An improved physical model for flooding limited CHF under zero and very low flow conditions

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This paper presents an improved physical model to obtain comprehensive understanding of the CHF characteristics and to predict the CHF values under zero and very low flow conditions. The improved model gives reasonable agreements with the experimental data for CHF locations and values. It provides details of physical information on the CHF phenomena, and analytically confirms that the flooding is a triggering mechanism of the countercurrent annular flow CHF under zero and very low flow conditions. The present model reveals that the heat flux effect such as entrainment due to nucleation should be considered for the analysis of the flooding limited CHF as the L/D ratio decreases. (C) 1998 Elsevier Science Ltd.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
1998-04
Language
English
Article Type
Article
Keywords

CRITICAL HEAT-FLUX; VERTICAL TUBE; CLOSED BOTTOM; PREDICTION; DRYOUT

Citation

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, v.25, no.3, pp.339 - 348

ISSN
0735-1933
URI
http://hdl.handle.net/10203/72521
Appears in Collection
NE-Journal Papers(저널논문)
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