Series Fans - a cool invention by Swish, spcman & Rikstafer, but worthy of The Three Stooges.

SirOracle is Orgone
Session Start: Tue May 06 06:27:58 2003
* Now talking in #mensa

Swish i tried to duct the fan cooling my computer.. didn't work out so well ;D
spcman well they are already ducted.
spcman in fact computer fans are a real good example of a ducted fan.
Swish they're not ducted enough! :)
spcman stack several in series swish.
Swish spcman, do they need to have opposing spin?
Swish or same spin direction?
spcman well optimally, yes.
spcman you could put stators in it.
spcman the stators straigten out the airflow.
Swish hmm.
spcman but for demonstration purposes you can get by without em.
Swish but is putting four fans in series going to spit out as much airflow as four fans in parallel?
spcman the velocity of the air will be higher for series fans.
Orgone why?
spcman The over all pressure would be higher for series fans.
Swish right. but quantity of air.. cubic-feet-per-minute numbers
Rikstafer Ummmmm It would depend on the diameter of the tube
spcman but one issue is back pressure.
Swish back pressure... the "vacuum" in front of the intake?
spcman no, back pressure is the difference in pressure from front to rear of the fan or pump.
Orgone For series fans to produce more airflow the last fan would have to be driving the previous three.
spcman so if your computer cannot exhaust air as fast as it is pushed in, then having parallel fans might provide diminishing returns.
Swish spcman, hehehe yup that would work :)
Orgone If the airflow through the previous fans is increased, then their blades must be driven by the higher airflow. There would be greater airflow if they weren't there.

* Swish sets mode: +b *!*@62.136.141.165
* You were kicked by Swish (waste of life, and did you notice that nobody was talking to you?)
Session Close: Tue May 06 06:39:28 2003

Footnote
Well, I noticed that nobody was hearing me
This must qualify as a classic howler