Optimization of the angle of attack of delta-winglet vortex generators in a plate-fin-and-tube heat exchanger

  • Delta-winglet vortex generators (VGs) are known to enhance the heat transfer between the energy-carrying fluid and the heat transfer surfaces in plate-fin-and-tube banks. In this study optimal angles of attack of the delta-winglets are investigated based on the Pareto optimal strategy. The optimization process combines a CFD analysis, genetic algorithms and the response surface methodology. The angle of attack of a pair a delta-winglet-type VGs mounted behind each tube is varied between β = −90° and +90°. Three circular tube rows with inline and staggered tube arrangements are investigated for Reynolds numbers from 200 to 1200 (based on the inlet height and inlet velocity). The flow structure and heat transfer behavior is analyzed in detail for certain cases and the staggered and the inline tube arrangements are compared. Finally, for each of these arrangements the optimal sets of angles of attack for different Reynolds numbers are presented.

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Metadaten
Author:A. Lemouedda, Michael BreuerORCiD, E. Franz, T. Botsch, A. Delgado
DOI:https://doi.org/10.1016/j.ijheatmasstransfer.2010.07.017
ISSN:0017-9310
Parent Title (English):International Journal of Heat and Mass Transfer
Publisher:Elsevier BV
Document Type:Article
Language:English
Reviewed:Begutachtet/Reviewed
Release Date:2024/07/08
Volume:53
Issue:23/24
Pagenumber:14
First Page:5386
Last Page:5399
institutes:Fakultät Verfahrenstechnik
Research Themes:Energie & Ressourcen
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