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IN2014CN04448A - - Google Patents

Info

Publication number
IN2014CN04448A
IN2014CN04448A IN4448CHN2014A IN2014CN04448A IN 2014CN04448 A IN2014CN04448 A IN 2014CN04448A IN 4448CHN2014 A IN4448CHN2014 A IN 4448CHN2014A IN 2014CN04448 A IN2014CN04448 A IN 2014CN04448A
Authority
IN
India
Prior art keywords
serrations
blade
serration
noise reduction
pressure
Prior art date
Application number
Inventor
Ashish Singh
Original Assignee
Lm Wp Patent Holding As
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 Lm Wp Patent Holding As filed Critical Lm Wp Patent Holding As
Publication of IN2014CN04448A publication Critical patent/IN2014CN04448A/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/32—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor with roughened surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/18—Geometry two-dimensional patterned
    • F05B2250/183—Geometry two-dimensional patterned zigzag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

A wind turbine blade is described having noise reduction features. The blade has a plurality of projecting serrations provided at the blade trailing edge to reduce the scattering noise produced during operation of the blade wherein the serrations have a plurality of through going apertures defined in the serration body. The apertures act to provide a pressure equalisation effect at the serrations between the suction and pressure sides. This pressure equalisation provides for improved noise reduction performance as well as a reduction in mechanical stresses and strains which may be experienced by the serrations increasing serration lifetime.
IN4448CHN2014 2011-11-23 2012-11-15 IN2014CN04448A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11190375 2011-11-23
PCT/EP2012/072769 WO2013076009A1 (en) 2011-11-23 2012-11-15 A wind turbine blade

Publications (1)

Publication Number Publication Date
IN2014CN04448A true IN2014CN04448A (en) 2015-09-04

Family

ID=47178723

Family Applications (1)

Application Number Title Priority Date Filing Date
IN4448CHN2014 IN2014CN04448A (en) 2011-11-23 2012-11-15

Country Status (8)

Country Link
US (1) US9617974B2 (en)
EP (1) EP2783103B1 (en)
CN (1) CN104220745B (en)
DK (1) DK2783103T3 (en)
ES (1) ES2621483T3 (en)
IN (1) IN2014CN04448A (en)
PL (1) PL2783103T3 (en)
WO (1) WO2013076009A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2497739A (en) * 2011-12-19 2013-06-26 Rolls Royce Plc Rotor blade with serrated trailing edge
US20150050154A1 (en) * 2013-05-23 2015-02-19 Kristian R. DIXON Airfoil trailing edge apparatus for noise reduction
WO2014207015A1 (en) * 2013-06-27 2014-12-31 Siemens Aktiengesellschaft Rotor blade with noise reduction means
EP2908001B1 (en) * 2014-02-12 2016-09-21 Siemens Aktiengesellschaft Means for alleviating strain on a wind turbine rotor blade
GB201410675D0 (en) 2014-06-16 2014-07-30 Univ Brunel Noise reduction to the trailing edge of fluid dynamic bodies
EP2998571B1 (en) * 2014-09-19 2017-11-01 Siemens Aktiengesellschaft Lift influencing device for a rotor blade of a wind turbine
EP3098436B1 (en) * 2015-05-29 2020-02-26 Siemens Gamesa Renewable Energy A/S Noise reducing flap with opening
EP3181895A1 (en) * 2015-12-17 2017-06-21 LM WP Patent Holding A/S Splitter plate arrangement for a serrated wind turbine blade
DE102016201114A1 (en) 2016-01-26 2017-07-27 Wobben Properties Gmbh Rotor blade of a wind turbine and wind turbine
ES2715511T5 (en) * 2016-02-12 2024-06-07 Lm Wind Power As Serrated trailing edge panel for a wind turbine blade
US10400744B2 (en) 2016-04-28 2019-09-03 General Electric Company Wind turbine blade with noise reducing micro boundary layer energizers
CN106050553A (en) * 2016-08-01 2016-10-26 中国华电科工集团有限公司 Noise reducing device for large-thickness blunt trailing-edge airfoil
CN106168193B (en) * 2016-08-26 2018-12-21 明阳智慧能源集团股份公司 A kind of denoising structure of blade of wind-driven generator
US10858088B2 (en) * 2016-08-31 2020-12-08 David E. Shormann Biomimetic airfoil bodies and methods of designing and making same
ES2951066T3 (en) * 2017-01-12 2023-10-17 Lm Wind Power As A wind turbine blade comprising a noise reduction device at the trailing edge
DE102017117843A1 (en) * 2017-08-07 2019-02-07 Wobben Properties Gmbh Rotor blade of a rotor of a wind turbine, wind turbine and method for improving the efficiency of a rotor of a wind turbine
CN108194258B (en) * 2017-12-27 2020-01-31 江苏金风科技有限公司 Noise reduction device for blade, wind generating set and noise reduction method
US10767623B2 (en) 2018-04-13 2020-09-08 General Electric Company Serrated noise reducer for a wind turbine rotor blade
US10746157B2 (en) 2018-08-31 2020-08-18 General Electric Company Noise reducer for a wind turbine rotor blade having a cambered serration
CN109292076A (en) * 2018-11-15 2019-02-01 哈尔滨工业大学 A kind of low self noise airfoil structure with multi-wavelength sawtooth trailing edge
CN111379662A (en) * 2018-12-29 2020-07-07 中材科技风电叶片股份有限公司 Wind power blade and fan
CN110529345A (en) * 2019-08-30 2019-12-03 射阳远景能源科技有限公司 A kind of hollow type sawtooth denoising device
NL2025831B1 (en) 2020-06-15 2022-02-16 Univ Delft Tech Wind turbine blade
US11852118B2 (en) * 2020-06-29 2023-12-26 Vestas Wind Systems A/S Wind turbine
EP3945208B1 (en) * 2020-07-27 2024-05-15 Wobben Properties GmbH Wind energy system and rotor blade for a wind energy system
CN112128050B (en) * 2020-10-29 2022-02-11 上海电气风电集团股份有限公司 Noise reduction structure, blade and wind generating set
CN114738319B (en) * 2022-04-20 2023-11-14 浙江尚扬通风设备有限公司 Low-noise axial flow fan and using method thereof
CN115095474A (en) * 2022-05-11 2022-09-23 大唐安徽发电有限公司新能源分公司 Multi-structure combined blade noise reduction sawtooth tail edge and installation method

