Effect of Shape and Placement of Twisted Pin Fins in a Rectangular Channel on Thermo-Hydraulic Performance

作     者：LI Yong ZHANG Jin ZHANG Yingchun ZHANG Jiajie MA Suxia SUNDEN Bengt XIE Gongnan 

作者机构：College of Electrical and Power EngineeringTaiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Cleaner Intelligent Control on Coal&ElectricityMinistry of EducationTaiyuan 030024China Shanxi Provincial Key Laboratory of High Efficiency Heat Storage and Low Carbon Heat SupplyTaiyuan 030008China School of Energy and Power EngineeringNorth University of ChinaTaiyuan 030051China Department of Energy SciencesLund UniversityP.0.Box 118Lund SE 22100Sweden School of Marine Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710072China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2024年第33卷第5期

页      面：1773-1793页

核心收录：

学科分类：07[理学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：sponsored by the China Postdoctoral Science Foundation(2023M732569) the Fundamental Research Program of Shanxi Province,China(202203021212263) Shanxi Scholarship Council of China(2023-055,2023-143) Chunhui Project Foundation of the Education Department of China(202200075) Science and Technology Innovation Project of Colleges and Universities in Shanxi Province(2022L061) financially supported by the Shanxi Provincial Key Laboratory ofHigh Efficiency Heat Storage and Low Carbon Heat Supply,Taiyuan Boiler Group Co.,Ltd 

主　　题：twisted pin fin cross arrangement heat transfer pressure drop HTPF 

摘      要：To enhance the thermo-hydraulic performance of cooling channels,this investigation examines the influence of distinct cross-sectional shapes(i.e.,triangular,rectangular,and hexagonal)of twisted pin fins and their arrangements in straight and cross *** ambient air cooling test platform was established to numerically and experimentally investigate the flow and heat transfer characteristics of 360°twisted pin fins at Re=*** findings reveal that straight rows exhibit higher Nu values than cross rows for triangular and rectangular twisted pin fins,and Nu increases with *** contrast,for hexagonal twisted pin fins,only straight rows at Re=19000 exhibit superior overall thermal performance compared to cross ***,the heat transfer performance of the cooling channel with hexagonal twisted fins surpasses both triangular and rectangular configurations,especially at high Reynolds numbers(Re=22800).Although the heat transfer coefficient of the cooling channel with hexagonal twisted fins is significantly enhanced by 132.71%compared to the flat channel,it also exhibits the highest thermal resistance and relative friction among the three types of twisted fins,the maximum of which are 2.14 and ***,the hydrothermal performance factor(HTPF)of the cooling channels with different types of twisted pin fins depends on the Reynolds number and arrangement *** Re=15200,the highest HTPF achieved for the cross-row hexagonal twisted pin fins is 0.99.