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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The compressor efficiency is the

Total output/air input
Isothermal H.P./shaft H.R
Isothermal H.P/indicated H.R
Compression work/motor input

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Compressors, Gas Turbines and Jet Engines
A simple turbojet engine is basically

A propeller system
Gas turbine engine equipped with a propulsive nozzle and diffuse
Ramjet engine
Chemical rocket engine

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation

5%
0.1%
0.5%
1.0%

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Compressors, Gas Turbines and Jet Engines
The axial flow compressor is preferred in aircraft gas turbines because of

None of the listed here
Higher thrust
High pressure rise
Low frontal area

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Compressors, Gas Turbines and Jet Engines
The degree of reaction is usually kept ________ for all types of axial flow compressors.

0.2
0.5
0.4
0.3

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Compressors, Gas Turbines and Jet Engines
The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

Pressure ratio
None of these
Compression ratio
Work ratio

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