Heat transfer enhancement of fin-tube heat exchangers using punched triangular ramp vortex generator on the fin surface

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dc.authoridTEPE, Ahmet Umit/0000-0001-7626-6348
dc.contributor.authorTepe, Ahmet Umit
dc.date.accessioned2025-03-23T19:41:26Z
dc.date.available2025-03-23T19:41:26Z
dc.date.issued2021
dc.departmentSinop Üniversitesi
dc.description.abstractExistence of the vortices in a flow field strongly affects the heat transfer. In this study, effect of newly proposed punched triangular ramp vortex generator (PRVG) on heat transfer performance for a fin-tube heat exchanger was investigated numerically. Normalized ramp height (H/d=0.196 and 0.161) and ramp angle (alpha(r)=20 degrees and 35 degrees) were examined as the geometric parameter. Numerical computations were carried out under turbulent flow conditions (5000 <= Re <= 20000). RANS equations were solved using ANSYS Fluent by using SST k-omega turbulence model. Nusselt (Nu) number, friction factor and Performance Evaluation Criterion (PEC) were comprehensively examined quantitatively. Flow characteristics were also investigated for elucidating the underlying physics of enhancement heat transfer by the PRVG winglet. Results were compared with the flat smooth fin surface (baseline case). Results showed that overall heat transfer on the entire channel wall increases up to 43.66% for Re=5000 by H/d=0.196 and alpha(r) =35 degrees. The influence of ramp angle on thermo-hydraulic performance was more significant compared to ramp height. Furthermore, PEC results showed that the most feasible geometric design of PRVG winglet for the fin-tube heat exchanger is H/d=0.161 and alpha(r) =20 degrees. Furthermore, decreasing flow speed in the channel increases the effectiveness of the vortex generator according to PEC results. (C) 2021 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijheatmasstransfer.2021.121326
dc.identifier.issn0017-9310
dc.identifier.issn1879-2189
dc.identifier.scopus2-s2.0-85104308569
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.ijheatmasstransfer.2021.121326
dc.identifier.urihttps://hdl.handle.net/11486/6581
dc.identifier.volume174
dc.identifier.wosWOS:000647617700032
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorTepe, Ahmet Umit
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Journal of Heat and Mass Transfer
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectHeat transfer
dc.subjectvortex generator
dc.subjectforced convection
dc.subjectheat exchanger
dc.subjectCFD
dc.titleHeat transfer enhancement of fin-tube heat exchangers using punched triangular ramp vortex generator on the fin surface
dc.typeArticle

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