Drift-flux correlation for rod bundle geometries

作者：Clark Collin^*; Griffiths Matthew; Chen Shao Wen; Hibiki Takashi; Ishii Mamoru; Ozaki Tetsuhiro; Kinoshita Ikuo; Yoshida Yoshitaka

来源：International Journal of Heat and Fluid Flow, 2014, 48: 1-14.

DOI：10.1016/j.ijheatfluidflow.2014.03.008

• Rod bundle
• Two-phase flow
• Void fraction
• Drift-flux
• Boiling water reactor

A new drift-flux correlation has been developed to predict void fraction over a wide range of two-phase flow conditions in rod bundle geometries. An experimental database that represents low liquid flow and low pressure conditions in a scaled 8 x 8 rod bundle test facility is emphasized for this work. At these conditions, recirculating flow patterns may affect two-phase flow characteristics. Such effects may not be appropriately considered in earlier rod bundle correlations for drift velocity and distribution parameter. In the current approach, an existing drift-flux correlation that accounts for the effect of recirculating flow as two-phase flow regimes transition from bubbly to cap-bubbly flow is incorporated to determine distribution parameter. A performance analysis demonstrates that the proposed correlation improves upon existing correlations with an average relative error of +/- 4.5% when predicting the database utilized for in this work The new correlation is also demonstrated to scale appropriately to prototypic plant conditions.

• 出版日期2014-8
• 单位清华大学