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International Heat Transfer Conference 7

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

EFFECT OF SUCTION ON IMPINGEMENT HEAT TRANSFER

N. T. Obot
Department of Chemical Engineering McGill University, Montreal, Canada; Fluid Mechanics, Heat and Mass Transfer Laboratory, Department of Chemical Engineering, Clarkson University, Potsdam, New York 13699-5705

DOI: 10.1615/IHTC7.2020
pages 389-394

Abstract

The effect of suction on average heat transfer coefficients between an isothermal permeable plate and impinging round jets was studied for suction velocities in the range 0.3−0.7% of the nozzle exit average velocity. Of the two identical nozzles' used, one generated an unconfined jet while the impingement flow from the second nozzle was partially confined by a 348 mm diameter plate that was structurally an extension of the nozzle plate. Two Reynolds numbers were used and the jet-to-plate spacing was varied between 2 and 10 jet diameters. For unconfined and partially confined jets, the general effect of applying moderate suction is to increase average heat transfer coefficients by roughly a constant amount, the absolute increase being larger with than without confinement.

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