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특허 상세정보

Perforated wing panel with variable porosity

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/06   
미국특허분류(USC) 244/209 ; 244/130
출원번호 US-0756402 (1991-09-09)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 31  인용 특허 : 0

The present invention involves laminar flow control for reducing drag on a body moving through a fluid. A skin is provided through which fluid in the boundary layer is drawn. The skin includes a plurality of perforations. The ratio of the effective area of the perforations to the skin area is spatially variable. The ratio is varied to compensate for expected variations in external pressure such that a substantially uniform suction results in a spatially uniform mass flow rate through the skin. Preferably, the perforations are approximately tapered to avo...


A laminar flow control airfoil, said airfoil having at least a first region and a second region, with said first region being subject, during flight, to an external air pressure greater than the external air pressure on said second region, the airfoil comprising: an outer skin having an upper skin surface and a lower skin surface with a plurality of unelongated perforations through said skin, each of said perforations having an effective cross-sectional area, to define an average ratio of effective unelongated perforation area to skin area for any region...

이 특허를 인용한 특허 피인용횟수: 31

  1. Voege, Wolfgang. Air sucking vehicle tail section component or wing section component, method for producing an air sucking vehicle tail section component and a wing section component and a vehicle, especially an aircraft, with an air sucking vehicle tail section component or wing section component. USP2015119193443.
  2. Willdig, Victor John; Sharp, Kim. Aircraft cooling duct. USP2015028960601.
  3. Collett Edward,GBX. Aircraft wing leading edge high lift device with suction. USP2000106135395.
  4. Alderman, James; Rolston, Stephen; Meyer, Jonathan. Aircraft wing rib. USP20180610005545.
  5. Rupp, Peter L.; Parikh, Pradip G.; Ng, Lian L.; Vijgen, Paul M.. Apparatus and methods for extending hybrid laminar flow control. USP2016119487288.
  6. Syassen, Freerk. Device for reducing the aerodynamic drag of a leading surface of an aircraft. USP2014108864082.
  7. Carson,Dale C.. Drag reduction system and method. USP2006027004094.
  8. Hill Larry Oather ; Goodlin Richard S. ; Mathews Christopher Roy ; Mehta Mahendra. Friction member and method for manufacture thereof. USP2000016013696.
  9. Khalid, Syed Jalaluddin. Gas turbine engine with ejector. USP2014098844264.
  10. Cloft, Thomas G.; Wiley, Richard H.. Integral suction device with acoustic panel. USP2010087766280.
  11. Cloft, Thomas G.; Wiley, Richard H.. Integral suction device with acoustic panel. USP2013068459597.
  12. Williams, Stewart W; Turner, Brian J. Laminar flow control system and suction panel for use therewith. USP2004066752358.
  13. Crouch, Jeffrey D.; Ng, Lian L.; Sutanto, Mary I.. Laminar flow surfaces with selected roughness distributions, and associated methods. USP2010127850126.
  14. Keefe Laurence R.. Method and apparatus for reducing the drag of flows over surfaces. USP1998095803409.
  15. Whitmore, Stephen A.; Saltzman, Edwin J.; Moes, Timothy R.; Iliff, Kenneth W.. Method for reducing the drag of blunt-based vehicles by adaptively increasing forebody roughness. USP2005056892989.
  16. Shatz Solomon. Method of making a perforated metal sheet. USP2001036202304.
  17. Brown, Keith T.. Modular plenum and duct system for controlling boundary layer airflow. USP2017099758240.
  18. Shatz Solomon (P.O. Box 523 Cupertino CA 94015). Movable sheet for laminar flow and deicing. USP1997015590854.
  19. Al-Garni, Ahmed Z.; Al-Qutub, Amro M.. Movable surface plane. USP2003096622973.
  20. Parikh, Pradip G.. Passive removal of suction air for laminar flow control, and associated systems and methods. USP2011017866609.
  21. Bertolotti,Fabio P.. Perforated skin structure for laminar-flow systems. USP2006127152829.
  22. Tiwari, Sean; Weaver, Luby. Perforated surface for suction-type laminar flow control. USP20180610000277.
  23. Khalid, Syed J.. Positionable ejector member for ejector enhanced boundary layer alleviation. USP2017049630706.
  24. Meister Juergen,DEX ; Pfennig Juergen,DEX ; Held Werner,DEX. Rudder assembly with a controlled boundary layer control for an aircraft. USP1999055899416.
  25. Hwang Danny P.. Skin friction reduction by micro-blowing technique. USP1998095803410.
  26. Breit Hubert,DEX. Suction generator system in an aircraft for maintaining a laminar boundary flow. USP1999035884873.
  27. Yasui Ken K. (Huntington Beach CA). Superplastically formed structure having a perforated skin. USP1997015591511.
  28. Reckzeh, Daniel; Goelling, Burkhard; Lengers, Matthias. Surface element for an aircraft, aircraft and method for improving high-lift generation on a surface element. USP2016039272772.
  29. Richardson, John. System and method for cooling an aircraft wing. USP2016099452841.
  30. Reckzeh, Daniel; Goelling, Burkhard; Lengers, Matthias. Wing for an aircraft, aircraft and method for reducing aerodynamic drag and improving maximum lift. USP2016039278753.
  31. Wood, Norman. Wing leading edge venting. USP2016119487287.