哈尔滨工程大学学报2023，Vol.44Issue(12)：2216-2223,8.DOI:10.11990/jheu.202309004
摇摆条件下含花瓣形棒束自然循环系统特性
Characteristics of natural circulation systems with petal-shaped fuel bundle channels under rolling motion
摘要
Abstract
To study the natural circulation characteristics of petal-shaped fuel bundle channels under rolling motion,a multiscale coupled numerical model was developed using the domain decomposition method,a self-designed 1D code,and 3D computational fluid dynamics software.The model′s reliability was verified using existing experimen-tal data,and the effect of rolling motion on the flow characteristics of a natural circulation system with petal-shaped fuel bundle channels was thoroughly analyzed.The results show that increased heating power can increase the tem-perature difference between the cold and hot legs in the loop.Consequently,the average flow rate increases and tends to stabilize.Increasing the fluid temperature reduces the viscosity of the fluid near the wall,thereby decrea-sing the resistance coefficient of the rod bundle channel.By introducing the instantaneous rolling Reynolds number,we obtained an expression for the resistance coefficient applicable to the low Reynolds number range under rolling motion.This study provides an important design basis for the application of petal-shaped fuel assemblies in sea-based nuclear power plants.关键词
自然循环系统/花瓣形燃料棒/摇摆运动/多尺度耦合模拟/流动特性/压降/摇摆雷诺数/阻力系数Key words
natural circulation system/petal-shaped fuel rod/rolling motion/multi-scale couple simulation/flow characteristic/pressure drop/rolling Reynolds number/resistance coefficient分类
能源科技引用本文复制引用
曹今毅,孙建闯,孟祥飞,张文超,杜利鹏,蔡伟华..摇摆条件下含花瓣形棒束自然循环系统特性[J].哈尔滨工程大学学报,2023,44(12):2216-2223,8.基金项目
国家自然科学基金项目(52306227). （52306227）
