WO1994008540B1 - Active gas turbine (jet) engine noise suppression - Google Patents
Active gas turbine (jet) engine noise suppressionInfo
- Publication number
- WO1994008540B1 WO1994008540B1 PCT/US1993/009739 US9309739W WO9408540B1 WO 1994008540 B1 WO1994008540 B1 WO 1994008540B1 US 9309739 W US9309739 W US 9309739W WO 9408540 B1 WO9408540 B1 WO 9408540B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- jet aircraft
- engine
- acoustic
- actuator
- engines
- Prior art date
Links
- 230000001629 suppression Effects 0.000 title 1
- 230000000694 effects Effects 0.000 claims abstract 2
- 210000003284 Horns Anatomy 0.000 claims 8
- 210000001331 Nose Anatomy 0.000 claims 4
- 230000000051 modifying Effects 0.000 claims 4
- 210000003800 Pharynx Anatomy 0.000 claims 2
- 238000005070 sampling Methods 0.000 claims 2
- 239000003381 stabilizer Substances 0.000 claims 2
- 230000005534 acoustic noise Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000005520 electrodynamics Effects 0.000 claims 1
- 230000002708 enhancing Effects 0.000 claims 1
- 230000003044 adaptive Effects 0.000 abstract 1
- 230000001537 neural Effects 0.000 abstract 1
Abstract
A method and system for reducing the acoustic levels of internal and external sound fields (23 and 24) generated by gas turbine engines (2) has several actuators to generate sound (50, 84, and 115), several sensors to measure the acoustic levels (49 and 69), and one or more controllers (113). The controllers are adaptive self-learning neural networks (112) that control the actuators to generate sound in order to effect the reduction of the internal and external sound field as measured by the sensors.
Claims
1. A system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft having an aircraft fuselage, wings, nacelles, tail, and stabilizer structures, said system comprising a plurality of actuator means to generate sound, a plurality of sensor means to measure said acoustic levels, said sensor means comprising microphone means located in and around the engines, and on a plurality of aircraft structures selected from among the aircraft fuselage, wings, nacelles, tail, and stabilizer structures, one or more controller means to control said actuators to generate sound in order to effect the reduction of the internal and external sound field as measured by the plurality of sensors.
2. The system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft of claim 1 wherein said actuator means comprises an air modulator- based acoustic source that receives a flow of compressed air derived from compression stages of one or more of said engines.
3. The system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft of claim 1 wherein said engines have external far and near acoustic radiation fields and said sensor means comprise first error sensors located inside the engine, and second error sensors located in the far and near external acoustic radiation fields of the engine.
4. The system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft of claim 1 wherein said controller means receives signals from a plurality of said sensors and comprises means to control a plurality of actuator means simultaneously to suppress acoustic noise from multiple engines.
5. The system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft of claim 1 wherein said engines provide signals to keyphasor or tachometer means and said controller receives rotational cycle reference signals from the keyphasor or tachometer means, wherein said system learns and adapts in real time to changes in residual acoustic fields.
6. The system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of a jet aircraft of claim 5, wherein said engines provide a rotational cycle reference signal and said sensor means provide signals to said controller and said system further comprises means to convert signals from the sensors to digital samples, said means to convert operating at a sampling rate, and rotational speed synchronization means to synchronize the sampling rate to the engines rotational cycle reference signal.
7. A jet aircraft having an active system for reducing the acoustic levels of internal and external sound fields generated by gas turbine engines of the jet aircraft comprising a plurality of actuator means to generate sound, a plurality of sensor means to measure said acoustic levels, said sensor means comprising one or more controller means for controlling said actuators to radiate acoustic energy to cancel acoustic levels measured by said sensor means, said jet engine having a nacelle comprising a cowl, an inlet duct, engine and cowl panels, a bypass duct, an exhaust duct that comprises a tailpipe extension, thrust reverser, and tailpipe, said nacelle having zones containing noise source sensors, internal error sensors, external error sensors, and canceling actuators.
