变角度翅片结构对散热器性能的影响分析
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摘要
为提升散热器的综合性能,以开窗角度为27°、翅片波距为2. 4 mm的百叶窗翅片散热器为基础,提出基于此结构改良的8种变角度翅片结构。采用Fluent软件进行数值模拟,通过对5种入口风速下8种变角度翅片结构的传热因子j与阻力因子f进行分析,探讨8种变角度翅片结构的优劣。研究表明,各变角度翅片结构均有效提升了散热器的传热性能,均对翅片的阻力性能影响较小,其中对散热器翅片综合性能提升最大的攻角渐变值Δθ=1. 2°,采用变角度翅片结构的散热器最高可提升6. 54%的传热性能,最高可增加1. 5%的散热量。
In order to improve the comprehensive performance of the radiator,based on the louver fins of the louver fin with a window angle of 27 degrees and the fin wave distance of 2. 4 mm,the structure of eight different angle fins based on this structure is proposed. Fluent is used to simulate the heat transfer factor j and resistance factor f of the eight variable angle radiator fins under five kinds of inlet conditions,and the advantages and disadvantages of the eight angle fins are discussed. The research shows that all the variable angle fins can effectively improve the heat transfer performance of the radiator,and have less influence on the resistance performance of the fin,and the maximum angle of attack of the radiator fin is 1. 2 degrees,the radiator with variable angle fins can increase the heat transfer performance by 6. 54 %,and the maximum heat dissipation can be increased by 1. 5 %.
In order to improve the comprehensive performance of the radiator,based on the louver fins of the louver fin with a window angle of 27 degrees and the fin wave distance of 2. 4 mm,the structure of eight different angle fins based on this structure is proposed. Fluent is used to simulate the heat transfer factor j and resistance factor f of the eight variable angle radiator fins under five kinds of inlet conditions,and the advantages and disadvantages of the eight angle fins are discussed. The research shows that all the variable angle fins can effectively improve the heat transfer performance of the radiator,and have less influence on the resistance performance of the fin,and the maximum angle of attack of the radiator fin is 1. 2 degrees,the radiator with variable angle fins can increase the heat transfer performance by 6. 54 %,and the maximum heat dissipation can be increased by 1. 5 %.
引文
[1]董其伍,王丹,刘敏珊.百叶窗翅片车辆散热器性能研究[J].机械设计与制造,2012(1):115-117.
[2]DAVENPORT C J.Heat Transfer and Fluid Flow in the Louvered Triangular Ducts[D].[S.l.]:Lanchester Polytechnic,1980.
[3]KIM J H,YUN J H.Heat Transfer and Friction Characteristics for the Louver Fin Heat Exchanger[J].Journal of thermophysics and heat transfer,2004,18(1):58-64.
[4]吴勇,郭健忠,胡溧,等.汽车散热器百叶窗翅片的多结构仿真与实验研究[J].科学技术与工程,2016,16(11):59-64.
[5]BEAMER.Heat exchanger cooling fin with varying louver angle:US5730214[P].1998.
[6]HSIEH C T,JANG J Y.3-D thermal-hydraulic analysis for louver fin heat exchangers with variable louver angle[J].Applied Thermal Engineering,2006(26):1629-1639.
[7]JANG J Y,CHEN C C.Optimization of louvered-fin heat exchanger with variable louver angles[J].Applied Thermal Engineering,2015(91):138-150.
[8]吴学红,张林.连续变攻角百叶窗翅片的传热及流动特性[J].工程热物理学报,2016,37(9):1935-1939.
[9]郭健忠,徐敏,张光德,等.汽车散热器的性能分析及翅片结构优化[J].科学技术与工程,2016,16(26):58-64.
[10]VERSTEEG H K,MALALASEKERA W.An Introduction to Computational Fluid Dynamics The Finite Volume Method[M].London:Pearson Education Limited,2007:24-26.
[2]DAVENPORT C J.Heat Transfer and Fluid Flow in the Louvered Triangular Ducts[D].[S.l.]:Lanchester Polytechnic,1980.
[3]KIM J H,YUN J H.Heat Transfer and Friction Characteristics for the Louver Fin Heat Exchanger[J].Journal of thermophysics and heat transfer,2004,18(1):58-64.
[4]吴勇,郭健忠,胡溧,等.汽车散热器百叶窗翅片的多结构仿真与实验研究[J].科学技术与工程,2016,16(11):59-64.
[5]BEAMER.Heat exchanger cooling fin with varying louver angle:US5730214[P].1998.
[6]HSIEH C T,JANG J Y.3-D thermal-hydraulic analysis for louver fin heat exchangers with variable louver angle[J].Applied Thermal Engineering,2006(26):1629-1639.
[7]JANG J Y,CHEN C C.Optimization of louvered-fin heat exchanger with variable louver angles[J].Applied Thermal Engineering,2015(91):138-150.
[8]吴学红,张林.连续变攻角百叶窗翅片的传热及流动特性[J].工程热物理学报,2016,37(9):1935-1939.
[9]郭健忠,徐敏,张光德,等.汽车散热器的性能分析及翅片结构优化[J].科学技术与工程,2016,16(26):58-64.
[10]VERSTEEG H K,MALALASEKERA W.An Introduction to Computational Fluid Dynamics The Finite Volume Method[M].London:Pearson Education Limited,2007:24-26.