化工学报 ›› 2016, Vol. 67 ›› Issue (11): 4615-4622.DOI: 10.11949/j.issn.0438-1157.20160756

• 流体力学与传递现象 • 上一篇    下一篇

翅片结构对双向开缝翅片管换热器性能的影响

屠琦琅, 袁益超, 胡晓红   

  1. 上海理工大学上海市动力工程多相流动与传热重点实验室, 上海 200093
  • 收稿日期:2016-05-31 修回日期:2016-07-08 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: 袁益超,ychyuan@163.com

Effects of fin structure on heat transfer and resistance characteristics of super slit finned tube heat exchangers

TU Qilang, YUAN Yichao, HU Xiaohong   

  1. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2016-05-31 Revised:2016-07-08 Online:2016-11-05 Published:2016-11-05

摘要:

为了获得翅片结构对双向开缝翅片管换热器传热与阻力性能的影响规律,对不同翅片间距Pf和开缝高度Sh的双向开缝翅片管换热器进行了数值模拟,并对数值模拟结果进行了模化试验验证。结果表明:当Re<7200时,增大Pf会提高双向开缝翅片管换热器的传热与阻力性能;当Re>7200时,减小Pf会提高其传热性能,降低其阻力性能;随着Sh的增加,双向开缝翅片管换热器的传热性能先降低后提高,阻力性能先提高后降低;对于不同翅片结构的5种双向开缝翅片管换热器,Pf越大,综合流动传热性能越高,但实际换热面积会减小,需综合考虑;在Re=2734~6712范围内数值模拟与试验结果吻合较好,数值模拟能较准确地反映双向开缝翅片管换热器的传热与阻力特性。研究成果可为双向开缝翅片管换热器的结构与性能优化提供依据。

关键词: 双向开缝翅片管换热器, 传热, 数值模拟, 模化试验, 综合流动传热性能, 优化

Abstract:

To understand the effect of fin structure on heat transfer and resistance, numerical simulation and validation experiments were performed on super slit finned tube heat exchangers with different fin pitches Pf and slit heights Sh. When Re was less than 7200, heat transfer and resistance performance was improved with Pf increase. When Re was greater than 7200, heat transfer was improved but resistance was declined with Pf decrease. In case of Sh increase, heat transfer declined first and enhanced later, whereas resistance showed an opposite trend. With regard to five super slit finned tube heat exchangers with different fin structures, the comprehensive flow and heat transfer performance were improved while the actual heat transfer area was decreased with Pf increase, which a consideration of all factors should be required. A good agreement was observed between the numerical simulation and experimental results when Re was in the range of 2734-6712, indicating that the numerical simulation method could predict the heat transfer and resistance characteristics of super slit finned tube heat exchangers. These results would set a basis for optimization between structure and performance of these heat exchangers.

Key words: super slit finned tube heat exchangers, heat transfer, numerical simulation, modeling experiment, comprehensive flow and heat transfer performance, optimization

中图分类号: