Measurement and modeling of two-phase flow parameters in scaled 8×8 BWR rod bundle

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

35 Scopus Citations
View graph of relations

Author(s)

  • X. Yang
  • J. P. Schlegel
  • Y. Liu
  • S. Paranjape
  • M. Ishii

Detail(s)

Original languageEnglish
Pages (from-to)85-97
Journal / PublicationInternational Journal of Heat and Fluid Flow
Volume34
Publication statusPublished - Apr 2012
Externally publishedYes

Abstract

The behavior of reactor systems is predicted using advanced computational codes in order to determine the safety characteristics of the system during various accidents and to determine the performance characteristics of the reactor. These codes generally utilize the two-fluid model for predictions of two-phase flows, as this model is the most accurate and detailed model which is currently practical for predicting large-scale systems. One of the weaknesses of this approach however is the need to develop constitutive models for various quantities. Of specific interest are the models used in the prediction of void fraction and pressure drop across the rod bundle due to their importance in new Natural Circulation Boiling Water Reactor (NCBWR) designs, where these quantities determine the coolant flow rate through the core. To verify the performance of these models and expand the existing experimental database, data has been collected in an 8 × 8 rod bundle which is carefully scaled from actual BWR geometry and includes grid spacers to maintain rod spacing. While these spacer grids are 'generic', their inclusion does provide valuable data for analysis of the effect of grid spacers on the flow. In addition to pressure drop measurements the area-averaged void fraction has been measured by impedance void meters and local conductivity probes have been used to measure the local void fraction and interfacial area concentration in the bundle subchannels. Experimental conditions covered a wide range of flow rates and void fractions up to 80%. © 2012 Elsevier Inc.

Research Area(s)

  • Axial development, Drift-flux models, Interfacial area concentration, Pressure loss, Rod bundle, Void fraction

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Measurement and modeling of two-phase flow parameters in scaled 8×8 BWR rod bundle. / Yang, X.; Schlegel, J. P.; Liu, Y.; Paranjape, S.; Hibiki, T.; Ishii, M.

In: International Journal of Heat and Fluid Flow, Vol. 34, 04.2012, p. 85-97.

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