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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

BOILING TRANSITION AND THE POSSIBILITY OF SPONTANEOUS NUCLEATION UNDER HIGH SUBCOOLING AND HIGH MASS FLUX DENSITY FLOW IN A TUBE

Get access (open in a dialog) DOI: 10.1615/IHTC8.780
pages 2197-2202

Abstract

Boiling transition and inverted annular heat transfer for R-113 have been investigated experimentally in a horizontal tube of 1.2 ×10−3 meter inner diameter with heating length over inner diameter ratio of 50. Experiments cover a high mass flux density range, a high local subcooling range and a wide local pressure range. Heat transfer characteristics were obtained by using heat flux control steady-state apparatus.
Film boiling treated here is limited to the case of inverted annular heat transfer with very thin vapor film, on the order of 10−6 meter. Moreover, film boiling region is always limited to a certain downstream part, since the system has a pressure gradient along the flow direction.
Discussions are presented on the parametric trends of boiling heat transfer characteristic curves and characteristic points. The possible existence is suggested of a spontaneous nucleation control surface boiling phenomena. And boiling transition heat flux and inverted annular heat transfer were correlated.