Method and system for reduction of jet engine noise
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02K-003/02
F02K-003/00
출원번호
UP-0664695
(2003-09-22)
등록번호
US-7631483
(2009-12-24)
발명자
/ 주소
Mani, Ramani
Graziosi, Paolo
출원인 / 주소
General Electric Company
대리인 / 주소
Clarke, Penny A.
인용정보
피인용 횟수 :
14인용 특허 :
14
초록▼
In an aspect, a method is provided for attenuating jet engine noise. Air velocity, adjacent to an inlet fan duct outer wall, is increased to a greater rate than typical velocity of an operational engine ambient inlet airflow, adjacent to the inlet fan duct outer wall. Boundary layer and associated t
In an aspect, a method is provided for attenuating jet engine noise. Air velocity, adjacent to an inlet fan duct outer wall, is increased to a greater rate than typical velocity of an operational engine ambient inlet airflow, adjacent to the inlet fan duct outer wall. Boundary layer and associated turbulence is reduced or eliminated. Refraction and absorption of inlet sound into an acoustic liner is optimized. In an aspect, air velocity is increased by injecting air. In an aspect, air velocity is increased by exerting a suction force. In an aspect, a system is provided to attenuate jet engine noise. In an aspect, a fluid duct is provided opening to an inlet fan duct outer wall and to aft of a fan rotor.
대표청구항▼
We claim: 1. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall, wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein open
We claim: 1. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall, wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of a fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein said fluid duct is structured of sufficient dimension for allowing a mass flow rate of air within a range of one percent to two percent of said ambient inlet air. 2. The system as in claim 1, wherein said fluid duct is structured to provide a plenum. 3. The system as in claim 1, wherein said fluid duct is substantially disposed within a nacelle. 4. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall, wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of a fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein said first end having a slot therein further comprises one of a contiguous slot therein and a segmented slot therein. 5. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall, wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of a fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein said first end having a slot therein disposed circumferentially along said inlet fan duct outer wall. 6. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall, wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of a fan rotor, the slot in the first end being disposed upstream of the fan rotor, and wherein said second end is smaller in width than said body, said second end structured to provide a steep expansion in width connecting to said body. 7. A system to attenuate jet engine noise comprising: a fluid duct for increasing air velocity adjacent to an inlet fan duct outer wall; wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of a fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein at least one of said first end having a slot therein, said second end having a slot therein and said body is structured in an annular form. 8. A system to attenuate jet engine noise comprising: a nacelle surrounding a fan rotor and a fan discharge outlet guide vane; said nacelle having an inlet fan duct outer wall; an acoustic liner attached to said nacelle; a turbine shaft for generating motive forces on said fan rotor; and a fluid duct for increasing air velocity adjacent to said inlet fan duct outer wall; wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of said fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein said first end having a slot therein further comprises one of a contiguous slot therein and a segmented slot therein. 9. The system as in claim 8, wherein said fluid duct is structured of sufficient dimension for allowing a mass flow rate of air within a range of one percent to two percent of said ambient inlet air. 10. The system as in claim 8, wherein said fluid duct is structured to provide a plenum. 11. The system as in claim 8, wherein said fluid duct is substantially disposed within said nacelle. 12. A system to attenuate jet engine noise comprising: a nacelle surrounding a fan rotor and a fan discharge outlet guide vane; said nacelle having an inlet fan duct outer wall; an acoustic liner attached to said nacelle; a turbine shaft for generating motive forces on said fan rotor; and a fluid duct for increasing air velocity adjacent to said inlet fan duct outer wall; wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of said fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein said first end having a slot therein disposed circumferentially along said inlet fan duct outer wall. 13. A system to attenuate jet engine noise comprising: a nacelle surrounding a fan rotor and a fan discharge outlet guide vane; said nacelle having an inlet fan duct outer wall; an acoustic liner attached to said nacelle; a turbine shaft for generating motive forces on said fan rotor; and a fluid duct for increasing air velocity adjacent to said inlet fan duct outer wall; wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of said fan rotor, the slot in the first end being disposed upstream of the fan rotor, and wherein said second end is smaller in width than said body, said second end being structured to provide a steep expansion in width connecting to said body. 14. A system to attenuate jet engine noise comprising: a nacelle surrounding a fan rotor and a fan discharge outlet guide vane; said nacelle having an inlet fan duct outer wall; an acoustic liner attached to said nacelle; a turbine shaft for generating motive forces on said fan rotor; and a fluid duct for increasing air velocity adjacent to said inlet fan duct outer wall; wherein said fluid duct has a first end with a slot therein opening to said inlet fan duct outer wall, a body, and a second end with a slot therein opening to aft of said fan rotor, the slot in the first end being disposed upstream of the fan rotor, wherein said fluid duct is configured such that air flows from the first end, though the body, and is injected aft of the fan rotor from the second end of said fluid duct, and wherein at least one of said first end having a slot therein, said second end having a slot therein and said body is structured in an annular form.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (14)
Swindlehurst Carl E. ; Plunkett Richard B. ; Lennon John F., Acoustic liner and method of making an acoustic liner.
Privett John D. (North Palm Beach FL) Byrne William P. (Jupiter FL) Nolcheff Nick A. (Palm Beach Gardens FL), Cast casing treatment for compressor blades.
Bessette Alan D. (Palm Beach Gardens FL) Davies Daniel O. (West Palm Beach FL) Shade John L. (Jupiter FL), Combined turbine stator cooling and turbine tip clearance control.
Andre Pierre A. (Paris FRX) Thevenin Jean-Claude P. H. P. (Saint-Maur-Des-Fosses FRX) Girault Jean-Pierre Y. B. (Dammarie Les Lys FRX) Richter Gerhard (Boissise Le Roi FRX), Method and device for reducing the noise of turbo-machines.
Andre Pierre A. (Paris FRX) Thevenin Jean-Claude P. H. P. (Saint.-Maur-des-Fosses FRX) Girault Jean-Pierre Y. B. (Dammarie les Lys FRX) Richter Gerhard (Boissise le Roi FRX), Method and device for reducing the noise of turbo-machines.
Raffy Pierre M. (Saint-Germain Laxis FRX) Andre Pierre A. (Paris FRX) Girault Jean-Pierre Y. B. (Dammarie les Lys FRX) Richter Gerhard (Boissise le Roi FRX) Thevenin Jean-Claude P. H. P. (Saint-Maur-, Method and device for reducing the noise of turbo-machines.
Antoine, Angelique Helene; Bouty, Eric Jean-Louis; Thomas, Alain Alphonse Leopold, Process and device for attenuating the noise made in a turbomachine by rotor/stator interaction.
Van Ness, II, Daniel K.; Tews, Brian E.; Rodriguez, Christian O., System and method to improve the exhaust pressure across a RAM air turbine through secondary flow mixing.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.