Aerodynamics of windturbines


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In this presentation a brief introduction is given on parts of wind turbine, classification of wind turbines, importance of wind turbines, current status like installed capacity (annual and cumulative) . Then there is a explanation on theory behind the design of wind turbine blades i.e, AERODYNAMICS OF WIND TURBINES which includes explanation about shape of an aerofoil, its different parameters, lift force, drag force, different equations about lift drag force, NACA profiles, Blade Element Momentum Theory, etc.

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Aerodynamics of windturbines

  1. 1. S.D.M. College of Engineering & Technology Department Of Mechanical Engineering Seminar On Aerodynamics of Wind Turbines By Gururaja Murthy.D 2SD10ME037
  2. 2. Abstract: In this seminar it is aimed at presenting a clear idea about the basics of wind energy and the aerodynamics behind the design of wind turbine blades.
  3. 3. Fundamentals of Wind Turbines • Wind Power: Conversion of wind energy into a useful form of energy. ex. wind turbine, wind mills, wind pumps • Wind turbine: A wind turbine is a device that converts kinetic energy from the wind into electrical power.
  4. 4. Fundamentals of Wind Turbines[1] 1. Foundation 2. To electric grid 3. Tower 4. Access ladder 5. Yaw Control 6. Nacelle 7. Generator 8. Anemometer 9. Brake 10. Gearbox 11. Rotor blade 12. Pitch control 13. Rotor Hub
  5. 5. Types of Wind Energy Conversion Devices[2] 1. Horizontal Axis i. Dutch Windmill ii. Multiblade water pumping windmills iii. High speed propeller type windmills 2. Vertical Axis i. The savonius rotor ii. The darrieus rotor iii. Giromill
  6. 6. Importance of Wind Energy 1. A country will become more self-sufficient by using alternatives such as wind power. 2. No CO₂ emissions 3. Creates jobs. 4. Can be used for charging batteries or can be combined with a diesel engine to save fuel
  7. 7. Importance of Wind Energy Cumulative wind power addition from 1996 – 2013.[3]
  8. 8. Importance of Wind Energy Annual wind power addition from 1996 – 2013[3]
  9. 9. Aerodynamics of Wind Turbine Blades[4] 1. Aerofoil structure 2. Long and slender blades 3. The span wise velocity component is much lower than the stream wise component 4. Hence it is assumed that the flow at a given radial position is 2-D and that 2-D aerofoil data can be applied.
  10. 10. Nomenclature of Airfoil and basic definitions Nomenclature of aerofoil section[5]
  11. 11. Nomenclature of Airfoil and basic definitions Different parameters of aerofoil section
  12. 12. NACA Profiles: • NACA: National Advisory Committee for Aeronautics • NACA 4 digit series: ex. NACA0012, NACA2415 Shape of an aerofoil
  13. 13. NACA Profiles: • FL = ½ρAbw2CL N • FD = ½ρAbw2CD N CL Vs CD for NACA2404 [5]
  14. 14. Blade element momentum theory[2]
  15. 15. References: [2] S. N. Bhadra, D. Kastha, and S. Banerjee: “Wind Electrical Systems”, 1stEdition, Oxford publications. [4]Martin O. L. Hansen: “Aerodynamics of Wind Turbines”, 2nd Edition published by Earthscan in the UK and USA in 2008. ISBN: 978-1-84407-438-9 [3]Global Wind Statistics 2013, released by Global Wind Energy Council on 05/02/2014 [5]DesignFOIL® R6 demo software. [1]
  16. 16. Conclusion: 1. Wind energy is gaining importance all over the world and it is important to study the technology behind it so that one can be able to harness more power from wind energy. 2. Countries like India should involve in R&D projects related to it and should generate more power from wind energy so that the dependence on coal will be reduced which reduces the import of coal.
  17. 17. Thank You