Influence of interrupted holes and fin pitch on flow and heat transfer of wavy-finned tubes in direct air-cooled condensers

HE Xiaoyi; YIN Jixiang; WANG Tao; MA Suxia

doi:10.19666/j.rlfd.201805152

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Influence of interrupted holes and fin pitch on flow and heat transfer of wavy-finned tubes in direct air-cooled condensers

更新时间：2025-09-28

- Influence of interrupted holes and fin pitch on flow and heat transfer of wavy-finned tubes in direct air-cooled condensers
- Thermal Power Generation Vol. 48, Issue 2, Pages: 72-77(2019)
- 作者机构：
  
  太原理工大学电气与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201805152
  CLC： K26
- Published Online：30 January 2019，
  
  Published：2019
- 稿件说明：
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HE Xiaoyi, YIN Jixiang, WANG Tao, et al. Influence of interrupted holes and fin pitch on flow and heat transfer of wavy-finned tubes in direct air-cooled condensers[J]. Thermal power generation, 2019, 48(2): 72-77.
DOI：

HE Xiaoyi, YIN Jixiang, WANG Tao, et al. Influence of interrupted holes and fin pitch on flow and heat transfer of wavy-finned tubes in direct air-cooled condensers[J]. Thermal power generation, 2019, 48(2): 72-77. DOI： 10.19666/j.rlfd.201805152.

摘要

在传统直接空冷单排蛇形翅片扁平管上增设扰流孔以强化换热。本文应用Fluent软件对有、无扰流孔的2种蛇形翅片扁平管(蛇形翅片管)模型进行三维数值模拟

研究了1.4、2.2、3.0、3.8m/s4种迎面风速下不同翅片间距对有、无扰流孔的2种型式翅片管换热、阻力以及综合性能的影响。结果表明:与未开孔的蛇形翅片管相比

增设扰流孔的蛇形翅片管在各种翅片间距、迎面风速下使空气侧的换热系数提高1%～18%

且流动阻力略微减小;在较小的迎面风速范围内

增设扰流孔可以使相同工况下的最佳翅片间距减小。

Abstract

Interrupted holes are added to the conventional wave-fins of direct air-cooled single-row tube to enhance heat transfer. The three-dimensional numerical simulation on two kinds of finned tube models with and without interrupted holes was performed by Fluent software. The effects of fin pitch on the heat transfer

flow resistance and overall performance of the two finned tubes at four facing velocities(1.4 m/s

2.2 m/s

3.0 m/s

3.8 m/s) were studied. The results show that

compared with the wavy-finned tubes with no holes

the wavy-finned tubes with interrupted holes increase the air-side heat transfer coefficient by 1%～18% at various fin pitches and facing velocities

and the flow resistance slightly reduces. In the smaller facing velocity range

adding interrupted holes can reduce the optimal fin pitch under the same working conditions.

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