is it possible to make a quite cieling fan?

mechfries · May 20, 2011, 03:11

Ceiling fan in my house are LOUD... i was thinking can't normal ceiling fan or simple fan be quiter when they run or is it impossible because moving air will always make sound?

Undergrad here... these loud fans are really annoying.. i just want to make something which simply blows air!

sail · May 20, 2011, 05:06

Quote:

Originally Posted by mechfries

Ceiling fan in my house are LOUD... i was thinking can't normal ceiling fan or simple fan be quiter when they run or is it impossible because moving air will always make sound?

Undergrad here... these loud fans are really annoying.. i just want to make something which simply blows air!

there.even if they are a bit expensive.

here is described how they work.

http://www.dyson.co.uk/technology/airmultiplier.asp if you go in the developement there is a cfd image of the cross section wich explain clearly the principle.

Ahmed · May 20, 2011, 06:54

Quote:

Originally Posted by mechfries

Ceiling fan in my house are LOUD... i was thinking can't normal ceiling fan or simple fan be quiter when they run or is it impossible because moving air will always make sound?

Undergrad here... these loud fans are really annoying.. i just want to make something which simply blows air!

View this video "Aerodynamics Generation of Sound" on this site
http://web.mit.edu/hml/ncfmf.html

mechfries · May 20, 2011, 11:50

thanks.... i was thnkiing like adding something around the fan which would magically dampen the sound..

dyson fans are pretty neat but they will still make the chop chop sound when taking in the air... but...they did say using same technology used in turbocharger.. which must mean using turbine shape blades in it...

sail · May 20, 2011, 13:03

try putting an honeycomb shaped grill downwind, it won't make it silent but at least you should be able to break down the largest vortexes and shift the sound to higher frequencies, wich might be less annoying. or if you are really into diy, try adding more blades.

mechfries · May 20, 2011, 13:09

Quote:

Originally Posted by sail

try putting an honeycomb shaped grill downwind, it won't make it silent but at least you should be able to break down the largest vortexes and shift the sound to higher frequencies, wich might be less annoying. or if you are really into diy, try adding more blades.

I was thinking about more blades

mechfries · May 21, 2011, 07:25

just had a random thought..if its possible to get output of 14xair from 1 air input..will it possible to reverse it capture 14xair energy into 1xair to power a wind turbine? like reverse a dyson to make it a wind turbine.... patented

May 20, 2011, 03:11	is it possible to make a quite cieling fan?	#1
mechfries New Member Tomys Join Date: Apr 2011 Posts: 24 Rep Power: 14	Ceiling fan in my house are LOUD... i was thinking can't normal ceiling fan or simple fan be quiter when they run or is it impossible because moving air will always make sound? Undergrad here... these loud fans are really annoying.. i just want to make something which simply blows air!

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May 20, 2011, 11:50		#4
mechfries New Member Tomys Join Date: Apr 2011 Posts: 24 Rep Power: 14	thanks.... i was thnkiing like adding something around the fan which would magically dampen the sound.. dyson fans are pretty neat but they will still make the chop chop sound when taking in the air... but...they did say using same technology used in turbocharger.. which must mean using turbine shape blades in it...

May 20, 2011, 13:03		#5
sail Senior Member Vieri Abolaffio Join Date: Jul 2010 Location: Always on the move. Posts: 308 Rep Power: 16	try putting an honeycomb shaped grill downwind, it won't make it silent but at least you should be able to break down the largest vortexes and shift the sound to higher frequencies, wich might be less annoying. or if you are really into diy, try adding more blades.

May 21, 2011, 07:25		#7
mechfries New Member Tomys Join Date: Apr 2011 Posts: 24 Rep Power: 14	just had a random thought..if its possible to get output of 14xair from 1 air input..will it possible to reverse it capture 14xair energy into 1xair to power a wind turbine? like reverse a dyson to make it a wind turbine.... patented