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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