沈阳航空航天大学学报2025，Vol.42Issue(4)：15-22,8.DOI:10.3969/j.issn.2095-1248.2025.04.003
雷诺数对风洞换热器性能的影响
Impact of Reynolds number on the performance of wind tunnel heat exchangers
摘要
Abstract
In order to study the impact of the Reynold number on the performance of wind tunnel heat exchangers,the CFD numerical simulation method was employed to analyze a conventional finned-type heat exchanger in a wind tunnel.Firstly,a three-dimensional geometric model of the finned-type heat exchanger was created through NX12.0,and then the mesh was generated through Ansys-Meshing.Numerical simulations were carried out using Fluent 2021R1.The numerical simulation mainly focused on the impact of the incoming flow Reynolds number on the heat transfer performance and resistance performance of the heat exchanger.The calculations revealed that corresponding to 2mm,4mm,and 6mm,the Reynolds numbers are 676.79,1 353.59,and 2 030.39 respectively.As the Reynolds number increases,the pressure drops and temperature difference between the inlet and outlet of the heat exchanger decreases,and the comprehensive heat transfer performance increases by 72.61%and 28.28%respectively.However,the improvement effect tends to be flat.Under identical structural parameters,as the inlet wind velocity increases,the corresponding Reynolds numbers are 1 355.09,2 710.18,4 065.27,5 420.354,and 6 775.44 respectively.As the Reynolds number increases,the heat transfer factor decreases,and the heat transfer characteristics of the wind tunnel heat exchanger show a downward trend.Meanwhile,the friction factor also decreases,leading to a downward trend in the flow resistance of the wind tunnel heat exchanger.The comprehensive heat transfer factor decreases,which decreases by 9.34%,8.96%,4.79%,and 5.34%respectively.Consequently,the comprehensive performance of the heat exchanger demonstrates progressive deterioration.关键词
翅片式换热器/雷诺数/综合换热性能/数值模拟/性能计算Key words
finned-type heat exchanger/Reynolds number/comprehensive heat transfer performance/numerical simulation/performance calculation分类
能源科技引用本文复制引用
吴星慧,李国文,肖敬航,王梓瑞..雷诺数对风洞换热器性能的影响[J].沈阳航空航天大学学报,2025,42(4):15-22,8.基金项目
国家自然科学基金(项目编号:52376028). （项目编号:52376028）
