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首页> 外文期刊>Energies >CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers
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CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

机译：低雷诺数多翅片式翅片换热器空气侧热工水力性能的CFD分析

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摘要

The air-side thermal-hydraulic performance of multi-louvered aluminium fin heat exchangers is investigated. A systematic numerical study has been performed to analyze the air-sde thermal hydraulic characteristics over a wide range of Reynolds number i.e., from 30 to 500. Air-side heat transfer coefficient and pressure drop were calculated and validated over the mentioned band of Reynolds numbers. The critical Reynolds number was determined numerically; and also the variation of flow pattern along with the air-side heat transfer coefficient and pressure drop in a multi-louvered heat exchanger associated with R e c r i has been reported. Moreover, a parametric study of the multi-louvered aluminium fin heat exchangers was also performed for 36 heat exchanger configurations with the louver angles (19–31°); fin pitches (1.0, 1.2, 1.4 mm) and flow depths (16, 20, 24 mm); and the geometric configuration exhibiting the highest air-side heat transfer coefficient was reported. The air-side heat transfer coefficient and pressure drop results for different geometrical configurations were presented in terms of Colburn j factor and Fanning friction factor f ; as a function of Reynolds number based on louver pitch.
机译：研究了百叶窗式铝翅片换热器的空气侧热工水力性能。已经进行了系统的数值研究，以分析在广泛的雷诺数范围（即30至500）内的空气动力热力学特性。在上述雷诺数带上计算并验证了空气侧传热系数和压降。临界雷诺数是通过数值确定的。并且还报告了与R e c r i相关的多百叶窗式换热器中流型的变化以及空气侧传热系数和压降的变化。此外，对百叶窗式铝翅片换热器的参数研究也针对百叶窗角为（19-31°）的36种热交换器配置进行了研究。鳍间距（1.0、1.2、1.4毫米）和流深（16、20、24毫米）;据报道，空气侧传热系数最高的几何构型。根据Colburn j因子和Fanning摩擦因子f给出了不同几何构型的空气侧传热系数和压降结果。作为基于百叶音高的雷诺数的函数。

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