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FW Lew, interesting gif 's shown on your link.
You mention reversing the rotation of a vortex. We have a plexiglas test
tank used for observing the generation of a vortex by a mixer.. see www.gasmastrrr.com for a view of the vortex
pattern induced by a 3450 RPM rotating member.
Using a 3 phase motor permits us to reverse the phase and observe counter
or clockwise rotation of the vortex . Being in the northern hemisphere we
notice a difference in the spiral of the vortex when clockwise rotation is
inducing the vortex.
The dynamics of the " seething" cauldron of mixing motion produced in the
glass tank demonstrates the energy released. The vortex produced actually causes
some of the plexiglas bottom to vanish by electron action.
. A visual of the spiral vortices spun off the main vortex column can
be seen because the entrained air permits the vortices to be visible.
We have a large tank with viewing windows for tests of larger HP units ( 5- 100
HP) that we use for our continued applied research in testing " shapes"
of various vacuum induction producing units. Some of the test logs are
awesome.
For example. Aeration of wastewater in a small plant
bybubbling compressed air into the basin uses a set of 20HP blowers to produce
the required air volume to transfer oxygen in sufficent quanities to aerate
the basin over a 24 hour time frame.
We tested an air induction unit of 5HP and achieved better oxygen
transfer rate results than with the two 20HP blowers. The air induction feeder
mixer literally lifted the bottom solids up into the spiral vortex and
recirculated the entire basin water past the rotating member as it feed air at
velocity shear of 105 f/p/s. Attempts to calculate the oxygen transfer
rate we recorded via a DO analyzer was a waste of time because the empirical
data developed over time that was used to derive the math formula was in such
conflict with the DO recordings.
These years of data collected by tests of various shapes are beginning to
mature into some interesting new ideas on ultrahigh speed rotation for
inducing vortexes. Our tests to date on these high speed units have been
hindered by failures of the mechanical drives. Speeding up the rotation past
3450 RPM up to max of 10,000 RPM using sheaves and VFD drive control has
brought us a whole new set of problems with premature failure.
In thr real world of industrial products, a manufacturer like us must first
demonstrate the device will run without failure for the time it takes to
amortize the investment. As in the case of stockbrokers, the users want to
overcome the cost in under two years and in more and more cases they want a max
of 6 months recovery of costs.
All of which makes life most exciting to the designer while the
vortex mystery play moves to the next act.
Richard
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