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IT1042129B - Condotto acustico con trattamento acustico a segmenti in senso pe riferico - Google Patents

Condotto acustico con trattamento acustico a segmenti in senso pe riferico

Info

Publication number
IT1042129B
IT1042129B IT26680/75A IT2668075A IT1042129B IT 1042129 B IT1042129 B IT 1042129B IT 26680/75 A IT26680/75 A IT 26680/75A IT 2668075 A IT2668075 A IT 2668075A IT 1042129 B IT1042129 B IT 1042129B
Authority
IT
Italy
Prior art keywords
acoustic
conduct
segments
sense
treatment
Prior art date
Application number
IT26680/75A
Other languages
English (en)
Original Assignee
Gen Electric
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gen Electric filed Critical Gen Electric
Application granted granted Critical
Publication of IT1042129B publication Critical patent/IT1042129B/it

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
    • F02C7/045—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for noise suppression
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0536—Highspeed fluid intake means [e.g., jet engine intake]

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Exhaust Silencers (AREA)
IT26680/75A 1974-09-03 1975-08-28 Condotto acustico con trattamento acustico a segmenti in senso pe riferico IT1042129B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/503,031 US3937590A (en) 1974-09-03 1974-09-03 Acoustic duct with peripherally segmented acoustic treatment

Publications (1)

Publication Number Publication Date
IT1042129B true IT1042129B (it) 1980-01-30

Family

ID=24000483

Family Applications (1)

Application Number Title Priority Date Filing Date
IT26680/75A IT1042129B (it) 1974-09-03 1975-08-28 Condotto acustico con trattamento acustico a segmenti in senso pe riferico

Country Status (6)

