WO2022001691A1 - 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法 - Google Patents

用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法 Download PDF

Info

Publication number
WO2022001691A1
WO2022001691A1 PCT/CN2021/100836 CN2021100836W WO2022001691A1 WO 2022001691 A1 WO2022001691 A1 WO 2022001691A1 CN 2021100836 W CN2021100836 W CN 2021100836W WO 2022001691 A1 WO2022001691 A1 WO 2022001691A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
airflow
drag reduction
reduction structure
wind turbine
Prior art date
Application number
PCT/CN2021/100836
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
吴宛洋
钟兢军
Original Assignee
上海海事大学
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 上海海事大学 filed Critical 上海海事大学
Priority to DE112021003476.6T priority Critical patent/DE112021003476T5/de
Publication of WO2022001691A1 publication Critical patent/WO2022001691A1/zh

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
    • F03D1/065—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
    • 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
    • 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
    • F05B2240/306—Surface measures
    • 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
    • F05B2250/182—Geometry two-dimensional patterned crenellated, notched
    • 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
    • F05B2260/97—Reducing windage losses
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to the technical field of wind power generation, in particular to a drag reduction structure of a shark gill-type blade for a wind power generator, a blade and a manufacturing method thereof.
  • Wind is an extremely common natural phenomenon, and the wind energy derived from it is an inexhaustible and inexhaustible renewable resource. With the increasing demand for energy and the urgent requirement of energy transformation, wind power generation has developed rapidly and is currently the most mature way of wind energy utilization in the world. After the war, Danish engineers built small wind turbines based on the principles of aircraft propellers. The use of wind energy for power generation in China began in the 1970s. At that time, micro- and small-scale wind turbines were the main components. In the 1980s, medium and large-scale generators were developed.
  • Wind turbine is the core component of wind power generation system.
  • Wind turbine is mainly divided into vertical axis and horizontal axis.
  • Horizontal axis wind turbine has higher wind energy utilization efficiency and wider application range.
  • a typical horizontal axis wind turbine is mainly composed of a wind wheel, a nacelle, a hub, a governor, a steering device, a transmission mechanism, a mechanical brake device and a tower.
  • the wind wheel of the horizontal axis fan is composed of blades with excellent aerodynamic performance (currently commercial units generally have 2 to 3 blades) mounted on the hub.
  • the blades rotate around a horizontal axis, and the rotation plane is perpendicular to the wind direction.
  • the low-speed rotating wind wheel is accelerated by the speed-increasing gearbox through the transmission system, and the power is transmitted to the generator.
  • the wind turbine blade is an important core component of the wind turbine, and its performance directly affects the power generation efficiency.
  • the resistance suffered by the blade during the rotation process mainly comes from the resistance of mutual friction between the blade and the surrounding airflow, which can even be as high as 70% of the total resistance, which greatly increases the energy consumption of the wind turbine. Therefore, reducing the resistance of the blade and improving the wind power
  • the efficiency of the generator set is directly related.
  • the invention designs a new type of wind turbine blade drag reduction structure based on the bionic structure of the shark gill slit.
  • the appearance of the wind turbine blade is streamlined, and the blade structure of the invention is set to adopt a shark gill slit structure on the windward side of the blade, with one (or more) inlets for air intake, multiple outlets for air outlet, and an air flow channel is formed between the inlet and outlet, and the outlet A jet flow phenomenon is formed at the cross section.
  • the flowing airflow is viscous, and a boundary layer is formed near the wind turbine blades. There is a velocity gradient in the boundary layer.
  • the magnitude of the frictional resistance depends on the velocity gradient in the boundary layer, and it decreases with the weakening of the velocity gradient.
  • the boundary layer The thicker it is, the smaller the velocity gradient changes and the smaller the frictional resistance, and the jet is bent under the action of the main flow and is close to the surface of the wind turbine blade.
  • the jet fluid forms a buffer zone between the main flow and the surface of the wind turbine blade, increasing the thickness of the boundary layer.
  • the continuous equal-spaced airflow outlets extend and strengthen this buffering effect at the same time, thereby weakening the sweeping of the wind turbine blade surface by the mainstream, reducing the blade resistance, optimizing the blade structure, making it adaptable to more working environments and improving the wind turbine. efficient.
  • the purpose of the present invention is to provide a shark gill type blade drag reduction structure, blade and manufacturing method for wind turbines, which can effectively increase the thickness of the boundary layer on the surface of the wind turbine blade, reduce the velocity gradient, and control the contact between the main flow and the wall surface. , reduce the surface friction resistance and improve the power of the wind turbine.
  • a shark gill type blade drag reduction structure of a wind turbine is characterized in that the drag reduction structure is arranged on the surface of the blade and includes a groove opened on the blade, and the groove is provided with an airflow inlet and a a plurality of airflow outlets, and an airflow channel is formed between the airflow inlet and the multiple airflow outlets;
  • the blade rotates, the airflow enters from the airflow inlet, and passes through the airflow outlet along the airflow channel to form a jet, and the gas velocity in the airflow channel is lower than the mainstream, and the jet flowing out from the airflow outlet bends under the impact of the mainstream.
  • a buffer area is formed between the blade surface and the main flow to reduce the friction of the main flow to the blade.
  • the straight line distance between the two points of the front and rear edges of any cross-section of the blade provided with the drag reduction structure is c, and is set as the x-axis, and the distance from the leading edge point along the x-axis, 25%-30% c is Air inlet, 32%-34%c is the first air outlet, 36%-38%c is the second air outlet, 40%-42%c is the third air outlet, 44%-46%c is the fourth air outlet , 48%-50%c is the fifth airflow outlet.
  • intersection line of the airflow inlet and the blade surface is perpendicular to the x-axis.
  • the airflow outlet profile line is parallel to the airflow inlet profile line.
