A twin-shaft turbofan engine, with an unmixed exhaust, has the fan driven by the LP turbine and the compressor driven by

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A Twin Shaft Turbofan Engine With An Unmixed Exhaust Has The Fan Driven By The Lp Turbine And The Compressor Driven By 1 (109.05 KiB) Viewed 29 times

A twin-shaft turbofan engine, with an unmixed exhaust, has the fan driven by the LP turbine and the compressor driven by an HP turbine. Find the values under sea-level static conditions where the ambient pressure and temperature are 1.0 bar and 288 K. The following data apply to the engine: Overall pressure ratio :- 27 Fan pressure ratio :- 1.7 Bypass Ratio :- 4.5 Turbine inlet temperature :- 1460 K Fan Polytropic efficiency :- 0.89 Compressor Polytropic efficiency :- 0.9 Turbine Polytropic efficiency (HP) :- −0.93 Turbine Polytropic efficiency (LP) :- 0.91 Isentropic efficiency of intake :- 0.95 Isentropic efficiency of each propelling nozzle :- 0.93 Mechanical Efficiency of each spool :- 0.99 Combustion chamber loss :- 4% of compressor delivery Combustion Efficiency :- 0.995 Total air mass flow :- 802 kg/s Give the values of the following a) The fan exit total temperature b) The cold nozzle exhaust flow velocity c) The cold nozzle thrust d) The combustor inlet total temperature e) The combustor outlet total temperature f) The HP turbine exit total temperature g) The LP turbine exit total temperature h) HP turbine pressure ratio i) LP turbine pressure ratio j) The hot nozzle exhaust flow velocity k) The hot nozzle thrust l) The total thrust