Engineering Thermodynamics
The index of compression ‘n’ tends to reach ratio of specific heats ‘y’ when

Process is isentropic
Process is isothermal
Flow is uniform and steady
Process is isentropic and specific heat does not change with temperature

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Engineering Thermodynamics
The work ratio of a gas turbine plant is given by

(Net work output)/(Work-done by the turbine)
(Actual temperature drop)/(Isentropic temperature drop)
(Isentropic increase in temperature)/(Actual increase in temperature)
(Net work output)/(Heat supplied)

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