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Velocity Needed to Purge and Air Lock

Velocity Needed to Purge and Air Lock

Velocity Needed to Purge and Air Lock

(OP)
I am trying to develop a general relationship for the velocity needed to purge an air bubble from a water pipe with multiple high spots.  Any suggestions?

RE: Velocity Needed to Purge and Air Lock

The Water Pollution Control Federation Manual of Practice No. FD-4 "Design of Wastewater and Stormwater Pumping Stations" states "A minimum velocity of 1.2 m/s (4 ft/sec) is required in the pipeline to shear the bubble and keep it moving downgrade."

Hope this helps.

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