  • the drag reduction structure is arranged in the area of 60%-80% of the blade height.
  • the drag reduction structure is arranged on the surface of the blade body.
  • a method for manufacturing a fan blade characterized in that the method comprises:
  • a groove is set on the surface of the blade body, the groove is provided with an air inlet and a plurality of air outlets, and an air passage is formed between the air inlet and the plurality of air outlets.
  • profile line of the airflow inlet and the profile line of the airflow outlet are on the profile line of the initial surface of the blade body and are parallel to each other to form the outer surface of the blade.
  • the method includes:
  • the inner surface of the fan blade opens a preset distance toward the trailing edge of the blade, and the end position of the inner surface of the fan blade is used as the end position of the airflow channel .
  • the present invention has the following advantages:
  • the drag reduction structure of shark gill blades for wind turbines is proposed for the first time.
  • a bionic structure is proposed, which can effectively reduce the frictional resistance of the blade surface and suppress the generation of flow loss, which can optimize the aerodynamic characteristics of the blades and prolong the wind turbine's life. service life, improve the working performance and reliability of the whole machine. It has important theoretical significance and practical application value, and provides a scientific basis for wind turbine performance improvement and optimization design.
  • FIG. 1 is a structural diagram of a shark gill blade drag reduction structure of a wind turbine of the present invention
  • Fig. 2 is the middle section of the region where the drag reduction structure exists along the height direction of the blade;
  • Figure 3 is a partial view of the airflow inlet and outlet of the drag reduction structure.
  • wind turbine blades are mostly made of glass fiber or high-strength composite materials.
  • the large-scale low-speed wind turbine blades are simplified into the wind turbine blade 1 structure, and the 60%-80% blade height range is selected as the drag reduction blade.
  • 70% of the blade section is the middle section of the drag reduction structure.
  • the position 25% c from the leading edge is the position where the airflow inlet 2 appears, and the length of the airflow inlet 2 is 20% of the blade height and the width is 5% c.
  • five gill slit-like airflow outlets were selected.
  • the five positions of 32%-34%c, 36%-38%c, 40%-42%c, 44%-46%c, 48%-50%c are the first airflow outlet 3 and the second airflow outlet in sequence 4.
  • the width of the third air outlet 5, the fourth air outlet 6, and the fifth air outlet 7 are all 2%c.
  • the five airflow outlets have the same spacing and height.
  • the left and right profiles of the airflow inlet and outlet are on the surface profile of the original wind turbine blade 1 and are parallel to each other to form the outer surface 9 of the wind turbine blade.
  • the length of the airflow channel 8 in the x-direction is 25%c and in the direction perpendicular to the x-axis is 2%c.
  • the position of the inner surface 10 of the wind turbine blade can be determined, and this is the starting position of the airflow channel 8 until the end of the inner surface 10 of the wind turbine blade at 50c%, and the airflow channel 8 structure also ended.
  • the wind turbine rotates, the airflow is viscous, and a boundary layer is formed near the object. There is a velocity gradient in the boundary layer.
  • the magnitude of the frictional resistance depends on the velocity gradient in the boundary layer. The more obvious the velocity gradient is, the greater the frictional resistance will be.
  • the frictional resistance loss is caused. Obviously, when the boundary layer is thicker, the frictional resistance will be smaller.
  • the airflow enters from the airflow inlet 2 to simulate the shark breathing process.
  • the fifth airflow outlet is ejected from the structure of five bionic gill slits. After entering the airflow channel 8, the speed of the airflow will be lower than that of the outside mainstream, and the speed will gradually decrease during the flow of the airflow channel 8. After the jet flows out of the airflow outlet, it meets the mainstream, and the flow path of the low-energy fluid mass is bent. Fold and close to the outer surface 9 of the wind blade.
  • the buffer area between the main flow and the outer surface 9 of the wind turbine blade is formed, the boundary layer is thickened, the velocity gradient is weakened, and the surface frictional resistance loss is reduced.
  • the length of the airflow inlet and airflow outlet of the above drag reduction structure can take any value of the blade height (greater than zero)
  • the airflow inlet and airflow outlet width can take any value allowed by the width of the wind turbine blade (greater than zero)
  • the airflow inlet and The distribution position of the airflow outlet includes the entire range of the 360° circumference of the blade.
  • the number of airflow inlets and airflow outlets is not limited. Any value allowed by the blade width (greater than zero) can be taken.
  • the shape of the airflow inlet and airflow outlet includes rectangle, square, Different shapes such as circle, ellipse, etc., the distances between the airflow outlets include equal intervals but are not limited to equal intervals.
  • the drag reduction structure of the shark gill blade of the wind turbine according to the embodiment of the present invention is described above with reference to FIGS. 1-3 . Further, the present invention can also be applied to fan blades.
  • a fan blade comprising: the above-mentioned fan blade drag reduction structure; and,
  • the drag reduction structure of the fan blade is arranged on the surface of the blade body.
  • the fan blade provided by the embodiment of the present invention has the same technical features as the vortex generator provided by the above-mentioned embodiment, so it can also solve the same technical problem and achieve the same technical effect.
  • fan blades can be used in a horizontal-axis wind turbine or a vertical-axis wind turbine, and the number and rotation speed of the wind turbine blades are not limited.
  • the fan blade of the embodiment of the present invention is described above. Further, the present invention also discloses a method for manufacturing a fan blade, comprising the following steps:
  • a groove is set on the surface of the blade body, the groove is provided with an air inlet and a plurality of air outlets, and an air passage is formed between the air inlet and the plurality of air outlets;
  • the profile line of the airflow inlet and the profile line of the airflow outlet are on the profile line of the initial surface of the blade body and are parallel to each other to form the outer surface of the blade.
  • the inner surface of the fan blade opens a preset distance toward the trailing edge of the blade, and the end position of the inner surface of the fan blade is used as the end position of the airflow channel .

