Shobhana Singh
Department of Energy Technology, Aalborg University, Aalborg, Denmark
Kim Sørensen
Department of Energy Technology, Aalborg University, Aalborg, Denmark
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http://dx.doi.org/10.3384/ecp1713813Published in: Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th – 27th, 2017
Linköping Electronic Conference Proceedings 138:1, p. 13-19
Published: 2017-09-27
ISBN: 978-91-7685-417-4
ISSN: 1650-3686 (print), 1650-3740 (online)
Vortex generator is considered as an effective device for
augmentation of the thermal-hydraulic performance of a
heat exchanger. The aim of present study is to examine
the influence of vortex generators on a double fin and
tube heat exchanger performance. Vortex generator of
rectangular winglet type is chosen and investigated at
different angles of attack 0 , ??10 and ??20 with the
flow direction. Three-dimensional numerical model is
developed and simulations are performed for a Reynolds
number range 5000 Re 11000 taking conjugate heat
transfer into account. The heat transfer and pressure loss
characteristics are determined and analyzed for an in-line
configuration of a fin and tube heat exchanger. In order to
evaluate the enhancement in the performance on an
equitable basis, the heat exchanger with plain fin surface
is considered as a reference design. Results show that the
angle of attack of a vortex generator has a significant
impact on the volume goodness factor, and enhance the
thermal performance of a fin and tube heat exchanger in
comparison to the design with plain fin. The vortex
generator at an angle of attack ??10 is found to perform
superior over the Reynolds number range studied. At
Re = 5000, the vortex generator with an angle of attack
??10 increases the volume goodness factor by 32% with
respect to the baseline heat exchanger design.
Fin and tube heat exchanger, vortex generator,
conjugate heat transfer, volume goodness factor