Question

Steam enters an adiabatic nozzle at 1 MPa, 250°C, and 30 m/s. At one point in the nozzle the enthalpy dropped 40 kJ/kg from its inlet value. Determine velocity at that point. (A) 31 m/s (B) 110 m/s (C) 250 m/s (D) 280 m/s

Answer 1

284.4 m/s

Step-by-step explanation:

At the inlet of the nozzle P =1 atm.

Temperature T = 250° C

Velocity of the steam at the inlet V_1 = 30 m/s

Change in enthalpy Δh = 40 KJ/kg

let V_2 be the final velocity

then

`V_2 =√(2\Delta h+V_1^2) \\=√(2*40+30^2)\\= 284.4 m/s`