A SEMINAR ON IMPACT OF AERODYNAMICS IN DESIGN

Guided By:- Avadhoot Rajurkar Prepared By:- Maulik Shah

05ME77

WHAT IS AERODYNAMICS?

Aerodynamics is a branch of dynamics

concerned with studying the motion of air, particularly when it interacts with a moving object.

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 .

AEROFOIL

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.

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.

DRAG

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.

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.

IMPACT OF GOOD AERODYNAMICS

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?

BICYCLE AERODYNAMICS

Hindrance due resistance to wind resistance

How to reduce it?

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

PARTS OF AIRCRAFT

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.

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

REFERENCES:-

http://en.wikipedia.org/wiki/Image:Denney.kitfox.g-foxc.asp

http://www.grc/nasa.gov/WWW/Wright/airplane/shape.html

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