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Assessment of a modified blade element momentum methodology for diffuser augmented wind turbines

Leloudas Stavros, Lygidakis Georgios, Nikolos Ioannis

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URIhttp://purl.tuc.gr/dl/dias/29865E90-E740-4992-96CC-6C45C4D9DA0E-
Identifierhttp://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2669289-
Identifierhttps://doi.org/10.1115/IMECE2017-70288-
Languageen-
Extent10 pagesen
TitleAssessment of a modified blade element momentum methodology for diffuser augmented wind turbinesen
CreatorLeloudas Stavrosen
CreatorΛελουδας Σταυροςel
CreatorLygidakis Georgiosen
CreatorΛυγιδακης Γεωργιοςel
CreatorNikolos Ioannisen
CreatorΝικολος Ιωαννηςel
PublisherAmerican Society of Mechanical Engineersen
Content SummaryThe Blade Element Momentum (BEM) theory is nowadays the cornerstone of the horizontal axis wind turbine design, as its application allows for the accurate aerodynamic simulation and power output prediction of wind turbine rotors in a remarkably short period of time. Therefore, efforts have been made for the extension of the classic BEM theory to the performance analysis of Diffuser Augmented Wind Turbines (DAWTs) as well. In this study, the development and assessment of such an in-house BEM code are presented. The proposed computational model is based on the modification of the momentum part of the classical BEM theory; thus, it is capable to account for the diffuser's effect on the calculation of the axial and tangential induction factors, through the utilization of the velocity speed-up distribution over the rotor plane of the unloaded diffuser. Furthermore, a detailed Glauert's correction model, which employs Buhl's modification, specially tailored for the DAWT case is included, to deal with the high values of the axial induction factor. The accuracy of the model is assessed against numerical and experimental results available in the literature, while the impact of the Prandtl's tip loss correction model on the rotor's predicted power output is also examined.en
Type of ItemΠλήρης Δημοσίευση σε Συνέδριοel
Type of ItemConference Full Paperen
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2018-05-31-
Date of Publication2017-
SubjectActuator disken
SubjectBEM modelen
SubjectDAWTen
SubjectDiffuseren
SubjectLowfidelity approachen
SubjectOne-dimensional theoryen
SubjectWind turbineen
Bibliographic CitationS. Leloudas, G. N. Lygidakis and I. K. Nikolos, "Assessment of a modified blade element momentum methodology for diffuser augmented wind turbines," in ASME 2017 International Mechanical Engineering Congress and Exposition, 2017. doi: 10.1115/IMECE2017-70288 en

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