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특허 상세정보

Vorticity cancellation at trailing edge for induced drag elimination

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/06    B64C-021/00   
미국특허분류(USC) 244/209
출원번호 US-0865195 (2004-06-10)
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...

이 특허에 인용된 특허 (17)

  1. Huang, Xingzhong. Active vortex control with moveable jet. USP2003126668638.
  2. Haney William R. (6507 Foxboro Dr. Mayfield Village OH 44143). Air foil providing vortex attenuation. USP1994035297764.
  3. Jupp Jeffrey A. (Filton GBX) Rees Peter H. (Hatfield GBX). Aircraft wing and winglet arrangement. USP1987124714215.
  4. Charles Bruce D. (Mesa AZ) Hassan Ahmed A. (Mesa AZ) Tadghighi Hormoz (Gilbert AZ) JanakiRam Ram D. (Mesa AZ) Sankar Lakshmi N. (Atlanta GA). Blade vortex interaction noise reduction techniques for a rotorcraft. USP1996125588800.
  5. Gratzer Louis B. (2201 3rd Ave. #2004 Seattle WA 98121). Blended winglet. USP1994095348253.
  6. Hoisington, Zachary C.; Rawdon, Blaine K.. Ground effect wing having a variable sweep winglet. USP2003046547181.
  7. Huenecke, Klaus. Method and apparatus for reducing trailing vortices in the wake of an aircraft. USP2003026513761.
  8. Azuma Akira (Kawasaki JPX). Noise reduction device for rotorcraft. USP1996105562414.
  9. Corjon, Alexandre; Leweke, Thomas; Laporte, Florent. Process and device for accelerating the destruction of at least two vortices in the wake of a moving body, particularly an aircraft. USP2004046719246.
  10. Ngo Hieu Thien. Tip vortex reduction system. USP1998085791875.
  11. Remington Paul J. ; Coney William B. ; Curtis Alan Robert Douglas. Use of flow injection and extraction to control blade vortex interaction and high speed impulsive noise in helicopters. USP2001096283406.
  12. van der Hoeven Antonius J. (Bellevue WA). Vortex generator. USP1987044655419.
  13. Ronald G. Meschino CA. Wing combination for drag reduction, aircraft including such a wing, and a method of reducing the drag of an existing aircraft. USP2002016340134.
  14. Ulrich La Roche CH; Lucas La Roche CH. Wing comprising a distal wing grid. USP2002086431499.
  15. Ransick Thomas F. (Rockford IL). Wingtip turbine. USP1992095150859.
  16. Gerhardt Heinz Adolf. Wingtip vortex device for induced drag reduction and vortex cancellation. USP1999085934612.
  17. Patterson ; Jr. James C. (Newport News VA). Wingtip vortex turbine. USP1990044917332.

이 특허를 인용한 특허 피인용횟수: 14

  1. Sammy, Johann Quincy. Adaptive control ducted compound wind turbine. USP2014098829706.
  2. Jonker, Adrianus Stefanus; Bosman, Johannes Jacobus. Controlling the boundary layer of an airfoil. USP2012088251319.
  3. Murdock, James R.; McKaveney, Christopher S.; Elliott, Jason. Fan blade attachment of gas turbine engine. USP2017119810077.
  4. Long, Donald James. Fluid dynamic body having escapelet openings for reducing induced and interference drag, and energizing stagnant flow. USP2014028651813.
  5. Shah, Parthiv N.. Methods and apparatus for deployable swirl vanes. USP2017029567867.
  6. Rice, Edward C.. Propulsive force vectoring. USP2018059976514.
  7. Herr, Stefan; Nanukuttan, Biju; Srikanta, Santhosha Yelwal; Prabhu, Karthick. Rotor blade fence for a wind turbine. USP2016129523279.
  8. Rice, Edward C.; Sumner, Bradley S.. Splayed inlet guide vanes. USP20181110125622.
  9. Rice, Edward C.. System and method for a fluidic barrier on the low pressure side of a fan blade. USP2018039915149.
  10. Rice, Edward C.. System and method for creating a fluidic barrier from the leading edge of a fan blade. USP20190310233869.
  11. Nies, Jacob Johannes; Haans, Wouter. System and method of operating an active flow control system to manipulate a boundary layer across a rotor blade of a wind turbine. USP2012098267653.
  12. Shmilovich, Arvin; Yadlin, Yoram; Clark, Roger W.. Traversing jet actuator. USP2012128336828.
  13. Shah, Parthiv N.. Variable geometry aircraft pylon structure and related operation techniques. USP2014108857761.
  14. Daniels, Jeffrey Michael; Robey, Chad Kegan. Yaw bearing cleaning assembly for wind turbine. USP2011088004106.