Heat transfer mechanism and thermal performance of a channel with square-wing perforated transverse baffles installed: effect of square-wing location

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dc.contributor.authorEiamsa-Ard, Smith
dc.contributor.authorPhila, Arnut
dc.contributor.authorPimsarn, Monsak
dc.contributor.authorMaruyama, Naoki
dc.contributor.authorHirota, Masafumi
dc.date.accessioned2026-08-06T10:41:33Z
dc.date.available2026-08-06T10:41:33Z
dc.date.issued2023-05-01
dc.description.abstractThe aim of this study is to report the influence of wing position (h/e) of perforated transverse baffles with square-wings (SW-PBs) on heat transfer rate and pressure drop characteristics in a channel. The channel has a cross-sectional dimension of 15 cm × 4 cm and a length of 60 cm. Two types of baffles: Solid transverse baffles and square-wing perforated transverse baffles, are comparatively tested. The baffle pitch ratio (p/e) is set to 5.0 and remains constant throughout all experiments which encompass Reynolds numbers (Re) of 6000, 9000, 12,000, 15,000, 18,000, 21,000, and 24,000. Square-wings are introduced at four different locations, h/e = 0.92 (highest wing location), 0.83, 0.75, and 0.67 (lowest wing location). The maximum heat transfer rates achieved in channels with SW-PBs at h/e = 0.92, 0.83, 0.75, and 0.67 are 148%, 157%, 166%, and 180% above that of a plain channel, while pressure losses increase by 9.51–10.69, 9.56–10.79, 9.59–10.86, and 9.64–10.99 times, respectively. Experimental results show that square-wings create multiple impinging jet flows and Nusselt number peaks appear adjacent to the rear of the perforated transverse baffles. When compared to solid transverse baffles, SW-PBs cause lower pressure losses and yield higher thermal performance.
dc.identifier.citationJournal of Thermal Analysis and Calorimetry, 148(9), 3835-3849, 2023
dc.identifier.doi10.1007/s10973-022-11937-w
dc.identifier.issn13886150
dc.identifier.other2-s2.0-85145918817
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/14438
dc.sourceJournal of Thermal Analysis and Calorimetry
dc.subjectChannel
dc.subjectHeat transfer enhancement
dc.subjectMultiple impinging jets
dc.subjectPerforated baffle
dc.subjectRecirculation flow
dc.subjectSolid transverse baffle
dc.subjectSquare-wing perforated transverse baffle
dc.titleHeat transfer mechanism and thermal performance of a channel with square-wing perforated transverse baffles installed: effect of square-wing location
dc.typeArticle

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