Compressors, Gas Turbines and Jet Engines
In the aircraft propellers

Propulsive matter is ejected from within the propelled body
All of these
Its functioning does not depend on presence of air
The propulsive matter is caused to flow around the propelled body

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Compressors, Gas Turbines and Jet Engines
An ideal air compressor cycle without clearance on P-V diagram can be represented by following processes

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

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