|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 14 인용 특허 : 17|
Wing tip vortices are evident from airliner vapor trails, and helicopter blade slap. Elliptically loaded high aspect ratio tapered wings have minimum induced drag but cannot eliminate it. Different methods are disclosed herein, for upper and lower surface boundary layers to cancel their opposing vorticity upon shedding from the trailing edge, thereby eliminating wake vorticty, induced drag and associated noise. This requires wing-rotor-propeller or fan blades with a platform designed for uniform bound circulation and with boundary layer control near the...
I claim: 1. An apparatus comprising: a lift producing finite wing comprising a finite semi-span ending in a tip, with an upper surface, a lower surface, a leading edge, and a trailing edge; the wing moving through a fluid, the fluid having an undisturbed, free stream velocity relative to the wing; one or more boundary layer control suction slots positioned near the tip of the finite wing parallel and in close proximity to the trailing edge in at least one of the upper surface, the lower surface or the trailing edge itself; one or more boundary layer con...