"Kevin R. Walsh" wrote:

There was just a discussion about this on the Cozy mailing list as
someone was adding VGs in fron of their NACA scoop.  They found that
after adding 2 VGs they could get the same inlet pressure (as measured
by an ASI) as the free stream.  The location of the NACA is the same as
the scoop shown in the CAD drawing, so I think this is all academic...

Kevin
Kevin Russert Walsh
Sr. Process & Equipment Development Engineer

Kevin,

where were the VG's located, what shape? I have looked at a lot of submerged
inlet stuff with all kinds of different approaches using VG's etc in NACA
papers. They all seem to say that when you are near the rear of the aircraft
in a thick boundary layer the submerged inlet is inferior to the snorkel
inlet. Maybe this person hit the magic location and is introducing energized
air into the boundary layer and solving this problem. I would certainly be
interested, because I would prefer to use a submerged if I thought the
pressure recovery was as good.

Monty

 
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