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A robust methodology for the design optimization of diffuser augmented wind turbine shrouds

Leloudas Stavros, Lygidakis Georgios, Eskantar Alexandros, Nikolos Ioannis

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URIhttp://purl.tuc.gr/dl/dias/E32E6145-60F1-4CD5-A0A2-53ABF5F7D5D0-
Identifierhttps://doi.org/10.1016/j.renene.2019.12.098-
Identifierhttps://www.sciencedirect.com/science/article/pii/S0960148119319706-
Languageen-
Extent21 pagesen
TitleA robust methodology for the design optimization of diffuser augmented wind turbine shroudsen
CreatorLeloudas Stavrosen
CreatorΛελουδας Σταυροςel
CreatorLygidakis Georgiosen
CreatorΛυγιδακης Γεωργιοςel
CreatorEskantar Alexandrosen
CreatorΕσκανταρ Αλεξανδροςel
CreatorNikolos Ioannisen
CreatorΝικολος Ιωαννηςel
PublisherElsevieren
Content SummaryShrouded wind turbines represent an attractive solution of high potential that could improve significantly the feasibility of renewable energy production at sites characterized by poor wind resources. This work presents the development of a modular optimization scheme for the aerodynamic shape optimization of diffuser-augmented wind turbine (DAWT) shrouds. For the numerical simulation of the incompressible flow field, an axisymmetric RANS solver has been implemented, based on the artificial compressibility method and SST turbulence model. The major features of the RANS solver are demonstrated, while its validity is assessed against both numerical and experimental data. Mesh and geometry parameterization are simultaneously succeeded by employing an in-house developed computational tool, based on the well-known Free-Form Deformation (FFD) technique. The backbone of the optimization framework is formed by a parallel and asynchronous Differential Evolution (DE) algorithm, which is assisted by Artificial Neural Network (ANN) meta-models. The proposed methodology is applied to the design optimization of an axisymmetric shroud (diffuser) for a 15 kW wind turbine, aiming to maximize the mean velocity speed-up ratio and minimize drag, under geometrical constrains. The resulting designs are capable of providing high velocity accelerations, accompanied by considerable reduction in drag and volume.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2021-08-30-
Date of Publication2020-
SubjectWind energyen
SubjectShrouded wind turbinesen
SubjectComputational Fluid Dynamics (CFD)en
SubjectShape optimizationen
SubjectDifferential evolution algorithmen
SubjectFree-form deformationen
Bibliographic CitationS. N. Leloudas, G. N. Lygidakis, A. I. Eskantar, and I. K. Nikolos, “A robust methodology for the design optimization of diffuser augmented wind turbine shrouds,” Renew. Energy, vol. 150, pp. 722–742, May 2020. doi: 10.1016/j.renene.2019.12.098 en

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