期刊
ANNALS OF NUCLEAR ENERGY
卷 91, 期 -, 页码 206-214出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anucene.2016.01.025
关键词
Pressure drop experiments; Two-phase flow; Horizontal rod bundle; New correlation; Numerical simulation
资金
- Ministry of Education, China [IRT1280]
Pressure drop experiments were conducted for a vertical two-phase air-water flow across a horizontal staggered rod bundle under conditions of air quality ranging from 0.001 to 0.3 and mass velocity ranging from 80 to 500 kg/(m(2) s). The experimental data were thoroughly analyzed and compared with predictions from existing correlations. New developed expressions provided the most accurate predictions. The two-phase friction multipliers for G <= 200 kg/(m(2) s), which show a strong mass velocity effect, could be fit well in terms of the Martinelli parameter and the dimensionless mass velocity. The new correlation developed for the two-phase friction multiplier was successfully tested in predicting the experimental data for G <= 200 kg/(m(2) s) in previous experiments of other researchers. Distributions of velocity and turbulent intensity were also obtained from the numerical simulation on single-phase flow of water using the CFD code ANSYS FLUENT 14.0. The SST k-omega model was verified to be the best turbulent model to gain flow characteristics in the horizontal rod bundle under experimental conditions. (C) 2016 Elsevier Ltd. All rights reserved.
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