Predictions of turbulent heat transfer in an axisymmetric jet impinging on a heated pedestal
Predictions of turbulent heat transfer in an axisymmetric jet impinging on a heated pedestal
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轴对称射流撞击加热基座时的湍流传热预测
DOI：
10.1115/1.2825964
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发表时间：
1999
影响因子：
--
通讯作者：
P. Durbin
中科院分区：
文献类型：
--
作者：
S. Parneix;M. Behnia;P. Durbin
冲击射流对平板的冷却或加热，由于其广泛的应用，得到了广泛的研究。最近关于更复杂几何形状的实验数据已经可以获得。在这项研究中，对安装在平板上的加热基座的冷却进行了数值模拟，这种结构更接近于一些工程应用中遇到的结构(例如，电子元件的冷却)。采用轴对称几何中的法向速度松弛湍流模型(V2F模型)。得到了一定范围内的射流雷诺数和射流到底座距离的结果。将预测的换热系数与实验值进行了比较，两者吻合得很好。作为比较，用广泛使用的κ-e湍流模型也得到了结果，但与数据的一致性较差。
Cooling or heating of a flat plate by an impinging jet, due to its many applications, has been widely studied. Recent experimental data concerning more complex geometries has become available. In this study, the cooling of a heated pedestal mounted on a flat plate, a configuration which is closer to the one met in some engineering applications (e.g., cooling of electronic components), has been numerically simulated. The normal velocity relaxation turbulence model (V2F model) in an axisymmetric geometry has been adopted. Results have been obtained for a range of jet Reynolds numbers and jet-to-pedestal distances. Comparison of the predicted heat transfer coefficient with experiments has shown a very good agreement. For comparison, results have also been obtained with the widely used κ – e turbulence model and the agreement with the data is poor.