涡流器
传热
机械
强化传热
雷诺数
材料科学
湍流
鳍
热交换器
动态刮削表面换热器
板式换热器
湍流普朗特数
传热系数
环形翅片
微型热交换器
热力学
努塞尔数
物理
复合材料
临界热流密度
作者
Zhongyi Wang,Ruihao Wang,Zheng Li,Meng Wang,Lei Wan
标识
DOI:10.1016/j.applthermaleng.2023.120726
摘要
The corrugated fin is one of the common fin types in plate-fin heat exchangers. The corrugated fins can promote fluid turbulence and separate or destroy the boundary layer. To further increase the turbulence of the fluid in the channel, the cylindrical turbulator is innovatively added to the corrugated finned channel, and its effects on heat transfer and flow resistance is investigated by numerical simulation. Moreover, the field synergy theory is used to analyze why the heat transfer effect of the channel is improved after adding the cylindrical turbulator. Considering the heat transfer effect and flow resistance synthetically, the comprehensive performance of the heat transfer channel can be improved by adding the cylindrical turbulator at low Reynolds numbers. Correspondingly, at high Reynolds numbers, adding the cylindrical turbulator will reduce the comprehensive performance. On this basis, the influence of corrugated channel geometric sizes on the heat transfer and flow properties is investigated. The correlations of Reynolds number, Prandtl number and geometric dimension on heat transfer and friction factor is established for different geometrical dimensions. The correctness of the correlation is verified by choosing four models with random geometric dimensions, and the average absolute error of heat transfer and friction factor is 6.45% and 5.53%.
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