Heat Transfer Enhancement in a Heat Exchanger Tube with 45° Rectangular-Winglet Pairs

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dc.contributor.authorTongyote, P.
dc.contributor.authorSripattanapipat, S.
dc.contributor.authorPromvonge, P.
dc.date.accessioned2026-08-06T10:24:25Z
dc.date.available2026-08-06T10:24:25Z
dc.date.issued2019-04-09
dc.description.abstractAn experimental investigation on thermal characteristics in a heat exchanger equipped with 45° rectangular winglet pairs (RWP) is conducted using air flowing in a constant heat flux tube with Reynolds number (Re) in a range of 5,200 to 23,000. Parameters of RWP included three relative height or blockage ratios (BR = 0.06, 0.08 and 0.1) and two pitch-spacing ratios (PR = 1.0 and 2.0). The heat transfer and the pressure drop in the test tube are displayed in the form of Nusselt number (Nu) and friction factor (f), respectively. The investigation shows that Nu and f values of the tube with RWP insert are, respectively, in the range of about 1.55-3.2 and 3.76-6.44 times above the plain tube alone, depending on the operating condition. The maximum thermal performance for using the RWP is found to be 1.7 at the lowest Re.
dc.identifier.citationIop Conference Series Materials Science and Engineering, 501(1), 2019
dc.identifier.doi10.1088/1757-899X/501/1/012060
dc.identifier.issn17578981
dc.identifier.other2-s2.0-85064867786
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/9817
dc.sourceIop Conference Series Materials Science and Engineering
dc.subjectheat transfer
dc.subjectpressure loss
dc.subjectrectangular-winglet pairs
dc.subjectthermal enhancement
dc.titleHeat Transfer Enhancement in a Heat Exchanger Tube with 45° Rectangular-Winglet Pairs
dc.typeConference Paper

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