Heat transfer and friction characteristics of fully developed gas flow in cross-corrugated tubes
Publication date
2017-01
Document type
Research article
Author
Organisational unit
Scopus ID
Publisher
Elsevier
Series or journal
International journal of heat and mass transfer
ISSN
Periodical volume
107
First page
1076
Last page
1084
Peer-reviewed
✅
Part of the university bibliography
✅
Language
English
Abstract
© 2016 Elsevier Ltd This experimental study is concerned with gas–liquid heat exchangers relying on cross-corrugated tubes. The experiments are carried out with air flow on the inner side of the tube, cooled by a secondary outer water flow. Overall 18 different geometrical configurations are investigated. In contrast to Harleß et al. (2016) the emphasis of the present investigation is put on the cross-corrugated variant. The dimensionless corrugation pitch p/divaries between 0.283 and 1.117, the dimensionless corrugation height e/dibetween 0.024 and 0.087, and the corrugation angle φ between 14.7° and 48.8°. The examined Reynolds number range is 5000<Re<23,000, to match a typical range of gas–liquid heat exchangers. Nusselt number and friction factor are plotted for all tubes and are correlated with a power law of the corrugation dimensions. Finally, the thermal performance of the tubes is investigated in terms of the R3 criterion. Within this study the highest thermal performance is obtained by a cross-corrugated tube with p/di=0.769 and e/di=0.081.
Cite as
Enthalten in: International journal of heat and mass transfer. - Amsterdam [u.a.] : Elsevier, 1960 . - Bd. 107.2017, Seite 1076-1084
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