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首页> 外文期刊>International Journal of Heat and Mass Transfer >Heat transfer predictions with a cubic κ―ε model for axisymmetric turbulent jets impinging onto a flat plate
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Heat transfer predictions with a cubic κ―ε model for axisymmetric turbulent jets impinging onto a flat plate

机译：立方κ―ε模型对轴对称湍流射流撞击平板的传热预测

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摘要

Local heat transfer in turbulent axisymmetric jets, impinging onto a flat plate, is predicted with a cubic κ―ε model. Both the constitutive law for the Reynolds stresses and the transport equation for the dissipation rate ε contribute to improved heat transfer predictions. The stagnation point value and the shape of the profiles of the Nusselt number are well predicted for different distances between the nozzle and the flat plate. Accurate flow field predictions, obtained with the presented turbulence model, are the basis for the quality of the heat transfer results. The influence of the nozzle―plate distance on the stagnation point Nusselt number, is also correctly captured. For a fixed nozzle―plate distance, the influence of the Reynolds number on the stagnation point heat transfer is correctly reproduced. Comparisons are made to experimental data and to results from a low-Reynolds standard κ―ε model and the v~2―f model.
机译：用立方κ模型预测了湍流轴对称射流中撞击到平板上的局部传热。雷诺应力的本构定律和耗散率ε的输运方程都有助于改进传热预测。对于喷嘴和平板之间的不同距离，可以很好地预测停滞点值和Nusselt数轮廓的形状。利用提出的湍流模型获得的精确流场预测是传热结果质量的基础。喷嘴板距对停滞点Nusselt数的影响也可以正确捕获。对于固定的喷嘴-平板距离，可以正确地再现雷诺数对停滞点传热的影响。对实验数据和低雷诺标准κ-ε模型和v〜2-f模型的结果进行了比较。

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