• AERODYNAMICS OF CAR by

KRITIK ARYA B.TECH ME-3RD YEAR

1442340028

INTRODUCTION

• Aerodynamics is the study of how air flows under , over , and around an object to increase all the aspects of car like speed , efficiency , stability , look.

• Performance of your car = Aerodynamics styling

Forces on Car Body• Four kinds of forces may act on a car body:

• Lift

• Drag

• Weight

• Thrust your car behaves like airofoil.

LIFT It is the sum of all the dynamic forces on a body normal to the direction of external flow around the body. DRAG It sum of all the dynamic forces in the direction of fluid flow , so its act opposite to the direction of object.

weight Its just the weight of object in motion . It affects the acceleration of the object.

Thrust Force produced in the opposite direction to drag that is higher than drag force so that the body can move through the fluid (air).

Unstable supercharged car due to lack of aerodynamics style .

Logic behind this car • Air fills inside the car body from front section which

causes the lift .

• Lift force is greater than down force working on car body from front section .

• Centre of gravity shifted towards back side of body.

History

• This Car is a typical 1900s sports car .

Less aerodynamics causes low speed.

This car is 2000s hybrid super sports car .Best aerodynamics like airofoil causes high speed.

Effects of aerodynamics on engine performance

• power transmitted by the engine losses up to 25% due to lack of aerodynamics shape of the car .

• To we can increase the power up to 25% by making a perfect aerodynamic styling of body of car

Aerodynamic design tip:• Keep the vehicle low to ground.• Cover the wheel wells .• Avoid open area .• Make corner round instead of sharp .

• The body should be as smooth and continuous as possible.

• There should be no sharp angles.

Aerodynamic design tips.• Front screen should be racked as much as possible .

• All body panels should have minimum gap.

• Make use of spoilers .

For vehicle you already own.• Keep your vehicle washed and waxed (reduces skin factors)

• Remove mud flaps from behind the wheels.

• Add a spoiler to the front and rear of the car.

• Drive in closed sun roof and windows .

Benefits of aerodynamically designed car:

• More efficiency

• More speed (increased performance )

• More stability (even at higher speeds)

• Good looking (design improvement )

thanks you