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

被引：0
|
作者：
Su Q. [1 ]
Fan G. [1 ]
Lyu L. [1 ]
Lu D. [1 ]
Yang P. [2 ]
Gan F. [2 ]
Yan B. [3 ]
Wang C. [3 ,4 ]
机构：
[1] China Nuclear Power Technology Research Institute Co., Ltd., Guangdong, Shenzhen
[2] Shanghai Nuclear Engineering Research & Design Institute Co., Ltd, Shanghai
[3] Sun Yat-sen University, Guangdong, Zhuhai
[4] Nanjing University of Science and Technology, Nanjing
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2023年 / 44卷 / 04期
关键词：
5×5 rod bundle; CFD; Grid spacer;
D O I：
10.13832/j.jnpe.2023.04.0088
中图分类号：
学科分类号：
摘要：
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. © 2023 Yuan Zi Neng Chuban She. All rights reserved.
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页码：88 / 94
页数：6
相关论文
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