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.

1. S.D.M. College of Engineering & Technology
Department Of Mechanical Engineering
Seminar On
Aerodynamics of Wind Turbines
By
Gururaja Murthy.D 2SD10ME037

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. 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. 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. 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

7. 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

8. Importance of Wind Energy
Cumulative wind power addition from 1996 – 2013.[3]

9. Importance of Wind Energy
Annual wind power addition from 1996 – 2013[3]

10. 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.

11. Nomenclature of Airfoil and basic definitions
Nomenclature of aerofoil section[5]

12. Nomenclature of Airfoil and basic definitions
Different parameters of aerofoil section

13. NACA Profiles:
• NACA: National Advisory Committee for Aeronautics
• NACA 4 digit series:
ex. NACA0012, NACA2415
Shape of an aerofoil

14. NACA Profiles:
• FL = ½ρAbw2CL N
• FD = ½ρAbw2CD N
CL Vs CD for NACA2404 [5]

15. Blade element momentum theory[2]

16. 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] http://en.wikipedia.org/wiki/Wind_turbine_design

17. 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.

18. Thank You