Pareto Optimization of Heat Transfer Enhancement of Finned–Tube Heat Exchangers with Delta–Winglet Vortex Generators
Publication date
2009
Document type
Book part
Author
Organisational unit
Conference
6th International Symposium on Turbulence, Heat and Mass Transfer, (THMT-6), Sept. 14–18, 2009, Rome, Italy
Publisher
Begell House Inc.
Book title
Turbulence, heat and mass transfer 6 : proceedings of the Sixth International Symposium on Turbulence, Heat and Mass Transfer Rome, Italy, 14 - 18 September, 2009
First page
1015
Last page
1018
Peer-reviewed
✅
Part of the university bibliography
✅
Language
English
Abstract
For circular finned tubes often used in heat exchangers, the wake regions behind the tubes are regions with low heat transfer coefficient. Delta-winglet vortex generators on the fin surfaces reduce the width of the wake regions and improve the overall heat transfer rate. The present work studies numerically the effect of enhancing the performance of the finned-tubes using delta-winglets. Simulations were carried out on a model of three circular tube rows with circular fins for Reynolds numbers of 500, 700, and 900 (based on the inlet velocity and the hydraulic diameter of unit cell). Eighteen basic configurations with different number and positions of delta-winglets were investigated. The flow and heat transfer behaviors are analyzed for certain configurations. Finally, the optimal configurations are presented based on the Pareto optimality strategy.
Cite as
Lemouedda, A., Breuer, M., Franz, E.: Pareto Optimization of Heat Transfer Enhancement of Finned–Tube Heat Exchangers with Delta–Winglet Vortex Generators, 6th Int. Symp. on Turbulence, Heat and Mass Transfer, (THMT-6), Sept. 14–18, 2009, Rome, Italy, In: Turbulence, Heat and Mass Transfer 6, eds. K. Hanjalic, Y. Nagano and S. Jakirlic, ISBN 978–1–56700–262–1, pp. 1015–1018, Begell House Inc., New York, Wallingford (UK), (2009).
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