Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles

doi:10.7652/xjtuxb201411002

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Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles

更新时间：2025-07-09

- Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles
- Vol. 48, Issue 11, Pages: 8-14(2014)
- 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：
- DOI：10.7652/xjtuxb201411002
  CLC： TK124
- Online First：10 November 2014，
  
  Published：2014
- 稿件说明：
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Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles[J]. 2014, 48(11): 8-14.
DOI：

Numerical Simulation for Configuration Optimization of Heat Exchanger with Helical Baffles[J]. 2014, 48(11): 8-14. DOI： 10.7652/xjtuxb201411002.

摘要

针对现有螺旋折流板换热器在相邻两块折流板的直边对接处形成三角区漏流而降低换热器换热性能的问题

提出了一种旋梯式螺旋折流板换热器

即旋梯式折面折流板由一块大平板经过两次弯折后形成

其中两平面与管束轴线垂直

另一平面与两平面的夹角(折弯角)相同。对旋梯式螺旋折流板换热器的结构进行了计算流体力学模拟优化

结果表明:利用折面板结构及直边重叠特点

消除了三角区漏流

改善了壳程流场

使得换热器壳程流体流动更接近于螺旋流

换热得以强化; 折弯度为0.3、切割百分数为90%、折弯角为37°时

旋梯式螺旋折流板换热器综合性能最优

换热器热性能因子提高了28.4%～30.7%

平均增加了29.9%。该结果可为螺旋折流板换热器的节能优化提供参考。

Abstract

An improved structure of heat exchangers with ladder-type fold baffle is proposed to eliminate the triangular leakage zones between two adjacent baffles of conventional heat exchangers with helical baffle. The improved ladder-type fold baffle is formed by folding one plane twice

which consists of three planes

two of which are perpendicular to the tube bundle axis

and the third plane keeps the same angle with the other two planes. The configuration of the ladder-type fold baffle is optimized with CFD simulation. The results show that the triangular leakage zones are eliminated due to the folded plane structure and the overlap between two adjacent straight edges of ladder-type fold baffles. The shell-side flow field is improved significantly

which forms a continuous spiral flow in shell side of the improved heat exchanger

hence heat transfer in the heat exchanger is strengthened. When the bend degree is taken as 0.3

the cutting percentage as 90% and the bend angle as 37°

the overall performance of heat exchanger reaches the best. The thermal performance factor rises by 28.4%-30.7%

or 29.9% on an average.

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references

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曹春暖. 高效螺旋折面板换热器数值模拟研究[D]. 西安: 西安交通大学, 2013.

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ZHANG Jianfei, HE Haling, TAO Wenquan. 3D numerical simulation on shell-and-tube heat exchangers with middle-overlapped helical baffles and continuous baffles: part Ⅱ Simulation results of periodic model and comparison between continuous and noncontinuous helical baffles[J]. International Journal of Heat and Mass Transfer, 2009, 52(23/24): 5381-8389.

王斯民, 文键. 无短路区新型螺旋折流板换热器换热性能的实验研究[J]. 西安交通大学报, 2012, 46(9): 12-15.

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PROMVONGE P, KOOLNAPADOL N, PIMSARN M, et al. Thermal performance enhancement in a heat exchanger tube fitted with inclined vortex rings[J]. Appl Therm Eng, 2014, 62(1): 285-292.

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