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Type: Journal article
Title: Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger
Author: Allison, C.
Dally, B.
Citation: International Journal of Heat and Mass Transfer, 2007; 50(25-26):5065-5072
Publisher: Pergamon-Elsevier Science Ltd
Issue Date: 2007
ISSN: 0017-9310
Statement of
C.B. Allison and B.B. Dally
Abstract: The experimental analysis of the effects of delta-winglet vortex generators on the performance of a fin and tube radiator is presented. The winglets were arranged in flow-up configuration, and placed directly upstream of the tube. This is a hitherto untested configuration, but is thought to have certain advantages. In addition to vortex generation the flow is guided onto the tube surface increasing the localised velocity gradients and Nusselt numbers in this region. The study includes dye visualisation and full scale heat transfer performance measurements. The results are compared to a standard louvre fin surface. It was found that the winglet surface had 87% of the heat transfer capacity but only 53% of the pressure drop of the louvre fin surface.
Keywords: Delta-winglet vortex generator; Compact tube–fin heat exchanger
Description: Copyright © 2007 Elsevier Ltd All rights reserved.
RMID: 0020074194
DOI: 10.1016/j.ijheatmasstransfer.2007.08.003
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Appears in Collections:Mechanical Engineering publications
Environment Institute publications

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