纵向涡发生器对百叶窗翅片管换热器性能的提升  

Performance Enhancement of Louvered Fin Heat Exchanger by Using Longitudinal Vortex Generator

作　　者：闫凯[1] 刘妮[1] 朱昌盛[1] 齐亚茹[1] YAN Kai;LIU Ni;ZHU Chang-sheng;QI Ya-ru(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷技术》2016年第3期19-23,共5页Chinese Journal of Refrigeration Technology

摘　　要：百叶窗和纵向涡发生器都能够较大幅度提升翅片管换热器的换热能力，同时其流动阻力也相应增大。本文利用CFD 技术对4 种不同类型的翅片管换热器（平翅片、百叶窗翅片、百叶窗加装三角翼翅片和百叶窗加装矩形翼翅片）的流动传热性能进行了三维数值模拟，得到了在不同雷诺数下各翅片管换热器的换热因子j 和摩擦因子f 以及换热器综合性能j/f。结果表明，百叶窗翅片加装纵向涡发生器后，换热管尾部滞止区尺寸明显减小，滞止区与主流区的换热得到增强，换热器综合性能得到了提升，加装三角翼其换热器综合性能提升了1.25%~2.63%，加装矩形翼其换热器综合性能提升了3.33%~4.82%。The louvered fin structure and longitudinal vortex generator can significantly enhance the heat transfer infin-and-tube heat exchanger with a corresponding increase of the flow resistance of the heat exchanger. A 3-Dnumerical simulation using computational fluid dynamics (CFD) was employed to investigate the flow and heat transfercharacteristics of four different forms (flat fin, louvered fin, louvered fin with delta winglets, louvered fin withrectangular winglets) fin-and-tube heat exchangers, and the colburn factor j, friction factor f and overall performance j/fat different Reynolds number were obtained. The results show that, the size of the wake zones is reduced and the heattransfer with main flow is enhanced because the vortex generator, and the overall performance of louvered fin withdelta winglets and rectangular winglets was increased by 1.25%~2.63% and 3.33%~4.82%, respectively.

关 键 词：翅片管换热器 数值模拟 百叶窗翅片 纵向涡发生器 

分 类 号：TK172[动力工程及工程热物理—热能工程]