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)
PCT/CN2021/100836 2020-06-28 2021-06-18 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法 WO2022001691A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112021003476.6T DE112021003476T5 (de) 2020-06-28 2021-06-18 Widerstandsreduzierungsstruktur, Schaufel und Herstellungsverfahren für eine Haikiemenschaufel einer Windkraftanlage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010599188.1 2020-06-28
CN202010599188.1A CN111577531B (zh) 2020-06-28 2020-06-28 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法

Publications (1)

Publication Number Publication Date
WO2022001691A1 true WO2022001691A1 (zh) 2022-01-06

Family

ID=72127555

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/100836 WO2022001691A1 (zh) 2020-06-28 2021-06-18 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法

Country Status (3)

Country Link
CN (1) CN111577531B (de)
DE (1) DE112021003476T5 (de)
WO (1) WO2022001691A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111577531B (zh) * 2020-06-28 2024-04-05 上海海事大学 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法
CN112253314A (zh) * 2020-11-10 2021-01-22 上海海事大学 基于鲨鱼鳃射流的燃气轮机风扇及压气机叶片减阻结构

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955459A (zh) * 2005-10-27 2007-05-02 通用电气公司 用于风能涡轮转子的叶片
US20130056173A1 (en) * 2010-01-08 2013-03-07 Aloys Wobben Wind power plant
CN103410656A (zh) * 2013-08-13 2013-11-27 河海大学常州校区 一种叶根部位转捩延迟控制的风力机叶片
CN103410657A (zh) * 2013-08-30 2013-11-27 内蒙古工业大学 一种加肋开槽型风力机叶片
CN103984831A (zh) * 2014-05-27 2014-08-13 山东理工大学 大型风力发电机叶片高逼真、非均一型仿鲨鱼沟槽微结构的设计方法
CN109083807A (zh) * 2018-07-09 2018-12-25 上海理工大学 带同轴射流叶片的h型垂直轴风力机
CN109944737A (zh) * 2019-03-21 2019-06-28 沈阳航空航天大学 一种通道鳃膜式垂直轴风力机叶片及制作方法
CN111577531A (zh) * 2020-06-28 2020-08-25 上海海事大学 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法
CN212318215U (zh) * 2020-06-28 2021-01-08 上海海事大学 用于风力发电机的鲨鱼鳃式叶片减阻结构和叶片

