3. Feeder propellers

Reminders

As the subject is entirely focused on cavitation (passage into the vapour phase of a small fraction of the liquid being pumped) and pump suction capacity, the reader will find it useful to refer to article BM 4 313 [23].

To help you understand the presentation, we'll remind you of 3 definitions.

• (Net Positive Suction Head)NPSHavailable: this is the net suction head of the pump. We refer to it as NPSHd. It is equal to:NPSHd = (p _ta - p _V...