Abstract

In this present work, round jet impingement on a heated flat plate at constant heat flux is analysed experimentally and numerically. Experiments have been performed at various Reynolds numbers (Re_d = 10,000 to 25,000) and at four different nozzles to plate spacing (h/d = 4, 6, 8 and 10). Different RANS turbulence model namely, k-ω SST, Realizable k-ε, RNG k-ε and ν²f were used to validate the numerical results with experimental results. The results of various turbulence models were analysed for varying inlet turbulent intensities and eddy viscosity ratios. It has been observed that the inlet turbulent intensity and eddy viscosity ratio are significant for the accurate prediction of realistic results.

中文翻译：

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平板射流冲击传热特性的实验与数值研究

摘要

在本工作中，以恒定的热通量对圆形平板撞击加热平板进行了实验和数值分析。实验已经在各种雷诺数（Re _d  = 10,000至25,000）和四个不同的喷嘴到板间距（h / d = 4、6、8和10）下进行了。不同RAN湍流模型即，K-ωSST，可实现的k-ε，RNG的k-ε和ν ² ˚F被用来验证与实验结果的数值结果。针对各种入口湍流强度和涡流粘度比，分析了各种湍流模型的结果。已经观察到，入口湍流强度和涡流粘度比对于准确预测实际结果很重要。