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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

COOLANT BOILING CRISIS IN ROD ASSEMBLIES

Get access (open in a dialog) DOI: 10.1615/IHTC6.3450
pages 47-52

要約

The analysis of experimental data on boiling crisis obtained by different authors using rod assemblies and comparison of these data with our results using a rod assembly with subchannels having the same hydraulic parameters made it possible to find typical laws of operating and design parameters when boiling crisis occurs. A conclusion is drawn relating to a two-phase flow pattern effect upon conditions of boiling crisis onset. A technique of boiling crisis calculation is proposed for water boiling in rod assemblies considering flow patterns of a two-phase mixture, geometry of assemblies, non-uniform heat generation over the length and effect of spacing grids. Most experimental data obtained in our country and abroad for rod assemblies both with uniform and non-uniform heat generation over the length within the pressure range (5.0−18.6) 106 N/m2 and mass velocities 400−5000 kg/(m2s) are described by the calculation technique proposed here with an accuracy sufficient for practical use.