Talk-Polywell.org

http://www.livescience.com/technology/0 ... n-fan.html

This doesn't look like it would have any applications to engine design, does it?

Interesting application of entrainment.
Love the "Bladeless" Marketing approach...nice how Dyson glosses over the hidden impeller blades in the base.

Be interesting to see the device in action in a liquid vice gaseous medium.
Probably impeller cavitation would limit its effectiveness, not to mention where in the system you would draw the working fluid from, a reservoir or upstream...
Might be a neat trick for a Jacuzzi jet.
No such thing as a free lunch.

Edit: corrected bad typing for lunch.

Not even entertaining in my point of view, just some commercial blabbering.

Anular wings (or ring wings) are around since the understanding of the concept of "wing" itself, and have been discussed and analyzed plently.
No new phisics or invention here, just the old Bernoulli principle in action.

Probably the sales of Dyson vacuum machine is not going so well this year...

I think it is a neat fan. It should be quiet and reasonably easy to clean. Fifteen times the air flow probably means only one fourth the air velocity but that could work.

Interesting. But interesting enough for $300?

A similar air entrainment concept has been marketed for quite a while...

https://secure.vortec.com/store_products.php?catID=14

Powered by compressed air. A typical use is removal of welding fumes.

kunkmiester wrote:http://www.livescience.com/technology/0 ... n-fan.html

This doesn't look like it would have any applications to engine design, does it?

http://www.flodesign.org/pdf/AIAA20020230.pdf

They had a newer jet/rocket air-augmented nozzle design using cascaded, fluted rings of increasing diameter, but I can't find it anymore. FloDesign seems to now be concentrating on wind turbines.

I was thinking a series of these could be used instead of a compressor in a jet. I just wasn't sure how efficient they'd be--you could use bleed air/exhaust air off the primary turbine to run the rings, but after reading the article, I didn't think it'd work. Interesting idea, which was obviously interesting to some of the people here(half the point), but not feasible for more than a novelty fan.