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374 Gas Turbine Handbook: Principles and Practices<br />

T 5 Turbine inlet temperature, °R<br />

T 7 Exhaust gas temperature, °R<br />

T AMB<br />

Ambient air temperature, °R<br />

T EXH<br />

Turbine total exhaust temperature, °R<br />

Ti Inlet temperature, °R<br />

TIT Turbine total inlet temperature, °R<br />

T o Discharge temperature, °R<br />

U Velocity, feet per sec<br />

D Diameter, in 2 , ft 2<br />

V Vibration<br />

W Mass flow rate, lb m /sec<br />

W 2 Relative velocity<br />

W a Air flow entering the compressor, lb/sec<br />

W f Fuel flow, lb m /sec<br />

W f /CDP Gas turbine burner ratio units, lb m /hr-psia<br />

W g Turbine inlet gas flow, lb m /sec<br />

1 W 2 Work per unit mass on or by the system, ft-lb f /lbm<br />

1 W 2 /J Work, Btu/lb m<br />

Z ave Average compressibility factor of gas<br />

β 2 Relative direction of air leaving the stator vanes<br />

η c Compressor efficiency<br />

η t Gas generator efficiency<br />

η PT Power extraction turbine efficiency<br />

θ 1 Direction of air leaving the stator vanes

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