Hi all -

is there somewhere with information on the design of a venturi to
produce suction or vacuum ?

We're trying to make a vacuum cleaner using compressed air and a coaxial
venturi and figuring out how big to make the parts and what size ratio
gives the best suction is turning out to be a problem.

A google turns up tons of venturi information but I couldn't find a
design formula relating orifice size, main tube size and restriction
size along with inlet pressure or flow rate.

Any pointers would be helpful...

Thanks in advance

Carla
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