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The Study of Megawatt Wind Turbine Rotor Performance in Presence of Contamination Using CFD

Mohajer, Abbas | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46754 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Darbandi, Masoud; Taiebi Rahni, Mohammad
  7. Abstract:
  8. Considering the negative effects of contamination on wind turbine blade performance, we investigate aerodynamics performance of a one- Megawatt wind turbine. To achieve this, we compare the performance and power of the wind turbine with and without contaminations. To calculate the wind turbine output power, we use a developed wind turbine calculator, which benefits from the Blade Element Momentum (BEM) theory. Furthermore, the aerodynamics calculations are performed using of a commercial software for clean and rough airfoils. Considering the change of Reynolds number along the blade axis, the airfoil characteristics are calculated for two Reynolds numbers of 0.5 and 3.5 millions to increase the accuracy of calculated output power. In our numerical simulation, we use the Transitional SST turbulence model, in which the airfoil roughness effect is considered on the transition point variation. In order to improve our 2D BEM modeling, we apply the 3D Correction expressions to extend our power calculation for 3D considerations. Eventually, we optimize the designed rotor considering the performance loss due to contamination situations. In this regard, we use a wind turbine design code, which benefits from the Genetic Algorithm method. At the first step, we consider only the performance criterion in our optimization algorithm. However, as a multi-objective optimization procedure, we implement both the performance and structural criteria as the second step in our optimization
  9. Keywords:
  10. Wind Turbine ; Airfoil ; Optimization ; Computational Fluid Dynamics (CFD) ; Annual Energy Production ; Blade Roughness ; Blade Element Momentum Theory

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