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Compressors, Gas Turbines and Jet Engines

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

0.1%
5%
1.0%
0.5%

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

1 - (1/r) ɣ/ɣ-1
1 - r ɣ-1
1 - (1/r) ɣ-1/ɣ
r ɣ-1

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

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

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Compressors, Gas Turbines and Jet Engines
A centrifugal compressor works on the principle of

Conversion of pressure energy into kinetic energy
Centripetal action
Generating pressure directly
Conversion of kinetic energy into pressure energy

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Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Pressure ratio
Maximum cycle temperature
All of these
Minimum cycle temperature

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

0.50069444444444
3.5 : 1
0.20902777777778
0.33402777777778

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