GIEC OpenIR  > 中国科学院广州能源研究所
Experimental and numerical investigation of convective heat transfer and fluid flow in twisted spiral tube
Tang, Xinyi1; Dai, Xianfeng2; Zhu, Dongsheng3
2015-11-01
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume90Pages:523-541
AbstractTurbulent flow characteristics and heat transfer performances of twisted tri-lobed tube (TIT) and twisted oval tube (TOT) with Reynolds number of 8000-21,000 are experimentally compared in this research work, indicating that ITT provides better heat transfer performance and higher friction factor than TOT. Furthermore, numerical investigation of the influence of different geometrical parameters on heat transfer performance and flow characteristics for different twisted spiral tubes using computation fluid dynamics with a validated SST k-omega turbulence model is conducted. These geometrical parameters include different cross section shapes, twisted pitches, twisted direction and lobed numbers. The numerical result reveals that the tubes with larger diameters of out-scribed circle (D-2) offer higher Nusselt number and friction factor. It is noted that the heat transfer performance and friction factor increase with the reduction of twisted pitch length P. It is also found that twisted tube with right-left hand rotation shows better heat transfer performance than the tube with right hand rotation. In order to understand the heat transfer mechanism of the TTTs, streamlines, velocity and temperature distributions are also given. From the analysis it can be concluded that the heat transfer enhancement of ITTs is attributed to the helical flow and secondary flow induced by twisted curved tube wall. Radial velocity and tangential velocity are generated by centrifugal forces, leading to higher temperature gradients near the wall of lobed region inside twisted tube. Then the field synergy degree between velocity vector and temperature gradient is improved and the heat transfer is enhanced. (C) 2015 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordTwisted Tube Swirl Flow Heat Transfer Enhancement Cfd
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.ijheatmasstransfer.2015.06.068
WOS Subject ExtendedThermodynamics ; Engineering ; Mechanics
WOS KeywordTRANSFER ENHANCEMENT ; TAPE
Indexed BySCI
Language英语
WOS SubjectThermodynamics ; Engineering, Mechanical ; Mechanics
WOS IDWOS:000365361400053
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10917
Collection中国科学院广州能源研究所
Affiliation1.Guangdong Pharmaceut Univ, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China
2.Guangdong Vocat Coll Environm Protect Engn, Dept Environm Monitoring, Foshan 528216, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Tang, Xinyi,Dai, Xianfeng,Zhu, Dongsheng. Experimental and numerical investigation of convective heat transfer and fluid flow in twisted spiral tube[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2015,90:523-541.
APA Tang, Xinyi,Dai, Xianfeng,&Zhu, Dongsheng.(2015).Experimental and numerical investigation of convective heat transfer and fluid flow in twisted spiral tube.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,90,523-541.
MLA Tang, Xinyi,et al."Experimental and numerical investigation of convective heat transfer and fluid flow in twisted spiral tube".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 90(2015):523-541.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tang, Xinyi]'s Articles
[Dai, Xianfeng]'s Articles
[Zhu, Dongsheng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tang, Xinyi]'s Articles
[Dai, Xianfeng]'s Articles
[Zhu, Dongsheng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tang, Xinyi]'s Articles
[Dai, Xianfeng]'s Articles
[Zhu, Dongsheng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.