Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1984-04-23
1987-10-06
Nase, Jeffrey V.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244207, B64C 2306
Patent
active
046977694
ABSTRACT:
The lift generated by delta wings is due primarily to large vortices associated with the flow separation near the leading edge. The invention includes a perturbation device to control the separation shedding of those vortices and manipulate their frequency and pairing. This results in different growth rates of the vortices downstream of the device and thus the lift produced by the large bound vortices may be controlled. If the invention is applied to both leading edges, the total lift of the wing will be altered; if the perturbation is preferentially applied on only one side of the wing, the moment around the roll axis of the aircraft is controlled. A first embodiment uses a piston coupled to a cavity and slot to produce the desired perturbation. Alternative embodiments are described which achieve the results without moving parts.
REFERENCES:
patent: 2783008 (1957-02-01), Bodine, Jr.
patent: 3090584 (1963-05-01), Kuchemann et al.
patent: 3774867 (1973-11-01), Quinn
Blackwelder Ron F.
Gad-el-Hak Mohamed
Srnsky Randy A.
Corl Rodney
Flow Industries, Inc.
Mollick Don R.
Moravan Gregory W.
Nase Jeffrey V.
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