8. The jet aircraft of claim 7 having forward and rearward ends, wherein said nacelle has an inlet end and comprises a nose cowl having an inlet duct at the inlet end of said nacelle, an engine and cowl panel having a bypass duct immediately behind said nose cowl, a tailpipe extension behind said engine and cowl panel, said tailpipe extension having an exhaust duct and a thrust reverser and tail pipe behind said tailpipe extension, wherein said zones comprising noise source sensors comprise a first noise source sensor zone in the forward end of said engine and cowl panel, a second noise source sensor zone in the forward end of said tailpipe extension, and wherein said zones comprising error sensors comprise a first error sensor zone in the forward end of said nose cowl, a second error sensor zone in the rearward end of said engine and cowl panel, and a third error sensor zone in said thrust reverser and tailpipe, and actuator zones comprising a first actuator zone in the inlet duct of said nose cowl aft of said first error sensor zone, a second actuator zone in the bypass duct of said engine and cowl panel between said first noise source sensor zone and said second error sensor zone, and a third actuator zone located in the exhaust duct of said tailpipe extension located aft of said second noise source sensor zone.
9. The jet aircraft of claim 8 wherein the actuators located in one or more of said first, second and third actuator zones comprise air stream modulators.
10. The jet aircraft of claim 8 wherein the actuators located in one or more of said first, second and third actuator zones comprise piezoceramic actuators.
11. The jet aircraft of claim 9 wherein one or more of said air stream modulators comprises an air modulator actuator horn having a mouth opening into an ambient bypass air flow, said horn comprising throat means to provide impedance loading to enhance performance, and horn section means to match the impedance of the ambient bypass air flow at the mouth of the horn.
12. The jet aircraft of claim 11 wherein said horn comprises a mouth having a flange attached to an entry hole in an engine bypass duct wall, a plenum, and a pipe manifold attached to a source of air.
13. The jet aircraft of claim 12 wherein said engine comprises compressor stages and bleed ports on the engine's compressor stages, and wherein said pipe manifold is adapted to receive compressed air from said bleed ports.
14. The jet aircraft of claim 13 wherein said throat means of said horn provides an exit from the plenum, and said mouth of said horn provides an entrance back into a bypass duct, each engine having a plurality of air modulator actuators.
15. The jet aircraft of claim 14 wherein said horn comprises driver means.
16. The jet aircraft of claim 15 wherein said driver means comprises a stiffness-controlled, electrodynamic actuator.
17. The jet aircraft of claim 7 wherein said actuator means comprise acoustic loudspeakers located in one or more of the inlet duct, a bypass duct, and the forward end of the tailpipe.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002147183A CA2147183A1 (en) | 1992-10-13 | 1993-10-12 | Active gas turbine (jet) engine noise suppression |
EP94901158A EP0667757A4 (en) | 1992-10-13 | 1993-10-12 | Active gas turbine (jet) engine noise suppression. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/961,612 | 1992-10-13 | ||
US07/961,612 US5386689A (en) | 1992-10-13 | 1992-10-13 | Active gas turbine (jet) engine noise suppression |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994008540A1 WO1994008540A1 (en) | 1994-04-28 |
WO1994008540B1 true WO1994008540B1 (en) | 1994-06-09 |
Family
ID=25504741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1993/009739 WO1994008540A1 (en) | 1992-10-13 | 1993-10-12 | Active gas turbine (jet) engine noise suppression |
