FRICTION AND HEAT TRANSFER CHARACTERISTICS OF TRANSVERSE TUBE WITH LARGE ROUGHNESS

YANG Dong; CHEN Tingkuan; LUO Yushan; TANG Min; YAO Jianan

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FRICTION AND HEAT TRANSFER CHARACTERISTICS OF TRANSVERSE TUBE WITH LARGE ROUGHNESS

更新时间：2025-12-10

- FRICTION AND HEAT TRANSFER CHARACTERISTICS OF TRANSVERSE TUBE WITH LARGE ROUGHNESS
- CIESC Journal Issue 5, (2002)
- 作者机构：
  
  西安交通大学多相流国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 May 2002，
  
  Published：25 May 2002
- 稿件说明：
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YANG Dong, CHEN Tingkuan, LUO Yushan, et al. FRICTION AND HEAT TRANSFER CHARACTERISTICS OF TRANSVERSE TUBE WITH LARGE ROUGHNESS[J]. CIESC Journal, 2002, (5).
DOI：

YANG Dong, CHEN Tingkuan, LUO Yushan, et al. FRICTION AND HEAT TRANSFER CHARACTERISTICS OF TRANSVERSE TUBE WITH LARGE ROUGHNESS[J]. CIESC Journal, 2002, (5). DOI：

摘要

在凝结换热实验台上

采用恒壁温法和恒热流法对油品在大粗糙度横肋管中的层流与湍流摩擦阻力与传热特性进行了实验研究 .实验过程中Re为 5 0～ 6 2 0 0

Pr为 75～ 2 6 0

管子粗糙高度为 5mm

导程为 30mm .实验结果表明

由于实验管特殊几何结构 (大粗糙度 )和油品物性参数的相互作用

使其表现出与以水或空气为工质的常用强化管不同的流动传热规律

并且实验方法对实验结果的影响不大 .根据实验结果

提出了层流区和湍流区油品量纲 1摩擦系数及传热系数的关联式

并将实验数据与Ravigururajan和Bergles关联式的计算值进行了比较 .研究结果可用于大粗糙度横肋管换热器的设计及运行参数优化 .

Abstract

Investigations were carried out

under uniform wall temperature and constant heat flux boundary conditions

on heat transfer and frictional characteristics of transverse tube with large roughness for laminar and turbulent flow of oil in a condensation test facility.The parameters tested were Re =50-6200

Pr =75-260

roughness height e =5mm

and pitch p =30mm.The experimental results show that the frictional and heat transfer characteristics of test tube differed greatly with those of conventional enhanced tubes

which use water or air as working fluid

due to the interaction of its special geometrical configurations and oil thermal properties.Also

the difference in friction and heat transfer data by using different test methods was found to be extremely small.The correlations of dimensionless friction factors and heat transfer coefficients were proposed on the basis of experimental data.Finally the experimental data were compared with computational results obtained by Ravigururajan and Bergles correlation.

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