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dc.contributor.authorBartl, Jan Michael Simon
dc.contributor.authorSagmo, Kristian Forfot
dc.contributor.authorBracchi, Tania
dc.contributor.authorSætran, Lars Roar
dc.identifier.citationEuropean journal of mechanics. B, Fluids. 2019, 75 180-192.nb_NO
dc.description.abstractLift, drag and surface pressure measurements are performed on a wing section of the NREL S826 wind turbine airfoil at eight Reynolds numbers ranging from 0:5_105 to 6:0_105. Alongside with the measurements two types of Reynolds averaged Navier-Stokes (RANS) simulations are performed, one of which in- cludes a laminar to turbulent transition model. The lift and drag characteristics are observed to be dominated by low Reynolds number e_ects for Re < 0:7_105, related to the presence of laminar separation bubbles (LSBs) on the suction side of the pro_le. For Re _ 0:7_105 the airfoil's performance is rather independent of the Re-number for the present free stream turbulence intensities, while sig- ni_cantly higher peak lift is measured than in earlier experiments on the same airfoil. At high angles of attack, strong three-dimensional spanwise surface ow distribution reminiscent of a single stall cell is observed. The RANS simulations in a two-dimensional domain including the Langtry-Menter ����� Re_ transition model accurately predict lift and drag coe_cients as long as the ow is fairly attached. Further, the ����� Re_ model simulations are observed to predict the location and average size of the LSBs in this region.nb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titlePerformance of the NREL S826 airfoil at low to moderate Reynolds numbers — A reference experiment for CFD modelsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalEuropean journal of mechanics. B, Fluidsnb_NO
dc.description.localcode© 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 9 October 2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
cristin.unitnameInstitutt for energi- og prosessteknikk

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