Not sure if I followed your entire post, but it seems you would want laminar
flow from the point of entry all the way to the valves. Yes, the valves
will cause turbulence, but your main objective is to speed the flow of air
from point of entry to the valve (assuming the intake is the bottleneck and
not the valves). Only way we can fix the valve problem is either go to
larger valves (but then you lose velocity) or re-design the engine (maybe
with reed valves or rotary valves?).
-----Original Message-----
From: Shaun.Hendricks@bergenbrunswig.com
<Shaun.Hendricks@bergenbrunswig.com>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Friday, February 12, 1999 11:43 AM
Subject: DML: RE:DML Smooth Air...
> Ahhh... actually, since the gas does not enter the equation until the
>cumbustion chamber, the intake valves would disrupt laminar flow by their
very
>design: past the intake valve. This is exactly what you want. Laminar
flow
>up to the cylinder and turbulence inside the cylinder. So I get your
point,
>but I think you'd have some pretty nasty turbulence caused by the cylinder
>action itself. The truth is, I don't think you can maintain true laminar
flow
>past the main intake port of the intake manifold since each cylinder
doesn't
>pull continuously like a fan or wind tunnel. When the air is forced to
break
>up to the individual cylinders you'll get kind of a "rotating" effect as
the
>air is drawn into cylinders around the manifold.
> I'm looking to induce it prior to the throttle body...
>
>Shaun
>
>
>---original message---
>Shaun,
>I have done nothing in the way of intake mods to my Dak, but did several =
>to the old small block Chevy in the mid 70's. And now with my =
>qualifications strongly in question, your description of laminar flow is =
>basically correct. I would think that a maximum mix of the air-fuel =
>would be desirable. If this is the case laminar flow is not the effect =
>we would want. As an example, if you have ever noticed the wind tunnel =
>videos of laminar flow with smoke tracers the smoke does not 'mix' with =
>the airflow until well past the transition from laminar to turbulent =
>flow. I wish I had a video to post, when I find one I will provide the =
>URL. For moving a lot of fluid with the least drag it is a good idea, to =
>mix fluids together turbulence is the best flow mechanism.
>Just my thoughts on the concept.
>
>oh yea always remember "you can tell an engineer.... but you can't tell =
>him much"
>
>Thom G.
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