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Unread 05-24-2004, 10:30 PM   #1
bobkoure
Cooling Savant
 
Join Date: Feb 2003
Location: USA - Boston area
Posts: 798
Default blower principle of operation?

OK, I know a bit about axial fans.
I'm now wondering about "cage" blowers.
I assume the vanes in the cages are wings. They certainly have an angle of attack and relative wind (wind direction being perpendicular to the opening of the cage).
So... in spite of it looking like a centrifugal water pump it's really a fan (?) Is that right?
I'm trying to figure out if they'd be over-sensitive to restriction on the inlet side (the way centrifugal water pumps are). Anyone know? Yes, I realize they're called "blowers", not "suckers" - but that's what I'm thinking about using them for.
I'm also wondering if the outer housing is actually necessary for the operation of the "suction side"? I don't believe it does, as long as the inlet area is shrouded away from the outlet area. Have I got this right?
I've ordered a couple of these from AllElectronics. They don't have the "oomph" BB is looking for, but may actually be fine for my use (low noise, pretty good cooling). And if they don't work for me, I'll have learned something - and have yet another interesting "desk gizmo"
Thanks!
Bob
PS: If all this info is on a web site (or in a book I can get) please just point me at it -thx!
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