7棒束紧密栅元流体流动传热数值研究  

Numerical Simulation of Flow and Heat Transfer Behavior in Tight 7-rod Bundles

作　　者：何斯琪[1] 赵冬建[2] 于意奇[1] 顾汉洋[1] 程旭[1] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]上海核工程研究设计院,上海200233

出　　处：《原子能科学技术》2012年第B09期199-205,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(91026020);国家重点基础研究发展计划资助项目(2007CB209804)

摘　　要：紧密栅元内的流体流动传热研究对高转化比反应堆燃料组件的优化有十分重要的意义。本文采用CFD方法对7棒束紧密栅元棒束通道内流体流动传热现象进行了数值模拟,并与7棒束紧密栅元内氟利昂流体传热的实验结果进行对比分析,详细分析了定位格架对棒束内流体传热流动的影响。结果表明:数值计算所得的非加热棒的壁面温度和实验吻合良好,定位格架的存在对其下游流体流动、棒束最高温度分布及交混系数有明显的影响,棒束某些位置因流动滞止导致温度大幅上升,在设计中应加以注意。The research activities about tight lattice rod bundles were ongoing worldwide to optimize nuclear rod bundles.However,there still exists large deficiency in research of the effects of spacer grid structure.In this paper,the heat transfer experiment in a tight-lattice 7-rod bundle with spacer grids was simulated with the computational fluid dynamics（CFD） code.The numerical simulation was validated by comparing numerical results with experimental data.The extra simulation was conducted for the bare rod bundle to investigate the effects of grid structure on the flow and heat transfer.The investigation results show that the maximum surface temperature and the derived average turbulent mixing coefficient are sensitive to the structure of grid.

关 键 词：紧密栅元 棒束 定位格架 交混系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]