a turbine is to operate at 300 rpm under a net head of 400 m. if cv=0.98 what is the velocity?

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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