Stagnation point

As a stagnation point (English stagnation point) is the point on the surface of a body is flowed (profile ) denotes where the flowing fluid impinges perpendicularly theoretically. The velocity of the flow stagnation point disappears, so that the kinetic energy ( in the idealized case correctly ) is converted into pressure energy. The pressure at the stagnation point, therefore, is compared to other places on the body surface, the largest and is referred to as total pressure. The current line ends as the sole at the stagnation point is usually referred to as stagnation point flow line.

With wings, the stagnation point on the leading edge of the profile. By changing the angle of attack also changes the position of the stagnation point changes. With the increase of the angle of the stagnation point moves a little to the wing underside. It follows that the inflowing air above the stagnation point immediately encounters the leading edge, a short distance opposite to the incoming air to travel to reach the top face.