I'm not sure I want the air going through my TB to act like, "a jello plug":
;^)
Brett "I'll take mine thin, thank you" Brucklacher
-----Original Message-----
From: Gary Shook [mailto:gary.shook@mci.com]
Sent: Wednesday, February 24, 1999 1:01 PM
To: dakota-truck@buffnet.net
Subject: DML: aerodynamics (off topic), was: intake and exhaust
aerodynamics (long)
>Well, I remember reading in a science mag a coupla years ago about how
rough
>surfaces are aerodynamically more efficient than smooth surfaces. A coupla
>guys were experimenting with different surfaces and measuring liquid flow
>(velocity) through a pipe. The pipe with the smooth surface had low
>velocity because liquid running against the surface would shear and roll up
>(like rolling a carpet up) until it got so big it would break away from the
>surface and create turbulence, thus slowing overall velocity.
I couldn't help responding to this, reminded me about the Trans Alaska
Pipeline System (TAPS)... they discovered this very phenomenon was limiting
flow through the 4' diameter pipe that carries crude oil 800 miles through
Alaska... their solution was introduction of a long-chain polymer that they
call DRA (Drag Reduction Agent) which essentially makes the crude act like a
jello plug, moving through the pipe without turbulence... works very well,
put them over the 1.0M bbl per day mark... but it has to be re-injected
after each pump station... the massive turbine pumps destroy the long-chain
polymers, making them useless.
just a bit of trivial information, but I don't think it's real applicable
here, unless you could inject some DRA into your TB.. :-)
Gary Shook
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