Answer: Hot combustion gases enter the nozzle of a

Chapter 8, Problem 871

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Hot combustion gases enter the nozzle of a turbojet engine at 230 kPa, 6278C, and 60 m/s and exit at 70 kPa and 4508C. Assuming the nozzle to be adiabatic and the surroundings to be at 208C, determine (a) the exit velocity and (b) the decrease in the exergy of the gases. Take k 5 1.3 and cp 5 1.15 kJ/kg8C for the combustion gases.

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