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Numerical Study of Heat Transfer and Analysis of Optimal Fin Pitch in Wavy Fin-and-Tube Heat Exchanger

机译:波纹管翅式换热器传热的数值研究及最佳翅片间距分析

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摘要

In this paper an analysis of laminar heat transfer and fluid flow in a wavy fin-and-tube heat exchanger has been carried out. Three-dimensional (3D) numerical simulation results of a circular tube heat exchanger were compared with published numerical and experimental results. The computational fluid dynamics (CFD) procedure was validated by comparing average Nusselt numbers, and good agreement between published and calculated results has been accomplished. The influence of inlet air velocity, varying from 0.5 to 5 m s~(-1), as well as fin pitch, varying from 0.4 to 4 mm, on heat transfer and pressure drop conditions has been studied. The results have shown that there is an optimal fin pitch for each air velocity, which gives the best heat exchanger performance from the heat transfer point of view.
机译:本文对波浪状翅片管式换热器中的层流传热和流体流动进行了分析。将圆管式换热器的三维(3D)数值模拟结果与已公开的数值和实验结果进行了比较。通过比较平均Nusselt数验证了计算流体动力学(CFD)程序,并且已实现公布结果与计算结果之间的良好一致性。研究了进气速度(0.5至5 m s〜(-1))以及翅片节距(0.4至4 mm)对传热和压降条件的影响。结果表明,每种风速都有一个最佳的翅片节距,从传热的角度来看,它可以提供最佳的热交换器性能。

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