Publication de 4 numéros par an
ISSN Imprimer: 0276-1459
ISSN En ligne: 1943-6181
Indexed in
AN ASSESSMENT OF THE CORRELATIONS FOR ENTRAINMENT AND DEPOSITION RATES IN ANNULAR FLOW FOR DRYOUT PREDICTION
RÉSUMÉ
The use of phenomenological modeling for the prediction of dryout is very attractive because it offers considerable flexibility and the ability to address a wide range of operating conditions. The approach requires knowledge of the rates of the droplet deposition and entrainment as its basic constituents. These rates are determined experimentally, with the experimental observations gathered and used in the form of correlations. Over the considerable period in which phenomenological modeling has been (and still is) under active development numerous measurements have been made and many correlations, correspondingly, have been developed. This presents the analyst or phenomenological code developer with the requirement to choose from among these many possibilities. The difficulty in this choice is compounded by the fact that it is desirable to choose correlations as a logically matched set rather than as independent entities in order to ensure that conditions associated with the correlations are as internally consistent as possible. We present here an attempt to identify suitable groupings of correlations and we compare their performance in predicting dryout against annular flow observations. The correlations are also compared to each other based on theoretical considerations and a framework is proposed through which the appropriateness of the parameters in a correlation can be judged. Finally, a preferred set of entrainment-deposition correlations among those studied is identified.
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Colombo Marco, Fairweather M., Walker Simon P., Kumar Mukesh, Moharana Avinash, Nayak Arun K., Joshi Jyeshtharaj B., Dasgupta Arnab, Chandraker Dinesh K., Vesa Tanskanen, Giteshkumar Patel, CFD model development for two-phase flows, in Advances of Computational Fluid Dynamics in Nuclear Reactor Design and Safety Assessment, 2019. Crossref
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Spirzewski Michał, Anglart Henryk, Stano Paweł M., Uncertainty and sensitivity analysis of a phenomenological dryout model implemented in DARIA system code, Nuclear Engineering and Design, 355, 2019. Crossref