Effects of tube bundle structure on heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers

YANG Tao; YUAN Yichao

doi:10.11949/j.issn.0438-1157.20170877

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Effects of tube bundle structure on heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers

更新时间：2025-12-10

- Effects of tube bundle structure on heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers
- CIESC Journal Issue 4, Pages: 1365-1373(2018)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170877
  CLC： K223
- Online First：05 April 2018，
  
  Published：05 April 2018
- 稿件说明：
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YANG Tao, YUAN Yichao. Effects of tube bundle structure on heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers[J]. CIESC Journal, 2018, (4): 1365-1373.
DOI：

YANG Tao, YUAN Yichao. Effects of tube bundle structure on heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers[J]. CIESC Journal, 2018, (4): 1365-1373. DOI： 10.11949/j.issn.0438-1157.20170877.

摘要

在模化试验验证的基础上，对不同横向管间距S1、纵向管间距S2和椭圆管长短轴比a/b的开缝翅片椭圆管换热器进行了数值模拟，分析了管束结构的差异对开缝翅片椭圆管换热器性能的影响。结果表明：横向管间距在60.55～70.55 mm范围内，空气侧Nu和Eu均随S1减小而增大，S1为60.55 mm时换热器综合流动传热性能最好；纵向管间距在65～75 mm范围内，空气侧Nu随S2减小而增大，Eu变化不明显，S2为65 mm时换热器综合流动传热性能最好；横向管间距对开缝翅片椭圆管换热器传热、流动性能的影响较纵向管间距更为明显；在等周长条件下，椭圆管长短轴比a/b在1.5～2.5范围内，a/b为1.8时换热器综合流动传热性能最好。研究成果可为此类换热器在工程实际中的应用与进一步优化提供依据。

Abstract

Numerical simulation on slit finned elliptical tube heat exchangers with different transverse tube pitch S1

longitudinal tube pitch S2 and the ratio a/b of major and minor axis of the elliptical tube

was verified by model experiment. The effect of tube bundle structure on the heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers was analyzed. The results indicate that as S1 decreases from 70.55 mm to 60.55 mm

Nu and Eu at air-side increase

with optimized comprehensive flow and heat transfer performance of the heat exchangers when S1 equals to 60.55 mm. As S2 decreases from 75 mm to 65 mm

Nu at air-side increases

but Eu at air-side has no significant changes

with optimized comprehensive flow and heat transfer performance of the heat exchangers when S2 equals to 65 mm. The heat transfer and resistance characteristics of slit finned elliptical tube heat exchangers are significantly influenced by the transverse tube pitch. When the elliptical tube circumference is equal and a/b is between 1.5 and 2.5

the optimized comprehensive flow and heat transfer performance of the heat exchangers was the best when a/b was 1.8. The findings of this paper provide proofs of the application and further optimization of such heat exchangers in engineering practice.

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