|
[DPRG] Computing back pressure in an exhaust system
Subject: [DPRG] Computing back pressure in an exhaust system
From: Triffid Hunter
triffid_hunter at funkmunch.net
Date: Wed Dec 5 21:07:24 CST 2007
On Wed, 5 Dec 2007, Chuck McManis wrote:
> My current best idea is to build some tubing that connects from the output of
> my Shop-Vac, has a way to put an exhaust system in the middle of it and then
> a vertical tube with an indicator (probably a ping pong ball) at the output.
>
> The thought being that even if I couldn't calibrate it in SI units I could at
> least get a comparison of the existing exhaust system and my new one. I'm
> hoping that the ping pong ball going up to the same level means that they
> have equivalent rates of flow, which translates into equivalent back
> pressure.
>
> Any thoughts on this problem?
> --Chuck
Should work fine for a/b comparison, however you may need something
heavier than a ping pong ball, and a tapered vertical pipe so the higher
the ball goes, the more room there is around it, and the less pressure on
the underside of the ball. A straight pipe will have the same pressure
along its whole length, so as soon as the flow is enough to move the ball,
it'll come out the top.
A piece of mesh over the opening would also be wise, to catch the ball if
it's too light ;)
More information about the DPRG mailing list
|
