Physics · Hydraulic Turbines
In reaction turbine applications, what is the primary function of a divergent (tapered) draft tube compared to a straight cylindrical one?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It increases the absolute velocity of water as it leaves the turbine
- 2It completely eliminates cavitation under reduced discharge conditions
- 3It prevents water hammer blows and surges in the tailrace
- 4It converts a greater portion of the kinetic head at the runner exit into useful pressure head✓
Correct answer
It converts a greater portion of the kinetic head at the runner exit into useful pressure head
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