Country Status (5)
Country | Link |
---|---|
US (1) | US5386689A (en) |
EP (1) | EP0667757A4 (en) |
CA (1) | CA2147183A1 (en) |
IL (1) | IL107276A0 (en) |
WO (1) | WO1994008540A1 (en) |
Families Citing this family (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5515444A (en) * | 1992-10-21 | 1996-05-07 | Virginia Polytechnic Institute And State University | Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors |
US5844996A (en) * | 1993-02-04 | 1998-12-01 | Sleep Solutions, Inc. | Active electronic noise suppression system and method for reducing snoring noise |
US6137886A (en) * | 1994-07-18 | 2000-10-24 | Cooper Tire & Rubber Company | Active vibration control method and apparatus |
AU3277295A (en) * | 1994-07-28 | 1996-02-22 | Boeing Company, The | Active control of tone noise in engine ducts |
CA2200053C (en) * | 1994-10-13 | 2005-02-22 | The Boeing Company | Jet engine fan noise reduction system utilizing electro-pneumatic transducers |
US5575144A (en) * | 1994-11-28 | 1996-11-19 | General Electric Company | System and method for actively controlling pressure pulses in a gas turbine engine combustor |
US5478199A (en) * | 1994-11-28 | 1995-12-26 | General Electric Company | Active low noise fan assembly |
US5636287A (en) * | 1994-11-30 | 1997-06-03 | Lucent Technologies Inc. | Apparatus and method for the active control of air moving device noise |
US6005952A (en) * | 1995-04-05 | 1999-12-21 | Klippel; Wolfgang | Active attenuation of nonlinear sound |
EP0823090B1 (en) * | 1995-04-27 | 2005-01-26 | Northrop Grumman Corporation | Adaptive filtering neural network classifier |
US5668744A (en) * | 1995-05-05 | 1997-09-16 | Owens-Corning Fiberglas Technology Inc. | Active noise control using piezoelectric sensors and actuators |
JP3654980B2 (en) * | 1995-11-30 | 2005-06-02 | 富士通株式会社 | Active noise control device and waveform conversion device |
US5778081A (en) * | 1996-03-04 | 1998-07-07 | United Technologies Corp | Active noise control using phased-array active resonators |
US5857321A (en) * | 1996-06-11 | 1999-01-12 | General Electric Company | Controller with neural network for estimating gas turbine internal cycle parameters |
US6002778A (en) * | 1996-08-07 | 1999-12-14 | Lord Corporation | Active structural control system and method including active vibration absorbers (AVAS) |
US5802184A (en) * | 1996-08-15 | 1998-09-01 | Lord Corporation | Active noise and vibration control system |
JP3785703B2 (en) * | 1996-10-31 | 2006-06-14 | 株式会社明電舎 | Time series data identification method and identification apparatus |
US5838588A (en) * | 1996-12-13 | 1998-11-17 | Siemens Corporate Research, Inc. | Graphical user interface system for steam turbine operating conditions |
US5832421A (en) * | 1996-12-13 | 1998-11-03 | Siemens Corporate Research, Inc. | Method for blade temperature estimation in a steam turbine |
US5966452A (en) * | 1997-03-07 | 1999-10-12 | American Technology Corporation | Sound reduction method and system for jet engines |
US5865168A (en) * | 1997-03-14 | 1999-02-02 | Nellcor Puritan Bennett Incorporated | System and method for transient response and accuracy enhancement for sensors with known transfer characteristics |
US5949989A (en) * | 1997-06-27 | 1999-09-07 | Chrysler Corporation | Method of designing and developing engine induction systems which minimize engine source noise |
FR2769396B1 (en) * | 1997-10-02 | 2000-11-10 | Eurocopter France | DEVICE FOR REDUCING THE NOISE OF RAIES INSIDE A ROTATING-SAIL AIRCRAFT, IN PARTICULAR A HELICOPTER |
DE59903184D1 (en) * | 1998-07-22 | 2002-11-28 | Friedmund Nagel | DEVICE AND METHOD FOR ACTIVE REDUCTION OF THE NOISE EMISSION FROM JET ENGINES AND THEIR DIAGNOSIS |
