The document provides an introduction to automotive aerodynamics, detailing the four main forces acting on a vehicle: lift, drag, weight, and thrust. It discusses the impact of aerodynamic drag on engine performance and offers design tips to improve a vehicle's aerodynamics, such as keeping it low to the ground and smoothing its shape. Benefits of improved aerodynamics include enhanced efficiency, speed, stability, and aesthetic appeal.

1. Automotive
Aerodynamics

2. Introduction
When objects move through air, forces
are generated by the relative motion
between air and surfaces of the body,
study of these forces generated by air is
called aerodynamics.

3. Forces on a Automotive Body
Four kinds of forces may act on a body:
 Lift
 Drag
 Weight
 Thrust

4. Forces on a Automotive Body
Four kinds of forces may act on a body:
 Lift
 Drag
 Weight
 Thrust

5. Lift
It is the sum of all the dynamic forces
on a body normal to the direction of
external flow around the body.
F=(1/2)CLV2A ρ
Drag
It is the sum of all the dynamic forces
in the direction of fluid flow, so it acts
opposite to the direction of object.
F=(1/2)CDV2A ρ

6. Weight
Its just the weight of the object in
motion. It affects the acceleration of the
object.
Thrust
Force produced in the opposite
direction to drag that is higher than drag
so the body can move through the
fluid(air).

7. History
Today’s Car

8. Effect of Aerodynamic Drag on
Engine Performance

9. Aerodynamics Design Tips
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Keep the vehicle low to ground.
Cover the wheel wells.
Avoid open Areas
Make corners round instead of sharp.
The body should be as smooth and
continuous as possible.
The should be no sharp angles.

10. Aerodynamics Design Tips
Front screen should be raked as much as
is practical.
 All body panels should have a minimal
gap.
 Make use of spoilers.
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11. For Vehicle you Already own
Keep your vehicle washed and waxed
(reduces skin friction).
 Remove mud flaps from behind the
wheels.
 Add a spoiler to the front or rear of the
car.
 Drive in closed sun roof and windows.
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12. Benefits of Aerodynamically
designed Vehicle
More Efficiency
 More Speed (increased performance)
 More stability (even at higher speeds)
 Good Looking (Design Improvements)
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