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Effects of Wind Shear Flow on the Aeroelastic Performance of a Large-Scale Wind Turbine with UBEM

Hossein, Amir Hossein | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51362 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ebrahimi, Abbas; Taeibi-Rahni, Mohamad; Rezaei, Mohamad Mahdi
  7. Abstract:
  8. Study of the structural flexibility of large-scale wind turbine components on aeroelastic performance is important under the existence of critical atmospheric conditions. Prediction and control the critical deformations, identifying maximum local deformation and modeling the forces involved, are required. Aeroelasticity analysis is a suitable method for studying the coupling effects of wind turbine aerodynamics, dynamics and structures. This research has been done by modeling wind turbine components including blades, hub, nacelle and tower, taking into account aerodynamic couplings, dynamics and structures. Considering the large scale of reference wind turbine, nonlinear equations have added to the complexity of the problem and the computational cost, and it is necessary to study the interactions of aerodynamic, inertial and centrifugal forces. One of the methods used to analyze these types of problems is the equivalent beam model. The aerodynamic forces of the rotor are calculated using the modified unsteady blade element momentum method, which, along with the low computational cost, has the proper accuracy in simulating various flow phenomena, such as dynamic wake effects. Using the existing tools, the deformations of the reference wind turbine and its time responses were studied in different wind shears and turbulence intensities
  9. Keywords:
  10. Horizontal Axis Wind Turbine (HAWT) ; Aeroelasticity ; Unsteady Aerodynamic ; Wind Shear ; Unsteadyblade Element Momentum Theory ; Nonlinear Equivalent Beam Method ; Wind Turbulence

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