定位格架对棒束通道出口温场分布影响研究  

Study on the Influence of Spacer Grid on Temperature Field Distribution at Rod Bundle Channel Outlet

作　　者：仇子铖[1] 谢士杰[1] 郎雪梅[1] 李朋洲[1] 卓文彬[1] Qiu Zicheng;Xie Shijie;Lang Xuemei;Li Pengzhou;Zhuo Wenbin(CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院中核核反应堆热工水力技术重点实验室,成都610213

出　　处：《核动力工程》2024年第2期116-122,共7页Nuclear Power Engineering

摘　　要：为分析定位格架交混能力,进一步优化定位格架热工设计方法。本文通过实验研究不同结构定位格架对棒束通道出口温场分布的影响。实验中,系统压力为7.0~16.5 MPa,质量流速为900~4500 kg·m^(-2)·s^(-1),实验段进出口温差为30~128℃。实验结果表明,在压水堆运行参数范围内,对于相同定位格架结构形式,不同压力、进出口温差、质量流速等热工参数条件下棒束通道出口截面子通道最高温度和最低温度的差值与进出口温差的比值没有明显变化趋势;交混翼主导了定位格架的交混作用,II型交混翼带来较强的交混作用;对于D型定位格架,非对称的条带结构会导致流场整体出现一定的偏转,一定程度上降低了定位格架的交混作用。To analyze the mixing ability of the spacer grid and further optimize the thermal design method of the spacer grid,this article investigates the influence of spacer grid with different structures on the temperature field distribution at the outlet of rod bundle channel through experiments.In the experiments the system pressure is 7.0~16.5 MPa,the mass velocity is 900~4500 kg/m^(2)s,and the temperature difference between the inlet and outlet of the experimental section is 30~128℃.The experimental results show that,within the range of PWR operating parameters,the ratio of the difference between the maximum and minimum temperatures of the subchannel at the bundle channel outlet section to the temperature difference at the inlet and outlet has no obvious change trend under different thermal parameters such as pressure,inlet and outlet temperature difference and mass flow rate for the same spacer grid structure.The mixing wing dominates the mixing effect of the spacer grid,and Type II mixing wing has stronger mixing effect.For the D-type spacer grid,the asymmetric strip structure will lead to a certain deflection of the whole flow field,which will reduce the mixing effect of the spacer grid to some extent.

关 键 词：定位格架 棒束通道 温场分布 

分 类 号：TL33[核科学技术—核技术及应用]