中文摘要：

本文建立了一种百叶窗翅片的二维模型，并使用ANSYS Fluent对较高雷诺数下百叶窗翅片的不同倾斜角度对流体流动和传热的影响进行了研究。结果表明，在翅片倾斜角等于33°时，努塞尔数达到最大值，翅片的传热性能最好。在相同雷诺数下，压降随倾斜角度的增加不断增大。在相同的倾斜角度下，雷诺数增加，努塞尔数增大，但同时压降也会变大。通过相同泵功下的换热量来衡量百叶窗翅片的综合性能，得到在倾斜角为19°时，翅片的综合效能最高。

英文摘要：

A two-dimensional model of the louver fin was established in this paper, and the influence of louver fins under different tilt angles on fluid flow and heat transfer at relatively high Reynolds number was analyzed by ANSYS Fluent. Results showed that when the louver fin tilt angle was 33°, the Nusselt number reached the maximum and the louver fin had the best heat transfer performance. The pressure drop increased with the increase of the tilt angle at the same Reynolds number. At the same tilt angle, both the Nusselt number and the pressure drop increased with the increment of the Reynolds number. By measuring the amount of heat transfer in the same pump power, it could be obtained that the louver fin had the best comprehensive performance when the tilt angle was 19°.