Theoretical and computational investigations of the optimal tip-speed ratio of horizontal-axis wind turbines

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dc.authoridbakirci, mehmet/0000-0002-1061-698X
dc.contributor.authorBakirci, Mehmet
dc.contributor.authorYilmaz, Sezayi
dc.date.accessioned2024-09-29T15:57:32Z
dc.date.available2024-09-29T15:57:32Z
dc.date.issued2018
dc.departmentKarabük Üniversitesien_US
dc.description.abstractAn important factor in the optimization of the geometry of a horizontal-axis wind turbine (HAWT) is the design tip-speed ratio (DTSR). Previous research has suggested that DTSR values between 6 and 8 are desirable. However, a different approach was used in this study. Two standard airfoils with aerodynamic properties that are specified in the wind turbine airfoil catalog were selected and six different HAWT geometries were generated using the Schmitz formula for three DTSR values. These geometries were investigated theoretically based on the blade-element momentum (BEM) theory and numerically by using computational fluid dynamics (CFD) to calculate the rotor power efficiency and the optimal tipspeed ratio (OTSR). The six HAWTs had an average maximum power coefficient of 0.54 and an OTSR of 8.2 when the airfoil properties given in the airfoil catalog were used; these values were 0.43 and 6.7, respectively, when the airfoil properties were calculated using CFD and 0.41 and 7.3 when the HAWTs were simulated using three-dimensional CFD. To determine the power coefficient and OTSR values based on the BEM theory, the maximum value of CL/CD should be carefully selected considering factors such as the Reynolds numbers. Based on these findings, it was concluded that the CFD results validated the BEM theorem; the differences between the results obtained by these methods were likely due to the assumptions used when applying the BEM theory. (C) 2018 Karabuk University. Publishing services by Elsevier B.V.en_US
dc.identifier.doi10.1016/j.jestch.2018.05.006
dc.identifier.endpage1142en_US
dc.identifier.issn2215-0986
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85051626694en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1128en_US
dc.identifier.urihttps://doi.org/10.1016/j.jestch.2018.05.006
dc.identifier.urihttps://hdl.handle.net/20.500.14619/4870
dc.identifier.volume21en_US
dc.identifier.wosWOS:000449023100003en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier - Division Reed Elsevier India Pvt Ltden_US
dc.relation.ispartofEngineering Science and Technology-An International Journal-Jestechen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDesign and optimum tip-speed ratioen_US
dc.subjectWind turbinesen_US
dc.subjectReynolds numberen_US
dc.subjectComputational fluid dynamicsen_US
dc.subjectBlade element momentum theoryen_US
dc.titleTheoretical and computational investigations of the optimal tip-speed ratio of horizontal-axis wind turbinesen_US
dc.typeArticleen_US

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