The numerical studies on the modified airfoil fins channel using supercritical CO₂ as working fluid showed that front-dense and rear-sparse (FDRS) and front-sparse and rear-dense (FSRD) distributions of fins could enhance heat transfer by improving the distribution uniformity of temperature difference in channel. The match of local dense distribution of fins with the region near pseudocritical point could obtain better overall thermal performance in the modified airfoil fins heat exchanger. The differences of thermal-hydraulic performance among channels with uniform, FDRS and FSRD distributions of fins could be explained with field synergy principle. The FSRD distribution of fins is the optimum scheme in the three distributions of the modified airfoil fins channel, because its comprehensive performance is 23–29 % higher than that of the uniform distribution of fins and 2–7.6 % higher than that of the FDRS distribution of fins. The present work provides insights into the mechanisms of supercritical CO₂ heat transfer characteristics as well as practical guidance on the design and optimisation of relevant components.

_{超临界CO 2}改性翼型翅片通道的数值研究工作流体表明，翅片的前密后疏（FDRS）和前疏后密（FSRD）分布可以通过改善通道内温差的分布均匀性来增强传热。翅片的局部密集分布与伪临界点附近区域的匹配可以在改进的翼型翅片换热器中获得更好的整体热性能。翅片分布均匀、FDRS和FSRD分布的通道之间的热工水力性能差异可以用场协同原理来解释。FSRD分布翅片是改进翼型翅片通道三种分布中的最优方案，其综合性能比翅片均匀分布提高23-29%，比FDRS分布提高2-7.6%的鳍。₂传热特性以及相关部件设计优化的实用指导。