中国科学院大学学报2018，Vol.35Issue(2)：200-208,9.DOI:10.7523/j.issn.2095-6134.2018.02.008
压水堆燃料棒束新型定位格架的数值分析
Numerical analysis of a novel spacer grid in rod bundles of PWR
摘要
Abstract
Spacer grid is an important part of fuel assembly in reactor.The AFA-2G/3G spacer with mixing vane supports rod bundles well and enhances the heat transfer,but it has a complex structure and difficult processing.A novel spacer grid with the rectangular longitudinal vortex generators (RLVGs) is designed to improve thermal-hydraulic characteristics of fuel assembly.Based on the standard k-ε model with the enhanced wall treatment,a three-dimensional numerical simulation of the novel spacer grid in the channel of PWR fuel rods is presented.The effects of Reynolds number and attack angle are investigated.Numerical results show that the second flow generated by LVGs spreads to the downstream region of spacer grid and improves the heat transfer.The spacer grids with RLVGs with attack angles of 60° and 45° result in almost equal heat transfer performances.However,the spacer grid with RLVGs with attack angle of 60° brings about more pressure drop in comparison with that of the 45 ° case.The present research on new fuel assembly has certain potential value for the engineering design.关键词
燃料组件/定位格架/涡旋发生器/CFDKey words
fuel assembly/spacer grid/longitudinal vortex generator/CFD分类
能源科技引用本文复制引用
梁好玉,武俊梅..压水堆燃料棒束新型定位格架的数值分析[J].中国科学院大学学报,2018,35(2):200-208,9.基金项目
国家自然科学基金(51336006)资助 （51336006）
