Isentropic flow through the nozzle:
In an isentropic flow through the nozzle, air flows at rate of 600Kg/hr. At inlet to the nozzle, the pressure is 2Mpa and temperature is 1270C. The exit pressure is 0.5Mpa. If the initial air velocity is 300m/sec. Determine the following
(i) Exit velocity of air, and
(ii) Inlet and exit area of nozzle.
Sol:
Rate of flow of air mf = 600Kg/hr
Pressure at inlet P_{1 } = 2MPa
Temperature at inlet T_{1} = 127 + 273 = 400K
Pressure at exit P_{2} = 0.5MPa
Velocity at inlet V_{1} = 300m/sec
Let the velocity at exit = V_{2}
And inlet and exit areas be A_{1} and A_{2}
Applying SFEE between the section 1 - 1 & section 2 - 2