Assessment of 10-kW swept-bladed horizontal axis wind turbines performance by modified blade element momentum method
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Kamal Abdel Radi Ismail 1 , Pedro Antonio Assad Baracat 1 2 *
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1 Department of Energy, Faculty of Mechanical Engineering, State University of Campinas, Campinas/SP, BRAZIL2 Fundação para Inovações Tecnológicas (FITec), Campinas/SP, BRAZIL* Corresponding Author

Abstract

In this work, a modified blade element momentum algorithm of low computational cost was written in MATLAB, to analyze the concept of swept blade horizontal axis wind turbine. The algorithm was validated by comparing the numerical predictions with results available in the literature. Different geometrical arrangements of 10-kW horizontal axis wind turbines with Göttingen airfoils (GOEs) with different maximum thickness and camber to chord ratios and tip sweep angles were designed and compared. The influence of maximum thickness and camber to chord ratios, as well as the blade tip sweep angle over the power generation, torque and thrust of horizontal axis wind turbines were evaluated. The torque and thrust distributions as well as the contributions of the different regions of the blades to power generation were also assessed. Results showed that high maximum thickness to chord ratio and moderate maximum chamber to chord ratio increase power generation. For horizontal axis wind turbines using GOE 413 airfoil with tip speed ratio (TSR) equal to 8, the tip sweep angle of 40° resulted in a power generation of 10,669.81 W and a thrust of 1,776.89 N, which are 6.16% higher and 31.32% lower than the straight blade case, respectively. Also, it was found that the thrust generated in the backward swept blade regions is lower than the cases of straight blade and forward swept blade. The results confirm the adequacy of backward sweep blades for horizontal axis wind turbine rotors for TSR equal to 8 at a wind velocity of 9 m/s, due to the power generation increase and thrust reduction. Also, the results confirm that backward swept blades are appropriate for high size rotors, due to the thrust reduction, which reduces the structural deformation.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Article Type: Research Article

EUR J SUSTAIN DEV RES, Volume 9, Issue 2, 2025, Article No: em0282

https://doi.org/10.29333/ejosdr/16053

Publication date: 01 Apr 2025

Online publication date: 25 Feb 2025

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Article Downloads: 94

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