Absolute velocity

ABSOLUTE VELOCITY A003

This is a term used in pump theory. Any time we measure the fluid flow in a pipe, the pump volute, or by the impeller vane the measurement is in reference to an earthbound coordinate system.

The term “relative velocity” uses the rotating vane as its coordinate system. It is calculated by dividing the relative flow per vane channel by the cross section of the channel area.

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  • On February 13, 2018