带有平直-矩形内翅片管的流动与传热特性  

Flow and heat transfer performances of tubes with internal longitudinal plat-rectangle fins

作　　者：柳林[1] 凌祥[1] 彭浩[1] 

机构地区：[1]南京工业大学机械与动力工程学院江苏省过程强化与新能源装备技术重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2013年第2期21-29,共9页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省普通高校研究生科研创新计划(CX10B_165Z);江苏省普通高校研究成果产业化推进项目(JH10-18)

摘　　要：利用三维模拟计算与试验的方法研究应用于废气再循环(EGR)冷却器的带有平直-矩形内翅片管的流动与传热特性,以及内翅片的迎风距离对管侧传热的影响。研究表明:这种新型的内翅片管能够显著地强化传热;数值模拟计算获得的管侧压降.摩擦因子和努塞尔数与试验方法得到的数据相比,最大偏差分别是6.7%、6.5%和5.9%;内翅片的迎风距离越大,传热性能越好。Flow and heat transfer performances of the tubes with internal longitudinal plat-rectangle fins in exhaust gas recirculation （EGR） cooler were investigated by three-dimensional computation and experi- ment. The effects of the upward wind distance of the internal fins on tube-side heat transfer performances were examined by a numerical method. The research results showed that the novel internally finned tube could enhance heat transfer characteristics, the maximum deviations between numerical results and the experimental data were approximately 6.7% for pressure drop, 6.5% for friction factor and 5.9% for Nusselt number, and the longer the upward wind distance, the better the hear performances.

关 键 词：内翅片管 平直-矩形翅片 传热性能 EGR冷却器 努塞尔数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]