JPS4993713A - - Google Patents
Info
- Publication number
- JPS4993713A JPS4993713A JP48117027A JP11702773A JPS4993713A JP S4993713 A JPS4993713 A JP S4993713A JP 48117027 A JP48117027 A JP 48117027A JP 11702773 A JP11702773 A JP 11702773A JP S4993713 A JPS4993713 A JP S4993713A
- Authority
- JP
- Japan
- Prior art keywords
- barriers
- duct
- barrier
- width
- wall
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
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
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Exhaust Silencers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00299159A US3819008A (en) | 1972-10-19 | 1972-10-19 | Broad band acoustic barrier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS4993713A true JPS4993713A (ja) | 1974-09-06 |
Family
ID=23153552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP48117027A Pending JPS4993713A (ja) | 1972-10-19 | 1973-10-19 |
Country Status (7)
Country | Link |
---|---|
US (1) | US3819008A (ja) |
JP (1) | JPS4993713A (ja) |
BE (1) | BE806107A (ja) |
DE (1) | DE2351093A1 (ja) |
FR (1) | FR2203936A1 (ja) |
GB (1) | GB1441404A (ja) |
IT (1) | IT995569B (ja) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3937590A (en) * | 1974-09-03 | 1976-02-10 | General Electric Company | Acoustic duct with peripherally segmented acoustic treatment |
US4300656A (en) * | 1980-09-11 | 1981-11-17 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Multiple pure tone elimination strut assembly |
US4531356A (en) * | 1981-06-15 | 1985-07-30 | The Garrett Corporation | Intake vortex whistle silencing apparatus and methods |
US4439104A (en) * | 1981-06-15 | 1984-03-27 | The Garrett Corporation | Compressor inlet guide vane and vortex-disturbing member assembly |
US4595340A (en) * | 1984-07-30 | 1986-06-17 | General Electric Company | Gas turbine bladed disk assembly |
US4817756A (en) * | 1985-08-26 | 1989-04-04 | Aeronautic Development Corp. Ltd. | Quiet nacelle system and hush kit |
US4844695A (en) * | 1988-07-05 | 1989-07-04 | Pratt & Whitney Canada Inc. | Variable flow radial compressor inlet flow fences |
US5373691A (en) * | 1993-06-23 | 1994-12-20 | Allied-Signal Inc. | Inlet guide vane dewhistler |
US5709529A (en) * | 1995-11-14 | 1998-01-20 | Westinghouse Electric Corporation | Optimization of turbomachinery harmonics |
US6309176B1 (en) | 1999-11-12 | 2001-10-30 | Siemens Automotive Inc. | Noise attenuating sound resonator for automotive cooling module shroud |
US8602156B2 (en) * | 2006-05-19 | 2013-12-10 | United Technologies Corporation | Multi-splice acoustic liner |
US7966831B2 (en) * | 2007-08-28 | 2011-06-28 | General Electric Company | Apparatus and method for suppressing dynamic pressure instability in bleed duct |
US7857093B2 (en) * | 2009-03-17 | 2010-12-28 | Spirit Aerosystems, Inc. | Engine inlet deep acoustic liner section |
FR2965251B1 (fr) * | 2010-09-28 | 2013-06-28 | Snecma | Nacelle de turboreacteur a bras munis de panneaux de traitement acoustique passif du bruit |
GB201407313D0 (en) * | 2014-04-25 | 2014-06-11 | Rolls Royce Plc | Intake liner |
US10378554B2 (en) | 2014-09-23 | 2019-08-13 | Pratt & Whitney Canada Corp. | Gas turbine engine with partial inlet vane |
US10145301B2 (en) | 2014-09-23 | 2018-12-04 | Pratt & Whitney Canada Corp. | Gas turbine engine inlet |
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 |
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 |
GB202007011D0 (en) * | 2020-05-13 | 2020-06-24 | Rolls Royce Plc | Nacelle for gas turbine engine |
GB2600386B (en) * | 2020-10-09 | 2023-07-26 | Rolls Royce Plc | An improved turbofan gas turbine engine |
US11970957B2 (en) * | 2021-08-19 | 2024-04-30 | General Electric Company | Acoustic turbofan airfoil apparatus |
US11767790B2 (en) * | 2021-08-23 | 2023-09-26 | General Electric Company | Object direction mechanism for turbofan engine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2759554A (en) * | 1952-08-04 | 1956-08-21 | Bolt Beranek & Newman | Acoustic absorber |
US2853147A (en) * | 1956-02-17 | 1958-09-23 | Pittsburgh Corning Corp | Acoustic filters for air ducts |
US3113634A (en) * | 1958-07-11 | 1963-12-10 | Bolt Beranek & Newman | Sound absorbing panel for lining a duct |
US3144913A (en) * | 1962-08-31 | 1964-08-18 | Garrett Corp | Method and apparatus for attenuating helical acoustic pressure waves |
US3533486A (en) * | 1968-11-08 | 1970-10-13 | Gen Electric | Jet engine silencer with retractable sound absorbing body |
US3610262A (en) * | 1969-10-07 | 1971-10-05 | Boeing Co | Stowable vane sonic throat inlet for jet aircraft noise suppression |
-
1972
- 1972-10-19 US US00299159A patent/US3819008A/en not_active Expired - Lifetime
-
1973
- 1973-10-03 IT IT29694/73A patent/IT995569B/it active
- 1973-10-03 GB GB4620973A patent/GB1441404A/en not_active Expired
- 1973-10-11 DE DE19732351093 patent/DE2351093A1/de active Pending
- 1973-10-15 BE BE136717A patent/BE806107A/xx unknown
- 1973-10-19 JP JP48117027A patent/JPS4993713A/ja active Pending
- 1973-10-19 FR FR7337314A patent/FR2203936A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2203936A1 (ja) | 1974-05-17 |
IT995569B (it) | 1975-11-20 |
US3819008A (en) | 1974-06-25 |
BE806107A (fr) | 1974-02-01 |
GB1441404A (en) | 1976-06-30 |
DE2351093A1 (de) | 1974-05-02 |
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