平直翅片管与波浪翅片管流动换热性能比较  

Flow and Heat Transfer Characteristics Comparison Between Flat Wave-Fin Tube and Corrugated-Fin Flat Tube

作　　者：张璟[1,2] 李宴君[1] 温娟[1] 唐大伟[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]北京石油化工学院机械工程学院,北京102617

出　　处：《工程热物理学报》2011年第8期1368-1370,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划资助(No.2009CB219804)

摘　　要：扁管外焊蛇形平直翅片是直接空冷凝汽器翅片管的一种常见形式,为进一步提高空冷凝汽器的冷凝效率,建立了波浪翅片扁管的三维物理数学模型。通过数值模拟,获得了不同空气入口流速下,波浪翅片扁管和平直翅片扁管外冷却空气的流场和温度场,通过对流换热系数和流动损失的对比分析表明,波浪翅片扁管在空气侧换热系数和流动损失方面比平直翅片扁管有一定的优势,在低风速的工况下,优势较为明显。The flat wave-fin tube condenser is well applied in direct-cooled power plants, In order to further enhance the condensing efficiency of air cooled condensers, a three dimensional physicomathematical model of a corrugated-fin tube has been established. The air flow and temperature fields outside the fiat wave-fin tube and corrugated-fin tube were numerically simulated at different inlet air velocities. Through comparison of the convection heat transfer coefficient and the flow loss etc., it shows that the corrugated-fin flat tube boast certain superiority in aspects of the heat transfer coefficient and the flow loss to the air side as compared with that of the flat wave-fin tube. In the case of low inlet air velocity, the advantage was more obvious.

关 键 词：直接空冷凝汽器 扁管 翅片 数值模拟 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]