Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1991-09-09
1993-11-23
Barefoot, Galen
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244130, B64C 2106
Patent
active
052636674
ABSTRACT:
The present invention involves laminar flow control for reducing drag on a body moving through a fluid. A skin is provided through which fluid in the boundary layer is drawn. The skin includes a plurality of perforations. The ratio of the effective area of the perforations to the skin area is spatially variable. The ratio is varied to compensate for expected variations in external pressure such that a substantially uniform suction results in a spatially uniform mass flow rate through the skin. Preferably, the perforations are approximately tapered to avoid inspiration of debris and unwanted outflow.
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Barefoot Galen
The Boeing Company
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