Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Total adiabatic temperature drop
Total temperature drop
Adiabatic temperature drop in the stage
Total temperature drop in the stage

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

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

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