Design and aerodynamic performance analyses of the self-starting H-type VAWT having J-shaped aerofoils considering various design parameters using CFD

Yunus Celik, Derek Ingham, Lin Ma and Mohamed Pourkashanian

Energy, 2022, vol. 251, issue C

Abstract: Although the J-shaped aerofoil is a possible solution to enhance the torque generation at the low tip speed ratios, the effect of the J-shaped aerofoil on the overall and the dynamic start-up performances of the H-type VAWT has not been extensively studied. Therefore, for the first time, the present study is aimed at exploring the impact of the J-shaped aerofoil with different values of opening ratio on overall and dynamic start-up performance of the H-type VAWT considering different design parameters. The results show that a dynamic start-up model is needed to fully examine the self-starting capability of the J-shaped aerofoil instead of using calculated torque/power coefficients at the constant tip speed ratios. In addition, while the opening located at the inner surface of the aerofoil does not bring any benefit, the turbine self-starting ability increases with the increase in the opening ratio. Furthermore, there is a noticeable enhancement in the starting ability when the thicker NACA0018 aerofoil is employed, and the reversed version of the cambered aerofoils demonstrates a better self-starting capability compared to their original profiles. Additionally, the turbine with the J-shaped aerofoil having a slightly positive pitch angle (β=2°) has been found to have a better self-starting ability.

Keywords: J-shaped aerofoil; Self-starting; Vertical axis wind turbine; Computational fluid dynamics (CFD); Aerodynamics (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:251:y:2022:i:c:s0360544222007848

DOI: 10.1016/j.energy.2022.123881

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