Wind and Structures

  • 제22권5호
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  • Pages.595-616
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  • 2016
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Numerical study of airfoil thickness effects on the performance of J-shaped straight blade vertical axis wind turbine

  • Zamani, Mahdi (Department of Mechanical Engineering, Ferdowsi University of Mashhad) ;
  • Maghrebi, Mohammad Javad (Department of Mechanical Engineering, Ferdowsi University of Mashhad) ;
  • Moshizi, Sajad A. (Sun-Air Research Institute, Ferdowsi University of Mashhad)
  • 투고 : 2015.08.16
  • 심사 : 2016.03.24
  • 발행 : 2016.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

Providing high starting torque and efficiency simultaneously is a significant challenge for vertical axis wind turbines (VAWTs). In this paper, a new approach is studied in order to modify VAWTs performance and cogging torque. In this approach, J-shaped profiles are exploited in the structure of blades by means of eliminating the pressure side of airfoil from the maximum thickness toward the trailing edge. This new profile is a new type of VAWT airfoil using the lift and drag forces, thereby yielding a better performance at low TSRs. To simulate the fluid flow of the VAWT along with J-shaped profiles originated from NACA0018 and NACA0030, a two-dimensional computational analysis is conducted. The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the two-equation Shear Stress Transport (SST) turbulence model. The main objective of the study is to investigate the effects of J-shaped straight blade thickness on the performance characteristics of VAWT. The results obtained indicate that opting for the higher thickness in J-shaped profiles for the blade sections leads the performance and cogging torque of VAWT to enhance dramatically.

키워드

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  4. Variable Pitch Approach for Performance Improving of Straight-Bladed VAWT at Rated Tip Speed Ratio vol.8, pp.6, 2018, https://doi.org/10.3390/app8060957
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  6. Investigations of H-Darrieus rotors for different blade parameters at low wind speeds vol.25, pp.6, 2016, https://doi.org/10.12989/was.2017.25.6.551
  7. A Review on the Evolution of Darrieus Vertical Axis Wind Turbine: Small Wind Turbines vol.7, pp.4, 2016, https://doi.org/10.4236/jpee.2019.74002
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  9. Numerical Investigation on the Effects of Airfoil Leading Edge Radius on the Aerodynamic Performance of H-Rotor Darrieus Vertical Axis Wind Turbine vol.12, pp.19, 2016, https://doi.org/10.3390/en12193794
  10. Effects of blade configuration and solidity on starting torque of Darrieus wind turbine vol.32, pp.2, 2016, https://doi.org/10.12989/was.2021.32.2.169
  11. Comparison of aerodynamic performances of various airfoils from different airfoil families using CFD vol.32, pp.3, 2016, https://doi.org/10.12989/was.2021.32.3.239