Open AccessHEAT TRANSFER MODELLING OF TWO-PHASE FLOW IN ISOLATED CHANNEL
Author(s) -
Daniel Vlček,
Vojtěch Caha,
Martin Ševeček
Publication year - 2018
Publication title -
acta polytechnica ctu proceedings
Language(s) - English
Resource type - Journals
ISSN - 2336-5382
DOI - 10.14311/app.2018.14.0049
Subject(s) - nucleate boiling , boiling , mechanics , heat transfer , thermodynamics , critical heat flux , heat flux , channel (broadcasting) , tube (container) , materials science , thermal hydraulics , flow (mathematics) , boiling heat transfer , physics , engineering , electrical engineering , composite material
This paper deals with Post-CHF (critical heat flux) heat transfer with the focus on different regimes of film boiling. The new thermal-hydraulic code TUBE 2.0 is presented. This code uses the equation of energy conservation and predefined correlations to establish wall temperature, the departure of nucleate boiling ratio as well as other parameters of cooling in a simple geometry - an isolated channel. With experimental data of inverted annular film boiling from Stewart, the best-performing correlation for calculation of post-CHF heat transfer in the channel was determined. Finally, the new presented code TUBE 2.0 and subchannel code SUBCAL owned by Chemcomex a.s. are compared using results of various experiments conducted by Becker. Data from Stewart could not be used because of inability to predict the onset of boiling crisis with several correlations.