JPH10503817A - エアフォイル騒音制御 - Google Patents
エアフォイル騒音制御Info
- Publication number
- JPH10503817A JPH10503817A JP8505835A JP50583596A JPH10503817A JP H10503817 A JPH10503817 A JP H10503817A JP 8505835 A JP8505835 A JP 8505835A JP 50583596 A JP50583596 A JP 50583596A JP H10503817 A JPH10503817 A JP H10503817A
- Authority
- JP
- Japan
- Prior art keywords
- airfoil
- leading edge
- fluid
- pressure
- flow
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/148—Blades with variable camber, e.g. by ejection of fluid
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 正圧面、負圧面、前縁、弦方向を有するエアフォイルにて、該エアフォイ ルは、前記各面を流通する流体のフローにさらされ、前記流体のフローは定期的 に変動する圧力及びフローのフィールドを画定し、前記エアフォイルと前記流体 のフローとの相互作用によって、特性周波数及び波長を有する音響ノイズが生成 されるものにおいて、 前記エアフォイルの前縁に隣接して配置された、反対称周期的圧力フィールド の生成手段を有し、これにより前記音響ノイズが減少されることを特徴とするエ アフォイル。 2. 前記生成手段は、前記エアフォイルに可動部を更に有し、この可動部は、 前記前縁に設けられていることを特徴とする請求項1記載のエアフォイル。 3. 前縁生成手段は、前記前縁に隣接して設けられた、体積が変動する吸収源 を更に有することを特徴とする請求項1記載のエアフォイル。 4. 前記吸収源は、前記エアフォイル内に設けられてその内部で可動であるピ ストンを有し、該ピストンは、互いに略表裏をなす第一の側面と第二の側面とを 有し、前記第一の側面は、前記正圧面近傍 の前記流体のフローの一部と流体的に連通し、前記第二の側面は、前記負圧面近 傍の流体のフローの一部と流体的に連通していることを特徴とする請求項3記載 のエアフォイル。 5. 前記ピストンの第一の側面と前記正圧面の流体のフローの一部との流体的 連通は、前記正圧面につながる連続面を形成する多孔質バリアによって得られ、 前記ピストンの第二の側面と前記負圧面の流体のフローの一部との流体的連通 は、前記負圧面につながる連続面を形成する多孔質バリアによって得られること を特徴とする請求項4記載のエアフォイル。 6. 前記吸収源は、前記音響ノイズの周波数で共振するように、その音響イン ピーダンスが調整された、受動的共振室を更に有することを特徴とする請求項4 記載のエアフォイル。 7. 前記生成手段は、前記前縁から1.0波長内の位置に配置されることを特 徴とする請求項1記載のエアフォイル。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/278,439 | 1994-07-21 | ||
US08/278,439 US5613649A (en) | 1994-07-21 | 1994-07-21 | Airfoil noise control |
PCT/US1995/009075 WO1996003584A1 (en) | 1994-07-21 | 1995-07-19 | Airfoil noise control |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10503817A true JPH10503817A (ja) | 1998-04-07 |
JP3854309B2 JP3854309B2 (ja) | 2006-12-06 |
Family
ID=23064979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50583596A Expired - Fee Related JP3854309B2 (ja) | 1994-07-21 | 1995-07-19 | エアフォイル騒音制御 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5613649A (ja) |
EP (1) | EP0771395B1 (ja) |
JP (1) | JP3854309B2 (ja) |
DE (1) | DE69519029T2 (ja) |
WO (1) | WO1996003584A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007513282A (ja) * | 2003-12-06 | 2007-05-24 | エーアーデーエス・ドイチュラント・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | ステータの表面流れを変えることによりターボエンジンの騒音を減少させる方法 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5975462A (en) * | 1996-10-30 | 1999-11-02 | The United States Of America As Represented By The Secretary Of The Navy | Integrated propulsion/lift/control system for aircraft and ship applications |
US6543719B1 (en) * | 1997-06-05 | 2003-04-08 | Mcdonnell Douglas Helicopter Co. | Oscillating air jets for implementing blade variable twist, enhancing engine and blade efficiency, and reducing drag, vibration, download and ir signature |
US6139259A (en) * | 1998-10-29 | 2000-10-31 | General Electric Company | Low noise permeable airfoil |
US8136767B2 (en) * | 2006-01-03 | 2012-03-20 | General Electric Company | Method and system for flow control with arrays of dual bimorph synthetic jet fluidic actuators |
FR2906563B1 (fr) * | 2006-09-28 | 2011-12-09 | Snecma | Methode de traitement acoustique d'un moteur d'avion comprenant une turbosoufflante. aube traitee |
US8016567B2 (en) * | 2007-01-17 | 2011-09-13 | United Technologies Corporation | Separation resistant aerodynamic article |
BRPI0701438B1 (pt) | 2007-04-13 | 2019-11-19 | Embraer Empresa Brasileira De Aeronautica S A | superfície de controle de aeronave em combinação em combinação com um selo aerodinâmico para redução do ruído gerado por superfícies de controle de aeronaves |
US7607287B2 (en) * | 2007-05-29 | 2009-10-27 | United Technologies Corporation | Airfoil acoustic impedance control |
US8425191B2 (en) * | 2008-05-30 | 2013-04-23 | United Technologies Corporation | Propfan assembly |
US8973364B2 (en) | 2008-06-26 | 2015-03-10 | United Technologies Corporation | Gas turbine engine with noise attenuating variable area fan nozzle |
