Numerical prediction of critical heat flux in narrow rectangular channels

作者：Zhou Lei^*; Liu Xiang Feng; Yan Xiao; Huang Yan Ping; Chen Bing De

来源：Nuclear Power Engineering, 2011, 32(4): 46-51.

• Experimental data
• Improved models
• Narrow rectangular channel
• Numerical models
• Numerical predictions
• Prediction accuracy
• Systematic deviation

Results calculated by the Weisman model and Kwon model are compared and analyzed based on the existing experimental data points. It reveals that the two models have similar tendency for the CHF ratio distribution while the Kwon model has little scattering thus is more accurate. Since both the existing bubble crowding models predict CHF in narrow rectangular channels with poor accuracy, they are not proposed to be used for NRCs directly. Considering the characteristics of a narrow rectangular channel, the Kwon model is modified and extended. The improved model has better prediction accuracy and eliminates the systematic deviation from the experimental results.

• 出版日期2011