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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Ratio of indicated h.p. to shaft h.p. in known as

Isothermal efficiency
Mechanical efficiency
Volumetric efficiency
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of

0.045833333333333
0.16736111111111
0.042361111111111
0.084027777777778

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Compressors, Gas Turbines and Jet Engines
Stalling of blades in axial flow compressor is the phenomenon of

Motion of air at sonic velocity
Unsteady periodic and reversed flow
Air stream not able to follow the blade contour
Air stream blocking the passage

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Compressors, Gas Turbines and Jet Engines
The clearance volume of the air compressor is kept minimum because

It results in minimum work
It permits isothermal compression
It allows maximum compression to be achieved
It greatly affects volumetric efficiency

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Compressors, Gas Turbines and Jet Engines
Free air is the air at

20°C and 1 kg/cm² and relative humidity of 36%
0°C and standard atmospheric conditions
15°C and 1 kg/cm²
Atmospheric conditions at any specific location

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Compressors, Gas Turbines and Jet Engines
The thermodynamic efficiency of rotary compressor is based on

Isothermal compression
Isentropic compression
Polytropic compression
Adiabatic compression

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