Hi all,

 

please keep in mind that I am here only with theory at this time, also I am excomunicato from PL-heaven (maybe that counts for something?? :)).

 

What I gathered so far from the cooling discussions, I would try the following in this case:

 

a) any of the lines I have drawn into the sketch OC scoop-03

b) to add a little, make sure the intake lip has a smooth lip, with the biggest possible radius on the inside

c) IF your glass finish is "absolutely perfect" in front of the intake, I'd sand it with 400 or 360 in flow direction: mask of the area and only sand in one direction ( I would draw the block away from the intake...). The idea is to rough up the surface and create miniature vortex generators

if c) does nothing

d) Try out "real" vortex generators.

 

However, I believe (...if your sketch is sufficiently accurate) the most loss you see from "stall" in area B.

The red line is rather conservative (the first one I tried in paint :))

Bue and Magenta should get you fairly close to streamline. Magenta pushing towards Ed's "pinched ducts" system :) 

 

Personally I would try some foam insert before I would mess with turning vanes. AS your sketch looks you will not be done with a vane, as the air still slows too much because of the excessive retreat of the the upper duct wall....

 

Hope it helps!

Stand to be corrected!

 

TJ