Figures index

From

Numerical Modelling of an H-type Darrieus Wind Turbine Performance under Turbulent Wind

Ahmed Ahmedov, K. M. Ebrahimi

American Journal of Energy Research. 2017, 5(3), 63-78 doi:10.12691/ajer-5-3-1
  • Figure 1. Vortex generation and shedding during the rotation of a Darrieus turbine
  • Figure 2. Darrieus turbine power coefficient curve
  • Figure 3. The main velocity components and the aerodynamic force acting on the wind turbine blades
  • Figure 4. Variation of the blades angle of attack at different angular position of the turbine at several different tip-speed ratios
  • Figure 5. Reduced frequencies against the tip-speed ratios at several chord to radios ratios
  • Figure 6. 3D geometric model of the H-Darrieus turbine
  • Figure 7. Initial position of the turbine rotor defined by the angular position of blade 1
  • Figure 8. Computational domain size and boundary conditions
  • Figure 9. Generated computational mesh for the H-Darrieus wind turbine
  • Figure 10. Solution independence study in regard of some of the computational parameters
  • Figure 11. Instantaneous values of the torque generated by blade 1
  • Figure 12. Torque distribution for a full turbine revolution
  • Figure 13. H-Darrieus wind turbine performance characteristics
  • Figure 14. H-Darrieus wind turbine aerodynamic characteristics
  • Figure 15. H-Darrieus wind turbine performance characteristics under different wind speeds
  • Figure 16. Instantaneous distribution of the normal force action on blade 1
  • Figure 17. Normal force distribution for a full turbine revolution
  • Figure 18. Normal force performance and aerodynamic characteristics
  • Figure 19. Normal force at different constant wind speeds
  • Figure 20. Turbulent intensity of the flow around blade 1 at tip-speed ratios λ = 0.5 and λ = 2
  • Figure 21. Vortex structures and flow velocity distribution through the turbine rotor
  • Figure 22. Flow visualization through and behind the turbine rotor