CN101454565B - 具有渐扩后缘的风轮机叶片 - Google Patents

具有渐扩后缘的风轮机叶片 Download PDF

Info

Publication number
CN101454565B
CN101454565B CN2007800192512A CN200780019251A CN101454565B CN 101454565 B CN101454565 B CN 101454565B CN 2007800192512 A CN2007800192512 A CN 2007800192512A CN 200780019251 A CN200780019251 A CN 200780019251A CN 101454565 B CN101454565 B CN 101454565B
Authority
CN
China
Prior art keywords
trailing edge
wind turbine
turbine blade
zone
ter
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.)
Expired - Fee Related
Application number
CN2007800192512A
Other languages
English (en)
Other versions
CN101454565A (zh
Inventor
马克·奥拉夫·斯洛特
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.)
Gamesa Eolica SA
Original Assignee
Gamesa Eolica SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38778154&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN101454565(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gamesa Eolica SA filed Critical Gamesa Eolica SA
Publication of CN101454565A publication Critical patent/CN101454565A/zh
Application granted granted Critical
Publication of CN101454565B publication Critical patent/CN101454565B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • 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
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0244—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0256—Stall control
    • 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
    • F05B2240/301—Cross-section characteristics
    • 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
    • F05B2250/30—Arrangement of components
    • F05B2250/32—Arrangement of components according to their shape
    • F05B2250/324—Arrangement of components according to their shape divergent
    • 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
    • F05B2250/70—Shape
    • F05B2250/71—Shape curved
    • F05B2250/712—Shape curved concave
    • 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

Abstract

具有空气动力学外形(5)的风轮机叶片，空气动力学外形具有前缘(11)、后缘(13)以及在前缘(11)与后缘(13)之间的吸力和压力侧(17、19)，所述外形(5)包括在风轮机叶片的至少一部分横截面在后缘(13)方向增大的后缘区域TER。所述后缘区域TER优选在较低的部分具有凹曲表面的渐扩形状。

Description

具有渐扩后缘的风轮机叶片
技术领域
本发明涉及经空气动力学优化的风轮机叶片，具体涉及具有渐扩后缘的风轮机叶片。
背景技术
在风轮机叶片中不使用具有高升/阻比形状的空气动力学外形，如分层外形，因为这样的外形对前缘的粗糙度敏感。
风轮机叶片的外形通常是前缘锋利，后缘适度地变钝，由于在一些情况下出现偏离，从后缘散发尾流。尾流涡流的间隔和涡度的强度、分布和方向，以及尾流开始的位置是阻力提高和升力降低的因素，但极不希望出现这二者。
尽管后缘装置对阻力有负面影响，但其用于提高升力仍众所周知。
这些装置其中之一是垂直于翼弦安装的Gueney襟翼，如图1所示。Gurney襟翼产生形成分离泡的两个涡流，导致升力增大。Gurney襟翼还推迟气流的分离，允许在较高的仰角下有良好的性能。但是Gurney襟翼也会导致额外的阻力。
EP 1314885公开了由锯齿形板材构成的后缘装置，其连接到叶片的后缘。
DE10021850公开了后缘延长体，其根据弹性形变呈现不同的几何形状。
这些装置中没有一个能令人满意地提高风轮机的效率，因此仍然需要具有空气动力学优化外形的风轮机叶片。
发明内容
本发明的目的是提供一种风轮机叶片，其外形能提高前缘的粗糙敏感度，并因此降低负荷与空气动力学效率中的不确定度，提高叶片的功能可靠性。
本发明的另一目的是提供一种风轮机叶片，其外形能提高升力，从而允许风轮机叶片具有更好的空气动力学性能和/或减小风轮机叶片的翼弦长度以更易于运输。
本发明的另一目的是提供一种具有刚性几何外形的风轮机叶片，其不需要附加装置就可以提高升/阻比。
通过提供具有空气动力学外形的风轮机叶片实现本发明的这些和其他目标，空气动力学外形具有前缘、后缘以及在前缘与后缘之间的压力和吸力侧，所述外形包括在叶片的至少一部分横截面在后缘方向上增大的后缘区域。
在本发明的一方面，所述后缘区域主要由于其具有凹曲形的压力侧而具有渐扩形状(与收缩形状的标准外形相比)。
在本发明的另一方面，具有渐扩后缘区域的风轮机叶片的部分是外形较厚的部分，即具有高厚度/翼弦长度比的外形。
通过以下参考附图进行的详细说明可理解本发明的其他特征和优点。
附图说明
图1是具有Gurney襟翼的已知风轮机叶片的示意图。
图2是标准风轮机叶片外形的示意图。
图3是根据本发明的风轮机叶片外形的示意图。
图4是根据本发明的风轮机叶片外形的性能的示意图。
具体实施方式
图2表示已知的风轮机叶片的标准外形3，其具有前缘11、适度粗钝的后缘13以及具有吸力侧17与压力侧19的提升表面15。翼弦21是在前缘11与后缘13之间画出的假想线。
相对于标准外形3，图3表示根据本发明的风轮机叶片的外形5，其特别对靠近后缘13的压力侧和吸力侧的区域31、33(标准外形中的类似区域31’和33’包括在虚线中)作出以下修改：
-压力侧区域31具有凹几何形状
-吸力侧区域33的形状构成较厚的后缘13。
由于所述修改，外形5具有在后缘13的方向横截面增大的后缘区域TER。换句话说，靠近后缘的所述区域31、33相对于已知标准外形3的收缩形状具有渐扩的形状。
一方面(参见图4)，导致形成渐扩构造的后缘区域TER的较厚后缘13在后缘区域TER之后引起低压的分离流区域，分离流区域首先提高阻力，但是低压区域形成朝向后缘的边界层吸力，边界层吸力使边界层稳定。这样导致了失速延迟，失速延迟增大最大升力，并减小运行在最大升力时的阻力。如果由于附着昆虫或任何类型的尘垢使前缘粗糙，效果更显著。缺点在于略微提高了低仰角时的阻力，这对于通常运行在较大仰角的风轮机叶片的内部部分影响不大。
另一方面，后缘区域TER的渐扩构造提高外形5的最大升力系数。在压力侧19的凹形区域31以与Gurney襟翼类似的方式向下偏转气流，促进循环，因此升力曲线向更大的负迎角移动，且升力更大，因为通过使用光滑的曲线形状避免在Gurney襟翼前面的分离泡，所以效率比Gurney襟翼更高。缺点是在低升力系数时阻力变大，但是阻力的增大小于Gurney襟翼的方式。而且，这样的效果对于通常运行在较大仰角的风轮机叶片的内部部分影响不大。
在另一优选实施例中，区域31、33的假想切线之间的角B在0～45度的范围内。在标准外形中，角B通常是负数，范围在-20～0度。
在另一优选实施例中，后缘的厚度Te在翼弦长度C的2％～20％的范围内。
在另一优选实施例中，后缘区域TER从对应于翼弦长度C的72％的翼弦位置的横截面23延伸到100％的翼弦位置，测量从前缘11开始。
在另一优选实施例中，具有渐扩后缘区域的风轮机叶片的最大厚度T与翼弦长度C的比在30％～100％的范围内。用降低前缘粗糙敏感度的渐扩后缘区域TER特别优化厚的外形，因为通常厚的外形的前缘粗糙度性能差。
虽然已经参考优选实施例充分说明了本发明，但是显然在本发明的范围内可以引入修改，修改不受实施例限定，而受权利要求的内容限定。

