螺旋折流板换热器换热强化的数值研究

文键 1; 杨辉著 1; 杜冬冬 1; 薛玉兰 1; 王萌萌 2; 王斯民 2

doi:10.7652/xjtuxb201409008

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螺旋折流板换热器换热强化的数值研究

更新时间：2025-07-09

- 螺旋折流板换热器换热强化的数值研究
- Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles
- 西安交通大学学报 2014年48卷第9期页码：43-48
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2014-01-08。作者简介: 文键(1976-),女,副教授。基金项目: 国家自然科学基金资助项目(51106119,81100707);教育部高等学校博士学科点专项科研基金资助项目(20110201120052);“十二五”国家科技支撑计划资助项目(2012BAA08B03);教育部留学回国基金资助项目;中央高校基本科研业务费专项资金资助项目
- DOI：10.7652/xjtuxb201409008
  中图分类号： TK124
- 网络首发：2014-09-10，
  
  纸质出版：2014
- 稿件说明：
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文键 1, 杨辉著 1, 杜冬冬 1, 等. 螺旋折流板换热器换热强化的数值研究[J]. 西安交通大学学报, 2014,48(9):43-48.

Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles[J]. 2014, 48(9): 43-48.
文键 1, 杨辉著 1, 杜冬冬 1, 等. 螺旋折流板换热器换热强化的数值研究[J]. 西安交通大学学报, 2014,48(9):43-48. DOI： 10.7652/xjtuxb201409008.

Numerical Simulation for Heat Transfer Enhancement of a Heat Exchanger with Helical Baffles[J]. 2014, 48(9): 43-48. DOI： 10.7652/xjtuxb201409008.

摘要

针对目前常用螺旋折流板换热器壳程的一个螺距主要采用4块折流板结构而严重影响换热器性能的问题

提出了一种旋梯式折面折流板新结构

用来封闭原始折流板之间的三角漏流区

使壳程流体接近连续的螺旋状流动。模拟结果表明:采用旋梯式折面折流板代替原始的扇形折流板后

换热器壳程流体的切向和径向速度大幅提升

轴向速度略有降低; 换热器总传热系数增加51.7%～66.1%

壳程压降增加159.8%～186.2%

换热器的热性能因子提高了10.4%～17.0%

平均增加14.1%。采用旋梯式折面折流板能有效提高螺旋折流板的换热性能

且具有定位和安装简单、方便等优点

对于换热器的节能优化设计具有重要的指导意义。

Abstract

Four plain baffles are currently used to form a helical pitch in helical baffle heat exchangers

which degrades heat transfer performance of heat exchanger obviously. A new structure of ladder-type fold baffle is proposed to block the triangular leakage zones between two adjacent plain baffles

which forces the shell-side fluid to move in an approximately continuous spiral flow. Numerical simulation results show that there is a significant increase in tangential and radial velocity of the shell-side fluid

but the axial velocity is slightly lower in the improved heat exchanger with ladder-type fold baffles. The overall heat transfer coefficient of the improved heat exchanger increases by 51.7%-66.1% and the shell-side pressure drop increases by 159.8%-186.2%. The thermal performance factor TEF enhances by 10.4%-17.0%

with an average increase of 14.1%. The ladder-type fold baffles can effectively improve the heat transfer performance of helical baffle heat exchangers

and are convenient to locate and install.

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Keywords

references

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