A nozzle is a device that is used to increase the velocity of a fluid by varying the cross-sectional area. At the last section of a jet engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at a pressure of 500 kPa and a temperature of 600 K enters a nozzle
A nozzle is a device that is used to increase the velocity of a fluid
by varying the cross-sectional area. At the last section of a jet
engine (Fig Q1.a, section 5), air with a mass flow rate of 50 kg/s at
a pressure of 500 kPa and a temperature of 600 K enters a nozzle
with an inlet cross-sectional area of 5 m2. The exit area of the
nozzle is 20% of its inlet area. The air leaves the nozzle at a
velocity of 300 m/s. The nozzle is not well-insulated and during
this process, 5 kJ/kg heat is lost.
Where necessary, assume air as an ideal gas and consider R = 287
J/(kg.K), Cp = 1005 J/(kg.K), Cv = 718 J/(kg.K).
Density of Air entering the nozzle already worked out as 2.9036kg/m^3
Velocity of Air entering the nozzle already worked out as 3.44m/s
Density of Air as it leaves the nozzle worked out as 166x10^3kg/m^3
(i) Determine the temperature and pressure of the air as it leaves the nozzle.
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