A Compact Heat Exchanger has a large heat transfer area per unit volume, which is achieved by utilizing extremely high-density fins. A pin fin is one of the most frequently used fins because of its advantages such as minimal pressure drop and ease of fabrication by adjusting geometric parameters such as fin height (h), fin spacing (a), fin back pitch (b), and fin diameter (d). A numerical examination was carried out on a pin fin to develop a correlation between the Colburn-j factor and friction f factor. The study was conducted for a large range of Reynolds (Re) values, encompassing both laminar (Re 200–2000) and turbulent regions (Re 2500–15000). ANSYS Fluent was used to conduct the CFD-based numerical analysis, with air at 300 K as the working fluid. The Colburn j factor and friction f factor data were acquired in this numerical study for various Reynolds numbers, as well as non-dimensional geometrical characteristics such as the fin diameter-to-fin spacing ratio (d/a), fin diameter-to-fin back pitch ratio (d/b), and fin diameter-to-fin height ratio (d/h) values. These data were validated using available experimental data from open literature. The correlations of the Colburn j factor and friction f factor were determined over a wide range of Reynolds numbers as well as the geometric characteristics of the pin fins, spanning the complete operational range of Compact Heat Exchangers for Aerospace and other applications.

紧凑型热交换器每单位体积具有较大的传热面积，这是通过利用极高密度的翅片来实现的。针翅片是最常用的翅片之一，因为它具有压降最小等优点，并且通过调整翅片高度 (h)、翅片间距 (a)、翅片背距 (b) 和翅片间距 (b) 等几何参数易于制造。翅片直径 (d)。对针翅进行了数值检查，以建立 Colburnj 因子和摩擦 f 因子之间的相关性。该研究针对大范围的雷诺 (Re) 值进行，涵盖层流区域 (Re 200–2000) 和湍流区域 (Re 2500–15000)。使用ANSYS Fluent进行基于CFD的数值分析，以300 K的空气作为工作流体。 Colburn j因子和摩擦f因子数据是在本数值研究中针对各种雷诺数以及无量纲几何特征（例如翅片直径与翅片间距之比 (d/a)、翅片直径与翅片间距）获得的。翅片背距比 (d/b) 和翅片直径与翅片高度比 (d/h) 值。这些数据使用公开文献中的可用实验数据进行了验证。 Colburn j因子和摩擦f因子的相关性是在各种雷诺数以及针翅片的几何特征上确定的，涵盖了航空航天和其他应用的紧凑型热交换器的整个操作范围。