A SEMINAR ON IMPACT OF AERODYNAMICS IN DESIGN

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A SEMINAR ON IMPACT OF AERODYNAMICS IN DESIGN

• Guided By-
• Avadhoot Rajurkar
• Prepared By-
• Maulik Shah
• 05ME77

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WHAT IS AERODYNAMICS?

• Aerodynamics is a branch of dynamics concerned
  with studying the motion of air, particularly
  when it interacts with a moving object.

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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 .

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AEROFOIL
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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.

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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.

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DRAG
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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.

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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.

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IMPACT OF GOOD AERODYNAMICS
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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?

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BICYCLE AERODYNAMICS

• Hindrance due resistance to wind resistance
• How to reduce it?

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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

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PARTS OF AIRCRAFT
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• 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.

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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

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REFERENCES-

• http//en.wikipedia.org/wiki/ImageDenney.kitfox.g
  -foxc.asp
• http//www.grc/nasa.gov/WWW/Wright/airplane/shape.
  html
• http//www.grc.nasa.gov/WWW/Wright/airplane/inclin
  e.html
• http//en.wikipedia.org/wiki/ImagePSU-90-125.PNG
• http//en.wikipedia.org/wiki/ImageLift_drag_graph
  .JPG
• Encarta encyclopedia
• Britanica encyclopedia