Unsteady Aerodynamic Simulation of Horizontal Axis Wind Turbine (HAWT)

Radmanesh, Amirreza | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 47228 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Abbaspour, Madjid; Soltani, Mohamad Reza
  7. Abstract:
  8. The ultimate aim of this research is optimizing high- performance Horizontal Axis Wind Turbine (HAWT) associated with using Computational fluid dynamics (CFD) to predict the flow behavior over wind turbine blades. Computational prediction of the flow over wind turbines is a challenging numerical problem because of the complicated aerodynamics and large variation in length scales. Phenomena such as; the unsteady flow, vortex shedding of the blade tips, flow separation, complicated blade geometry due to variable twist and chord and changes in angle of attack, and highly turbulent flow over blade sections makes CFD prediction challenging, as well as interesting. The goal is to gain an in depth understanding of the important factors related to computational fluid dynamic modeling of wind turbines. In order to achieve this goal, certain specific objectives were determined. The first phase objective of the research is a CFD analysis of a 2D airfoil wind turbine blade. The final objective of this research is to perform aerodynamic analysis of the Large Scale wind turbine
  9. Keywords:
  10. Finite Volume Method ; Turbine Blades ; Wind Turbine Aerodynamic ; Unsteady Compressible Flow ; 8MW Wind Turbine ; Horizontal Axis Wind Turbine (HAWT)

 Digital Object List


  • Fundamental Concepts in Wind Turbine
    • Introduction
    • Power Absorption By a Turbine
    • Description of Wind Turbines
    • Introduction
    • Force From Wind
      • Drag
      • Lift
    • Airfoils
      • Leading edge
      • Trailing edge
      • Chord
      • Chord line
      • Cambered airfoil
      • Mean camber line
      • Airfoil
    • Aerodynamic forces
      • Propeller wind turbines blade
      • Relative Motion and Relative Speed
      • Torque from Wind on a Turbine Shaft
      • Speeds of Different Points on a Turbine Blade
      • Blade twist
    • Three Blade Propellers Wind Turbine and Components
      • Introduction
      • Mechanical components
        • Tower
        • Foundation
        • Rotor (blades and hub)
        • Nacelle
        • Gearbox
        • Turbine brake
      • Electrical components
        • Generators
        • Transformers
    • Wind Turbine Mechanical Design
      • Introduction
      • Loads on the rotor
      • Aerodynamic loads on the blade
      • Other blade loads
  • Description of Two Dimensional Approach
    • Introduction
    • Design Approach
    • Method of Analysis (Turbulence model, Boundary condition and Simulation)
    • Turbulence Modeling Relation
    • Validations of the Result
    • Results and Discussion
      • Lift and Drag Coefficient
      • Pressure Distribution
    • Velocity and Pressure Contour
    • Streamlines
  • Methodology and Description of Three Dimensional Approach
    • Introduction
    • Literature Review
    • Geometric Model
      • Airfoil Shapes
      • Chord and Twist Distributions
    • Aero structural Model
      • Airfoil Aerodynamics
      • Wind Turbine Aerodynamics and Performance
    • Computational grid and domain
      • Structured grid
      • Unstructured grid
      • Grid Study
    • CFD and Wind Turbines
      • Introducing CFD
      • URANS equations
      • Turbulent modeling
      • Modeling flows with rotating reference frames
      • Finite Volume approach
      • The pressure-based solver
      • Pressure-Velocity Coupling
      • Discretization scheme
  • Results and Discussions
    • Introduction
    • Pressure distributions plots for different inlet wind speeds at various blade sections
    • Stream line of blade
  • Conclusions and Future Work
...see more