Building a Flow bench

[944Technologist]

Did you get someone to check your math this time Eric? Last week your
calculations were only off by over 16,000cfm. Keep it up, you make me laugh.

FR Wilk
_________________________________________

----- Original Message -----
From: "Eric Fahlgren" <efahl at adams.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, January 31, 2002 11:32 AM
Subject: Re: Building a Flow bench


> 944Technologist wrote:
> >
> > I have been thinking about this project for years and always intended to
use
> > a leaf blower. I still need a meter. I looked up the specs on the leaf
> > blower that I have and it draws twice the air that I will require. A
>
> Ah, but you are forgetting the other important variable, the
> pressure ratio at which this flow occurs.  The leaf blower specs
> are for free air on both sides of the turbine, which is probably
> a pressure ratio of 1.2:1 or something really low.  When you
> go to put it on a flow bench you want (iirc from a previous
> post on this thread) about 25 in/Hg, or about 17 kPa absolute,
> giving a pressure ratio across the turbine of about 6:1 or
> higher; it just ain't gonna happen.
>
> --
> Eric Fahlgren                            Mechanical Dynamics, Inc
> efahl at adams.com                          Ann Arbor, Michigan, USA
>
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