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007148826A1 (en) * 2006-06-21 2007-12-27 Honda Motor Co., Ltd. Wind power generator
EP2031244A1 (de) * 2007-08-31 2009-03-04 Lm Glasfiber A/S Mittel zur Bewahrung des Flusses eines an die Außenseite einer Durchflussreglerelements befestigten strömenden Mediums mittels Verwendung von Kreuzungsunterkanälen
US9062655B2 (en) * 2009-02-24 2015-06-23 Tom Scott Wind turbine generators
CN102884311B (zh) * 2010-02-16 2015-11-25 技术研究及发展基金有限公司 对垂直轴风力涡轮机（vawt）的流控制
KR20120102838A (ko) * 2011-03-09 2012-09-19 인하대학교 산학협력단 흐름발전용 터빈 블레이드
CN102352825A (zh) * 2011-11-01 2012-02-15 三一电气有限责任公司 一种风力发电机组及其叶片
CN102758728B (zh) * 2012-07-13 2014-05-14 华锐风电科技(集团)股份有限公司 控制绕流的叶片及方法和具有该叶片的风力机
GB2537101B (en) * 2015-03-24 2017-04-19 Vestas Wind Sys As Repair of wind turbine components
DE102016123412A1 (de) * 2016-12-05 2018-06-07 Wobben Properties Gmbh Rotorblatt für eine Windenergieanlage und Windenergieanlage
CN110566400B (zh) * 2019-09-10 2021-05-14 河南理工大学 一种水平轴风力机叶片

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1955459A (zh) * 2005-10-27 2007-05-02 通用电气公司 用于风能涡轮转子的叶片
US20130056173A1 (en) * 2010-01-08 2013-03-07 Aloys Wobben Wind power plant
CN103410656A (zh) * 2013-08-13 2013-11-27 河海大学常州校区 一种叶根部位转捩延迟控制的风力机叶片
CN103410657A (zh) * 2013-08-30 2013-11-27 内蒙古工业大学 一种加肋开槽型风力机叶片
CN103984831A (zh) * 2014-05-27 2014-08-13 山东理工大学 大型风力发电机叶片高逼真、非均一型仿鲨鱼沟槽微结构的设计方法
CN109083807A (zh) * 2018-07-09 2018-12-25 上海理工大学 带同轴射流叶片的h型垂直轴风力机
CN109944737A (zh) * 2019-03-21 2019-06-28 沈阳航空航天大学 一种通道鳃膜式垂直轴风力机叶片及制作方法
CN111577531A (zh) * 2020-06-28 2020-08-25 上海海事大学 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法
CN212318215U (zh) * 2020-06-28 2021-01-08 上海海事大学 用于风力发电机的鲨鱼鳃式叶片减阻结构和叶片

Also Published As

Publication number Publication date
DE112021003476T5 (de) 2023-04-20
CN111577531A (zh) 2020-08-25
CN111577531B (zh) 2024-04-05

Similar Documents

Publication Publication Date Title
EP3037656B1 (de) Rotorblatt mit Wirbelerzeugern
WO2022001691A1 (zh) 用于风力发电机的鲨鱼鳃式叶片减阻结构、叶片及制造方法
Wang et al. Blade number effect for a ducted wind turbine
Hütter Optimum wind energy conversion systems
Alquraishi et al. Review on diffuser augmented wind turbine (dawt)
CN106050566B (zh) 一种钝后缘风力机翼型环量控制装置及方法
CN104405596B (zh) 一种风力发电机组低风速翼型族
US20170370345A1 (en) Fluid Turbine Rotor Blade with Winglet Design
CN111550363B (zh) 一种叶尖小翼、风力机叶片及其叶片增效计算方法
CN110110427A (zh) 一种大功率风力机叶片的气动外形设计方法
CN103306892B (zh) 一种动力翼片
CN101509464B (zh) 提高垂直轴风力机性能的被动喷气方法及装置
CN205779470U (zh) 一种钝后缘风力机翼型环量控制装置
CN212318215U (zh) 用于风力发电机的鲨鱼鳃式叶片减阻结构和叶片
CN105840434A (zh) 一种风电叶片涡流发生器优化设计方法
CN105545583B (zh) 风力发电叶片及背风面出流切线倾角的确定方法
CN203515955U (zh) 一种加厚型高气动性能风力机叶片
CN201535228U (zh) 被动喷气式垂直轴风力机
CN110566400B (zh) 一种水平轴风力机叶片
CN102278272B (zh) 一种前突型水平轴风力机叶片
CN204755184U (zh) 一种带导流条的垂直轴风力机叶片
CN203297032U (zh) 一种风力机叶片及风力机
CN106837683B (zh) 迎风面的出流切线倾角的最优值确定方法
CN217950578U (zh) 一种带导流的水平轴风力机整流罩
CN103807112B (zh) 狭管聚风型风力发电装置用叶片

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21832868

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
122 Ep: pct application non-entry in european phase

Ref document number: 21832868

Country of ref document: EP

Kind code of ref document: A1