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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The compression ratio in a gas turbine is of the order of

0.33402777777778
3.5 : 1
0.50069444444444
0.20902777777778

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Compressors, Gas Turbines and Jet Engines
A rocket engine for the combustion of its fuel

Uses surrounding air
Does not require oxygen
Uses compressed atmospheric air
Carries its own oxygen

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

The ratio of stroke volume to clearance volume
Reciprocal of compression ratio
Index of compressor performance
The ratio of the air actually delivered to the amount of piston displacement

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

(p₁ - p₂)/2
p₁ p₂
p₁/p₂
(p₁ + p₂)/2

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Compressors, Gas Turbines and Jet Engines
For perfect intercooling in a two stage compressor

p₁/p₃ = p₂/p₁
p₁ = p3
p₂/p₁ = p₃/p₂
p₁ = p₂ p3

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Compressors, Gas Turbines and Jet Engines
Mining industry usually employs following motive power

Diesel engine
C. electric motor
Petrol engine
Compressed air

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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