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB329783A (en) * 1929-04-17 1930-05-29 Louis Henry Crook Improvements in or relating to aerodynamic wing control
US5088665A (en) * 1989-10-31 1992-02-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Serrated trailing edges for improving lift and drag characteristics of lifting surfaces
EP1948504B1 (en) * 2005-11-15 2010-04-14 Airbus Operations GmbH Brake flap for an aircraft
US7740206B2 (en) 2006-04-13 2010-06-22 The Board Of Trustees Of The Leland Stanford Junior University Translating active Gurney flap to alleviate aircraft wake vortex hazard
US7959412B2 (en) * 2006-09-29 2011-06-14 General Electric Company Wind turbine rotor blade with acoustic lining
GB2466478A (en) 2008-12-02 2010-06-30 Aerovortex Mills Ltd Suction generation device
US20100143151A1 (en) 2009-02-06 2010-06-10 General Electric Company Permeable acoustic flap for wind turbine blades
US8083488B2 (en) * 2010-08-23 2011-12-27 General Electric Company Blade extension for rotor blade in wind turbine
US7976276B2 (en) * 2010-11-04 2011-07-12 General Electric Company Noise reducer for rotor blade in wind turbine
US8523515B2 (en) 2010-11-15 2013-09-03 General Electric Company Noise reducer for rotor blade in wind turbine
US8128364B2 (en) * 2010-12-07 2012-03-06 General Electric Company Wind turbine rotor blade with porous window and controllable cover member
GB2497739A (en) * 2011-12-19 2013-06-26 Rolls Royce Plc Rotor blade with serrated trailing edge

Also Published As

Publication number Publication date
EP2783103B1 (en) 2017-01-04
ES2621483T3 (en) 2017-07-04
PL2783103T3 (en) 2017-06-30
US20140286784A1 (en) 2014-09-25
WO2013076009A1 (en) 2013-05-30
CN104220745B (en) 2017-05-10
US9617974B2 (en) 2017-04-11
EP2783103A1 (en) 2014-10-01
CN104220745A (en) 2014-12-17
DK2783103T3 (en) 2017-04-10

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