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首页> 外文期刊>Journal of Heat Transfer >Heat Transfer Coefficients in Concentric Annuli
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Heat Transfer Coefficients in Concentric Annuli

机译：同心圆环的传热系数

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摘要

The geometric shape of a passage's cross-section has an effect on its convective heat transfer capabilities. For concentric annuli, the diameter ratio of the, annular space plays an important role. The purpose of this investigation was to find a correlation that will accurately predict heat transfer coefficients at the inner wall of smooth concentric annuli for turbulent flow of water. Experiments were conducted with a wide range of annular diameter ratios and the Wilson plot method was used to develop a convective heat transfer correlation. The deduced correlation predicted Nusselt numbers accurately within 3 percent of measured values for annular diameter ratios between 1.7 and 3.2 and a Reynolds number range, based on the hydraulic diameter, of 4 000 to 30,000.
机译：通道横截面的几何形状会影响其对流传热能力。对于同心环，环形空间的直径比起重要作用。这项研究的目的是找到一种相关性，该相关性将精确地预测光滑的同心环面内壁上湍流的水的传热系数。在宽的环形直径比范围内进行了实验，并使用Wilson绘图法建立了对流传热的相关性。对于1.7和3.2之间的环形直径比率以及基于水力直径的雷诺数范围为4 000至30,000，推导的相关性预测Nusselt数精确地在测量值的3％之内。

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