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Aerodynamic shape optimization of diffuser augmented wind turbine shrouds using asynchronous differential evolution

Leloudas Stavros, Lygidakis Georgios, Strofylas Giorgos, Nikolos Ioannis

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URIhttp://purl.tuc.gr/dl/dias/142EEDC9-CE68-4868-B5C0-4F40682B9C4F-
Identifierhttps://doi.org/10.1115/IMECE201886820-
Identifierhttps://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2018/52101/V007T09A085/276567-
Languageen-
Extent10 pagesen
TitleAerodynamic shape optimization of diffuser augmented wind turbine shrouds using asynchronous differential evolutionen
CreatorLeloudas Stavrosen
CreatorΛελουδας Σταυροςel
CreatorLygidakis Georgiosen
CreatorΛυγιδακης Γεωργιοςel
CreatorStrofylas Giorgosen
CreatorΣτροφυλας Γιωργοςel
CreatorNikolos Ioannisen
CreatorΝικολος Ιωαννηςel
PublisherAmerican Society of Mechanical Engineersen
Content SummaryAn adaptable numerical scheme for the aerodynamic shape optimization of axisymmetric diffuser-augmented wind turbine shrouds is demonstrated in this work, using an asynchronous and parallel version of a Differential Evolution (DE) algorithm. The simulation of the incompressible flow field about each candidate geometry is succeeded by means of an in-house Computational Fluid Dynamics (CFD) solver, that has been developed based on the specially modified, by the artificial compressibility approach, Navier-Stokes equations, expressed in non-dimensional form, for 2D-axisymmetric frames of reference. The discretization of the computational domain is made with 2D hybrid unstructured meshes, composed by both triangular and quadrilateral elements, combined with a node-centered finite-volume scheme, while the Free-Form Deformation (FFD) technique is applied, for both the parameterization of the design geometry and the morphing of the computational mesh. The required data transfer between the DE algorithm and the CFD solver is accomplished with appropriate text files, while the parallel implementation is achieved utilizing the Message Passing Interface (MPI) library functions. Further acceleration of the optimization procedure is succeeded by the combination of the DE with surrogate models, in order to replace the costly CFD-based evaluations of the candidate solutions with fast, but approximate estimations of their cost function.en
Type of ItemΠλήρης Δημοσίευση σε Συνέδριοel
Type of ItemConference Full Paperen
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2019-10-07-
Date of Publication2018-
SubjectComputational fluid dynamicsen
SubjectDifferential evolutionen
SubjectDiffuseren
SubjectParallelizationen
SubjectShape optimizationen
SubjectWind energyen
Bibliographic CitationS.N. Leloudas, G.N. Lygidakis, G.A. Strofylas and I.K. Nikolos, "Aerodynamic shape optimization of diffuser augmented wind turbine shrouds using asynchronous differential evolution," in ASME 2018 International Mechanical Engineering Congress and Exposition, 2018. doi: 10.1115/IMECE201886820en

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