Effects of Rectangular Wing Vortex Generators on the Thermal-Hydraulic Performance of Louvered Fin and Flat Tube Heat Exchanger

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  • 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
    2. Automobile Research Institute of China Heavy Duty Automobile Group Co. Ltd., Ji’nan 250031, China

Online published: 2023-11-28

Supported by

The research is supported by the National Natural Science Foundation of China (51875238).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Abstract

In this paper, a novel composite heat transfer enhancement technique comprised of louvered fins (LFs) and rectangular wing vortex generators (RWVGs) is proposed to improve the LF side thermal-hydraulic performance of louvered fin and flat tube heat exchangers (LFHEs). After validation of the LF side pressure drop ∆P and heat transfer coefficient hLF of the baseline by experiments, the numerical method is applied to investigate the influential mechanisms of the RWVG parameters (the number N (7 to 15), attack angle β (30° to 90°), height HVG (0.8 mm to 2 mm) and width WVG (0.8 mm to 1.2 mm)) on the performance of the LFHE in the velocity range of 3 m/s to 10 m/s. Results show that thermal-hydraulic performance of the LFHE is significantly impacted by the RWVGs, and according to the performance evaluation criteria (PEC), the LFHE achieves its optimal thermal-hydraulic performance when N=7, β=45°, HVG=1.8 mm and WVG=1 mm. Compared to the baseline, the maximum, minimum and average increments of PEC for the optimal case are 13.85%, 4.67% and 8.39%, respectively.

Cite this article

ZHANG Jinglong, HU Xingjun, LUO Yufei, HUI Zheng, WANG Jingyu, YU Tianming . Effects of Rectangular Wing Vortex Generators on the Thermal-Hydraulic Performance of Louvered Fin and Flat Tube Heat Exchanger[J]. Journal of Thermal Science, 2023 , 32(2) : 628 -642 . DOI: 10.1007/s11630-023-1763-5

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