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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler’s work is known as

Compressor efficiency
Isentropic efficiency
Pressure coefficient
Euler

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Compressors, Gas Turbines and Jet Engines
Turbofan engine employs

One air stream
Solid fuel firing
No air stream
Two or more air streams

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Compressors, Gas Turbines and Jet Engines
In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to

0°C and 1 kg/cm²
Intake temperature and pressure conditions
N.T.P. conditions
20°C and 1 kg/cm²

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Compressors, Gas Turbines and Jet Engines
The thrust of a jet propulsion power unit can be increased by

Burning fuel after gas turbine
Injecting water into the compressor
Injecting ammonia into the combustion chamber
All of these

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Compressors, Gas Turbines and Jet Engines
As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

First increases and then decreases
Increases
Decreases
Remain same

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Compressors, Gas Turbines and Jet Engines
With the decrease in compression ratio, the volumetric efficiency

Increases
First decrease and then increase
Decreases
Does not change

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