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

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Compressors, Gas Turbines and Jet Engines
In the cross compounding of the gas turbine plant

Both the arrangements can be employed
All are connected in series
H.P. compressor is connected to H.P. turbine and L.P. compressor to L.P. turbine
H.P. compressor is connected to L.P. turbine and L.P. compressor is connected to H.P. turbine

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