This seminar discusses the impact of aerodynamics in design. It defines aerodynamics and airfoils, including airfoil terminology. It describes drag and how aerodynamics is seen in nature. The seminar discusses the necessity of aerodynamic design and its impact for cars, bicycles, aircrafts, and hovercrafts. It provides examples of aerodynamic considerations for each.

1. A SEMINAR ON IMPACT OF
AERODYNAMICS IN DESIGN
Guided By:-
Avadhoot Rajurkar
Prepared By:-
Maulik Shah
05ME77

2. WHAT IS AERODYNAMICS?
Aerodynamics is a branch of dynamics
concerned with studying the motion of air,
particularly when it interacts with a moving
object.

3. WHAT IS AEROFOIL?
Aerofoil is a device that produces reactive forces
when in relative motion to the surrounding air.
An airfoil, or aerofoil is the shape of a wing or
blade (of a propeller, rotor or turbine) or sail
as seen in cross-section .

4. AEROFOIL

5. AEROFOIL TERMINOLOGY
 The mean camber line is a line drawn
midway between the upper and lower surfaces.
 The chord line is a straight line connecting the
leading and trailing edges of the airfoil, at the
ends of the mean camber line.
 The chord is the length of the chord line and is
the characteristic dimension of the airfoil
section.
 The maximum thickness and the location of
maximum thickness are expressed as a
percentage of the chord.

6. WHAT IS DRAG?
 Drag is the aerodynamic force that opposes an
aircraft's motion through the air .
 Drag is a mechanical force.
 It is generated by the interaction and contact
of a solid body with a fluid.

7. DRAG

8. AERODYNAMICS IN NATURE
 Feathers are example of aerodynamic
design of nature.
 The tail of the bird plays a big role during
flight. The tail acts as the rudder, balancing
and steering the bird. The tail also helps the
bird in stopping. The tail is turned downward
and acts like a brake.
 Shape of the wing resembles an aerofoil.

9. AERODYNAMIC DESIGN
Why is it necessary?
It is necessary because for example:-
At highway speeds, most of the energy
needed to move a car down the road goes to
pushing air out of its way On the EPA highway
cycle with an average speed of 48 mph, 54% of
the energy required to move a car goes to
aerodynamic drag. Because drag increases with
the square of speed, more than twice as much
energy would be required to overcome drag at 70
mph.

10. IMPACT OF GOOD
AERODYNAMICS

11. CAR AERODYNAMICS
 What do you mean by car
Aerodynamics?
 How will it change car physics?
 What will be modification required in
body of a car?

13. BICYCLE AERODYNAMICS
 Hindrance due resistance to wind resistance
 How to reduce it?

14. AIRCRAFT AERODYNAMICS
 Advances made in CFD technologies, coupled
with the phenomenal growth in the speed and
memory of computers in the last decade, have
made it possible to routinely conduct
aerodynamic simulations of complete aircraft
configurations.
 The ability to model a complete aircraft at
desired flight conditions provides valuable
aerodynamic data to enable faster and cheaper
design and evaluation cycles

15. PARTS OF AIRCRAFT

16.  The F/A-18 results shown here
were obtained by CFDRC
engineers from separate studies
for buffet and control analysis and
for store loaded aircraft
aerodynamic predictions.
 The simulations shown here were
performed by CFDRC engineers to
predict the flow field of a generic
Rotor Body Interaction (ROBIN)
helicopter body with a four-bladed
rotor in a hover configuration.

17. HOVERCRAFT AERODYNAMICS
 While designing hovercraft one has to keep in
mind following aspects:-
 Dynamic effect and hump drag
 Aerodynamic drag
 Lift
 Thrust
 Skirts
 Stability
 Thrust reversers

18. REFERENCES:-
 http://en.wikipedia.org/wiki/Image:Denney.kitfox.g-
foxc.asp
 http://www.grc/nasa.gov/WWW/Wright/airplane/shape.h
tml
 http://www.grc.nasa.gov/WWW/Wright/airplane/incline.
html
 http://en.wikipedia.org/wiki/Image:PSU-90-125.PNG
 http://en.wikipedia.org/wiki/Image:Lift_drag_graph.JPG
 Encarta encyclopedia
 Britanica encyclopedia