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Numerical Analysis and Optimization of Backward Swept OnHorizontal Axis Wind Turbine Blade

Salari, Mohammad Sadegh | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47094 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Boroushaki, Mehrdad; Rajabi Qahnuyeh, Abbas; Zarif Boushehri, Behzad
  7. Abstract:
  8. Aerodynamical design of backward swept for a horizontal axis wind turbine blade has been carried out to produce more power. Computational Fluid Dynamics (CFD) calculations were used for solving the conservation equations in one outer stationary reference frame and one inner rotating reference frame, where the blades and grids were fixed in reference to the rotating frame. The Reynolds Averaged Navier-Stokes (RANS) solver was validated in a test case, the National Renewable Energy Laboratory (NREL) VI blades. Simulation results show considerable agreement with the measurements. Three different turbulence models have been compared: Spalart-Allmaras, the Standard K-ε, and Shear Stress Transport K-ω. The Standard K-ε has shown the best agreement with the performed measurements. Standard K-ε was chosen for further simulations and for the backward swept design process. A sample backward sweep design firstly was applied to the blades of a Horizontal Axis Wind Turbine (HAWT) rotor, and it is obtained that the output power of the rotor increases while the axial thrust decreases. Genetic algorithm in CFD loop was implemented in the design and optimization process. The optimized sweep has shown an increase in power of about 25 % and an increase in thrust about 7%
  9. Keywords:
  10. Numerical Solution ; Artificial Neural Network ; Genetic Algorithm ; Aerodynamics ; Wind Turbine ; Genetic Algorithm ; Optimization ; Backward Swept

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