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특허 상세정보

Fluidic chevrons and configurable thermal shield for jet noise reduction

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-001/40    B64C-001/00   
미국특허분류(USC) 244/001.N; 060/226.1; 244/053.R
출원번호 UP-0610718 (2003-06-30)
등록번호 US-7581692 (2009-09-16)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Clarke, Penny A.
인용정보 피인용 횟수 : 2  인용 특허 : 23
초록

A system for jet engine noise control of a jet engine having a main jet stream exiting an exhaust nozzle and flowing along a jet axis includes a thermal acoustic shield directed at a non-zero angle relative to the jet axis. The thermal acoustic shield may be configurable about the main jet stream. The system may further include at least a fluidic chevron injected at a location relative to the nozzle exit for enhancing mixing in the main jet stream and creating a non-circular jet stream.

대표
청구항

What is claimed is: 1. A system for jet engine noise control of a jet engine having a main jet stream exiting a nozzle exit and flowing along a jet axis, the system comprising: a plurality of vortex generator jets configured to inject a plurality of jets of fluid at reconfigurable locations relative to the nozzle exit during different stages of a mission for creating a non-circular jet stream. 2. The system of claim 1 comprising between 16 and 32 vortex generator jets. 3. The system of claim 1 wherein at least one jet of fluid is injected at an ang...

이 특허에 인용된 특허 (23)

  1. Carey John P. (Upper Marlboro MD) Lee Robert (Cincinnati OH) Majjigi Rudramuni K. (Cincinnati OH). Acoustically shielded exhaust system for high thrust jet engines. USP1995045402963.
  2. Hassan Ahmed A. ; Straub Friedrich K. ; Domzalski David B. ; Kennedy Dennis K.. Active blowing system for rotorcraft vortex interaction noise reduction. USP1998095813625.
  3. Braga Da Costa Campos, Luis Manuel. Active noise reducing nozzle. USP2004036705547.
  4. Sorensen Norman E. (Saratoga CA) Latham Eldon A. (Sunnyvale CA). Aircraft engine nozzle. USP1980074214703.
  5. Rudolph Peter K. C.. Aircraft scoop ejector nozzle. USP1998105826794.
  6. Dorris ; III John ; Smith David Michael ; Parekh David Espineli ; Kibens Valdis. Apparatus and methods for active flow control of a nozzle exhaust plume. USP2001106308898.
  7. Friedrich Thomas E. (7 Egerton Place London ; S.W.3 GBX). Arrangement for suppressing jet engine noise. USP1990064934481.
  8. Wood Jonathan M. (West Chester OH) Hauer Thomas A. (West Chester OH) Lippmeier William C. (Cincinnati OH). Axisymmetric vectoring exhaust nozzle thermal shield. USP1996015485959.
  9. John F. Brausch ; Bangalore A. Janardan ; John W. Barter, IV ; Gregory E. Hoff. Chevron exhaust nozzle for a gas turbine engine. USP2002036360528.
  10. Lair, Jean-Pierre. Duplex mixer exhaust nozzle. USP2004096786038.
  11. Greenlaw Alfred L. (12017 210th Pl. Southeast Issaquah WA 98027). Ejector and method for controlling jet engine noise. USP1985054516660.
  12. Wygnanski Israel J. (2632 E. Calle Sin Ruido Tucson AZ 85718). Interference with vortex formation and control of fluid flow to reduce noise and change flow stability. USP1995045402964.
  13. Wright Charles P. (Seattle WA). Internally ventilated noise suppressor for jet engine. USP1984104474259.
  14. Berman Charles H.. Jet engine noise suppressor assembly. USP1999095947412.
  15. Stanek, Michael J.. Jet noise suppressor. USP2003066571549.
  16. Ngo Hieu Thien. Method and apparatus for a fan noise controller. USP2001066244817.
  17. Miller, Daniel N.; Yagle, Patrick J.; Ginn, Kerry B.; Hamstra, Jeffrey W.. Method and apparatus of asymmetric injection into subsonic flow of a high aspect ratio/complex geometry nozzle. USP2005116962044.
  18. Chew Thomas ; Steyer William ; Moore Clinton Clark ; Harrold Michael Charles. Removable baffle infrared suppressor. USP2001076253540.
  19. Klees Garry W. (Mercer Island WA). Simplified method and apparatus for hot-shield jet noise suppression. USP1981094291782.
  20. Janardan, Bangalore Ananthamurthy; Brausch, John Francis. Stub airfoil exhaust nozzle. USP2003016502383.
  21. Cowan ; Sr. Howard H. (3315 N. Godfrey #36 Midland TX 79707). System for suppressing engine exhaust noise. USP1995075428954.
  22. Seiner John M. ; Gilinsky Mikhail M.. Undulated nozzle for enhanced exit area mixing. USP2000076082635.
  23. Birch Stanley F. (Bellevue WA) Lawler John A. (Seattle WA) Paynter Gerald C. (Seattle WA). Vortex generators for internal mixing in a turbofan engine. USP1979114175640.