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Abstract

A theoretical model is put forward to describe the flow velocity of the vapour phase near a heated wall when departure from nucleate boiling (DNB) is approached. The model refers to experimental observations which have been put into correlations and presented in an earlier article. It consists in a possible extrapolation of these previously proposed DNB correlations towards the determination of the maximum critical heat flux in cooling water under forced convection. Comparison is made with the well-known Kutateladze/Zuber correlation, which usually applies to CHF in saturated pool boiling. It is suggested that the present hydrodynamic model could generate analogous results by using a different approach. Moreover, it is shown that the model could equally be applied to determine the DNB limit in both free and forced convection, constituting a link between them.

Additional information

Authors: HEBEL W CEC BRUXELLES (BELGIUM) DE TAVERNIER W CEN-SCK, MOL (BELGIUM) , CEC BRUXELLES (BELGIUM);CEN-SCK, MOL (BELGIUM)
Bibliographic Reference: NUCLEAR ENGINEERING AND DESIGN, VOL. 74 (1982), PP. 253-257
Record Number: 1989122011600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en