FR3111619B1 - Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise - Google Patents

Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise Download PDF

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Publication number
FR3111619B1
FR3111619B1 FR2006317A FR2006317A FR3111619B1 FR 3111619 B1 FR3111619 B1 FR 3111619B1 FR 2006317 A FR2006317 A FR 2006317A FR 2006317 A FR2006317 A FR 2006317A FR 3111619 B1 FR3111619 B1 FR 3111619B1
Authority
FR
France
Prior art keywords
blade
rotorcraft
cavities
attenuating noise
extrados
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.)
Active
Application number
FR2006317A
Other languages
French (fr)
Other versions
FR3111619A1 (en
Inventor
Damien Desvigne
David Alfano
Frédéric Guntzer
Jean-François Hirsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Helicopters SAS
Original Assignee
Airbus Helicopters SAS
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 Airbus Helicopters SAS filed Critical Airbus Helicopters SAS
Priority to FR2006317A priority Critical patent/FR3111619B1/en
Publication of FR3111619A1 publication Critical patent/FR3111619A1/en
Application granted granted Critical
Publication of FR3111619B1 publication Critical patent/FR3111619B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B64C21/08—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2220/00—Active noise reduction systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/14—Boundary layer controls achieving noise reductions
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/467—Aerodynamic features
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Toys (AREA)

Abstract

La présente invention concerne une pale (3) de giravion (1) munie de cavités (4), ladite pale (3) comportant un intrados et un extrados s’étendant chacun entre un bord d’attaque et un bord de fuite, chacune desdites cavités (4) communiquant avec un milieu extérieur au niveau dudit intrados et/ou dudit extrados, Selon l’invention, ladite pale (3) comporte un système (11) actif d’obturation et inversement d’ouverture d’au moins une desdites cavités (4), ledit système (11) comportant au moins un actionneur (12) configuré pour obturer en tout ou partie ladite au moins une cavité (4) de ladite pale (3) et inversement pour ouvrir en tout ou partie ladite au moins une cavité (4) de ladite pale (3). Figure d’abrégé : figure 1The present invention relates to a blade (3) of a rotorcraft (1) provided with cavities (4), said blade (3) comprising an intrados and an extrados each extending between a leading edge and a trailing edge, each of said cavities (4) communicating with an external environment at the level of said intrados and/or said extrados, According to the invention, said blade (3) comprises an active system (11) for closing and conversely opening at least one of said cavities (4), said system (11) comprising at least one actuator (12) configured to close all or part of said at least one cavity (4) of said blade (3) and vice versa to open all or part of said at least a cavity (4) of said blade (3). Abstract Figure: Figure 1

FR2006317A 2020-06-17 2020-06-17 Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise Active FR3111619B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR2006317A FR3111619B1 (en) 2020-06-17 2020-06-17 Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2006317A FR3111619B1 (en) 2020-06-17 2020-06-17 Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise
FR2006317 2020-06-17

Publications (2)

Publication Number Publication Date
FR3111619A1 FR3111619A1 (en) 2021-12-24
FR3111619B1 true FR3111619B1 (en) 2022-12-23

Family

ID=72801603

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2006317A Active FR3111619B1 (en) 2020-06-17 2020-06-17 Rotorcraft blade provided with cavities, rotorcraft equipped with such a blade and method for attenuating noise

Country Status (1)

Country Link
FR (1) FR3111619B1 (en)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3853428A (en) 1972-01-27 1974-12-10 Bolt Beranek & Newman Foil structures with reduced sound generation
JP2951540B2 (en) * 1994-06-30 1999-09-20 川田工業株式会社 Noise reduction device for rotorcraft
US6142425A (en) * 1995-08-22 2000-11-07 Georgia Institute Of Technology Apparatus and method for aerodynamic blowing control using smart materials
US6368059B1 (en) * 2000-07-28 2002-04-09 Lockheed Martin Corporation Controlled passive porosity systems to mitigate cavitation
FR2866931A3 (en) 2004-03-01 2005-09-02 Claude Guth HELICE MONICA
FR2895554B1 (en) 2005-12-23 2008-03-21 Onera (Off Nat Aerospatiale) METALLIC POROUS BODY FOR ATTENUATING THE NOISE OF AERONAUTICAL TURBINES
US7959412B2 (en) 2006-09-29 2011-06-14 General Electric Company Wind turbine rotor blade with acoustic lining
US7901189B2 (en) 2007-05-14 2011-03-08 General Electric Company Wind-turbine blade and method for reducing noise in wind turbine
US8251317B2 (en) * 2008-04-18 2012-08-28 The Boeing Company System and method for varying the porosity of an aerodynamic surface
DE102010041111A1 (en) * 2010-09-21 2012-03-22 Deutsches Zentrum für Luft- und Raumfahrt e.V. Rotor blade with integrated passive surface flap
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
US9120567B2 (en) * 2012-06-11 2015-09-01 Sikorsky Aircraft Corporation High speed compound rotary wing aircraft
DE102013109489B4 (en) * 2013-08-30 2017-05-11 Deutsches Zentrum für Luft- und Raumfahrt e.V. Aerodynamic component having a structural element for forming a surface with variable air permeability
WO2017123294A1 (en) * 2015-10-17 2017-07-20 Sikorsky Aircraft Corporation Reduced blade vortex interaction
US9745050B2 (en) * 2015-12-18 2017-08-29 Amazon Technologies, Inc. Selecting propellers for performance and noise shaping

Also Published As

Publication number Publication date
FR3111619A1 (en) 2021-12-24

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