Physics · Fluid Mechanics

Which of the following expressions gives Thoma's cavitation factor (σ), which is used to determine whether cavitation will occur in any portion of a turbine? (Where H a = atmospheric pressure head, H v = vapour pressure head, H s = suction pressure head, and H = working head of the turbine).

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

H a - H v - H s H

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Which of the following expressions gives Thoma's cavitation factor (&sigma;), which is used to determine whether cavitation will occur in any portion of a turbine? (Where H a = atmospheric pressure head, H v = vapour pressure head, H s = suction pressure head, and H = working head of the turbine).