IT1075717B - Rivestimento di condotti - Google Patents
Rivestimento di condottiInfo
- Publication number
- IT1075717B IT1075717B IT22122/77A IT2212277A IT1075717B IT 1075717 B IT1075717 B IT 1075717B IT 22122/77 A IT22122/77 A IT 22122/77A IT 2212277 A IT2212277 A IT 2212277A IT 1075717 B IT1075717 B IT 1075717B
- Authority
- IT
- Italy
- Prior art keywords
- conduits
- coating
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
-
- 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
- F02C7/24—Heat or noise insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13739/76A GB1522558A (en) | 1976-04-05 | 1976-04-05 | Duct linings |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1075717B true IT1075717B (it) | 1985-04-22 |
Family
ID=10028496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22122/77A IT1075717B (it) | 1976-04-05 | 1977-04-05 | Rivestimento di condotti |
Country Status (6)
Country | Link |
---|---|
US (1) | US4122672A (it) |
JP (1) | JPS53123714A (it) |
DE (1) | DE2715295A1 (it) |
FR (1) | FR2347539A1 (it) |
GB (1) | GB1522558A (it) |
IT (1) | IT1075717B (it) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1185101A (en) * | 1980-03-03 | 1985-04-09 | Daniel J. Lahti | Drag-reducing nacelle |
GB2076049B (en) * | 1980-05-17 | 1983-10-26 | Rolls Royce | Variable acoustic impedance lining |
GB2090334B (en) * | 1980-12-29 | 1983-11-16 | Rolls Royce | Damping flutter of ducted fans |
FR2603350B1 (fr) * | 1986-09-02 | 1991-03-29 | Cogema | Ventilateur helicoide a gaine de guidage |
IT1217607B (it) * | 1988-05-16 | 1990-03-30 | Riello Condizionatori Spa | Motoventilatore centrifugo particolarmente silvenzioso |
GB8822798D0 (en) * | 1988-09-28 | 1988-11-02 | Short Brothers Ltd | Ducted fan turbine engine |
GB9014381D0 (en) * | 1990-06-28 | 1990-08-22 | Short Brothers Plc | A composite structural component |
DE4340951A1 (de) * | 1992-12-04 | 1994-06-09 | Grumman Aerospace Corp | Einstückiges Triebwerkeinlaß-Schallrohr |
FR2787513B1 (fr) * | 1998-12-17 | 2001-01-19 | Turbomeca | Dispositif d'echappement multicanal de turbomachine traite acoustiquement |
GB2361035A (en) * | 2000-04-07 | 2001-10-10 | Rolls Royce Plc | Gas turbine engine vane with noise attenuation features |
GB0119608D0 (en) | 2001-08-11 | 2001-10-03 | Rolls Royce Plc | A guide vane assembly |
US6557799B1 (en) | 2001-11-09 | 2003-05-06 | The Boeing Company | Acoustic treated thrust reverser bullnose fairing assembly |
FR2847304B1 (fr) | 2002-11-18 | 2005-07-01 | Airbus France | Nacelle de reacteur d'aeronef a attenuation acoustique |
US7370467B2 (en) * | 2003-07-29 | 2008-05-13 | Pratt & Whitney Canada Corp. | Turbofan case and method of making |
EP1777379A3 (en) * | 2003-07-29 | 2011-03-09 | Pratt & Whitney Canada Corp. | Turbofan case and method of making |
DE102004012929B3 (de) * | 2004-03-17 | 2005-04-21 | Dornier Gmbh | Anordnung zur Lärmreduzierung in Turbofantriebwerken |
GB0415844D0 (en) | 2004-07-15 | 2004-08-18 | Rolls Royce Plc | Noise control |
US7707708B2 (en) * | 2005-09-21 | 2010-05-04 | Rohr, Inc. | Apparatus for making a tubular composite structure |
US7861823B2 (en) * | 2005-11-04 | 2011-01-04 | United Technologies Corporation | Duct for reducing shock related noise |
FR2898940B1 (fr) * | 2006-03-24 | 2008-05-30 | Snecma Sa | Corps central de tuyere de turboreacteur |
GB0608236D0 (en) * | 2006-04-26 | 2006-06-07 | Rolls Royce Plc | Aeroengine noise reduction |
FR2901578B1 (fr) * | 2006-05-23 | 2008-07-25 | Snecma Sa | Corps central pour canal d'echappement d'un turboreacteur, turboreacteur |
US8347633B2 (en) | 2007-07-27 | 2013-01-08 | United Technologies Corporation | Gas turbine engine with variable geometry fan exit guide vane system |
US8459035B2 (en) | 2007-07-27 | 2013-06-11 | United Technologies Corporation | Gas turbine engine with low fan pressure ratio |
US7640961B2 (en) | 2008-03-21 | 2010-01-05 | Rohr, Inc. | Apparatus and method for making a tubular composite barrel |
FR2930764B1 (fr) * | 2008-04-30 | 2010-05-07 | Airbus France | Panneau d'attenuation d'ondes intercale entre une motorisation et une entree d'air d'une nacelle d'aeronef |
US8025499B2 (en) * | 2008-11-03 | 2011-09-27 | Rohr, Inc. | Multi-segment tool and method for composite formation |
