定位格架对超临界水冷堆堆芯换热的影响  

Effect of grid spacer on heat transfer of supercritical water flows in reactor core

作　　者：邱庆刚[1] 丁雅倩[1] 朱晓静[1] 杜鑫[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《热科学与技术》2017年第1期20-25,共6页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51406026);河南省高校科技创新团队支持计划资助项目(16IRTSTHN017)

摘　　要：在压力为25 MPa、质量流速800kg/(m^2·s)、热流密度600kW/(m2·K)的条件下,对超临界水冷堆堆芯(燃料棒直径D=8.0mm,节径比P/D=1.2)类三角形子通道内超临界水的换热特性进行研究。用结构化的六面体网格以及计算流体动力学软件ANSYS CFX对堆芯的换热情况进行了模拟。以无定位格架子通道为基准,对比阻流片型定位格架对通道内流体换热的作用。结果表明,在超临界压力下阻流片型定位格架能够明显增强换热,降低最高包壳温度。另外,不同焓值区定位格架对换热的影响存在差异。Focuses on the local heat transfer performance of triangular sub-channel in the supercritical pressure water-cooled reactor（SCWR）with the pressure value of 25 MPa,mass rate of 800kg/（m2·s）,heat flux value of 600kW/（m2·K）.The fuel rod diameter is 8.0mm,and the ratio of pitch to diameter is 1.2.Flow and heat transfer of supercritical water has been investigated using the computational fluid dynamics code ANSYS CFX and used ANSYS ICEM to get polyhedral meshes.Numerical simulation can be used to analysis the feasibility of enhanced heat transfer and reduce cladding temperature by grid spacer with blockage discs.In addition,the different results of heat transfer between applying the grid spacer in high enthalpy region and low enthalpy region in sub-channel is reported.

关 键 词：超临界水冷堆 定位格架 类三角形子通道 壁面温度 传热系数 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]