Heat transfer enhancement with helical fins and vortex generators on shells at different curvatures

ZHANG Li; XIE Caipeng; LI Yaxia; WU Jianhua

doi:10.3969/j.issn.0438-1157.2013.09.017

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Heat transfer enhancement with helical fins and vortex generators on shells at different curvatures

更新时间：2025-12-10

- Heat transfer enhancement with helical fins and vortex generators on shells at different curvatures
- CIESC Journal Issue 9, Pages: 3198-3205(2013)
- 作者机构：
  
  1. 沈阳化工大学化学工程学院,辽宁,沈阳,110142
  2. 沈阳化工大学能源与动力工程学院,辽宁,沈阳,110142
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.09.017
  CLC： K124
- Online First：05 September 2013，
  
  Published：05 September 2013
- 稿件说明：
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ZHANG Li, XIE Caipeng, LI Yaxia, et al. Heat transfer enhancement with helical fins and vortex generators on shells at different curvatures[J]. CIESC Journal, 2013, (9): 3198-3205.
DOI：

ZHANG Li, XIE Caipeng, LI Yaxia, et al. Heat transfer enhancement with helical fins and vortex generators on shells at different curvatures[J]. CIESC Journal, 2013, (9): 3198-3205. DOI： 10.3969/j.issn.0438-1157.2013.09.017.

摘要

为考察涡发生器与螺旋片对不同曲率的套管式换热器壳侧的传热强化效果

在不同中径的壳侧安装了相同密度的螺旋片和三角翼型涡发生器。以空气为介质

在Re=680～16000范围内

采用实验和数值模拟方法研究了壳侧的传热和阻力特性

考察了不同曲率下复合强化的壳侧的综合性能

分析了传热强化机理。结果表明

曲率越大

壳侧传热系数越高

摩擦因数越大。对曲率分别为0.131、0.321和0.440的3种换热器壳侧

涡发生器将其传热系数平均提高了31.52%、20.83%和18.33%。小曲率和复合强化的壳侧综合性能更好。涡发生器改变了换热器壳侧的流场结构

提高了速度场和温度场之间的协同性

从而提高了换热器壳侧的传热效果。

Abstract

To examine the heat transfer performance of compound enhancement with helical fins and vortex generators for the shell of double-pipe heat exchangers at different curvatures

helical fins and delta-winglet-pair vortex generators are installed on the shell side with different middle diameters at the same pitch.Heat transfer and pressure drop characteristics on the shell side are investigated experimentally and numerically at Re=680—16000 with air as working fluid.The comprehensive performance on the shell side is enhanced and the enhancement mechanism is analyzed.The results show that larger curvature of the shell leads higher heat transfer coefficient and friction factor.For curvatures of 0.131

0.321 and 0.440

heat transfer coefficient is increased by 31.52%

20.83% and 18.33%

respectively

with vortex generators. Vortex generators can change the fluid flow structure and improve the synergy of velocity field and temperature field

so the heat transfer on the shell side is improved.

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