带格架四棒束超临界水流动传热数值分析  

Numerical Simulation of Supercritical Water Flow and Heat Transfer in 4-rod Bundle

作　　者：何斯琪[1,2] 顾汉洋[1] 李虹波[3] 杨珏[3] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]国家核电技术有限公司北京软件技术中心,北京100029 [3]中科华核电技术研究院有限公司,广东深圳518026

出　　处：《原子能科学技术》2014年第2期257-262,共6页Atomic Energy Science and Technology

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 .

关 键 词：超临界水 棒束 数值模拟 定位格架 

分 类 号：TK124[动力工程及工程热物理—工程热物理]