US7984787B2 (en) * | 2009-01-23 | 2011-07-26 | Dresser-Rand Company | Fluid-carrying conduit and method with noise attenuation |
US8061961B2 (en) * | 2009-01-23 | 2011-11-22 | Dresser-Rand Company | Fluid expansion device and method with noise attenuation |
US8739515B2 (en) * | 2009-11-24 | 2014-06-03 | United Technologies Corporation | Variable area fan nozzle cowl airfoil |
FR2968048B1 (fr) * | 2010-11-30 | 2017-10-20 | Snecma | Aube de turbomachine comprenant une source electroacoustique amelioree, rangee d'aubes directrices de sortie et turbomachine comprenant une telle aube |
EP2700068A4 (en) | 2011-04-20 | 2016-01-13 | Dresser Rand Co | GROUP OF RESONATORS WITH MULTIPLE DEGREES OF FREEDOM |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1918536A (en) * | 1929-10-17 | 1933-07-18 | D Roger W Griswold | Aeroplane wing |
US2173832A (en) * | 1938-01-10 | 1939-09-26 | Delmer S Fahrney | Aircraft wing |
US2340417A (en) * | 1941-10-07 | 1944-02-01 | Clyde E Ellett | Noiseless propeller |
US2988302A (en) * | 1959-01-14 | 1961-06-13 | Gen Sound Control Inc | Silencing means for aircraft |
US3093350A (en) * | 1960-08-04 | 1963-06-11 | Dehavilland Aircraft | Aircraft wing with nose flap and boundary layer control |
US3174282A (en) * | 1963-04-19 | 1965-03-23 | Ryan Aeronautical Co | Asymmetrical jet nozzle noise suppressor |
DE1268979B (de) * | 1966-07-01 | 1968-05-22 | Hermann Papst | UEberstroemte Wand, insbesondere bei Luftfahrzeugen, mit Schlitzen zur Absaugung derGrenzschicht |
GB2093152A (en) * | 1981-02-12 | 1982-08-25 | Walmsley Sidney | Boundary Layer Control |
DE3342421A1 (de) * | 1983-11-24 | 1985-06-05 | Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn | Verfahren zur stabilisierenden beeinflussung abgeloester laminarer grenzschichten |
JPS60142004A (ja) * | 1983-12-28 | 1985-07-27 | Toshiba Corp | 軸流タ−ボ機翼 |
US4749150A (en) * | 1985-12-24 | 1988-06-07 | Rohr Industries, Inc. | Turbofan duct with noise suppression and boundary layer control |
GB8610297D0 (en) * | 1986-04-28 | 1986-10-01 | Rolls Royce | Turbomachinery |
US4802642A (en) * | 1986-10-14 | 1989-02-07 | The Boeing Company | Control of laminar flow in fluids by means of acoustic energy |
JP2615823B2 (ja) * | 1988-04-28 | 1997-06-04 | 松下電器産業株式会社 | 羽根車の翼型ブレードの製造方法 |
US5141182A (en) * | 1990-06-01 | 1992-08-25 | General Electric Company | Gas turbine engine fan duct base pressure drag reduction |
FR2681833A1 (fr) * | 1991-09-26 | 1993-04-02 | Dath Albert | Systeme hypersustentateur facilitant les decollages et les atterrissages des mobiles aeriens. |
DE4207103C1 (ja) * | 1992-03-06 | 1993-09-16 | Deutsche Aerospace Airbus Gmbh, 21129 Hamburg, De | |
US5348256A (en) * | 1992-05-13 | 1994-09-20 | The Boeing Company | Supersonic aircraft and method |
US5291672A (en) * | 1992-12-09 | 1994-03-08 | General Electric Company | Sound suppression mixer |
US5420383A (en) * | 1993-10-22 | 1995-05-30 | United Technologies Corporation | Anti-sound arrangement for multi-stage blade cascade |
US5423658A (en) * | 1993-11-01 | 1995-06-13 | General Electric Company | Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading |
-
1994
- 1994-07-21 US US08/278,439 patent/US5613649A/en not_active Expired - Fee Related
-
1995
- 1995-07-19 JP JP50583596A patent/JP3854309B2/ja not_active Expired - Fee Related
- 1995-07-19 DE DE69519029T patent/DE69519029T2/de not_active Expired - Fee Related
- 1995-07-19 WO PCT/US1995/009075 patent/WO1996003584A1/en active IP Right Grant
- 1995-07-19 EP EP95928665A patent/EP0771395B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007513282A (ja) * | 2003-12-06 | 2007-05-24 | エーアーデーエス・ドイチュラント・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | ステータの表面流れを変えることによりターボエンジンの騒音を減少させる方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0771395A1 (en) | 1997-05-07 |
EP0771395B1 (en) | 2000-10-04 |
WO1996003584A1 (en) | 1996-02-08 |
US5613649A (en) | 1997-03-25 |
DE69519029D1 (de) | 2000-11-09 |
JP3854309B2 (ja) | 2006-12-06 |
DE69519029T2 (de) | 2001-05-17 |
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