Modified distribution parameter for churn-turbulent flows in large diameter channels

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

21 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)138-150
Journal / PublicationNuclear Engineering and Design
Volume263
Publication statusPublished - 2013
Externally publishedYes

Abstract

Two phase flows in large diameter channels are important in a wide range of industrial applications, but especially in analysis of nuclear reactor safety for the prediction of BWR behavior and safety analysis in PWRs. To remedy an inability of current drift-flux models to accurately predict the void fraction in churn-turbulent flows in large diameter pipes, extensive experiments have been performed in pipes with diameters of 0.152 m, 0.203 m and 0.304 m to collect area-averaged void fraction data using electrical impedance void meters. The standard deviation and skewness of the impedance meter signal have been used to characterize the flow regime and confirm previous flow regime transition results. By treating churn-turbulent flow as a transition between cap-bubbly dispersed flow and annular separated flow and using a linear ramp, the distribution parameter has been modified for churn-turbulent flow. The modified distribution parameter has been evaluated through comparison of the void fraction predicted by the drift-flux model and the measured void fraction. © 2013 Elsevier B.V. All rights reserved.

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Citation Format(s)

Modified distribution parameter for churn-turbulent flows in large diameter channels. / Schlegel, J. P.; Macke, C. J.; Hibiki, T. et al.
In: Nuclear Engineering and Design, Vol. 263, 2013, p. 138-150.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review