Publicado 4 números por año
ISSN Imprimir: 0276-1459
ISSN En Línea: 1943-6181
Indexed in
UNDERSTANDING AND MODELLING DNB IN FORCED CONVECTIVE BOILING: MODELLING OF A MECHANISM BASED ON NUCLEATION SITE DRYOUT
SINOPSIS
Two existing mechanisms for DNB in forced convective boiling are unified into one which, based on nucleation site dryout, a priori covers the whole range of DNB, from bubbly to slug flow Two modelling approaches are explored. A first, simplified model, based on a global heat balance in the wall under a dry patch, enables the CHF to be calculated, distinguishing the case of thin and thick heating walls. From a comparison with CHF data, good results are obtained in a wide enough range. A second, detailed model, based on the two-dimensional unsteady thermal analysis of the wall in response to a nucleation cycle, is then developed in order to support the likeliness of the postulated mechanism in bubbly flow. A parametric study around a well-documented CHF data point, indicates some requirements for DNB to be reached.
-
Nikolayev V. S, Beysens D. A, Boiling crisis and non-equilibrium drying transition, Europhysics Letters (EPL), 47, 3, 1999. Crossref
-
Beysens D, Nikolayev V, Garrabos Y, Vapour spreading and the boiling crisis, Journal of Physics: Condensed Matter, 15, 1, 2003. Crossref
-
Nikolayev V.S., Beysens D.A., Lagier G.-L., Hegseth J., Growth of a dry spot under a vapor bubble at high heat flux and high pressure, International Journal of Heat and Mass Transfer, 44, 18, 2001. Crossref
-
Le Corre Jean-Marie, Yao Shi-Chune, Amon Cristina H., A mechanistic model of critical heat flux under subcooled flow boiling conditions for application to one- and three-dimensional computer codes, Nuclear Engineering and Design, 240, 2, 2010. Crossref
-
Le Corre Jean-Marie, Yao Shi-Chune, Amon Cristina H., Two-phase flow regimes and mechanisms of critical heat flux under subcooled flow boiling conditions, Nuclear Engineering and Design, 240, 2, 2010. Crossref
-
Liu Yang, Liu Wei, Shan Jianqiang, Zhang Bo, Leung L.K.H., A mechanistic bubble crowding model for predicting critical heat flux in subchannels of a bundle, Annals of Nuclear Energy, 137, 2020. Crossref
-
Yang Bao-Wen, Anglart Henryk, Han Bin, Liu Aiguo, Progress in rod bundle CHF in the past 40 years, Nuclear Engineering and Design, 376, 2021. Crossref
-
Liu Yang, Liu Wei, Gu Long, Shan Jianqiang, Zhang Lu, Su Xingkang, Existing DNB-type CHF mechanistic models and relations with visualized experiments in forced convective flow boiling: A review, Progress in Nuclear Energy, 148, 2022. Crossref
-
Kledy Michel, François Fabrice, Djeridi Henda, Barre Stephane, Delhaye Jean-Marc, Toward a local drift flux model for high-pressure, subcooled, convective boiling flows, International Journal of Heat and Mass Transfer, 177, 2021. Crossref