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특허 상세정보

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Passively driven acoustic jet controlling boundary layers

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) F01D-025/04   
미국특허분류(USC) 415/119; 415/914; 415/115; 415/1731
출원번호 US-0257563 (1999-02-25)
발명자 / 주소
  • Duane C. McCormick
  • Wesley K. Lord
출원인 / 주소
  • United Technologies Corporation
인용정보 피인용 횟수 : 43  인용 특허 : 8
초록
▼

Existing pressure oscillations created by axial or centrifugal fans in a diverging shroud are utilized to power a passive, acoustic jet, the nozzle of which directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, or a duct, the fluid particles in the resonant chamber of the passive acoustic jet being replenished with low momentum flux particles drawn from the fluid flow in a direction normal to the surface, thereby to provide a net time averaged flow of increased momentum flux particles to defe...

대표
청구항
▼

1. A fluid flow system, comprising:a fluid flow path having a surface and a stream of fluid flowing within said path, said fluid flow having a boundary layer adjacent said surface, said fluid flow having oscillatory pressure fluctuations; a passive acoustic chamber disposed near said surface; and a fluid passage interconnecting said chamber with said fluid flow path at a small acute angle with respect to said surface, said chamber and said passage forming a resonant, passive acoustic jet of which said passage forms a nozzle, the resonant frequency of sai...

인용문헌 (8)

  1. Pla Frederic G. (Schenectady NY) Rajiyah Harindra (Clifton Park NY) Renshaw Anthony A. (Albany NY) Hedeen Robert A. (Clifton Park NY), Active noise control using noise source having adaptive resonant frequency tuning through stiffness variation.
  2. Bothien Mihaylo-Rdiger (Waldshut-Tiengen DEX) Wthrich Christian (Fislisbach CHX), Device and method for reducing one or more resonant vibrations of rotor blades in turbomachines.
  3. Ngo Hieu Thien, Method and apparatus for a fan noise controller.
  4. Blackwelder Ron F. (Palos Verdes CA) Gad-el-Hak Mohamed (Federal Way WA) Srnsky Randy A. (Kent WA), Method and apparatus for controlling bound vortices in the vicinity of lifting surfaces.
  5. Wygnanski Israel (4559 N. Placita de las Charcras Tucson AZ 85718), Method and apparatus for delaying the separation of flow from a solid surface.
  6. Koff Steven G. (Cambridge MA) Nikkanen John P. (West Hartford CT) Mazzawy Robert S. (South Glastonbury CT), Rotor case treatment.
  7. Glezer Ari ; Allen Mark G. ; Coe David J. ; Smith Barton L. ; Trautman Mark A. ; Wiltse John W., Synthetic jet actuator and applications thereof.
  8. Goto Akira (Kanagawa JPX) Katsumata Tatsuyoshi (Kanagawa JPX) Aoki Masanori (Kanagawa JPX), Turbomachine.

이 특허를 인용한 특허 (43)

