Physics · Fluid Mechanics
For a Francis turbine, the condition for maximum hydraulic efficiency is met when:
- 1The relative velocity of water is radial at the runner outlet
- 2The absolute velocity of water is radial at the runner outlet✓
- 3The guide vanes are set at an angle of 90°
- 4The runner blade tips are radial at the outlet
Correct answer
The absolute velocity of water is radial at the runner outlet
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