JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Overview and Introduction: Historical developments and trends, fundamentals of fluid mechanics, flow phenomenon related to vehicles, external and internal flow problem, resistance to vehicle motion, Mechanics of air flow around a vehicle, pressure distribution, Aerodynamic forces, Vehicle drag and types, side and lift forces, cars as a bluff body, flow field around car, performance potential of vehicle aerodynamics.

UNIT - II

Aerodynamic Drag and Shape Optimization of Cars: Cars as a bluff body, flow field around a car, analysis of aerodynamic drag, drag coefficient of cars, strategies for aerodynamic development, low drag profiles. Front end modification, front and rear wind shield angle, boat tailing, hatch back, fast back and square back, dust flow patterns at the rear. Effect of rear configuration, effect of fasteners

UNIT - III

Vehicle Handling and Stability: Origin, characteristics and effects of forces and moments on a vehicle, lateral stability problems, vehicle dynamics under side winds-dirt accumulation on the vehicle, wind noise- Mechanisms and generation design features, measurement and techniques.

UNIT - IV

Race Car Aerodynamics: Basic vehicle body concepts, aerodynamics of the complete vehicle, flow over wheels, sliding seal, and skirts, under body channels, simple add ons: spoilers, strakes and wickers, internal flow, Race car wings, most current examples in detail- design, aerodynamic behavior, and flow field.

UNIT - V

Measurement and Test Techniques: Wind tunnel- scope, Fundamental techniques, simulation limitations, prototype tests, wind tunnel types and testing methods, Test techniques- scope, measuring equipment and transducers, road testing methods.

TEXT BOOKS:

• 1. Wolf- Heinrich Hucho, Aerodynamics of Road vehicles, SAE International 1998 A. Pope- “Wind Tunnel Testing”- John wiley & sons- 2nd Edition, New York- 1974
• 2. Katz, J., Race Car Aerodynamics Designing for Speed, Bentley Publishers

REFERENCES:

• 1. Automotive Aerodynamics: Update SP-706- SAE- 1987
• 2. Vehicle Aerodynamics – SP-1145- SAE-1996 R16 B.TECH AERONAUTICAL ENGG. B.TECH. AERONAUTICAL ENGINEERING