a turbine is to operate at 300 rpm under a net head of 400 m. if cv=0.98 what is the velocity?
EXPERT ANSWER
Given, Net head, H net = 400m
Co-efficient of velocity, Cv = 0.98
The turbine speed, N = 300rpm
Therefore, the turbine is Francis turbine
Now, Velocity, V = Cv × √(2gHnet)
V = 0.98 × √(2×9.81×400)
V = 86.82m/sec
Therefore, the velocity is 86.82m/sec