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Code: 13A03805
B.Tech IV Year II Semester (R13) Advanced Supplementary Examinations July 2018
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GAS TURBINES & JET PROPULSION
(Mechanical Engineering)
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Time: 3 hours
Max. Marks: 70
PART - A
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(Compulsory Question)
Answer the following: (10 X 02 = 20 Marks)
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- (a) Sketch open cycle and closed cycle gas turbine engine.
- (b) List the gas turbine applications.
- (c) Explain the basic principles of gas turbine.
- (d) What is meant by intercooling?
- (e) What is meant by thrust augmentation?
- (f) Define propulsion efficiency.
- (g) What is ramjet engine?
- (h) List the advantages of rocket engine.
- (i) What is plasma arc propulsion?
- (j) Explain expansion nozzles.
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PART - B
(Answer all five units, 5 X 10 = 50 Marks)
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UNIT - I
2 A gas turbine operates between pressure limits of 1.03 kg/cm² and 5.0 kg/cm². The inlet air temperature
to the compressor is 15°C and the air entering the turbine is at a temperature of 537°C. If the volume rate
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of air entering the compressor is 1400 m³/min, calculate the net available power output for the cycle.Assume that the cycle operates under ideal conditions. Also calculate efficiency.
OR
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3 What is work ratio? Show that work ratio is given
Wratio = 1
r-1/r (TpT01/ncnt T03)
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UNIT - II
4 Derive the condition for maximum output of a gas turbine using reheater and regenerator.
OR
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5 Explain the following with a sketch:
(a) Turboprop engine.
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(b) Turbofan engine.
UNIT - III
6 Derive an expression for propulsive efficiency of turbo jet engine.
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OR
7 Write a detailed notes on thrust augmentation and afterburner.
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UNIT - IV
8 Explain in detail liquid and solid propellants.
OR
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9 Explain with a neat sketch the following:
(a) Pulse jet.
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(b) Serquejet.
UNIT - V
10 Discuss the possibility of rocket powdered vehicle having a flight velocity greater than the exhaust
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velocity of the rocket motor.OR
11 Explain with a neat sketch Ion Rocket Engine.
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