Question

low-velocity steam (with negligible kinetic energy) enters an adiabatic nozzle at 580 k and 3 mpa. the steam leaves the nozzle at 2 mpa with a velocity of 400 m/s. the mass flow rate is 0.4 kg/s. determine the temperature (k) of the steam leaving the nozzle and the exit area of the nozzle in mm2 .

Answer 1

The temperature of the steam leaving the nozzle is 674.5 K, and the exit area of the nozzle is = 704.2 / 2² mm2.

let's use the conservation of mass to find the exit-specific volume of the steam:

ℎ1 = 3297.6 kJ/kg (from steam tables at 580 K and 3 MPa)

ℎ2 = ℎ1 - 1/2