Claims (4)

1.具有空气动力学外形(5)的风轮机叶片，空气动力学外形具有前缘(11)、后缘(13)以及在前缘(11)与后缘(13)之间的吸力和压力侧(17、19)，其特征在于：所述外形(5)包括在风轮机叶片的至少一部分中、横截面在后缘(13)方向增大的后缘区域TER，及所述压力侧(19)在后缘区域TER的区域(31)具有凹曲表面，其中所述区域(31)的假想切线与后缘区域TER的吸力侧(17)的区域(33)的假想切线之间的角B在0～45度的范围内。
2.根据权利要求1所述的风轮机叶片，其特征在于后缘区域TER从对应于翼弦长度C的72％的翼弦位置的横截面位置延伸到100％的翼弦位置，从前缘(11)到后缘(13)进行测量。
3.根据权利要求1所述的风轮机叶片，其特征在于后缘(13)的厚度Te在翼弦长度C的2％～20％的范围内。
4.根据权利要求1所述的风轮机叶片，其特征在于具有在后缘(13)方向横截面增大的后缘区域TER的叶片的最大厚度T与翼弦长度C的比在30％～100％的范围内。
CN2007800192512A 2006-05-31 2007-05-29 具有渐扩后缘的风轮机叶片 Expired - Fee Related CN101454565B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ESP200601444 2006-05-31
ES200601444A ES2294927B1 (es) 2006-05-31 2006-05-31 Pala de aerogenerador con borde de salida divergente.
PCT/ES2007/000312 WO2007138136A1 (es) 2006-05-31 2007-05-29 Pala de aerogenerador con borde de salida divergente

Publications (2)

Publication Number Publication Date
CN101454565A CN101454565A (zh) 2009-06-10
CN101454565B true CN101454565B (zh) 2012-02-08

Family

ID=38778154

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007800192512A Expired - Fee Related CN101454565B (zh) 2006-05-31 2007-05-29 具有渐扩后缘的风轮机叶片

Country Status (6)

