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International Heat Transfer Conference 7

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

HEAT TRANSFER ENHANCEMENT USING VORTEX GENERATORS

C. M. B. Russell
CE-Lummus, London, England

T. V. Jones
Department of Engineering Science and St. Anne's College, University of Oxford, England

G. H. Lee
Airship Industries Ltd., London, England

DOI: 10.1615/IHTC7.1850
pages 283-288

Abstract

High local heat transfer coefficients associated with vortex flow have been previously observed. Plate fin surfaces have therefore been developed on which local vortex generators produce a set of contra-rotating vortices between the fins which persist well downstream from the generators. Tests on such fin surfaces are described and results for these are presented. It is shown that considerable enhancement of heat transfer occurs, the pressure loss penalty associated with to the vortex generators being modest. From the experimental results, it is apparent that a ratio of Colburn "j" factor to "f" factor of more than 0.5 is achieved.

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