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4.16 Rewet Heat Transfer in Hot Tubes Cooled by Bottom, Top Flooding and Falling Films

DOI: 10.1615/ICHMT.1982.AdvCourHeatTransfNucReactSaf.520
pages 797-808

N. G. Rassohin
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

L. P. Kabanov
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

V. M. Mordashev
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

S. P. Nikonov
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

R. H. Hasanov
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

O. M. Hachatrjan
Moscow Power Engineering Institute, Moscow E-250, Krasnokazarmennaya Street, 14, USSR

Abstract

Experimental procedure and experimental results of rewet heat transfer data in electric heated tube cooled by bottom forced flooding and also by top flooding and falling film for pressurized water reactor emergency core cooling conditions are presented. Empirical correlations on heat transfer ahead of rewetting front, rewetting velocity and heat flux in rewetting front are presented. Comparision of experimental data in tubes with and without spacers was done. Rewetting front holding-up(flooding) in experiments with falling film is explained not only by hydrodinamical, but also by thermal factors.

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