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Experimental Study of the Flow in a Compact Heat Exchanger Channel with Embossed-type Vortex Generators

Article dans une revue avec comité de lecture
Author
DUPONT, Frédéric
GABILLET, Céline
ccBOT, Patrick
13094 Institut de Recherche de l'Ecole Navale [IRENAV]

URI
http://hdl.handle.net/10985/9495
DOI
10.1115/1.1595675
Date
2003
Journal
Journal of Fluids Engineering

Abstract

The isothermal flow in a model channel of plate-fin heat exchanger with periodically arranged embossed-like vortex generators is investigated. Velocity measurements are performed by LDA in the transitional regime (Reynolds number from 1000 up to 5000). Strong longitudinal vortices are observed downstream of each vortex generator. The vortex roll-up process is highlighted by the evolution of the velocity vector field in the cross section of the flow. The modifications of the vortex characteristics after successively encountered generators are investigated. This work shows most of the flow features which are known to produce heat transfer enhancement, and shows that these smooth shaped vortex generators are very promising for enhanced heat exchangers.

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