TURBULENT MIXING MODEL APPLICABLE TO SUPERCRITICAL CONDITION
The 5th International Symposium on SuperCritical Water-cooled Reactors - 2011 March 13-16


Presented at:
The 5th International Symposium on SuperCritical Water-cooled Reactors
2011 March 13-16
Location:
Vancouver,Canada
Session Title:
Critical Flow and Turbulent Mixing

Authors:
Bo Zhang (Xi'an Jiaotong University)
Jianqiang Shan (Xi'an Jiaotong University)
Jing Jiang (Xi'an Jiaotong University)
  

Abstract

In the design of a nuclear reactor, it is very important to predict the detailed flow and temperature distributions in the reactor core. The turbulent velocity fluctuation across the gap is an important parameter determining the inter-channel exchange, but the existing correlations show a rather large discrepancy with each other under supercritical conditions. Two types of subchannel lattices, triangular and square arrays are selected to be investigated using the CFD tools. The thermal-hydraulic behavior was investigated between the subchannels. A turbulent mixing correlation developed applicable under the supercritical condition was conducted under the adiabatic condition, a modifying factor was given for heating. Finally, the model was compiled into the subchannel code to analyze the CANFLEX bundle.

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