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Tuesday, October 18, 2016







Roll No

Automotive Aerodynamics
AE-316


Time Allowed: 3 Hours.                                                       Maximum Marks - 60


Instructions to Candidates:
1. Section A is compulsory.
2. Attempt any 4 Questions from Section B and Attempt any 2 questions from Section-C.


Section -A                                                   (1ox2=20 Marks)
Q.1
a)  what are the characteristics of external flow on a body?
b) On what parameters drag on a body depends?
c) What do you mean by a bluff body?
(1) What is the importance of weight to power ratio of a car?
e) Name all the forces and moments acting on a vehicle
f) On what parameters engine performance is dependent to overcome the vehicle drag. Write the appropriate equation.
g) What are the recommended velocities for change in gears of a vehicle?
h) Write the relation between top speed aerodynamic drag and engine power of a vehicle.
i) What do you mean by induced drag and aspect ratio of a vehicle?
j) Name the various parts of a wind tunnel.

Section - B

Q2 Define a boundary layer and differentiate between laminar and turbulent boundary layer and show their velocity profiles also.
Q.3 Show the type of External drag and internal drag of the typical car and explain sources of various types of drag.
Q.4 Explain in details the optimization analysis of rear end, Hatch back and square back of a vehicle.
Q.5 Explain the features of aerodynamic stability of a vehicle and describe the effect of wind forces resulting from non-steady side winds on a vehicle.
Q.6 Explain the limitations of simulation for a road vehicle with the help of neat Sketches.


Section -C
Q.7 Explain in details about
a) Large full-scale wind tunnels
b) Small full-scale wind tunnels
c) Climatic tunnels
Q.8 Explain the behavior of attached flow, Re-attached air flow and 3-D vortex
Separation on the motion of a road vehicle
Q.9 Discuss the effect of aerodynamic noise, Aeroclastic effects and transport of solids on the motion of a road vehicle.



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