On Wed, 17 Sep 2008 23:58:27 -0700, Carla Fong
wrote:

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
Skilled politicians, like high-end hookers, are only for those who can
afford them. Michael Pearce


Is this what you're looking for?

http://www.spenroaircrafttool.com/sp...uum-p-217.html

Bob