a ppt on aerodynamics in cars

AERODYNAMICS IN CARS

by,

HABEEB MUHAMMED.A

ROLL NO : 15

S8 ME

INTRODUCTION

AERODYNAMICS :

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

CLASSIFACATION OF AERODYNAMICS :

external and internal, subsonic , supersonic , hypersonic

FIELDS OF APPLICATION :

aerospace engineering, design of automobiles , ships , civil

engineering , design of bridges etc.

AERODYNAMIC FORCES ON A BODY

LIFT

(DOWNFORCE)

DRAG

WEIGHT

THRUST

HISTORY OF EVOLUTION OF AERODYNAMICS IN CARS

DESIGN’S IN EARLY 20th CENTURY : cars with low speeds, no aerodynamic problems.

CAR’S IN THE EARLY 50’s : cars designed for big family’s , complete negligence of aerodynamics.

CARS AFTER 70’s : fuel crisis , need of economic designs , evolution of

aerodynamics.

WHY WE NEED TO IMPROVE AERODYNAMICS IN CARS

SPEED better aerodynamics higher will be the speeds.

FUEL EFFICIENCY better aerodynamics , less work for engine.

AERODYNAMICS IN MCLAREN F1

SPECIFICATIONS

FRONT END

REAR END

SCOOPS

WINGS Mclaren F1

AERODYNAMIC DEVICES

SPOILERS

NACA DUCTS Increase rate of flow To expose air to areas not exposed to

direct air flow.

METHODS TO EVALUATE AERODYNAMICS IN CARS

WIND TUNNELS • Research tool to study effect of air

moving over a solid object.• Trial and error process.• Special pressure paints for analysis.• Detailed analysis of air flow patterns.• Analyzing for the optimal design.

SOFTWARES

DEVELOPMENTS IN CFD ANSYS, CATIA,ALIAS STUDIO ANALYZE CHANGES DURING DESIGN

PHASE AND DEVELOPMENT REDUCES TIME TO DEVELOP

OPTIMAL DESIGN ABLE TO STUDY INDIVIDUAL

ELEMENTS, MORE EFFECTIVE

AERODYNAMIC IMPROVEMNTS IN THE CAR THAT WE ALREADY OWN

Keep your vehicle washed and waxed Remove mud flaps behind wheels Place license plate out of air flow Avoid roof-racks or carriers Close windows, close sunroof

CONCLUSION

Aerodynamics in cars is a factor in the over all performance of the car, it should never be compromised.

THANK YOU

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FRONT END

FRONTAL PRESSURE PRESSURE DIFFERENCE MINIMISE FRONTAL AREA REDUCE cd

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SCOOPS

ENGINE COOLING INCREASESFLOW

RATE OF AIR

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REAR END

REAR VACUM FLOW DETACHEMENT TURBULANCE

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WINGS

PRODUCE DOWNFORCE

REDUCE DRAG

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COEFFICIENT OF DRAG

Drag = 1/2xd x Cd x A Xv2

Measure of aerodynamic

efficiency.

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SPECIFICATIONS

EngineType:V12 Curb Weight : 1100 kg. Displacement:6064 cc Horsepower:627 bhp @ 7400 rpm Torque:479 lb-ft @ 4000 rpm Performance0-60 mph:3.2 sec 0-100 mph:6.3 sec Top Speed:240 mph /hr

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