Aerodynamic effects of Gurney flaps on the rotor blades of a research wind turbine

dc.contributor.authorAlber, Jörg
dc.contributor.authorSoto-Valle, Rodrigo
dc.contributor.authorManolesos, Marinos
dc.contributor.authorBartholomay, Sirko
dc.contributor.authorNayeri, Christian Navid
dc.contributor.authorSchönlau, Marvin
dc.contributor.authorMenzel, Christian
dc.contributor.authorPaschereit, Christian Oliver
dc.contributor.authorTwele, Joachim
dc.contributor.authorFortmann, Jens
dc.date.accessioned2021-01-04T13:41:00Z
dc.date.available2021-01-04T13:41:00Z
dc.date.issued2020-11-26
dc.description.abstractThis paper investigates the aerodynamic impact of Gurney flaps on a research wind turbine of the Hermann-Föttinger Institute at the Technische Universität Berlin. The rotor radius is 1.5 m, and the blade configurations consist of the clean and the tripped baseline cases, emulating the effects of forced leading-edge transition. The wind tunnel experiments include three operation points based on tip speed ratios of 3.0, 4.3, and 5.6, reaching Reynolds numbers of approximately 2.5×105. The measurements are taken by means of three different methods: ultrasonic anemometry in the wake, surface pressure taps in the midspan blade region, and strain gauges at the blade root. The retrofit applications consist of two Gurney flap heights of 0.5 % and 1.0 % in relation to the chord length, which are implemented perpendicular to the pressure side at the trailing edge. As a result, the Gurney flap configurations lead to performance improvements in terms of the axial wake velocities, the angles of attack and the lift coefficients. The enhancement of the root bending moments implies an increase in both the rotor torque and the thrust. Furthermore, the aerodynamic impact appears to be more pronounced in the tripped case compared to the clean case. Gurney flaps are considered a passive flow-control device worth investigating for the use on horizontal-axis wind turbines.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2020en
dc.identifier.eissn2366-7451
dc.identifier.issn2366-7443
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/12332
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-11176
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc600 Technik, Technologiede
dc.subject.otherGurney flapsen
dc.subject.otherrotor bladesen
dc.subject.otherwind turbineen
dc.titleAerodynamic effects of Gurney flaps on the rotor blades of a research wind turbineen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.5194/wes-5-1645-2020en
dcterms.bibliographicCitation.issue4en
dcterms.bibliographicCitation.journaltitleWind Energy Scienceen
dcterms.bibliographicCitation.originalpublishernameCopernicusen
dcterms.bibliographicCitation.originalpublisherplaceGöttingenen
dcterms.bibliographicCitation.pageend1662en
dcterms.bibliographicCitation.pagestart1645en
dcterms.bibliographicCitation.volume5en
tub.accessrights.dnbfreeen
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme>Inst. Strömungsmechanik und Technische Akustik (ISTA)>FG Experimentelle Strömungsmechanikde
tub.affiliation.facultyFak. 5 Verkehrs- und Maschinensystemede
tub.affiliation.groupFG Experimentelle Strömungsmechanikde
tub.affiliation.instituteInst. Strömungsmechanik und Technische Akustik (ISTA)de
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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