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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

LOCAL BOILING HEAT FLUX DENSITY AROUND A HORIZONTAL CYLINDER UNDER SATURATED AND SUBCOOLED CONDITIONS

Get access (open in a dialog) DOI: 10.1615/IHTC6.3810
pages 199-204

Abstract

A successful experimental technique, based on a quenching (transient) procedure and the use of a heat flux meter, has been developed to measure directly the local boiling heat flux density around large horizontal cylinders as a function of wall temperature under saturated and subcooled conditions A 3-dimensional unsteady-state conduction analysis is also presented which allows boiling curves to be generated from the cooling curves for points on the surface. Although the surface-average critical heat flux densities are shown to be predicted very well by known correlations, these experiments and analyses do reveal that there is considerable variation of CHF around the cylinder, probably resulting from the interation of the upflowing liquid-vapour boundary layer with the boiling phenomena.