US6996244B1 (en) * | 1998-08-06 | 2006-02-07 | Vulcan Patents Llc | Estimation of head-related transfer functions for spatial sound representative |
US20020013519A1 (en) * | 2000-06-14 | 2002-01-31 | Scott Adams | Secure test and test result delivery system |
US6493689B2 (en) * | 2000-12-29 | 2002-12-10 | General Dynamics Advanced Technology Systems, Inc. | Neural net controller for noise and vibration reduction |
US6959093B2 (en) * | 2001-04-12 | 2005-10-25 | Siemens Vdo Automotive Inc. | Low frequency active noise control |
DE10135566B4 (en) * | 2001-07-20 | 2009-12-10 | Eads Deutschland Gmbh | Method and system for actively reducing the sound emission of engines |
US6879922B2 (en) * | 2001-09-19 | 2005-04-12 | General Electric Company | Systems and methods for suppressing pressure waves using corrective signal |
US20030138147A1 (en) * | 2002-01-17 | 2003-07-24 | Yandi Ongkojoyo | Object recognition system for screening device |
US7293401B2 (en) * | 2002-03-20 | 2007-11-13 | The Regents Of The University Of California | Jet engine noise suppressor |
US7085388B2 (en) * | 2002-06-14 | 2006-08-01 | The Boeing Company | High frequency jet nozzle actuators for jet noise reduction |
US20040125922A1 (en) * | 2002-09-12 | 2004-07-01 | Specht Jeffrey L. | Communications device with sound masking system |
DE102004012929B3 (en) * | 2004-03-17 | 2005-04-21 | Dornier Gmbh | Noise reduction system for gas turbine engine for aircraft has surface cladding for hot gas channel downstream of turbine, with circular perforated plates covering large ends of frustoconical spaces |
US20070031237A1 (en) * | 2005-07-29 | 2007-02-08 | General Electric Company | Method and apparatus for producing wind energy with reduced wind turbine noise |
US9018512B2 (en) * | 2007-12-21 | 2015-04-28 | The Boeing Company | Thermoelectric generation system |
US20090226303A1 (en) * | 2008-03-05 | 2009-09-10 | Grabowski Zbigniew M | Variable area fan nozzle fan flutter management system |
US9074531B2 (en) | 2008-03-05 | 2015-07-07 | United Technologies Corporation | Variable area fan nozzle fan flutter management system |
US8111832B2 (en) * | 2008-04-16 | 2012-02-07 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method of adjusting acoustic impedances for impedance-tunable acoustic segments |
US8331577B2 (en) * | 2008-07-03 | 2012-12-11 | Hewlett-Packard Development Company, L.P. | Electronic device having active noise control with an external sensor |
DE102009045463A1 (en) | 2009-10-07 | 2011-03-31 | Airbus Operations Gmbh | Sound reducing device for use in e.g. airliner, in airport, has explosion acoustic source producing counter noise, and control device controlling source based on sound characteristics such that sound and counter noise are mutually reduced |
GB2476244B (en) * | 2009-12-16 | 2013-04-03 | Rolls Royce Plc | A transducer assembly |
US8309045B2 (en) | 2011-02-11 | 2012-11-13 | General Electric Company | System and method for controlling emissions in a combustion system |
CH704823A1 (en) | 2011-04-01 | 2012-10-15 | Alstom Technology Ltd | Intake manifold for a gas turbine and gas turbine. |
JP5782833B2 (en) * | 2011-05-26 | 2015-09-24 | 株式会社Ihi | Fan noise reduction device |
DE102013225046A1 (en) * | 2013-12-05 | 2015-06-11 | Lufthansa Technik Ag | Aircraft engine, passenger aircraft, active noise reduction method, and method of retrofitting a gas turbine aircraft engine |
US9752959B2 (en) * | 2014-03-13 | 2017-09-05 | Siemens Energy, Inc. | Nonintrusive transceiver and method for characterizing temperature and velocity fields in a gas turbine combustor |
CN103971908B (en) * | 2014-05-06 | 2016-03-09 | 国家电网公司 | A kind of transformer noise suppressing method |
JP6840670B2 (en) | 2014-12-19 | 2021-03-10 | ゼネラル・エレクトリック・カンパニイ | Active noise control system |
