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Optimization of a nature-inspired shape for a vertical axis wind turbine through a numerical model and an artificial neural network
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Optimization of a nature-inspired shape for a vertical axis wind turbine through a numerical model and an artificial neural network
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Optimization of a nature-inspired shape for a vertical axis wind turbine through a numerical model and an artificial neural network
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Journal Article
Optimization of a nature-inspired shape for a vertical axis wind turbine through a numerical model and an artificial neural network
2022
Overview
[Abstract] The present work proposes an artificial neural network (ANN) to analyze vertical axis wind turbines of the Savonius type. These turbines are appropriate for low wind velocities due to their low starting torque. Nevertheless, their efficiency is too low. In order to improve the efficiency, several modifications are analyzed. First of all, an innovative blade profile biologically inspired is proposed. After that, the influence of several parameters such as the aspect ratio, overlap, and twist angle was analyzed through a CFD (computational fluid dynamics) model. In order to characterize the most appropriate combination of aspect ratio, overlap, and twist angle, an artificial neural network is proposed. A data set containing 125 data points was obtained through CFD. This data set was used to develop the artificial neural network. Once established, the artificial neural network was employed to analyze 793,881 combinations of different aspect ratios, overlaps, and twist angles. It was found that the maximum power coefficient, 0.3263, corresponds to aspect ratio 7.5, overlap/chord length ratio 0.1125, and twist angle 112. This corresponds to a 32.4% increment in comparison to the original case analyzed with aspect ratio 1, overlap 0, and twist angle 0.
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