Abstract In this study, to optimize the thermal performance on the airside of a flat-tube radiator, four parameters, including fin types, fin pitch, fin thickness, and louver angle, are numerically examined in detail. Existed experimental results are employed to verify the present numerical method with maximum deviations to be less than 1.65%, and 0.27% for heat transfer rate and outlet temperature, respectively. The frontal velocity ranges from 1 m/s to 6 m/s. Copper and aluminum are employed as the tube and fin materials, respectively. For all cases in this study, it is found that the thermal performance is significantly affected by the fin thickness, fin pitch, and fin types. The thermal performance significantly increases with the increase of the louver angle from 0° to 27°; however, it is only slightly increased with a further rise of the louver angle from 27° to 40.5°. A novel composite straight-and-louvered fin structure is proposed, and an optimal fin structure is found. The optimal fin structure could improve the thermal performance up to 17.52%, 18.31%, and 19.54% or 55.76%, 59.27%, and 60.22% compared to that of the SD louvered fin or the baseline at pumping powers of 2 W, 10 W, and 20 W, respectively.

中文翻译：

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复合直百叶翅片优化微通道平管散热器空气侧热性能

摘要 在本研究中，为了优化扁平管散热器空气侧的热性能，对翅片类型、翅片间距、翅片厚度和百叶窗角四个参数进行了详细的数值研究。现有的实验结果被用来验证当前的数值方法，最大偏差分别小于 1.65% 和 0.27% 的传热率和出口温度。正面速度范围从 1 m/s 到 6 m/s。铜和铝分别用作管和翅片材料。对于本研究中的所有情况，发现散热性能受翅片厚度、翅片间距和翅片类型的显着影响。随着百叶窗角度从0°增加到27°，热性能显着增加；然而，随着百叶窗角度从 27° 进一步增加到 40.5°，它只是略微增加。提出了一种新型的复合直百叶翅片结构，并找到了最佳翅片结构。与SD百叶窗翅片或2 W、10 W泵浦功率基线相比，最佳翅片结构可将热性能提高17.52%、18.31%和19.54%或55.76%、59.27%和60.22%和 20 W，分别为。