Country Link
US (1) US3937590A (it)
JP (1) JPS594523B2 (it)
DE (1) DE2538887A1 (it)
FR (1) FR2284158A1 (it)
GB (1) GB1516697A (it)
IT (1) IT1042129B (it)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1522558A (en) * 1976-04-05 1978-08-23 Rolls Royce Duct linings
US4104002A (en) * 1976-12-02 1978-08-01 General Electric Company Spiral strip acoustic treatment
US4185688A (en) * 1977-12-22 1980-01-29 General Electric Company Cooler fan noise suppressor
GB2076049B (en) * 1980-05-17 1983-10-26 Rolls Royce Variable acoustic impedance lining
US4692091A (en) * 1985-09-23 1987-09-08 Ritenour Paul E Low noise fan
US5004018A (en) * 1989-07-31 1991-04-02 Manville Corporation Insulated exhaust pipe and manufacture thereof
US5979593A (en) * 1997-01-13 1999-11-09 Hersh Acoustical Engineering, Inc. Hybrid mode-scattering/sound-absorbing segmented liner system and method
US6105206A (en) * 1999-04-13 2000-08-22 Department Of Water And Power City Of Los Angeles Portable electrically powered blower apparatus
BR9900914A (pt) * 1999-04-20 2000-10-24 Edmond Pol Jean Lepoutre Dispositivo controlador de porosidade em tubo helicoidal flexìvel acústico condutor de ar
US6409469B1 (en) 2000-11-21 2002-06-25 Pratt & Whitney Canada Corp. Fan-stator interaction tone reduction
US6439840B1 (en) 2000-11-30 2002-08-27 Pratt & Whitney Canada Corp. Bypass duct fan noise reduction assembly
FR2844304B1 (fr) * 2002-09-10 2004-12-10 Airbus France Couche acoustiquement resistive pour panneau d'attenuation acoustique, panneau utilisant une telle couche
GB0223697D0 (en) * 2002-10-14 2002-11-20 Rolls Royce Plc Acoustic liner for gas turbine engineers
US7861823B2 (en) * 2005-11-04 2011-01-04 United Technologies Corporation Duct for reducing shock related noise
US8602156B2 (en) * 2006-05-19 2013-12-10 United Technologies Corporation Multi-splice acoustic liner
DE102007019762A1 (de) 2007-04-25 2008-10-30 Eads Deutschland Gmbh Schallschutzvorrichtung für ein Strahltriebwerk oder eine Turbine
JP2009062977A (ja) * 2007-08-15 2009-03-26 Rohr Inc 線形音響ライナー
US8936434B2 (en) 2011-02-08 2015-01-20 Echo, Inc. Portable in-line fluid blower
DE102011056826B4 (de) 2011-12-21 2014-06-26 Eads Deutschland Gmbh Schallschutzvorrichtung und damit versehenes Triebwerk und Verfahren zur Bereitstellung
DE102012213622A1 (de) * 2012-08-02 2014-02-06 Siemens Aktiengesellschaft Turbomaschine
USRE48980E1 (en) 2013-03-15 2022-03-22 Raytheon Technologies Corporation Acoustic liner with varied properties
US9169750B2 (en) * 2013-08-17 2015-10-27 ESI Energy Solutions, LLC. Fluid flow noise mitigation structure and method
CN103807220B (zh) * 2013-12-24 2016-03-23 国家电网公司 双旋主动式风机降噪总成
DE102014217089A1 (de) * 2014-08-27 2016-03-03 BSH Hausgeräte GmbH Haartrockner
US10145301B2 (en) 2014-09-23 2018-12-04 Pratt & Whitney Canada Corp. Gas turbine engine inlet
US10378554B2 (en) 2014-09-23 2019-08-13 Pratt & Whitney Canada Corp. Gas turbine engine with partial inlet vane
FR3028886B1 (fr) 2014-11-24 2019-09-13 Safran Aircraft Engines Organe de reduction de bruit de soufflante de turboreacteur
US9938848B2 (en) 2015-04-23 2018-04-10 Pratt & Whitney Canada Corp. Rotor assembly with wear member
US9957807B2 (en) 2015-04-23 2018-05-01 Pratt & Whitney Canada Corp. Rotor assembly with scoop
US10814966B2 (en) 2015-05-25 2020-10-27 Dotterel Technologies Limited Shroud for an aircraft
US10460714B1 (en) 2016-02-05 2019-10-29 United States Of America As Represented By The Administrator Of National Aeronautics And Space Administration Broadband acoustic absorbers
US10724540B2 (en) 2016-12-06 2020-07-28 Pratt & Whitney Canada Corp. Stator for a gas turbine engine fan
US10690146B2 (en) 2017-01-05 2020-06-23 Pratt & Whitney Canada Corp. Turbofan nacelle assembly with flow disruptor
US11097828B2 (en) 2017-07-24 2021-08-24 Dotterel Technologies Limited Shroud
US11721352B2 (en) 2018-05-16 2023-08-08 Dotterel Technologies Limited Systems and methods for audio capture
US20230064984A1 (en) * 2021-08-27 2023-03-02 Dimension Product Solutions LP Noise suppression unit
DE102022119407A1 (de) 2022-08-02 2024-02-08 Bayerische Motoren Werke Aktiengesellschaft Flächenformteil und Kraftfahrzeug mit zumindest einem Flächenformteil
US12085023B2 (en) * 2022-10-03 2024-09-10 General Electric Company Circumferentially varying fan casing treatments for reducing fan noise effects
US12092034B2 (en) * 2022-10-03 2024-09-17 General Electric Company Circumferentially varying fan casing treatments for reducing fan noise effects

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263771A (en) * 1964-05-21 1966-08-02 Seifert Kurt Sound absorbing pipe lining having packing with different densities
US3508838A (en) * 1968-09-16 1970-04-28 Gen Electric Sound suppression of compressors used in gas turbine engines
US3620329A (en) * 1969-12-31 1971-11-16 Glasrock Products Jet engine noise suppressor
FR2191025B1 (it) * 1972-07-04 1975-03-07 Aerospatiale
US3819008A (en) * 1972-10-19 1974-06-25 Gen Electric Broad band acoustic barrier
US3830335A (en) * 1973-05-14 1974-08-20 Nasa Noise suppressor

Also Published As

Publication number Publication date
FR2284158B1 (it) 1981-03-06
JPS594523B2 (ja) 1984-01-30
GB1516697A (en) 1978-07-05
FR2284158A1 (fr) 1976-04-02
DE2538887A1 (de) 1976-03-11
JPS5152801A (it) 1976-05-10
US3937590A (en) 1976-02-10

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