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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

CRITICAL HEAT FLUX IN A FORCED CONVECTIVE SUBCOOLED BOILING WITH AN IMPINGING JET

Get access (open in a dialog) DOI: 10.1615/IHTC10.1380
pages 515-520

Аннотация

Critical heat flux during forced convective subcooled boiling on a rectangular heated surface of 40 or 60 mm in length and 7 mm in width, being supplied with subcooled liquids through a small round jet which impinges at the center of the surface has been studied experimentally employing three different liquids of water, Rl 13, and R22 at a pressure from 1 to 25 bar at a high subcooling condition up to 115 K.
A criterion is proposed that the CHF in the saturated region can be determined from the existing equation for the CHF for the saturated liquid, while for the same heat flux in the subcooled region, an equation can be derived from a simple heat balance on an assumption that the subcooled liquid is heated up at the saturation temperature at the leading edge of the saturation region. By eliminating the length of the subcooled region from the two equations and after revising it slightly, a generalized correlation can be derived, yielding about 82 % of the CHF data with an accuracy of ± 20 %.