One-dimensional interfacial area transport for bubbly two-phase flow in vertical 5 × 5 rod bundle

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

10 Scopus Citations
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Author(s)

  • Hang Liu
  • Liang-ming Pan
  • Wen-xiong Zhou
  • Quan-yao Ren
  • Song-song Li

Detail(s)

Original languageEnglish
Pages (from-to)257-273
Journal / PublicationInternational Journal of Heat and Fluid Flow
Volume72
Publication statusPublished - 1 Aug 2018
Externally publishedYes

Abstract

For the modeling of the interfacial structure characteristics, an experiment of vertical adiabatic air-water flow has been conducted under an atmosphere pressure condition. The experimental facility is composed of 5 × 5 rods arranged on a square pitch in a square casing with 9.5 mm outside rod diameter and 12.6 mm pitch, simulating a prototypic rod bundle in nuclear reactors. The miniaturized four-sensor conductivity probe has been developed to allow for the experimental measurement in the small flow channel. Extensive data are acquired for one-dimensional flow parameters including axial development of void fraction, interfacial area concentration and gas velocity. The effect of a prototypic spacer grids with mixing vanes on the flow structure has been discussed at various flow conditions based on the experimental data. Two competing effects, “swirling effect” and “bubble breaker effect”, are identified. The effect vanishes out within a short distance from the space grid. A drift-flux correlation is developed for predicting void fraction of adiabatic bubbly two-phase flow in a vertical rod bundle. Existing interfacial area correlations are tested and Hibiki-Ishii correlation (2002b) is recommended as most accurate correlation to predict the interfacial area concentration. It is expected that the newly obtained data in the 5 × 5 rod bundle is useful for developing the interfacial area transport equation and benchmarking a computational code.

Research Area(s)

  • Gas velocity, Interfacial area concentration, Rod bundle, Spacer grids, Void fraction

Bibliographic Note

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Citation Format(s)

One-dimensional interfacial area transport for bubbly two-phase flow in vertical 5 × 5 rod bundle. / Liu, Hang; Pan, Liang-ming; Hibiki, Takashi; Zhou, Wen-xiong; Ren, Quan-yao; Li, Song-song.

In: International Journal of Heat and Fluid Flow, Vol. 72, 01.08.2018, p. 257-273.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review