摘要
目前棒束通道中临界热流密度的预测多基于实验关系式,受限于特定的适用范围,无法有效外推或外推后预测精度下降。为满足不同轻水堆中临界热流密度的预测要求,有必要开发适用于不同几何尺寸及热工边界的宽范围临界热流密度预测方式。本文以子通道分析方法为基础,考虑偏离泡核沸腾和干涸两类临界现象,通过耦合子通道分析程序与临界热流密度机理模型,实现对棒束通道中临界热流密度的计算。通过与临界热流密度实验数据的对比,初步证明了耦合程序对棒束通道中临界热流密度具有较好的预测精度。
At present,the prediction of the critical heat flux(CHF)in the rod bundles is mostly based on the experimental correlations,which is limited by the specific application range,and cannot be effectively extrapolated or the prediction accuracy is reduced.In order to meet the prediction requirements of CHF in different light water reactors,it is necessary to develop a wide range of CHF prediction methods for different geometries and thermal boundaries.Based on the sub-channel analysis method,the two types of critical phenomena were considered in the paper,which were departure from nucleate boiling(DNB)and dryout,and the CHF in the bundles through coupling sub-channel analysis code and the CHF mechanistic model was calculated.By comparing with the experimental data of CHF,it is proved that the coupling code has better prediction accuracy for the CHF in the rod bundles.
作者
桂民洋
田文喜
吴迪
陈荣华
张魁
苏光辉
秋穗正
GUI Minyang;TIAN Wenxi;WU Di;CHEN Ronghua;ZHANG Kui;SU Guanghui;QIU Suizheng(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2021年第11期1930-1938,共9页
Atomic Energy Science and Technology
基金
国家自然科学基金(11622541)。
关键词
临界热流密度机理模型
偏离泡核沸腾
干涸
子通道模型
耦合计算
critical heat flux mechanistic model
departure from nucleate boiling
dryout
sub-channel model
coupled calculation