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1. In a turbo jet engine, the momentum of the gases leaving the nozzle produces the...

1. In a turbo jet engine, the momentum of the gases leaving the nozzle produces the propulsive force. The enthalpy and velocity of the gases at the nozzle entrance are 1200 kJ/kg and 200 m/s respectively. The enthalpy of the gas at exit is 900 kJ/kg. If the heat loss from the nozzle is negligible, determine the velocity of the gas jet at exit from the nozzle.

2. For question 1, if the diameter of the nozzle at exit is 500 mm, find the mass flow rate of gas. The gas density at the nozzle inlet and exit are 0.81 kg/m3 and 0.39 kg/m3 respectively. Also determine the diameter of the nozzle at the inlet.

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