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특허 상세정보

Use of flow injection and extraction to control blade vortex interaction and high speed impulsive noise in helicopters

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-027/72   
미국특허분류(USC) 244/001N ; 244/017.11 ; 244/017.13 ; 244/199 ; 244/207
출원번호 US-0393506 (1999-09-10)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Leonard Charles SuchytaWeixel
인용정보 피인용 횟수 : 22  인용 특허 : 9
초록

An active control device for reducing high-speed impulsive ("HSI") and blade vortex interaction ("BVI") noise in a rotor aircraft, such as a helicopter, is disclosed. The system comprises a plurality of rotor blades extending radially in spaced relationship from a central hub, each of the blades having spaced apart upper and lower surfaces, an interior volume between the surfaces, and leading and trailing edges at the respective joined edges of the upper and lower surfaces. Air intake passages are disposed on the surfaces of each blade proximate the lead...

대표
청구항

[ What is claimed:] [1.]1. A system for reducing high speed impulsive blade noise (HSI) in aircraft rotors, the system comprising:a plurality of rotor blades extending radially in spaced relationship from a central hub, each of said blades having spaced apart upper and lower surfaces, an interior volume between said surfaces, and leading and trailing edge portions at respective opposing joined edges of said upper and lower surfaces of each blade;air intake passages disposed on the upper and lower surfaces of each blade proximate the leading edge and tip ...

이 특허를 인용한 특허 피인용횟수: 22

  1. Shmilovich, Arvin; Yadlin, Yoram; Clark, Roger W.. Active systems and methods for controlling an airfoil vortex. USP2011098016244.
  2. Mau, Knut; Grünewald, Michael; Reichenberger, Johann; Borchers, Ingo; Drobietz, Roger. Aerodynamic flap of an aircraft having a device which influences the flap vortex. USP2012018096513.
  3. Dunn,Shaun Stephen. Aerofoils. USP2007097264444.
  4. Shmilovich, Arvin; Yadlin, Yoram; Clark, Roger; Leopold, Donald. Apparatus and method for the control of trailing wake flows. USP2009107597289.
  5. Shmilovich,Arvin; Yadlin,Yoram; Clark,Roger; Leopold,Donald. Apparatus and method for the control of trailing wake flows. USP2006097100875.
  6. Greenblatt, David. Energy conversion from fluid flow. USP2017129841000.
  7. Isotani, Kazuhide; Hayama, Kenji. High-lift device of air vehicle. USP2017109789955.
  8. Isotani, Kazuhide; Hayama, Kenji. High-lift device of flight vehicle. USP2016049302761.
  9. Isotani, Kazuhide; Hayama, Kenji. High-lift device of flight vehicle. USP2017049623956.
  10. Isotani, Kazuhide; Hayama, Kenji. High-lift device of flight vehicle. USP2017039586672.
  11. Bebesel, Marius; Pongratz, Reinhard; Roth, Dieter. Method and device for avoiding a collision of a rotating rotor blade of a rotary-wing aircraft with blade vortex. USP2004066749152.
  12. Wooden, Perry; Moor, Ruble E.; Charlton, Eric F.; Miller, Daniel N.; Blosch, Edwin L.; Azevedo, Jeffrey J.. Minimally intrusive wingtip vortex wake mitigation using inside-mold-line surface modifications. USP2015028960609.
  13. Scott, Mark W.. Mission adaptive rotor blade. USP2016119505492.
  14. van der Westhuizen, Jacob Johannes. Mission-adaptive rotor blade with circulation control. USP2017059637229.
  15. van der Westhuizen, Jacob Johannes. Mission-adaptive rotor blade with circulation control. USP2015049004394.
  16. Leishman, John G.; Han, Yong Oun. Rotor blade system with reduced blade-vortex interaction noise. USP2005096948906.
  17. Pitt, Dale M.. System and method for varying the porosity of an aerodynamic surface. USP2012088251317.
  18. Shmilovich, Arvin; Yadlin, Yoram; Clark, Roger W.; Leopold, Donald H.. Systems and methods for destabilizing an airfoil vortex. USP2010027661629.
  19. Lewis, Michael S.; Meserole, Jere S.; Dunn, Michael J.; Tillotson, Brian J.. Systems and methods for tracing aircraft vortices. USP2010037686253.
  20. Lewis, Michael S.; Meserole, Jere S.; Dunn, Michael J.; Tillotson, Brian J.. Systems and methods for tracing aircraft vortices. USP2013028376284.
  21. Lewis, Michael S.; Meserole, Jere S.; Dunn, Michael J.; Tillotson, Brian J.. Systems and methods for tracing aircraft vortices. USP2011017874522.
  22. Loth,John L.. Vorticity cancellation at trailing edge for induced drag elimination. USP2006117134631.