空冷散热器开缝翅片管束外空气流动传热特性研究.pdf

山东农业大学学报( 自然科学版),20 16,47(3):452-455 VOL.47 NO.3 20 16 Journal of Shandong Agricultural University ( Natural Science Edition ) doi:10.3969/j .issn.1000-2324.20 16.03.025 空冷散热器开缝翅片管束外空气流动传热特性研究 1,2 1 1 张 薇 ,杜小泽 ,杨立军 1. 华北电力大学电站设备状态监测与控制教育部重点实验室, 北京 102206 2. 华北水利水电大学环境与市政工程学院, 河南 郑州 45000 1 摘 要: 在传统平直翅片上表面上开孔、开缝是有效强化翅片管空气侧传热的方法。通过对典型空冷翅片管束的流动 传热性能进行数值模拟得到开缝翅片管束的流动阻力和传热系数随迎面风速变化规律，拟合得到了流动摩擦因子和 努谢尔特数随雷诺数的无因次关系式。结果表明：随着迎面风速加大，空气会对换热阻力产生不同程度的影响，但 换热性能的增加幅度高于压降的增加幅度。模拟结果与试验结果吻合较好。 关键词: 空冷散热器; 开缝翅片管; 流动传热性能 中图法分类号:TK124;TM62 1 文献标识码:A 文章编号:1000-2324(20 16)03-0452-04 Study on Characteristics of Flow Heat Conduction outside the PipeBundleofAir-cooledRadiatorwithSlottedFins 1,2 1 1 ZHANG Wei , DU Xiao-ze , YANG Li-jun 1. Key Laboratory of ConditionMonitoring and ControlforPowerPlantEquipment,Ministry of Education/North China ElectricPower University,Beijing 102206, China 2. Schoolof Environmental andMunicipalEngineering/North China University of Water Conservancy andHydroelectric Power,Zhengzhou4500 11, China Abstract:It is an effective way to slot or punch on a plain fin surface for improving heat conduction performance. This paper obtained the variation laws of resistance and heat conduction coefficient with the frontal velocity outside a pipe bundle of a radiator with slotted fins from the numerical simulation for flow heat conduction characteristics of typical air-cooled pipe bundle and got a no-causal fitting relationship expression between the friction factor and Nusselt number versus Reynolds number. The results showed that air could make the effect on heat exchange resistance with the increase of the frontal