Boundary Layer
Thread Starter
Joined: Mar 1999
Posts: 1,038
Likes: 23
From: Someday I will find a place to stop
Boundary Layer
There is a stationary layer of air against the surface of the wing as part of the Boundary Layer. A dirty/rough surface also has a stationary layer against it. Which would therefore mean subsequent layers of air in the Boundary Layer 'see' no difference between a smooth and rough surface.
So is the difference that the Seperation Point is further forward with a dirty surface?
So is the difference that the Seperation Point is further forward with a dirty surface?
Joined: May 1999
Aviation Qualifications: ATP+Mil
Posts: 27,395
Likes: 857
From: Quite near 'An aerodrome somewhere in England'
The transition point (not the separation point) will be further upstream if the surface is rough / dirty; such a surface will provoke turbulence and increase the depth of the boundary layer.
