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Ernest,
FWIW
If I were you I would go with the pitot inlet in
the leading edge of the wing. The place you have the flush inlet is not really a
high pressure area. The air is being accelerated there and the pressure is
actually lower than ambient. You do not have a laminar flow situation so don't
worry about a little external diffusion.
I would also move your exit to just aft of the
thickest point on the top of the airfoil. And you need to have a nice smooth
exit ramp that merges the air back in with the flow. Not at 90 degrees. If you
get too far aft of the thickest point you will actually be in a pressure
recovery area and that is not good. The lowest pressure happens at the thickest
point on the top where the velocity is the highest. Just aft of that is an aft
facing area with low pressure-DRAG. Dump the exit air there and you kill the
drag and get good pressure differential.
I would also keep the internal ducting length to a
minimum so that you minimize internal flow losses.
Isn't it nice how all of this probably conflicts
with structural members and other considerations!
Welcome to compromise.
I have no Idea on sizing without really digging
into the power requirements of your airframe and I am way too busy to do a
thorough analysis right now. Copy Tracy's inlet sizing or make it bigger
proportional to the power difference and speeds. Probably closer than a bunch of
number crunching anyway.
Just taking an break for an afternoon. It rained a
lot last week and I have to wait for it to dry out so I can get back to work on
the shop. Which of course provides the perfect opportunity to do TAXES.....YUCK.
Of course I am using every excuse in the book to do
something else.
Monty
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