CH581270A5 - - Google Patents

Info

Publication number
CH581270A5
CH581270A5 CH931273A CH931273A CH581270A5 CH 581270 A5 CH581270 A5 CH 581270A5 CH 931273 A CH931273 A CH 931273A CH 931273 A CH931273 A CH 931273A CH 581270 A5 CH581270 A5 CH 581270A5
Authority
CH
Switzerland
Application number
CH931273A
Original Assignee
Bolt Beranek & Newman
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 Bolt Beranek & Newman filed Critical Bolt Beranek & Newman
Publication of CH581270A5 publication Critical patent/CH581270A5/xx

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/10—Influencing air flow over aircraft surfaces by affecting boundary layer flow using other surface properties, e.g. roughness
    • 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
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/282—Selecting composite materials, e.g. blades with reinforcing filaments
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • 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
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/20—Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/22—Boundary layer controls by using a surface having multiple apertures of relatively small openings other than slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/28—Boundary layer controls at propeller or rotor blades
    • 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
    • Y02T50/10—Drag reduction
    • 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)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Composite Materials (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
CH931273A 1972-01-27 1973-06-26 CH581270A5 (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22122372A 1972-01-27 1972-01-27

Publications (1)

Publication Number Publication Date
CH581270A5 true CH581270A5 (xx) 1976-10-29

Family

ID=22826905

Family Applications (1)

Application Number Title Priority Date Filing Date
CH931273A CH581270A5 (xx) 1972-01-27 1973-06-26

Country Status (2)

Country Link
US (1) US3779338A (xx)
CH (1) CH581270A5 (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237976A2 (de) * 1986-03-19 1987-09-23 Alcatel SEL Aktiengesellschaft Axiallüfter

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115210A (en) * 1974-07-02 1976-02-06 Rotoron Inc Zatsuongenshono fuan
DE3221465C2 (de) * 1981-06-15 1986-10-09 The Garrett Corp., Los Angeles, Calif. Eintrittsleitbeschaufelung
US4534526A (en) * 1982-12-27 1985-08-13 United Technologies Corporation Cabin noise suppression in propeller driven aircraft
GB8829792D0 (en) * 1988-12-21 1989-07-05 Marconi Co Ltd Noise reduction method
JPH04272499A (ja) * 1991-02-27 1992-09-29 Matsushita Electric Ind Co Ltd 送風機およびその羽根車の製造方法
US5437419A (en) * 1992-11-06 1995-08-01 The United States Of America As Represented By The United States National Aeronautics And Space Administration Rotorcraft blade-vortex interaction controller
US5634771A (en) * 1995-09-25 1997-06-03 General Electric Company Partially-metallic blade for a gas turbine
US5823467A (en) * 1997-04-01 1998-10-20 Mcdonnell Douglas Corp Passive damping wedge
US5931641A (en) * 1997-04-25 1999-08-03 General Electric Company Steam turbine blade having areas of different densities
US5839882A (en) * 1997-04-25 1998-11-24 General Electric Company Gas turbine blade having areas of different densities
GB2355288B (en) * 1999-10-12 2003-10-01 Rolls Royce Plc Improved turbine blade and manufacture thereof
DK174319B1 (da) * 2000-06-20 2002-12-02 Lm Glasfiber As Vindmøllevinge med støjdæmpningsmidler
US7198062B2 (en) * 2002-11-21 2007-04-03 The Boeing Company Fluid control valve
US7901189B2 (en) 2007-05-14 2011-03-08 General Electric Company Wind-turbine blade and method for reducing noise in wind turbine
US8425191B2 (en) * 2008-05-30 2013-04-23 United Technologies Corporation Propfan assembly
US20100143151A1 (en) * 2009-02-06 2010-06-10 General Electric Company Permeable acoustic flap for wind turbine blades
US20110211952A1 (en) * 2011-02-10 2011-09-01 General Electric Company Rotor blade for wind turbine
US9132909B1 (en) * 2011-03-11 2015-09-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Flap edge noise reduction fins
US9227719B2 (en) * 2011-03-11 2016-01-05 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Reactive orthotropic lattice diffuser for noise reduction
US8695915B1 (en) * 2011-03-11 2014-04-15 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Flap side edge liners for airframe noise reduction
US8840451B2 (en) * 2012-01-24 2014-09-23 Honeywell International Inc. Cabin pressure outflow valve with simplified whistle eliminator
WO2016190753A1 (en) * 2015-05-25 2016-12-01 Dotterel Technologies Limited A shroud for an aircraft
JP6578225B2 (ja) * 2016-02-23 2019-09-18 三菱日立パワーシステムズ株式会社 吸音スプリッタ、サイレンサ、ガスタービン用煙突、および、ガスタービン
GB201707836D0 (en) * 2017-05-16 2017-06-28 Oscar Propulsion Ltd Outlet guide vanes
CN110997486A (zh) 2017-07-24 2020-04-10 多特瑞尔技术有限公司 护罩
CN109665091B (zh) * 2018-12-20 2022-03-25 中国空气动力研究与发展中心低速空气动力研究所 一种基于渐变多孔的后缘噪声抑制方法
US20230331377A1 (en) * 2022-04-13 2023-10-19 Haymatt, L.L.C. Rotor Blade Tracking Wedge with Porous Elements

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1717745A (en) * 1928-02-03 1929-06-18 Tismer Friedrich Propulsion screw
US1946129A (en) * 1933-10-03 1934-02-06 Cebulski Joseph Noiseless propeller blade for aircraft
US2340417A (en) * 1941-10-07 1944-02-01 Clyde E Ellett Noiseless propeller
US2333555A (en) * 1941-10-22 1943-11-02 Prucha Emil John Silent propeller
US2759554A (en) * 1952-08-04 1956-08-21 Bolt Beranek & Newman Acoustic absorber
US2935151A (en) * 1955-09-19 1960-05-03 Bolt Beranek & Newman Acoustic absorber
US3044559A (en) * 1959-07-14 1962-07-17 Chajmik Joseph Propeller
US3402914A (en) * 1965-02-10 1968-09-24 Curtiss Wright Corp Method of controlling the permeability of a porous material, and turbine blade formed thereby
US3266130A (en) * 1965-10-21 1966-08-16 Fort Wayne Metals Inc Method of making a permeable airfoil skin
US3477231A (en) * 1967-12-26 1969-11-11 Gen Electric Noise reduction
US3481427A (en) * 1968-11-29 1969-12-02 Mc Donnell Douglas Corp Acoustical panel structure
US3666043A (en) * 1970-11-12 1972-05-30 Rohr Corp Air divider ring structure for jet engine inlet air duct

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237976A2 (de) * 1986-03-19 1987-09-23 Alcatel SEL Aktiengesellschaft Axiallüfter
EP0237976A3 (de) * 1986-03-19 1989-03-01 Alcatel SEL Aktiengesellschaft Axiallüfter

Also Published As

Publication number Publication date
US3779338A (en) 1973-12-18

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Legal Events

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