the available power from the physical environment. 2 the flow rate 3 the inlet angle of the rotor blades 4 the exit diameter of the draft tube 5 the head losses in the guide vanes, the rotor (points 1 to 3) and the draft tube.
The shaft of a Francis turbine rotates at 300rpm.It delivers 3.4MW under an effective pressure head of 47m and the overall efficiency is 81% and hydraulic efficiency 89%.The inlet to the rotor is 1.55m above the tail race water level and the pressure head there is 26m.The suction pipe inlet is 1.25m above the tail race level and the pressure there is - 2.3m.The turbine is operated for maximum power. The water enters the draft tube at 6.1m/s and leaves it at 3.5m/s. The outer diameter of the rotor is 1.48m and the velocity of flow is constant at 6.5m/s.
Determine
1 the available power from the physical environment.
2 the flow rate
3 the inlet angle of the rotor blades
4 the exit diameter of the draft tube
5 the head losses in the guide vanes, the rotor (points 1 to 3) and the draft tube.
Step by step
Solved in 2 steps with 2 images