Country Link
US (1) US8182232B2 (zh)
EP (1) EP2022979B1 (zh)
CN (1) CN101454565B (zh)
ES (2) ES2294927B1 (zh)
PL (1) PL2022979T3 (zh)
WO (1) WO2007138136A1 (zh)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7883324B2 (en) 2007-01-09 2011-02-08 General Electric Company Wind turbine airfoil family
AU2009292717B2 (en) 2008-09-19 2014-10-23 Wobben Properties Gmbh Wind turbine with low induction tips
EP2138714A1 (en) * 2008-12-12 2009-12-30 Lm Glasfiber A/S Wind turbine blade having a flow guiding device with optimised height
EP2141358A1 (en) * 2008-12-12 2010-01-06 Lm Glasfiber A/S Wind turbine blade having a spoiler with effective separation of airflow
US8320215B2 (en) 2009-01-16 2012-11-27 Westerngeco L.L.C. Steering system and method for use in seismic survey applications
EP2366891B1 (de) * 2010-03-18 2014-07-23 Nordex Energy GmbH Windenergieanlagenrotorblatt
DK2405129T3 (en) * 2010-07-06 2017-03-13 Lm Wp Patent Holding As Wind turbine blade with variable rear edge
TR201008900A2 (tr) * 2010-10-27 2011-06-21 K���K Osman Temas yüzeyleri arttırılmış yüksek verimli bir pervane.
DK2479423T3 (en) 2011-01-24 2018-05-28 Siemens Ag Wind turbine rotor blade element
EP2514669B1 (en) 2011-04-18 2014-09-10 Claverham Limited Active gurney flap
EP2514668B1 (en) * 2011-04-18 2016-11-02 Claverham Limited Active gurney flap
EP2514667B1 (en) 2011-04-18 2015-06-10 Claverham Limited Active gurney flap
EP2568166B1 (de) 2011-09-09 2015-07-15 Nordex Energy GmbH Windenergieanlagenrotorblatt mit einer dicken Profilhinterkante
US8834127B2 (en) * 2011-09-09 2014-09-16 General Electric Company Extension for rotor blade in wind turbine
JP5297558B1 (ja) 2011-10-12 2013-09-25 三菱重工業株式会社 風車翼及びこれを備えた風力発電装置ならびに風車翼の設計方法
CN103147930A (zh) * 2011-12-06 2013-06-12 上海电气风能有限公司 一种风机叶片大后缘结构
CN104364517B (zh) 2012-03-13 2017-10-24 柯尔顿控股有限公司 扭转的叶片根部
US9175666B2 (en) * 2012-04-03 2015-11-03 Siemens Aktiengesellschaft Slat with tip vortex modification appendage for wind turbine
US9151270B2 (en) * 2012-04-03 2015-10-06 Siemens Aktiengesellschaft Flatback slat for wind turbine
US11136958B2 (en) * 2012-08-06 2021-10-05 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Swallow tail airfoil
NL2009286C2 (en) * 2012-08-06 2014-02-10 Stichting Energie Swallow tail airfoil.
EP2713044B2 (en) * 2012-09-28 2022-12-07 Siemens Gamesa Renewable Energy A/S Wind turbine rotor blade
US20140093380A1 (en) * 2012-10-03 2014-04-03 General Electric Company Noise reduction tab and method for wind turbine rotor blade
ES2633479T3 (es) 2013-08-02 2017-09-21 Vestas Wind Systems A/S Una pala para una turbina eólica y un método para la fabricación de una pala para una turbina eólica
CN103711655B (zh) * 2013-12-26 2016-04-06 中国科学院工程热物理研究所 一种大厚度钝尾缘风力机叶片
JP5825339B2 (ja) * 2013-12-27 2015-12-02 ダイキン工業株式会社 クロスフローファンの翼
JP6282203B2 (ja) 2014-09-12 2018-02-21 株式会社日立製作所 風力発電装置及び軸流タイプブレード
US10151325B2 (en) * 2015-04-08 2018-12-11 General Electric Company Gas turbine diffuser strut including a trailing edge flap and methods of assembling the same
WO2017039666A1 (en) 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Wind turbine blade with trailing edge tab
DE102016117012A1 (de) * 2016-09-09 2018-03-15 Wobben Properties Gmbh Windenergieanlagen-Rotorblatt
DE102018103678A1 (de) * 2018-02-19 2019-08-22 Wobben Properties Gmbh Rotorblatt einer Windenergieanlage mit einer Splitterplatte
PL425656A1 (pl) 2018-05-21 2019-12-02 Abt Accord Spolka Z Ograniczona Odpowiedzialnoscia Łopatka turbiny
DE102019113080A1 (de) * 2019-05-17 2020-11-19 Wobben Properties Gmbh Rotorblatt und Windenergieanlage
CN114341486A (zh) 2019-08-14 2022-04-12 功率曲线有限公司 具有格尼襟翼的风力涡轮机叶片

