Compressors, Gas Turbines and Jet Engines
Ramjet engine

Produces a jet consisting of plasma
Is self operating at zero flight speed
Requires no air for its operation
Is not self operating at zero flight speed

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Compressors, Gas Turbines and Jet Engines
The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

Heated
Bled gas from turbine is heated and readmitted for complete expansion
Exhaust gases drive the compressor
Compressed air before entering the combustion chamber is heated

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