搅混翼定位格架排布方式对5×5棒束通道热工水力特性影响的CFD研究  

Effect of the Arrangement for Grid Spacers with Mixing Vanes on the Thermal Hydraulic Characteristics of a 5×5 Rod Bundle via CFD Analysis

作　　者：苏前华 范冠华 吕路路 卢冬华 杨萍[2] 干富军[2] 鄢炳火 王成跃 Su Qianhua;Fan Guanhua;Lyu Lulu;Lu Donghua;Yang Ping;Gan Fujun;Yan Binghuo;Wang Chengyue(China Nuclear Power Technology Research Institute Co.,Ltd.,Shenzhen,Guangdong,518026,China;Shanghai Nuclear Engineering Research&Design Institute Co.,Ltd,Shanghai,200233,China;Sun Yat-sen University,Zhuhai,Guangdong,519082,China;Nanjing University of Science and Technology,Nanjing,210094,China)

机构地区：[1]中广核研究院有限公司,广东深圳518026 [2]上海核工程研究设计院股份有限公司,上海200233 [3]中山大学,广东珠海519082 [4]南京理工大学,南京210094

出　　处：《核动力工程》2023年第4期88-94,共7页Nuclear Power Engineering

基　　金：国家科技重大专项子课题(2017ZX06002004)。

摘　　要：为探究棒束通道定位格架的最优排布方式,本文采用计算流体动力学(CFD)方法对包含3个格架部件的5×5棒束通道进行流场和温度场的数值仿真,研究格架轴向间距以及格架相对转角对通道阻力和传热特性的影响,并从对流传热的角度分析造成不同结果的原因。研究表明,在本文设计的计算工况下,改变格架轴向间距对棒束阻力和传热特性的影响较小;将中间格架在横截面内相对两端格架旋转90°放置能够有效降低横截面温度分布的不均匀性,减小横截面最高温度。In order to optimize the arrangement of the grid spacer for a rod bundle,the computational fluid dynamics(CFD)method is employed to analyze the flow and temperature fields for a 5×5 rod bundle equipped with three grid spacers.The effect of the axial separation between two neighboring grid spacers and the relative rotation angle of the grid spacer is investigated,and the reasons for different results are analyzed from the perspective of convective heat transfer.It is found that the variation of axial separation brings negligible change on the drag and heat-transfer characteristics of the rod bundle.However,rotating the middle grid by 90°relative to the grids at both ends in the cross section can effectively reduce the non-uniformity of temperature distribution in the cross section and reduce the maximum temperature in the cross section.

关 键 词：计算流体动力学(CFD) 定位格架 5×5棒束通道 

分 类 号：TK219[动力工程及工程热物理—动力机械及工程] TL334[核科学技术—核技术及应用]