Abstract Wavy fins and vortex generators can separately enhance the thermal performance of heat exchangers. A novel combination of wavy fins and vortex generators is proposed in the present study to optimize the thermal performance of heat exchangers. The effects of the longitudinal vortices and attack angle of the vortex generators on the thermal performance of the novel combination are numerically studied. The longitudinal vortices are strengthened and weakened when the fluid flows over the crests and troughs of the bottom wall, respectively. The heat transfer on the pressure sides of both top and bottom wall surfaces is significantly larger than that on the corresponding suction sides. There is an optimal attack angle of 60°, which can provide the best heat transfer performance with a maximum 31.5% increase in the Nusselt number with only a 23.4% increase in the friction factor. The maximum thermal performance factor can be up to 1.23 with the optimal attack angle. Correlations for Nu and f are reported for both laminar and turbulent flows.

中文翻译：

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由安装有涡流发生器的两个波浪形翅片形成的锯齿形通道的热性能

摘要 波浪翅片和涡流发生器可以分别提高换热器的热性能。本研究提出了一种波浪形翅片和涡流发生器的新型组合，以优化热交换器的热性能。数值研究了涡流发生器的纵向涡流和攻角对新型组合热性能的影响。当流体流过底壁的波峰和波谷时，纵向涡流分别增强和减弱。顶壁和底壁表面压力侧的传热显着大于相应的吸力侧的传热。最佳攻角为60°，可提供最佳传热性能，努塞尔数仅增加23，最大提高31.5%。摩擦系数增加 4%。在最佳攻角下，最大热性能系数可达1.23。报告了层流和湍流的 Nu 和 f 的相关性。