CliveL
Dude, those are very nice illustrations, but I would make a small correction to the lower picture - the bleed flow is shown as entering the void at the front of the slot between the front and rear ramps whereas in reality it goes (sorry went :-( ) in at the rear behind the terminal shock. The increase in pressure behind that shock was the 'drive' for bleed flow.
Clive, thank you so much for your correction; I will ammend this diagram in my files immediately.
(As always you are of course 100% on the bal. And what do aerodynamisits know about aerodynamics anyway
).
Best regards
Dude