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山东大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (6): 90-94.doi: 10.6040/j.issn.1672-3961.0.2014.125

• 能源与动力工程 • 上一篇    

H型翅片管束空气流动及换热特性

吴艳艳, 孙奉仲, 李飞, 陈昌贤   

  1. 山东大学能源与动力工程学院, 山东 济南 250061
  • 收稿日期:2014-05-04 修回日期:2014-09-30 发布日期:2014-05-04
  • 通讯作者: 孙奉仲(1962-),男,山东郓城人,教授,博士生导师,主要研究方向为电站热力设备节能与经济性控制.E-mail:sfzh@sdu.edu.cn E-mail:sfzh@sdu.edu.cn
  • 作者简介:吴艳艳(1992-),女,山东济南人,研士研究生,主要研究方向为电站热力设备节能与经济性控制.E-mail:1041018085@qq.com

Numerical study on the air motion of H-type finned tubes and heat transfer characteristics

WU Yanyan, SUN Fengzhong, LI Fei, CHEN Changxian   

  1. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
  • Received:2014-05-04 Revised:2014-09-30 Published:2014-05-04

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摘要： 为了对不同排列方式的H型翅片管进行数值分析,建立不同布置方式下H型翅片管束流动及换热数值模型,获得两种典型布置下的流动及传热特性变化规律。结果表明,H型翅片特殊沟槽结构使背风侧形成纵向冲刷流场,存在明显的三维流动特征,使得其具有自清理、不易积灰的功能;错排翅片基管传热系数大于等间距排列的基管,并且随速度增大,换热效果差异越明显;管束行距对翅片管传热系数的影响明显大于列距的影响,管束行距增大,引起流道内空气平均速度下降,传热系数降低,流道损失减小。

关键词: 列距, 阻力特性, 传热特性, 行距, H型翅片管

Abstract: In order to analyze H-type finned tubes in different arrangement modes numerically, flow and heat transfer numerical models of H-type finned tubes in different arrangement forms were established. The change rules of flow and heat transfer characteristics of two typical arrangements has been obtained. The result showed that the special groove structure of H-type finned tubes turned leeward side into vertical flushing flow field with obvious three-dimensional flow characteristics which had the functions of automatic cleaning and nearly gathering no dust. The heat transfer coefficient of staggered finned parent tubes was higher than that of the parent tubes arranged in equal interval. Additionally, the difference of heat transfer effect was increasingly obvious with the increase of speed. The influence of array pitch of tubes on the heat transfer coefficient of finned tubes was remarkably greater than that of row pitch. The increase of the array pitch of tubes lowered the average speed of air in flow channel, heat transfer coefficient and the loss of flow channel.

Key words: heat-transfer characteristic, array pitch, resistance characteristic, row pitch, H-type finned tube

中图分类号: 

  • TK222
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