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

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

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Compressors, Gas Turbines and Jet Engines
An ideal air compressor cycle with clearance on P-V diagram can be represented by following processes

Two adiabatic and two isobaric
One adiabatic, one isobaric and two constant volumes
One adiabatic, two isobaric, and one constant volume
Two adiabatic, one isobaric and one constant volume

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