The videos show how changing the angle of attack or the deflection of a flap changes the flow field around an airfoil. It is interesting to note, that a flap deflection has a strong effect at the leading edge, not only at the trailing edge. This is why most commercial airplanes which use large flap deflections also use leading edge devices like slats or Krüger flaps to adapt the leading edge shape to the local flow direction. The last video "Angle of Attack 2") shows the relation between flow field and surface velocity distribution.
| AVI |
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MPEG | ||
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(160x120
AVI file, 0.804 MB) |
Flap Deflection | (240x180
MPEG file, 0.685 MB) |
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(160x120
AVI file, 0.970 MB) |
Angle of
Attack 1 |
(240x180
MPEG file, 0.666 MB) |
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| Angle of
Attack 2 |
(240x180
MPEG file, 2.019 MB) |
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