Download GTU BE/B.Tech 2019 Summer 6th Sem New 2160102 Fundamentals Of Jet Propulsion Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2160102 Fundamentals Of Jet Propulsion Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2160102 Date:14/05/2019
Subject Name:Fundamentals of Jet Propulsion
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


MARKS

Q.1 (a) Define thermal efficiency, propulsive efficiency and overall
efficiency of a jet engine.
03
(b) Derive thrust equation for turbojet engines. 04
(c) Derive Mach Area relation for nozzle. 07
Q.2 (a) Explain the effect of turbine temperature on performance of jet
engine.
03
(b) Explain the effect of compressor pressure ratio on performance of
jet engine.
04
(c) Compare performance of turbojet, turbofan and turboprop engines. 07
OR
(c) Write a note on Thrust augmentation techniques. 07
Q.3 (a) What is the need of inlets in a jet engine? 03
(b) Draw and explain supersonic inlets in jet engines. 04
(c) Derive maximum mass flow condition for a variable area duct. 07
OR
Q.3 (a) Derive thrust equation for a rocket engine. 03
(b) Write a note on liquid propellant rockets. 04
(c) Discuss effect of back pressure in convergent divergent nozzle. 07
Q.4 (a) Explain the types of combustion chamber in brief. 03
(b) Explain the need of a good combustion chamber. 04
(c) Briefly explain the factors affecting the design and performance of
the gas turbine engine combustion chamber.
07
OR
Q.4 (a) What do you mean by choking? When it occurs? 03
(b) Prove that Brayton cycle with regeneration improves cycle
efficiency.
04
(c) Explain the types of combustion chamber in detail. 07
Q.5 (a) Derive expression for specific thrust, specific impulse and specific
fuel consumption.
03
(b) Write a note on pulse jet engine. 04
(c) Explain in detail diffuser operations of a ramjet engine. 07
OR
Q.5 (a) Why turbine is required in a jet engine. 03
(b) Why ramjet engine does not require rotating components? 04
(c) Draw and explain importance of Brayton cycle modifications
compared to basic cycle.
07

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