This paper presents a numerical study of the hydrothermal air-side performance of a tubular heat exchanger fitted with flower baffles (FBs). The investigation was done by testing in-line and staggered FB arrangements for various baffles’ pitch ratios ($PR=1$, 1.5, 2, 2.5, and 3) with Reynolds number Re ranging from 3000 to 15,000. The results indicate that the use of the ${\mathrm{FB}}_s$ leads to stirring the stagnated zones downstream of the baffles, and improving the air mixture close to the tube walls, which, by consequence, presents an efficient solution to improve the thermal transfer coefficients. Also, the PR rise with a fixed blockage ratio of 0.5 leads to an increase of both the Nusselt number $Nu$ and friction factor $f$ values. The highest thermal performance factor η of 1.77 is achieved by using the in-line baffle arrangement at $PR=2.5$, $BR=0.5$, and $Re=3000$. Finally, and for other useful applications, reliable correlations have been developed to predict Nusselt number and friction factor.

本文对装有花挡板（FBs）的管状热交换器的水热空气侧性能进行了数值研究。通过测试各种挡板的螺距比的串联和交错式FB布置来完成调查（$P\mathrm{[R}=\mathrm{1个}$，1.5、2、2.5和3），雷诺数Re为3000到15,000。结果表明，使用${\mathrm{FB}}_s$导致搅动折流板下游的停滞区，并改善靠近管壁的空气混合物，因此，提供了一种提高传热系数的有效解决方案。同样，固定阻塞比为0.5时的PR升高会导致Nusselt数均增加$ñü$ 和摩擦系数 $F$价值观。通过在以下位置使用串联挡板装置可实现1.77的最高热性能系数η$P\mathrm{[R}=2.5$， $乙\mathrm{[R}=0.5$， 和 $\mathrm{[R}Ë=3000$。最后，对于其他有用的应用，已经开发出可靠的相关性来预测Nusselt数和摩擦系数。