Compressors, Gas Turbines and Jet Engines
Clearance volume in actual reciprocating compressors is essential

To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
To attain high volumetric efficiency
To accommodate Valves in the cylinder head
To provide cushioning effect

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Compressors, Gas Turbines and Jet Engines
In the axial flow gas turbine, the work ratio is the ratio of

Actual compressor work and theoretical compressor work
Output and input
Actual total head temperature drop to the isentropic total head drop from total head inlet to static head outlet
Compressor work and turbine work

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