CN1308594C - Horizontal shaft wind mill with small sharp wing - Google Patents

Horizontal shaft wind mill with small sharp wing Download PDF

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Publication number
CN1308594C
CN1308594C CNB2004100170102A CN200410017010A CN1308594C CN 1308594 C CN1308594 C CN 1308594C CN B2004100170102 A CNB2004100170102 A CN B2004100170102A CN 200410017010 A CN200410017010 A CN 200410017010A CN 1308594 C CN1308594 C CN 1308594C
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CN
China
Prior art keywords
winglet
blade
wind
winglets
blade tips
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Expired - Fee Related
Application number
CNB2004100170102A
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Chinese (zh)
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CN1563707A (en
Inventor
杜朝辉
朱春建
欧阳华
竺晓程
胡丹梅
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Priority to CNB2004100170102A priority Critical patent/CN1308594C/en
Publication of CN1563707A publication Critical patent/CN1563707A/en
Application granted granted Critical
Publication of CN1308594C publication Critical patent/CN1308594C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • 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
    • F05B2240/307—Blade tip, e.g. winglets
    • 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

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  • 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)
  • Wind Motors (AREA)

Abstract

The present invention relates to a horizontal shaft wind mill with winglets at blade tips, which can improve the efficiency of the wind mill and increase the utilization radial band width of effective wind energy by that the positions of the blade tips of the wind mill are provided with the winglets. The winglets are in lift type blade type the same as blades of a wind wheel, and are arranged at the tops of the blades to perform the functions of a baffle plate so as to change the circulation distribution of the blade tips of the wind mill and reduce the induced resistance. The front edges of the winglets are positioned on the blade tips in the back of the maximum thickness of the blades, and the back edges of the winglets are positioned in the positioned of the blade tips on the back edges of the blades so that pressure fields on the winglets can just replenish the pressure generated on main blades so as to prevent boundary layers of the blade tips from separating; the winglets in the positions of the blade tips are backward bent along the direction of coming flow in appearance, and are outward inclined in a certain degree, and the pressure surface faces the outer side of the wind wheel so as to damage and weaken tip vortex which is unfavorable to the operation of the wind mill in the positions of the blade tips so as to improve the operation efficiency of the horizontal shaft wind mill. Compared with the existing horizontal shaft wind mill, the present invention has high catching efficiency of the wind energy.

