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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to internal combustion engine

Has more efficiency
Can be driven at a very high speed
All of the listed here
Produces uniform torque

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Compressors, Gas Turbines and Jet Engines
Pressure ratio in gas turbines is the ratio of

Highest pressure to exhaust pressure
Compressor pressure ratio
Pressures across the turbine
Inlet pressure to exhaust pressure

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

p₁ p₂ = p₃ p₄
p₁ p₃ = p₂ p₄
p₃/p₁ = p₄/p₂
p₂/p₁ = p₃/p₂ = p₄/p₃

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Compressors, Gas Turbines and Jet Engines
In a closed cycle gas turbine, the air is compressed

Isothermally
None of these
Isentropically
Polytropically

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

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

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

30: 1
15: 1
7: 1
50: 1.

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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