PTU B.Tech Aerospace Engineering 5th Semester May 2019 60523 AIRCRAFT PROPULSION II Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 5th Semester Aerospace Engineering

Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech. (ANE) (Sem.?5)
AIRCRAFT PROPULSION-II
Subject Code : ANE-314
M.Code : 60523
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION?A
Q1.
Answer briefly :

a) Define under expanded nozzle.

b) Define polytropic efficiency.

c) Define propellant burning rate.

d) Define specific impulse in a rocket engine.

e) Define effective exhaust velocity of a rocket.

f) Define work done factor for an axial flow compressor.

g) Define blade loading coefficient for an axial flow turbine.

h) Define a trivial flow.

i) Define internal efficiency of a rocket propulsion system.

j) Define gross thrust coefficient for a nozzle.


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SECTION?B
Q2.
Describe fanno flow in details.
Q3.
Explain the working of an axial flow compressor with the help of velocity triangles.
Q4.
Write early history of rocket flights.
Q5.
Explain the working of a solid rocket motor with the help a neat figure. Draw any two
grain configurations.
Q6.
Describe subsonic inlets with the help of neat figures.
SECTION?C
Q7.
Discuss simple flows in details.
Q8.
Explain the working of subcritical and supercritical supersonic inlets, with the help of
neat figures.
Q9.
The following particulars relate to a single stage turbine of free vortex design :

Inlet total-head temperature
=1000?K

Inlet total head pressure
= 3.8 Kgf/cm2

Static head efficiency
= 88%

Nozzle efficiency
= 96%

Outlet static pressure
= 1.2 Kgf/cm2

Outlet velocity
= 280 m/sec.

Blade speed at root
= 277 m/sec.

If there is outlet swirl and the turbine is designed for impulse conditions at the root
radius, find the work output.


NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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