replying to an old post from 8-6-07, because it had relevant pics

Hi Al,

Here are a few thoughts, from only from the things I've read & seen on
fast planes.

In OCinlet1, you mentioned that the bottom 'lip' of the inlet is to the
rear of the inlet top. I can't cite any references, but I think I've
read that air will have a harder time being 'captured' by the inlet if
it's configured that way
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Charlie,
I agree.  The original inlet was that way, but I have since extended the
scoop so that is no longer the case.
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In the exit pic, it looks like the top edge leads the bottom edge. Any
chance that this allows the higher energy air high on the sides to curl
around the into the outlet, since the edges slope forward? Also, how
sharp-edged is the exit duct end? If the exit lip is rounded at all, it
will encourage the air to curl back into the inlet. How sharp edged is
the wing trailing edge behind the exit? (Same issue: air curling up &
forward on the wing.)
You mentioned possible flow separation on the top of the exit. What if
it's just pressure recovery on that part of the wing? From the pics, it
looks like both the inlet & outlet are placed far back toward the
trailing edge. All the stuff I've read implies that the boundary layer
gets very thick as you get closer to the rear of a structure, and also
that pressure near the trailing edge of an airfoil is actually positive
instead of negative.
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The trailing edge of the exit fairing is relatively sharp, maybe 1/16 -
3/32" radius.  Yes, it might be better if it squared off.  The wing trailing
edge is quite sharp.

It is likely that the BL is quite thick at the exit position.  I have tried
VGs on that surface with no gain.  My measured pressure on the top of the
fairing, and at the midpoint of the opening behind the fairing, is about
-0.75" H2O, so it is slightly negative.

Al