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首页> 外文期刊>Journal of Heat Transfer >Comparison of Various RANS Models for Impinging Round Jet Cooling From a Cylinder
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Comparison of Various RANS Models for Impinging Round Jet Cooling From a Cylinder

机译：从气缸撞击圆射流冷却的各种RANS模型的比较

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摘要

The numerical analysis for the round jet impingement over a circular cylinder has been carried out. The v(2)f turbulence model is used for the numerical analysis and compared with the two equation turbulence models from the fluid flow and the heat transfer point of view. Further, the numerical results for the heat transfer with original and modified v(2)f turbulence model are compared with the experimental results. The nozzle is placed orthogonally to the target surface (heated cylindrical surface). The flow is assumed as the steady, incompressible, three-dimensional and turbulent. The spacing between the nozzle exit and the target surface ranges from 4 to 15 times the nozzle diameter. The Reynolds number based on the nozzle diameter ranges from 23,000 to 38,800. From the heat transfer results, the modified v(2)f turbulence model is better as compared to the other turbulence models. The modified v(2)f turbulence model has the least error for the numerical Nusselt number at the stagnation point and wall jet region.
机译：进行了圆形射流撞击圆柱体的数值分析。将v（2）f湍流模型用于数值分析，并从流体流动和传热的角度将其与两个方程式湍流模型进行比较。此外，将原始和改进的v（2）f湍流模型的传热数值结果与实验结果进行了比较。喷嘴垂直于目标表面（加热的圆柱表面）放置。假定流动为稳定，不可压缩，三维和湍流。喷嘴出口和目标表面之间的间距是喷嘴直径的4到15倍。基于喷嘴直径的雷诺数范围为23,000至38,800。从传热结果来看，与其他湍流模型相比，改进的v（2）f湍流模型更好。改进的v（2）f湍流模型在滞流点和壁射流区域的数值Nusselt数具有最小的误差。

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