Aerodynamics ppt

7/24/2019 Aerodynamics ppt

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AERODYNAMICS IN CARS


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INTRODUCTION

AERODYNAMICS:

Study of forces generated by motion of air on moving body.

CLASSIFACATION OF AERODYNAMICS:external and internal subsonic su!ersonic "y!ersonic

FIELDS OF APPLICATION:

aeros!ace engineering design of automobiles s"i!s civil

engineering design of bridges etc.


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AERODYNAMIC FORCES ON A BODY

LIFT

(DOWNFORCE)

DRAG

WEIGHT

THRUST


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HISTORY OF EVOLUTION OF


Design in earlier 20thcentur:

cars #it" lo# s!eeds no aerodynamic !roblems.

Car in earlier !0"s:

cars designed for big family$s com!lete negligence

of aerodynamics.

Car a#ter $0"s:

fuel crisis need of economic designs evolution of aerodynamics.


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%&Y %E NEED TO IMPRO'E


SPEED

better aerodynamics "ig"er #ill be t"e s!eeds.

F(EL EFFICIENCY

better aerodynamics less #or% for engine.


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AERODYNAMICS IN MCLARENF1

FRONT END

REAR END

SCOOPS

%IN)S

Mclaren F1


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FRONT END

FRONTAL PRESSURE

PRESSURE DIFFERENCE

MINIMISE FRONTAL AREA

Back


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SCOOPS

ENGINE COOLING

INCREASES FLOW

RATE OF AIR

Back


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REAR END

REAR VACUM

FLOW DETACHEMENT

TURBULANCE

Back


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WINGS

PRODUCEDOWNFORCE

REDUCE DRAG

Back


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AERODYNAMIC DEVICES

SPOILERS

NACA DUCTS Nationa A!"i#o$%Co&&itt'' o$ A'$onati*# (NACA)+t,' -$'*$#o$ to NASA+ in 1./0

In*$'a#' $at' o o2To '3-o#' ai$ to a$'a# not '3-o#'! to

!i$'*t ai$ o24


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Back


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COEFFICIENT OF DRAG

D$a56 1783! 3 C! 3 A9"2

M'a#$' oa'$o!%na&i*

':*i'n*%4


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METHODS TO EVALUATE


WIND TUNNELS; R'#'a$*, too to #t!% ''*t4;T$ia an! '$$o$ -$o*'##4

; S-'*ia -$'##$' -aint# o$ ana%#i#4

; D'tai'! ana%#i# o ai$ o2 -att'$n#4; Ana%?in5 o$ t,' o-ti&a !'#i5n4


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Aerodynamics ppt