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PROCEEDINGS OF THE FOURTH INTERNATIONAL CONFERENCE ON SOFT COMPUTING TECHNOLOGY IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Edited by: Y. Tsompanakis, J. Kruis and B.H.V. Topping
Reverse Engineering of a Wind Turbine Blade Surface using Differential Evolution
G.A. Strofylas and I.K. Nikolos
School of Production Engineering and Management, Technical University of Crete, Chania, Greece
G.A. Strofylas, I.K. Nikolos, "Reverse Engineering of a Wind Turbine Blade Surface using Differential Evolution", in Y. Tsompanakis, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Fourth International Conference on Soft Computing Technology in Civil, Structural and Environmental Engineering", Civil-Comp Press, Stirlingshire, UK, Paper 7, 2015. doi:10.4203/ccp.109.7
Keywords: surface reconstruction, wind turbines, NURBS, differential evolution, surrogate models.
This paper describes the development of a dedicated shape reconstruction methodology, used for the geometry definition of wind turbine blades from a given set of data points. The resulting blade geometry definition should have a low number of design variables, which include specific geometric parameters, critical in the blade design process. To this end, the proposed shape reconstruction methodology is designed to make the resulting blade definition consistent with a specialized modelling software tool, named T4T (Tools for Turbomachinery), developed for the parametric design of turbomachinery components and wind turbine blades. The shape reconstruction is formulated as an optimization procedure, based on a parallel, metamodel-assisted differential evolution (DE) algorithm. The candidate blade geometries are automatically produced by altering the design variables of a pre-defined T4T-model of the blade, while the cost function to be minimized is the sum of the squared distance between each given data point and the resulting NURBS surface of the candidate blade. The proposed methodology is evaluated in specific test cases, and its capabilities are discussed.
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