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Quietening fans/Blade-less fans?

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I've been thinking about fans and some of the tech we have to make quieter fans and I came up with 2 options that I would appreciate same opinions on from someone with more experience/expertise.

 

The first idea was a fan technology that made really quiet fans by making the edges of the blades jagged, like an owl's wing as it was said was the inspiration. Each blade had triangular cuts into the front and back edges, and the experiment I saw showed that it seemed to be very quiet.

 

The second idea is a blade-less fan. Surely if there are no blades then they aren't going to make much noise? - of if it does make noise, surely it would be quieter?

 

Anyway, those were just simple ideas that intrigued me a bit, but I'd like to know why they might/might not work.

 

Thanks for any help.

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Posted

how is a fan supposed to move air without blades? 

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Posted
Just now, PigWithAMustache said:

how is a fan supposed to move air without blades? 

Dyson airblade?

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5 minutes ago, Dutch-stoner said:

http://electronics.howstuffworks.com/gadgets/home/dyson-bladeless-fan.htm

 

How this thing works.

still uses blades. BUT it uses a principal of savaging air which increases the CFM of the fan by PULLING air from two sources.

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Posted

then why don't they make the bladeless fan with the pump that can go somewhere where a reservoir would go.

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1 minute ago, wii8cookies said:

then why don't they make the blameless fan with the pump that can go somewhere where a reservoir would go.

the amount of static pressure required is quite high, and to do that you need a super skookum rotor that is really screamin out the rippums.

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Posted

We already have owl company making fans, which *winkwink* are both quiet and look like owls. When components get cooled passively more, then we have quiet cooling for real.

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