FR2941495B1 (fr) * | 2009-01-27 | 2017-09-29 | Turbomeca | Conduit d'echappement insonorise pour turbomoteur |
US7857093B2 (en) * | 2009-03-17 | 2010-12-28 | Spirit Aerosystems, Inc. | Engine inlet deep acoustic liner section |
GB0908128D0 (en) | 2009-05-12 | 2009-06-24 | Rolls Royce Plc | An intake duct liner for a turbofan gas turbine engine |
US8820088B2 (en) * | 2010-07-27 | 2014-09-02 | United Technologies Corporation | Variable area fan nozzle with acoustic system for a gas turbine engine |
GB2483060B (en) * | 2010-08-23 | 2013-05-15 | Rolls Royce Plc | A turbomachine casing assembly |
EP2961959B1 (en) * | 2013-02-26 | 2022-04-06 | Raytheon Technologies Corporation | Acoustic treatment to mitigate fan noise |
US10066548B2 (en) | 2013-03-15 | 2018-09-04 | United Technologies Corporation | Acoustic liner with varied properties |
FR3007063B1 (fr) * | 2013-06-13 | 2015-07-03 | Composite Ind | Piece de materiau abradable pour la fabrication d'un secteur de joint annulaire abradable pour turbomachine et procede de fabrication d'une telle piece |
FR3007064B1 (fr) | 2013-06-13 | 2018-06-29 | Composite Industrie | Secteur de joint annulaire abradable pour turbomachine et procede de fabrication d'une telle piece |
EP2913270B1 (en) | 2014-02-28 | 2016-02-24 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Rotorcraft with at least one main rotor and at least one counter-torque rotor |
EP2913269B1 (en) | 2014-02-28 | 2019-01-16 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Rotorcraft with at least one main rotor and at least one counter-torque rotor |
EP2913271A1 (en) | 2014-02-28 | 2015-09-02 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | Rotorcraft with at least one main rotor and at least one counter-torque rotor |
US9783316B2 (en) | 2015-06-22 | 2017-10-10 | Rohr, Inc. | Acoustic panel assembly with a folding chamber |
GB201511454D0 (en) | 2015-06-30 | 2015-08-12 | Rolls Royce Plc | Aircraft engine nacelle |
US20180135515A1 (en) * | 2016-11-17 | 2018-05-17 | General Electric Company | System and method for fluid acoustic treatment |
US10436118B2 (en) | 2017-06-19 | 2019-10-08 | Rohr, Inc. | Acoustic panel with folding chamber |
DE102020201417A1 (de) | 2020-02-05 | 2021-08-05 | kopter germany GmbH | Rotorsystem für ein Fluggerät |
DE102021200287A1 (de) | 2021-01-14 | 2022-07-14 | MTU Aero Engines AG | Zellenartiger Belag und Schaufelanordnung für eine Turbomaschine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3439774A (en) * | 1966-01-21 | 1969-04-22 | Boeing Co | Sound energy absorbing apparatus |
US3542152A (en) * | 1968-04-08 | 1970-11-24 | Gen Electric | Sound suppression panel |
US3508838A (en) * | 1968-09-16 | 1970-04-28 | Gen Electric | Sound suppression of compressors used in gas turbine engines |
US3821999A (en) * | 1972-09-05 | 1974-07-02 | Mc Donnell Douglas Corp | Acoustic liner |
US3913702A (en) * | 1973-06-04 | 1975-10-21 | Lockheed Aircraft Corp | Cellular sound absorptive structure |
US3948346A (en) * | 1974-04-02 | 1976-04-06 | Mcdonnell Douglas Corporation | Multi-layered acoustic liner |
CA1027002A (en) * | 1974-08-30 | 1978-02-28 | Horst W.W. Hehmann | Phased treatment noise suppressor for acoustic duct applications |
US3937590A (en) * | 1974-09-03 | 1976-02-10 | General Electric Company | Acoustic duct with peripherally segmented acoustic treatment |
-
1976
- 1976-04-05 GB GB13739/76A patent/GB1522558A/en not_active Expired
-
1977
- 1977-04-04 FR FR7710090A patent/FR2347539A1/fr active Granted
- 1977-04-04 US US05/784,637 patent/US4122672A/en not_active Expired - Lifetime
- 1977-04-05 DE DE19772715295 patent/DE2715295A1/de active Granted
- 1977-04-05 JP JP3895677A patent/JPS53123714A/ja active Granted
- 1977-04-05 IT IT22122/77A patent/IT1075717B/it active
Also Published As
Publication number | Publication date |
---|---|
JPS574814B2 (it) | 1982-01-27 |
DE2715295A1 (de) | 1977-10-13 |
JPS53123714A (en) | 1978-10-28 |
FR2347539A1 (fr) | 1977-11-04 |
GB1522558A (en) | 1978-08-23 |
US4122672A (en) | 1978-10-31 |
DE2715295B2 (it) | 1979-11-22 |
FR2347539B1 (it) | 1984-05-11 |
DE2715295C3 (it) | 1980-07-31 |
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