摘要
扭曲椭圆管因结构简单、强化传热及阻垢性能优异,近年来成为被动强化传热领域研究热点之一。虽已有文献对扭曲椭圆管换热器技术进行了综述,但对扭曲椭圆管强化传热特性的归纳和工程应用研究脉络的梳理存在不足,本工作着眼于扭曲椭圆管内外传热及流阻性能研究、扭曲椭圆管换热器研发和工程应用两方面内容,概括了扭曲椭圆管(束)结构、工质、流动状态对传热性能及流阻特性的影响规律;回顾了扭曲椭圆管换热器工程应用案例,总结了有关扭曲椭圆管研究尚待完善之处,并对扭曲椭圆管强化传热研究的发展趋势进行展望,为深化扭曲椭圆管理论研究和工程实践提供指导和参考。要点:(1)概述了扭曲椭圆管内外传热、流阻及阻垢特性研究进展。(2)回顾了扭曲椭圆管换热器工程应用案例。(3)指出了扭曲椭圆管强化传热研究中存在的问题,并对其未来研究方向进行展望。
The twisted oval tube has simple structure,excellent heat transfer enhancement and anti-fouling performance,and has become one of the research hotspots in the field of passive heat transfer enhancement.In recent years,researchers have carried out a lot of research on the heat transfer performance of twisted elliptical tubes(bundles)through experiments and numerical simulations.The mechanism of heat transfer enhancement is explained.Although there are reviews on the technology of twisted oval tube exchangers,there are deficiencies in the induction of the heat transfer enhancement characteristics of twisted oval tubes and the analysis of the research clues of the engineering application.This review focuses on the internal and external heat transfer and flow resistance performance of the twisted oval tube,and summarizes the influence of the structure of the twisted oval tube(bundle),working fluid and flow state on the heat transfer performance and flow resistance characteristics.The review also reviews the engineering application cases of twisted oval tube heat exchangers,and outlines the contents to be perfected in the researches on twisted oval tubes,and prospects the development trend of the research on heat transfer intensification of twisted oval tubes.This review is expected to provide guidance and reference for deepening the theoretical research and engineering practice of twisted oval tubes.Key learning points:(1)The research progress of heat transfer,flow resistance and anti-scaling characteristics inside and outside twisted oval tubes was summarized.(2)The engineering application cases of twisted oval tube heat exchangers were reviewed.(3)The existing problems in the field of heat transfer enhancement by twisted oval tubes and the future research direction were pointed out.
作者
李修真
谈莹莹
袁俊飞
王占伟
王林
Xiuzhen LI;Yingying TAN;Junfei YUAN;Zhanwei WANG;Lin WANG(Institute of Building Energy and Thermal Science,Henan University of Science and Technology,Luoyang,Henan 471023,China;CAS Key Laboratory of Renewable Energy,Guangzhou,Guangdong 510640,China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2022年第5期561-572,共12页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:51876055,51706061)
中国科学院可再生能源重点实验室开放基金项目(编号:E029kf0401)。
关键词
扭曲椭圆管
强化传热
流动特性
二次流
关联式
twisted oval tube
heat transfer enhancement
flow characteristics
secondary flow
correlation
