Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and isentropic heat drop
Actual heat drop and isentropic heat drop
Net work output and heat supplied
Net work output and work done by turbine

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor with clearance volume

Decreases with increase in compression ratio
Increases with increase in compression ratio
May increase/decrease depending on compressor capacity
In not dependent upon compression ratio

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