Question

A nozzle is a device for increasing the velocity of a steadily flowing stream. At the inlet to a certain nozzle, the enthalpy of the fluid passing is 3000 kJ/kg and the velocity is 60 m/s. At the discharge end, the enthalpy is 2762 kJ/kg. The nozzle is horizontal and there is negligible heat loss from it. Calculate:
a. The velocity of the fluid at the exit

Answer 1

From the conservation of energy:

$$h_1+0.5v_1^2=h_2+0.5v_2^2$$

$$3000\cdot 10^3+0.5(60)^2=2762\cdot 10^3+0.5v_2^2$$

$$v_2=692.5\frac{m}{s}$$