Abstract The Printed Circuit Heat Exchanger (PCHE) has attracted a lot of attentions recently due to its high efficiency and compactness, and the airfoil fin has excellent thermal–hydraulic performance compared with the zigzag channel in PCHE. Two novel fins were proposed in this study based on the configuration of NACA 0020 airfoil fin, in order to further improve the performance of airfoil fin PCHE. The thermal–hydraulic performance and the enhancement mechanism of the fins were numerically investigated using supercritical CO2 as the working fluid. The results showed that one of the novel fins has better comprehensive performance and less entransy dissipation than the NACA 0020 airfoil fin used in PCHE, since the j factor of this novel fin is 2.97–6.15% larger, and the pressure drop is 0–4.07% less than the NACA 0020 airfoil fin under the selected conditions. And the staggered arrangement and the proper shape of fins could reduce the effect of boundary layer and improve the thermal–hydraulic performance effectively. In addition, the enhancement mechanism of the novel fin PCHE could be explained with field synergy principle very well.

中文翻译：

---

超临界CO 2 印制电路换热器新型翼型翅片的数值研究

摘要 印制电路换热器（PCHE）因其高效、紧凑等优点而备受关注，翼型翅片与PCHE中的锯齿形通道相比具有优异的热工水力性能。本研究基于NACA 0020翼型翅片的配置提出了两种新型翅片，以进一步提高翼型翅片PCHE的性能。使用超临界 CO2 作为工作流体，对翅片的热工水力性能和增强机制进行了数值研究。结果表明，与PCHE中使用的NACA 0020翼型翅片相比，其中一种新型翅片具有更好的综合性能和更少的火积耗散，因为这种新型翅片的j因子大2.97-6.15%，压降为0-4 . 在选定的条件下，比 NACA 0020 翼型翅片少 07%。并且翅片的交错排列和适当的形状可以减少边界层的影响，有效地提高热工水力性能。此外，新型鳍片PCHE的增强机制可以用场协同原理很好地解释。