US9442496B1 (en) | 2015-09-18 | 2016-09-13 | Amazon Technologies, Inc. | Active airborne noise abatement |
US10344711B2 (en) * | 2016-01-11 | 2019-07-09 | Rolls-Royce Corporation | System and method of alleviating blade flutter |
US10196152B2 (en) | 2016-03-29 | 2019-02-05 | Simmonds Precision Products, Inc. | Sensor data processing for condition monitoring systems |
WO2017183999A1 (en) | 2016-04-20 | 2017-10-26 | General Electric Company | Active noise cancelation systems and devices |
US10062378B1 (en) * | 2017-02-24 | 2018-08-28 | International Business Machines Corporation | Sound identification utilizing periodic indications |
US10465539B2 (en) * | 2017-08-04 | 2019-11-05 | Pratt & Whitney Canada Corp. | Rotor casing |
KR102263250B1 (en) * | 2019-08-22 | 2021-06-14 | 엘지전자 주식회사 | Engine sound cancellation device and engine sound cancellation method |
US20220068057A1 (en) * | 2020-12-17 | 2022-03-03 | General Electric Company | Cloud-based acoustic monitoring, analysis, and diagnostic for power generation system |
US11965697B2 (en) | 2021-03-02 | 2024-04-23 | General Electric Company | Multi-fluid heat exchanger |
EP4341930A1 (en) * | 2022-03-24 | 2024-03-27 | Ziehl-Abegg Se | Method for actively monitoring sound emissions of turbomachinery, system comprising turbomachinery, and device for carrying out the method |
US11927134B1 (en) | 2023-01-27 | 2024-03-12 | General Electric Company | Gas turbine engine having a heat exchanger located in an annular duct |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3936606A (en) * | 1971-12-07 | 1976-02-03 | Wanke Ronald L | Acoustic abatement method and apparatus |
US4044203A (en) * | 1972-11-24 | 1977-08-23 | National Research Development Corporation | Active control of sound waves |
FR2370170A1 (en) * | 1976-11-05 | 1978-06-02 | Snecma | METHOD AND DEVICE FOR REDUCING TURBOMACHINE NOISE |
US4489441A (en) * | 1979-11-21 | 1984-12-18 | Sound Attenuators Limited | Method and apparatus for cancelling vibration |
GB2126837B (en) * | 1982-08-19 | 1986-07-23 | British Aerospace | Noise suppression |
US4562589A (en) * | 1982-12-15 | 1985-12-31 | Lord Corporation | Active attenuation of noise in a closed structure |
FR2572615B1 (en) * | 1984-10-29 | 1988-10-14 | Bertin & Cie | PNEUMATIC SPEAKER WITH CONTINUOUS FLOW PRESSURE FLOW |
US4689821A (en) * | 1985-09-23 | 1987-08-25 | Lockheed Corporation | Active noise control system |
GB2204916B (en) * | 1987-05-19 | 1991-10-16 | British Gas Plc | A silencer |
JPH01245795A (en) * | 1988-03-28 | 1989-09-29 | Daikin Ind Ltd | Electronic silencer |
JP2598483B2 (en) * | 1988-09-05 | 1997-04-09 | 日立プラント建設株式会社 | Electronic silencing system |
US5138664A (en) * | 1989-03-25 | 1992-08-11 | Sony Corporation | Noise reducing device |
JPH0787337B2 (en) * | 1990-01-05 | 1995-09-20 | ヤマハ株式会社 | Acoustic signal processor |
US5022082A (en) * | 1990-01-12 | 1991-06-04 | Nelson Industries, Inc. | Active acoustic attenuation system with reduced convergence time |
US5010576A (en) * | 1990-01-22 | 1991-04-23 | Westinghouse Electric Corp. | Active acoustic attenuation system for reducing tonal noise in rotating equipment |
US4987598A (en) * | 1990-05-03 | 1991-01-22 | Nelson Industries | Active acoustic attenuation system with overall modeling |
JPH0834647B2 (en) * | 1990-06-11 | 1996-03-29 | 松下電器産業株式会社 | Silencer |
-
1992
- 1992-10-13 US US07/961,612 patent/US5386689A/en not_active Expired - Fee Related
-
1993
- 1993-10-12 WO PCT/US1993/009739 patent/WO1994008540A1/en not_active Application Discontinuation
- 1993-10-12 EP EP94901158A patent/EP0667757A4/en not_active Withdrawn
- 1993-10-12 CA CA002147183A patent/CA2147183A1/en not_active Abandoned
- 1993-10-13 IL IL10727693A patent/IL107276A0/en unknown
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