wrote:

wrote:

The Point of the Article is to understand their use.

Peter makes these statements.
"Vortex generators seem like a discordant
element in aerodynamic design" and "violating the rule that smoothness
is
desirable above all things"

Think, very hard about his statements. I have agreed with the first one
for many years.
Vortex Generators are a correction, of a poor airfoil use, at a given
angle and air pressure



ISTR hearing about someone with a Cherokee who used them to
reduce drag on his fuselage.


Three kinds of air flow.
Laminar, Turbulent and Separated.

Induced drag, that from generating lift, is hard to reduce significantly.

But dragging a bunch of small wakes is all parasitic drag.

Reattaching a separated wake should, in general, reduce patasitic drag,
and make the old sled that much faster...