  1. Jones, Michael G.; Grady, Joseph E.; Kiser, James D.; Miller, Christopher; Heidmann, James D., Acoustic liners for turbine engines.
  2. Jones, Michael G; Grady, Joseph E; Kiser, James D.; Miller, Christopher; Heidmann, James D., Acoustic liners for turbine engines.
  3. Saddoughi,Seyed Gholamali; Gupta,Anurag; Giguere,Philippe, Active flow modifications on wind turbine blades.
  4. Tuan, Yen, Aero-acoustic aviation engine inlet for aggressive noise abatement.
  5. Nakayama, Yoshihiro; Baba, Yoshitaka; Ide, Satoshi; Iizuka, Koichiro; Fujisawa, Ryo; Toshima, Masatake; Suto, Kunihiko; Kurashige, Kazutaka; Egawa, Hiroshi; Sakuraba, Ichirou; Hayashi, Daisuke; Sugano, Keiji; Rasmussen, Svend; Al-Janabi, Ziad; Jensen, Finn; Moller, Lars Bay; Madsboll, Hans; Svarregaard-Jensen, Christian; Kristensen, Klaus Damgaard, Axial flow compressor.
  6. Webster, John R, Boundary layer control arrangement.
  7. Krivitzky, Eric M.; Larosiliere, Louis M., Centrifugal turbomachines having extended performance ranges.
  8. Power, Bronwyn; Xu, Liping; Wellborn, Steven R, Compressor blade.
  9. Curtis, Robert Boyd; Skoog, Robert W.; Belady, Christian L.; Metcalf, Jeffrey N., Dampening acoustic vibrations within an electronic system.
  10. Gorny, Lee J.; Koopmann, Gary H.; Capone, Dean E., Dipole flow driven resonators for fan noise mitigation.
  11. Prasad, Dilip; Prasad, Anil; Feiereisen, John Michael, Duct for reducing shock related noise.
  12. Farstad, Jerry E., Engine assembly, acoustical liner and associated method of fabrication.
  13. Winter, Michael, Fan nacelle flow control.
  14. Shah, Hemant S.; Hollingshead, John Stuart; Wang, John; Thawani, Prakash Tuljaram; Kosik, Richard Charles; Kumar, Mukesh, Fan shroud with built in noise reduction.
  15. Disimile, Peter, Fluid flow noise mitigation structure and method.
  16. Morford, Stephen A.; Larkin, Michael J., Gas turbine engine having slim-line nacelle.
  17. Morford, Stephen A.; Larkin, Michael J., Gas turbine engine having slim-line nacelle.
  18. Morford, Stephen A.; Larkin, Michael J., Gas turbine engine having slim-line nacelle.
  19. Morford, Stephen A.; Larkin, Michael J., Gas turbine engine having slim-line nacelle.
  20. Winter, Michael; Jain, Ashok K., Gas turbine engine providing simulated boundary layer thickness increase.
  21. Winter, Michael; Jain, Ashok K., Gas turbine engine system providing simulated boundary layer thickness increase.
  22. Stangeland,Maynard L., Inducer tip vortex suppressor.
  23. Sinha, Neeraj; Arunajatesan, Srinivasan, Modular flow control actuator.
  24. Ali, Amr; Qiu, Yuan J., Multi-splice acoustic liner.
  25. Jain, Ashok K.; Winter, Michael, Nacelle assembly having inlet airfoil for a gas turbine engine.
  26. Haas, Martin, Nacelle assembly having inlet bleed.
  27. Haas, Martin, Nacelle assembly with turbulators.
  28. Jain, Ashok K., Nacelle flow assembly.
  29. Jain, Ashok K., Nacelle flow assembly.
  30. Jain, Ashok K., Nacelle flow assembly.
  31. Todorovic, Predrag, Noise-reduced aircraft engine and method for reducing noise emissions of an aircraft engine.
  32. Rice, Edward C., Propulsive force vectoring.
  33. Gerlach, David W.; McCormick, Duane C., Sound attenuating heat exchanger for an internal combustion engine.
  34. Rice, Edward C.; Sumner, Bradley S., Splayed inlet guide vanes.
  35. Rice, Edward C., System and method for a fluidic barrier on the low pressure side of a fan blade.
  36. Rice, Edward C., System and method for creating a fluidic barrier from the leading edge of a fan blade.
  37. Tang, Punan; Jasso, Thomas P.; Chowdhury, Mohammed I., System and method for noise suppression.
  38. Lovett, Jeffery A.; Philippona, Derk S., Systems and methods involving reduced thermo-acoustic coupling of gas turbine engine augmentors.
  39. Baarck, Jenny N.; Krayenvenger, Daren; Proscia, William; Jones, Christopher D., Turbine engine tailcone resonator.
  40. Jain, Ashok K.; Winter, Michael, Variable contour nacelle assembly for a gas turbine engine.
  41. Jain, Ashok K.; Winter, Michael, Variable contraction ratio nacelle assembly for a gas turbine engine.
  42. Jain, Ashok K., Variable geometry nacelle assembly for a gas turbine engine.
  43. Jain, Ashok K.; Chaudhry, Zaffir A., Variable shape inlet section for a nacelle assembly of a gas turbine engine.

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