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A Turbojet-engined aircraft flies at 350m/s at an altitude of 9000 m. The pressure at this...

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Mechanical Engineering

A Turbojet-engined aircraft flies at 350m/s at an altitude of9000 m. The pressure at this height is 30 kPa and the temperatureis-32⁰ C. The pressure ratio of the compressor is 12, the turbineinput temperature is 1400 K. Air enters the compressor with a flowof 60 kg/s and the heat value of the fuel is 42 700 kJ/kg.Admitting that adiabatic efficiency of compressor, turbine and Luleis 100% and specific temperatures are constant at roomtemperature,
a) The speed at which the combustion end gases exit theengine,
b) Reaction force,
c) Calculate the amount of fuel consumed in Unit time. (k=1.4Cp=1.005 kj/kgK )

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