横排锯齿翅片冷凝传热数值分析  

Numerical Analysis of Condensation Heat Transfer of Transverse Direction Type Serrated Fin

作　　者：杨春艳 李娟[1] 唐明 YANG Chunyan;Li Juan;Tang Ming

机构地区：[1]南京林业大学机械电子工程学院

出　　处：《化工装备技术》2019年第5期6-9,共4页Chemical Equipment Technology

基　　金：江苏省大学生创新计划(201510298019Z)

摘　　要：以水蒸气为介质对单层横排锯齿翅片通道进行了数值模拟,通过研究流道内介质的速度、温度和气液相分布情况,分析了横排锯齿翅片的强化冷凝传热机理.结果表明,温度在高度方向呈对称分布,且越靠近进口,介质降温速度越快;流道截面形状不断变化,增加了流体的湍动程度,打断了边界层的发展,有效强化了传热效果;冷凝水主要集中在通道后半段翅片间隔处,速度变化对气液相的分布情况有很大影响.Using water vapor as medium, the numerical simulation of single-layer transverse direction type serrated fin passage was carried out. The condensing heat transfer mechanism of transverse direction type serrated fin was analyzed by studying the velocity, temperature and gas-liquid phase distribution in the flow channel. The results showed that the temperature distribution was symmetrical in the direction of altitude, and the closer to the inlet, the faster the cooling rate of the medium was. The shape of the cross section of the runner changed constantly, which increased the turbulence of the fluid, interrupted the development of the boundary layer and effectively strengthened the heat transfer effect. The condensate water mainly concentrated at the interval between the fins in the latter half of the channel, and the variation of velocity had a great influence on the distribution of gas and liquid phases.

关 键 词：横排锯齿翅片 强化传热 数值模拟 两相流 

分 类 号：TK124[动力工程及工程热物理—工程热物理]