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International Heat Transfer Conference 3

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

FORCED CONVECTION HEAT TRANSFER FROM SURFACES ROUGHENED BY TRANSVERSE RIBS

David Wilkie
United Kindom Atomic Energy Authority AEA Technology, Windscale, Seascale, Cumbria, CA20 1PF, UK

DOI: 10.1615/IHTC3.1540
pages 1-19

Sinopsis

Heat transfer and pressure drop data collected from annuli with heated roughened inner and unheated smooth outer surface, are presented for various inner surfaces roughened by transverse square and reotangular ribs, by applying the "Hall transformation", whose validity has been tested in rectangular channels and by studying the smooth friction factor. Rib heights varied from 0.1% to 1.6% of the equivalent diameter and pitch to height ratios from 2 1/2 to 50. The effect on friction factor of surface to coolant temperature ratio and of rib profile, width and helix angle have been investigated as have static pressure and Stanton number between ribs.

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