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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

EFFECT OF SEMI-CONFINEMENT ON IMPINGEMENT HEAT TRANSFER

Get access (open in a dialog) DOI: 10.1615/IHTC7.2030
pages 395-400

Resumo

The influence of semi-confinement, provided by a 348 mm diameter plate parallel to the impingement surface, on heat transfer was studied for several Reynolds numbers and jet-to-pl ate spacings in the range 2 to 16 nozzle diameters. With nozzles of diameter 10 and 20 mm, the limit of the confining plate extended radially to 17.4 and 8.7 jet hole diameters, respectively. The results show that semi-confinement can cause significant reductions in impingement heat transfer coefficient, with the largest effect occurring at small jet-to-plate spacings. Reducing the jet hole diameter by one-half and doubling the relative limit of confinement appear to have no significant effect on the magnitudes of the decrease in average heat transfer coefficient.