"Bob La Londe" fired this volley in news:yyN9r.4410
:

I am looking at various air volume increaser jets etc.

You don't need volume (well... within limits), you need a combination of
high velocity and expansion from the feed line.

A high-velocity lamilar jet of air will carry a prodigious amount of
ambient air along with it, but most of the goal is to get it to impinge
directly in the cut zone, then do most of its expansion work there. If
the velocity isn't high enough, the expansion occurs before the stream
gets to the work.

LLoyd