hi J.Cran
sorry for the word "turbulator".
I don't mean a vortex generator or a fence.
I'm trying to explain : on a wing, a line at the stall limit that "delimits" the stall region and catches the stall "bubble", or the early turbulence.
http://www.mh-aerotools.de/airfoils/turbulat.htm
this shows a pneumatic turbulator, but it can simply be a V groove.
From my little understanding,the are generally used to "drive" and delimit the stall zone , avoiding some vibrations.
i was thinking about that while i was thinking on a high-lift - airfoil , with a late but brutal stall.
has it been experimented ?
thank you