Prediction of Jet Impingement Heat Transfer Using a Hybrid Wall Treatment With Different Turbulent Prandtl Number Functions
Prediction of Jet Impingement Heat Transfer Using a Hybrid Wall Treatment With Different Turbulent Prandtl Number Functions
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使用具有不同湍流普朗特数函数的混合壁处理来预测射流冲击传热
DOI：
10.1115/1.2822668
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发表时间：
1996
影响因子：
--
通讯作者：
R. Amano
中科院分区：
文献类型：
--
作者：
G. K. Morris;S. Garimella;R. Amano
本文通过数值计算，研究了方形热源在轴对称受限浸没液体射流垂直冲击下的局部换热系数分布。数值预测的喷嘴直径为3.18和6.35毫米，在几个喷嘴热源间距，湍流射流雷诺数范围从8500到13000。采用商业有限体积程序FLUENT，采用标准的高雷诺数k-e湍流模型求解热场和流场。从代码中获得的收敛的解决方案进行了改进，使用后处理程序，包括几个近壁模型。四个替代的湍流普朗特数函数的预测传热系数的作用进行了研究。预测的传热系数进行了比较与以前获得的实验测量。预测的滞止和平均传热系数与实验一致，最大偏差分别为16%和20%。讨论了预测和实测传热系数之间差异的原因。
The local heat transfer coefficient distribution on a square heat source due to a normally impinging, axisymmetric, confined, and submerged liquid jet was computationally investigated. Numerical predictions were made for nozzle diameters of 3.18 and 6.35 mm at several nozzle-to-heat source spacings, with turbulent jet Reynolds numbers ranging from 8500 to 13,000. The commercial finite-volume code FLUENT was used to solve the thermal and flow fields using the standard high-Reynolds number k-e turbulence model. The converged solution obtained from the code was refined using a post-processing program that incorporated several near-wall models. The role of four alternative turbulent Prandtl number functions on the predicted heat transfer coefficients was investigated. The predicted heat transfer coefficients were compared with previously obtained experimental measurements. The predicted stagnation and average heat transfer coefficients agree with experiments to within a maximum deviation of 16 and 20 percent, respectively. Reasons for the differences between the predicted and measured heat transfer coefficients are discussed.