Method and apparatus for controlling bound vortices in the vicinity of lifting surfaces
Patent 4697769 Issued on October 6, 1987. Estimated Expiration Date: 
October 6, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 6, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2783008 3090584 3774867 InventorsAssigneeApplicationNo. 06/603097 filed on 04/23/1984US Classes:244/199.2, Of tip vortex244/207With blowingExaminersPrimary: Nase, Jeffrey V.Assistant: Corl, Rodney Attorney, Agent or FirmInternational ClassesB64C 23/06 (20060101)B64C 23/00 (20060101) AbstractThe 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. | |
