15.5: Display Distribution of Cdi
With a lift-producing wing the air pressure is higher on the wings underside
than on the top side. Air which is at higher pressure tries to find a way into
the area with lower pressure. Such a pressure balance succeeds e.g. at the wing
tips, in addition, within areas where gaps (flap gap) are to be found. From
flow around these places arise vortices, which generate drag. This drag is
called induced drag Cdi. With the following button the distribution of the
induced drag in span direction can be made visible.
The picture below illustrates this function in the 2D-graphic window.