摘要
棒束内超临界水流动传热是超临界水堆堆芯热工水力研究的重要内容,但对其认识还十分有限。本文针对四棒束内超临界水的流动传热现象开展数值模拟,特别分析了定位格架对棒束通道内流动和传热的影响。结果表明,采用SSG湍流模型计算所得到的棒束壁面温度和实验结果吻合良好,定位格架的存在影响下游流体的速度分布,显著提高格架下游的传热特性,交混系数有大幅上升,使得加热棒周向壁面温度分布更加平均,最高温度出现位置发生改变。
T he investigation on the thermal-hydraulic behavior in SCWR fuel bundles is a very significant content of SCWR research . However , there is still a lack of understanding to predict the flow heat transfer behavior of supercritical fluid .In this paper ,the heat transfer behavior of supercritical fluid in 4-rod bundle with spacer was numerically simulated .The effect of grid structure on the flow and heat transfer was discussed particularly .The numerical simulation using the SSG turbulent model gives a reasonable prediction compared with the experimental results .The calculation results show that the spacer significantly changes the velocity profile in the dow nstream ,and enhances turbulent mixing and heat transfer .Consequently ,the rod wall temperature appears more uniform in the circumferential direction and the peak wall temperature spot also shifts .
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第2期257-262,共6页
Atomic Energy Science and Technology
关键词
超临界水
棒束
数值模拟
定位格架
supercritical water
rod bundle
numerical simulation
grid spacer
作者简介
何斯琪（1988-），女，北京人，硕士研究生，从事计算流体动力学研究
