Question

In a turbo machine handling an incompressible fluid with a density of 1000 kg/m³ the conditions of the fluid at the rotor entry and exit are as given below:

	Inlet	Exit
Pressure	1.15 MPa	0.05 MPa
Velocity	30 m/s	15.5 m/s
Height above datum	10 m	2 m

If the volume flow rate of the fluid is 40 m3/s, estimate the net energy transfer from the fluid as work.

Answer 1

By S.F.E.E.

Flow rate = 40 m³/s ≡ 40 × 1000 kg/s = w (say)