|
I mentioned the recent article in Sport Aviation on
Liquid cooling in a previous post. I then located one of the authors and
ask a couple of questions. One of the question I asked the author his
opinion as to the effectiveness of truncating the Streamline duct coordinates
(since even it gets a bit long for an aircraft installations).
The author Neal Willford responsed as
follows:
3) I
am well aware of the painful reality of trying to do an 'optimum'
installation. Yes, you should be able to truncate the Kuchemann bellmouth
style diffuser. Most of the diffuser is fairly shallow slope before it
bellmouths up to the cooler. It's the bellmouth shape that matters the
most. You might try laying out the ideal one and truncating it off at the
max length you can do and try that (or is that what you have already
done?).
I hope
this helps. Please keep me posted if you do any more
experimenting!
Regards,
Neal
Neal's suggested
approach is the approach I took when I modified one of my cooling ducts and
as I reported it seemed to make a big difference even though I had to truncate
the Streamline coordinates quite a bit. I simple kept the bellmouth end
(the end next to the radiator) and truncated out toward the inlet. My duct
has an effective lenght of probably around 6". Yet, it still seems to help
considerably over the old duct.
FWIW
Ed Anderson
RV-6A N494BW Rotary
Powered
Matthews, NC
|