Brother bernoulli was hard at work at compressor discharge in a
turbocharger which is expected to increase the pressure at the BIG end, undt
zo........ the revese is "ta-da".
Just for the books, in the ancient past I remember the so called "optimum
gas speed" for best flow was 325 fps. Anyone remember differently?
Interesting enough this might explain a little why lots of times increasing
the size of the inlet valves does NOTHING for the power and may even be a
deterant. This is so much fun I may have to unlimber my turbocharged solar
powered slide rule.
Come on Bill Babcock, you must have something to add here from your bike
engine days.
----- Original Message -----
From: "John Herrera" <jrherrera90@hotmail.com>
To: <cartravel@pobox.com>; <vinttr4@geneseo.net>
Cc: <fot@autox.team.net>; <try0548@rit.edu>
Sent: Tuesday, December 09, 2003 9:01 AM
Subject: Re: Cylinder Head Flow
> Larry:
>
> I'm not sure, but I think you got it right when you mentioned Bernoulli's
> Principle. The pressure of the fluid (liquid or gas) at the small diameter
> end of the tube would be lower due to Bernoulli's Principle. This would
> cause a pressure differential from the entrance (higher) of the tube to
the
> far end (lower). The pressure differential would give an added "push" to
the
> liquid, wouldn't it?
>
> I'm writing lecture notes for Fuel Metering Systems, so I've got Bernoulli
> on the Brain; maybe the increase in flow has to do with something else!
>
> John Herrera
>
> >From: Larry Young <cartravel@pobox.com>
> >Reply-To: Larry Young <cartravel@pobox.com>
> >To: "Jack W. Drews" <vinttr4@geneseo.net>
> >CC: fot@autox.team.net, Tom Young <try0548@rit.edu>
> >Subject: Re: Cylinder Head Flow
> >Date: Tue, 09 Dec 2003 08:03:13 -0600
> >
> >Jack,
> >I've been wondering about the reason for a constantly decreasing
> >crossection. Can you give a technical explanation why the taper increases
> >flow? Decreasing area means increasing velocity and increasing kinetic
> >energy. The pressure is also dropping, so the density is dropping. It
> >must be explained by the Bernoulli equation?
> >Larry
> >
> >Jack W. Drews wrote:
> >
> >>One final comment on the business of a constantly decreasing diameter.
> >>Let's say you have a one foot long tube, constant diameter, and you
> >>measure the flow through it. Now let's say that you machine this tube so
> >>that it is larger at the inlet end by only .012 inch, and you measure
the
> >>flow. You find that the tapered tube, slight as it is, flows more air.
> >>Fascinating, huh?
>
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