초록 ▼

Apparatus for reducing drag and improving optical observation through an open aircraft port includes a ramp mounted on the port downstream edge, orifices or slots in the ramp surface interconnected by a manifold, and an associated air pump for withdrawing air from the free shear layer through the ra

Apparatus for reducing drag and improving optical observation through an open aircraft port includes a ramp mounted on the port downstream edge, orifices or slots in the ramp surface interconnected by a manifold, and an associated air pump for withdrawing air from the free shear layer through the ramp to provide reattachment of the free shear layer at a preselected location on the ramp. The apparatus also can include conduits for supplying the extracted air to apertures located in a lip on the port upstream edge for injecting air along the free shear layer to control detachment.

대표청구항 ▼

Apparatus for reducing drag from, and improving optical observation through, an open aircraft port during flight, the open port having an upstream edge and a downstream edge relative to an airstream following past the port, the airstream detaching from the vicinity of the upstream edge and flowing a

Apparatus for reducing drag from, and improving optical observation through, an open aircraft port during flight, the open port having an upstream edge and a downstream edge relative to an airstream following past the port, the airstream detaching from the vicinity of the upstream edge and flowing across the open port in a free shear layer, the apparatus comprising: a ramp position at the downstream edge and having a ramp surface facing the port; and means associated with said ramp for inducing reattachment of the free shear layer at a preselected location on said ramp surface, wherein said reattachment means includes means for extracting air from the vicinity of said preselected ramp surface location, whereby flow disturbances over and aft of the port are reduced and density variations in the free shear layer across the port are reduced.