with the back calculated heat flux, the effectiveness and accuracy of the established axisymmetric inverse heat transfer model for calculating the interfacial heat transfer coefficient and the interfacial heat flux were verified.