In this analysis, the baffling method is used to increase the efficiency of channel heat exchangers (CHEs). The present CFD (computational fluid dynamics)-based work aims to analyze the constant property, steady, turbulent, Newtonian, and incompressible fluid flow (air), in the presence of transverse-section, arc-shaped vortex generators (VGs) with two various geometrical models, i.e., arc towards the inlet section (called arc-upstream) and arc towards the outlet section (called arc-downstream), attached to the hot lower wall, in an in-line situation, through a horizontal duct. For the investigated range of Reynolds number (from 12,000 to 32,000), the order of the thermal exchange and pressure loss went from 1.599–3.309 to 3.667–21.103 times, respectively, over the values obtained with the unbaffled exchanger. The arc-downstream configuration proved its superiority in terms of thermal exchange rate by about 14% than the other shape of baffle. Due to ability to produce strong flows, the arc-downstream baffle has given the highest outlet bulk temperature.

中文翻译：

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各种弧形通道的计算流体动力学模拟和传热特性比较

在此分析中，采用折流法来提高通道换热器（CHE）的效率。当前基于CFD（计算流体动力学）的工作旨在分析存在两个横截面的弧形涡流发生器（VG）的情况下的恒定特性，稳定，湍流，牛顿和不可压缩的流体流（空气）。各种几何模型，即通过水平管道以直列方式连接到热的下壁的弧形朝向入口段（称为弧上游）和弧形朝向出口段（称为弧下游）。对于研究的雷诺数范围（从12,000到32,000），热交换和压力损失的顺序分别是不折流板交换器获得的值的1.599–3.309倍至3.667–21.103倍。弧形下游构型证明了在热交换率方面比其他形状的导流板优越约14％。由于产生强气流的能力，弧形下游挡板的出口本体温度最高。