紧密栅元棒束通道内的传热流动数值模拟  

Simulation of Thermal-Hydraulic Behavior in Tight Lattice Rod Bundle

作　　者：于意奇[1] 顾汉洋[1] 杨燕华[1] 程旭[1] 王小军[2] 

机构地区：[1]上海交通大学核科学与工程学院,上海200240 [2]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610041

出　　处：《核动力工程》2011年第2期53-58,共6页Nuclear Power Engineering

基　　金：空泡物理和自然循环重点实验室基金(9140C7103010706);国家自然科学基金(50806044);973项目(2007CB209804)

摘　　要：对紧密栅元棒束中心通道和壁面通道内空气的传热流动行为进行了数值研究;结合实验数据对壁面温度、剪应力、流体温度和速度以及湍动能等参数进行了分析。结果表明:随着节径比(P/D)的减小,紧密栅元棒束通道内参数的不均匀性会增加,在通道的间隙区会出现壁面温度的峰值。在紧密栅元组件的设计中应该考虑这种间隙区的高温点分布;通道壁面的周向导热对紧密栅的传热有较大影响。The turbulence air thermal-hydraulic behavior inside the center and wall channel in tight lat-tice bundles is investigated.The wall temperature,wall shear stress,bulk temperature,bulk velocity,turbulent kinetic energy and turbulent mixing rate are analyzed by comparing the computational results with experi-mental data.The results show the increase of the non-uniformity of the parameters in tight lattice and the dis-crepancy between the calculation and the experiment with the decrease of P/D,and a temperature maximum appears in the gap region.This should be taken into account in the design of the fuel assembly with tight lat-tices.It is necessary to take the circumferential heat conduction of the channel wall into consideration in the simulation.

关 键 词：紧密栅元 不均匀性 间隙 

分 类 号：TL33[核科学技术—核技术及应用]