Title: Optimization of the angle of attack of delta-winglet vortex generators in a plate-fin-and-tube heat exchanger
Authors: Lemouedda, A. 
Breuer, Michael  
Franz, Eberhard 
Botsch, Tilmann W. 
Delgado, Antonio 
Language: en_US
Subject (DDC): DDC - Dewey Decimal Classification::000 Informatik, Wissen, Systeme
DDC - Dewey Decimal Classification::500 Naturwissenschaften
DDC - Dewey Decimal Classification::600 Technik
Issue Date: Nov-2010
Publisher: Elsevier
Document Type: Article
Source: In: International journal of heat and mass transfer. - Amsterdam [u.a.] : Elsevier, 1960- ; ZDB-ID: 240652-4 . - Bd. 53.2010, 23/24, Seite 5386-5399
Journal / Series / Working Paper (HSU): International journal of heat and mass transfer 
Volume: 53
Issue: 23/24
Page Start: 5386
Page End: 5399
Publisher Place: Amsterdam
Document Version: draft
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. © 2010 Elsevier Ltd. All rights reserved.
Organization Units (connected with the publication): Strömungsmechanik 
URL: https://api.elsevier.com/content/abstract/scopus_id/77956057933
ISSN: 00179310
DOI: 10.1016/j.ijheatmasstransfer.2010.07.017
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