The air side thermal performance of wavy fins with rectangular winglets are studied using experimental and numerical methods. The following parameters are selected for investigation: the attack angle, placed location, span and length of the rectangular winglet. The results show that all parameters affect the thermal performance of the air side. The best configurations of the winglet that provide the maximum j/f(^1/3) for both winglet lengths are the 3.5 mm horizontal distance, 7 mm vertical distance, 60° attack angle and 1.25 mm winglet span. Moreover, the thermal performance comparisons between the optimal design of the wavy fin with winglet and normal wavy fin are reported. Wavy fins with winglets provide a larger heat transfer coefficient, pressure drop and j/f^(1/3) than those of normal wavy fins. For the j/f^(1/3) comparison, wavy fins with winglets provide a j/f^(1/3) greater than that of normal wavy fins by 5.4–14.6 %, with the Reynolds number ranging from 1650 to 4423.

利用实验和数值方法研究了带有矩形小翼的波浪形翅片在空气中的热性能。选择以下参数进行研究：矩形小翼的迎角，放置位置，跨度和长度。结果表明，所有参数都会影响空气侧的热性能。为两种小翼长度都提供最大j / f（^1/3）的小翼最佳配置是3.5毫米水平距离，7毫米垂直距离，60°迎角和1.25毫米小翼跨度。此外，报告了带有小翼的波浪形翅片的最佳设计与正常波浪形翅片之间的热性能比较。带小翼的波浪状翅片可提供更大的传热系数，压降和j / f ^（1/3）比普通的波浪鳍要大。对于j / f ^（1/3）比较，带有小翼的波浪状鳍状物的aj / f ^（1/3）比正常波浪状鳍状物的aj / f ^（1/3）大5.4-14.6％，雷诺数在1650至4423之间。