An inward flow reaction turbine has the following data: Head available = 25 m Velocity of flow = 2.5 m/s (constant) Guide blade angle = 10° Runner vanes are radial at the inlet and discharge at the outlet is radial. What will be the approximate hydraulic efficiency of the turbine? [Given: tan(10°) = 0.176, g = 10 m/s2]

A Pelton wheel having semi-circular buckets works under a head of 140 m. It runs at 600 rpm. The discharge through the nozzle is 500 L/s, and the wheel diameter is 0.6 m. The coefficient of velocity of the jet is 0.98. Find: (a) Power available at the nozzle (b) Hydraulic efficiency of the wheel

A 13,240 kW Francis turbine runs at 150 rpm under a net head of 27 m. The effective atmospheric pressure head is 10.6 m of water. The draft tube must extend at least 0.77 m below the tail race level. The maximum permissible height of a straight conical draft tube above the tail race level is approximately: