Abstract The thermal performance of a compact heat exchanger with flat tubes was numerically investigated in a laminar regime by introducing longitudinal vortex generators (LVG) in arrays comprising: 9 alternating, 18 alternating, 18 aligned, 27 alternating and 39 alternating LVG. Vortex generators, in the form of delta winglets with an angle of attack of 35o, were used. For each geometry, the local heat flux, local and global Nusselt number and the friction factor were analysed. The Reynolds number varied between 400 and 2000.

中文翻译：

---

在扁平管的紧凑型换热器中通过纵向涡流发生器增强传热

摘要 通过在阵列中引入纵向涡流发生器 (LVG)，在层流状态下对具有扁平管的紧凑型换热器的热性能进行了数值研究，该阵列包括：9 个交替、18 个交替、18 个对齐、27 个交替和 39 个交替 LVG。使用了攻角为 35o 的三角形小翼形式的涡流发生器。对于每个几何形状，分析了局部热通量、局部和全局努塞尔数以及摩擦系数。雷诺数在 400 到 2000 之间变化。