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076516A (en) * 1984-10-29 1991-12-31 Wheat Robert B High drag airfoil apparatus
EP1112928A2 (de) * 1999-12-31 2001-07-04 DLR Deutsches Zentrum für Luft- und Raumfahrt e.V. Flügelprofil mit leistungs-steigernder Hinterkante

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1893064A (en) * 1931-04-03 1933-01-03 Zap Dev Company Aircraft
DE3113079C2 (de) 1981-04-01 1985-11-21 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Aerodynamischer Groß-Flügel und Verfahren zu dessen Herstellung
US4858852A (en) 1987-06-01 1989-08-22 Mcdonnell Douglas Corporation Divergent trailing-edge airfoil
US4961686A (en) * 1989-02-17 1990-10-09 General Electric Company F.O.D.-resistant blade
EP0615903B1 (en) 1993-03-13 1999-09-15 GKN Westland Helicopters Limited Rotary blades
DK9500009U3 (da) 1995-01-10 1996-04-10 Stiesdal Bonus Energy A Henrik Organ til forbedring af en vindmølles virkningsgrad
DE10021850A1 (de) * 2000-05-05 2001-11-08 Olaf Frommann Adaptive Profilierung für Windenergierotoren
CA2359535A1 (en) * 2001-10-22 2003-04-22 Paul Stearns Wind turbine blade
US7059833B2 (en) 2001-11-26 2006-06-13 Bonus Energy A/S Method for improvement of the efficiency of a wind turbine rotor
DE10307682A1 (de) 2002-06-05 2004-01-08 Aloys Wobben Rotorblatt einer Windenergieanlage
US6749401B2 (en) * 2002-07-22 2004-06-15 Arthur Vanmoor Hydrodynamically and aerodynamically optimized leading edge structure for propellers, wings, and airfoils
DE10319246A1 (de) * 2003-04-28 2004-12-16 Aloys Wobben Rotorblatt einer Windenergieanlage
EP1845258A1 (en) 2006-04-10 2007-10-17 Siemens Aktiengesellschaft Wind turbine rotor blade

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5076516A (en) * 1984-10-29 1991-12-31 Wheat Robert B High drag airfoil apparatus
EP1112928A2 (de) * 1999-12-31 2001-07-04 DLR Deutsches Zentrum für Luft- und Raumfahrt e.V. Flügelprofil mit leistungs-steigernder Hinterkante

Also Published As

Publication number Publication date
CN101454565A (zh) 2009-06-10
US8182232B2 (en) 2012-05-22
ES2294927B1 (es) 2009-02-16
EP2022979A1 (en) 2009-02-11
ES2564102T3 (es) 2016-03-17
US20090263252A1 (en) 2009-10-22
EP2022979B1 (en) 2015-11-11
PL2022979T3 (pl) 2016-04-29
ES2294927A1 (es) 2008-04-01
EP2022979A4 (en) 2013-04-03
WO2007138136A1 (es) 2007-12-06

Similar Documents

Publication Publication Date Title
CN101454565B (zh) 具有渐扩后缘的风轮机叶片
US10787246B2 (en) Wing tip with winglet and ventral fin
US9550563B2 (en) Wing tip shape for a wing, in particular of aircraft
JP5712202B2 (ja) 航空機の翼の非平面翼端装置、及び非平面翼端装置を備えた翼
CN102414440B (zh) 功率输出增大的风轮机
EP1338793A3 (en) Serrated wind turbine blade trailing edge
CN101813070B (zh) 小功率风力发电机的叶片翼型
CN101596934B (zh) 一种翼梢涡扩散装置
CN101230836A (zh) 风力涡轮机翼型族
JP2010530333A (ja) 小翼
US8651427B1 (en) Wing tip device with recess in surface
KR20160017083A (ko) 풍력 발전 설비의 로터 블레이드 그리고 풍력 발전 설비
EP0244334B1 (en) Airfoil-shaped body
US7111570B1 (en) Dynamic surface element for bodies moving through a fluid
CN111742137A (zh) 风能设施的具有导流板的转子叶片
US11761418B2 (en) Wind turbine blade with a gurney flap
EP2228534B1 (en) Aerodynamic profile for the root of a wind turbine blade having a double leading edge
RU65861U1 (ru) Законцовка лопасти винта
RU56329U1 (ru) Законцовка лопасти вертолета
CN217898082U (zh) 一种用于风机叶片的翼梢小翼及风机叶片
CN2900356Y (zh) 钝尾缘翼型
CN208827972U (zh) 一种可降低风阻的装置
EP1568604A1 (en) Helicopter
CN117644966A (zh) 一种新型格尼襟翼、机翼及飞行器
CN112297828A (zh) 一种利用车辆尾气降低空气阻力的控制系统

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120208

Termination date: 20200529

CF01 Termination of patent right due to non-payment of annual fee