LordOfLA
Godlike!
- Joined
- 2 Feb 2004
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- 7,026
How it works
Air is accelerated through an annular aperture. This creates a jet of air that passes over a 16° airfoil-shaped ramp, channeling its direction
Up to 5.28 gallons of air per second is drawn in by an energy-efficient, brushless motor. A combination of the technologies used in turbochargers and jet engines generates powerful airflow.
1
Air is drawn in
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Air is accelerated
Airflow is accelerated though an annular aperture. It passes over a 16° airfoil-shaped ramp, which channels its direction. 3
Air is induced
Air behind the Dyson Air Multiplier™ fan is drawn into the airflow, through a process known as inducement.
4
Air is entrained
Air around the machine is also drawn into the airflow, through a process known as entrainment, amplifying it 15 times.
Dyson engineers started with pressurized air, forcing it through narrow apertures to create jets. But they needed it to be more powerful to work in a fan. The breakthrough came when they noticed that accelerating air over a ramp amplified it by 10 – 20 times, drawing in surrounding air through processes known as inducement and entrainment. Hundreds of iterative tests revealed the ideal ramp angle, aperture width and loop amplifier dimensions.
Then came the problem of air intake – the motor had to suck in more than 20 litres of air per second to generate a powerful enough jet. A 3D impellor was required. Its nine asymmetrically-aligned fins have rows of tiny holes to reduce the friction caused by colliding high and low air pressure – birds of prey balance air pressure around their wings in a similar way.
If it's a fan then why, when watching the reactions video, are the people's hair or clothing not moving at all?
I explained it perfectly when I exptrapolated even before I read their tortured explanation;Gizmodo had a review of it.... and they seemed to like pretty much everything about it except the price.... and they seem to go a bit into detail how it works... or at least explain it a bit better.
Dyson Air Multiplier Review: Making a $300 Fan Takes Cojones - Dyson air multiplier - Gizmodo
cool!!!!
but I'm trying to figure something out;
what the hell does "accelerated" mean?
from what I'm reading, there are blades they are just somewhere else, the air is then driven through a compressor of some sort so the air is regulated when released to not pulse
this looks incredibly inefficient to me if my extrapolation is correct
[edit]
futher exploration, it seems my extrapolation is spot on;
"drawn in" means pumped somehow and turbo chargers do have blades, so do jet engines
they go on;
nothing is produced from nothing, air isn't "amplified" from whole cloth, that has to be using energy or losing velocity or suffer some other loss to be physically possible
[edit] further reading;
so obviously there is a fan and as I suspected, they simply hide the fan, compress the air and then let it go
seems to me this is going to use quite a bit more energy for the same amount of air
anyway, still looks kewl