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

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Celik Y., Ingham D., Ma L., Pourkashanian M.

Energy, vol.251, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 251
  • Publication Date: 2022
  • Doi Number: 10.1016/j.energy.2022.123881
  • Journal Name: Energy
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Computer & Applied Sciences, Environment Index, INSPEC, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Aerodynamics, Computational fluid dynamics (CFD), J-shaped aerofoil, Self-starting, Vertical axis wind turbine
  • Hakkari University Affiliated: No

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.