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Ok, Al, got your point this time. If poor to
start with then any improvement might look great but be substantially less than
a good installation to begin with. The inlet does look more like the old
"traditional" sinusoidal inlets( which we know are about the worst you could
choose) rather than say - a "Streamline Duct".
Ed
----- Original Message -----
Sent: Saturday, March 08, 2008 6:30
PM
Subject: [FlyRotary] Re: Emailing:
Inclinded Radiators.doc
Sorry, Al, there was not any more
to be had out of that document. I can understand that all angles of
inclination may not be equal - in heat transfer or drag, but must admit I was
surprised to find that 55deg supposedly provided 30% more heat transfer and
20% less drag than one perpendicular to the air flow. It would be
interesting to find out the source of such a conclusion - I mean the graph
looks like it comes from somewhere{:>)
Ed.
Ed;
I didn’t mean to
imply that they were ‘making it up’. I can believe that that is what
they actually measured. From the drawing it appears that the diffuser section
is what K & W called ‘old style’; so with the rad perpendicular there may
have been flow separation or whatever; IOW poor pressure recovery.
Inclining the rad increased the pressure drop, and at some point the flow
stayed attached and everything worked great – you see what I’m getting
at. Too many other variables. It’s like a one person testimonial
on a health food supplement – “Oh, yeah; it cured my cancer, my athletes foot
and bad breath; I swear by the stuff”. And actual data shows it doesn’t
do anything.
Al
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