Description

The horizontal-shaft wind turbine that has tip vane
Technical field
The present invention relates to a kind of horizontal-shaft wind turbine that has tip vane, compare with existing horizontal-shaft wind turbine and have higher wind energy capturing efficiency, belong to technical field of wind power generating equipment.
Background technique
Wind energy is a kind of clean renewable energy sources.Under the situation of current mankind, utilize wind energy power to come into one's own day by day to energy and environment problem growing interest.World's wind-power electricity generation total amount increases year by year fast.The wind energy resources of China is abundanter, and according to statistics, it is 2.53 hundred million kilowatts that the reality in China's wind energy content can be developed total amount, is equivalent to 1.3 times of China's generating total installation of generating capacity.For horizontal-shaft wind turbine, its blade tip place mobile is subjected to the influence that tail flows behind blade tip whirlpool and the impeller, has bigger loss.Yet the moment of torsion that horizontal-shaft wind turbine tip segment lift produces is bigger, and its aeroperformance has fundamental influence for the overall performance of wind energy conversion system.There is no at present the correlation technique report that improves at horizontal-shaft wind turbine blade tip efficient specially both at home and abroad.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of horizontal-shaft wind turbine that has tip vane is provided, effectively improve the aeroperformance of wind energy conversion system, energy saving is raised the efficiency.
For realizing such purpose, the present invention improves the efficient of wind energy conversion system, the radial bandwidth that the increase available wind energy utilizes by winglet is installed at wind energy conversion system blade tip place under the prerequisite of original wind turbine blade structure parameter not being changed.The invention is characterized in the improvement of tip segment---the installation of winglet.Winglet among the present invention adopts the lift-type blade profile identical with wind wheel blade, is installed on the top of blade, distributes with the circular rector that changes the wind energy conversion system blade tip, reduces induced drag.For reaching the purpose of replenishing the pressure on the blade tip, little nose of wing is positioned at blade tip maximum blade thickness rear, and trailing edge is positioned at blade tip trailing edge place.Winglet edge in shape comes flow path direction to roll over backward, and outer left-falling stroke is to a certain degree arranged, and its pressure side to disperse trailing vortex, reduces its intensity towards the wind wheel outside.
Horizontal-shaft wind turbine concrete structure of the present invention mainly comprises wind wheel, cabin and pylon, wherein:
Wind wheel: form by 3 lift-type blades, cowling and main drive shafts, be used for capturing wind energy and be translated into mechanical energy output.
The cabin: be positioned at the pylon top, be used for supporting wind wheel and with the joining gear drive of wind wheel, generator, arrangements for speed regulation and adjusted device thereof.Except above-mentioned parts and device, also have supporting electrical control equipment, oil hydraulic pump etc. in the cabin.
Pylon: be used for supporting various device in wind energy conversion system and the cabin, and make it the built on stilts certain altitude, make the wind-force function be in running under the good wind regime environment.
The present invention installs a winglet that improves the wind energy conversion system ride quality at the tip segment of each blade, and winglet adopts blade profile, the identical materials identical with pneumatic equipment blades made, is installed on blade tip.The winglet installation direction with come flow path direction consistent, its root wing chord overlaps with the wing chord of blade tip section aerofoil profile, pressure side is towards the wind wheel outside, suction surface is towards the wind wheel axle center.The winglet height is about 1/10 of wind wheel radius, is folded to the impeller rear, and outer left-falling stroke is to a certain degree arranged, and the winglet root is positioned at the rear of blade tip place wind wheel blade maximum ga(u)ge, and to a certain degree sharpening and sweepback are arranged.
Horizontal-shaft wind turbine in the running, incoming flow is through wind wheel, in blade tip, because pressure difference can produce by pressure side to the blade tip whirlpool that lifting surface flows, but in the present invention, blade tip is equipped with winglet, at first play baffle effect, the blade tip whirlpool of having dissipated, the circular rector that has changed blade tip distributes.Simultaneously, winglet itself also is a lift-type blade, and the trailing vortex that incoming flow is produced on winglet can weaken mutually with the blade tip whirlpool to a certain extent.Winglet is installed on after the maximum blade thickness, and the pressure field that produces on the winglet can be replenished the pressure field that produces on the blade tip, has avoided the too early boundary layer of blade tip to separate, thereby has improved the pneumatic efficiency at blade tip place.
The present invention is simple in structure, and is reasonable in design, under the prerequisite that keeps original wind turbine blade structure parameter, by winglet is installed at wind energy conversion system blade tip place, changed the blade tip flow field that is unfavorable for the wind energy conversion system operation.Horizontal-shaft wind turbine of the present invention improves on efficient than the horizontal-shaft wind turbine of general type, and available wind energy utilizes radial bandwidth to increase to some extent.
Description of drawings
Fig. 1 is a horizontal-shaft wind turbine overall structure schematic representation of the present invention.
Among Fig. 1,1-winglet, 2-blade, 3-cabin, the main drive shaft of 4-band cowling, 5-pylon.
Fig. 2 is the installation position schematic representation of winglet of the present invention.
Among Fig. 2, I is for coming flow path direction, and II is the sense of rotation of pneumatic equipment blades made around main drive shaft 4.
Fig. 3 is the structural representation of winglet of the present invention.
Among Fig. 3, the little nose of wing of 6-, 7-winglet trailing edge, blade profile maximum ga(u)ge place, position, A-blade tip place, little nose of wing of B-and blade crosspoint, C-winglet trailing edge and blade crosspoint.
Fig. 4 is the side direction structural representation of winglet of the present invention.
Among Fig. 4,8-winglet suction surface, 9-blade suction surface, 10-winglet pressure side, 11-blade pressure surface.
Map parameter explanation: β-dihedral; γ-sweepback angle; θ-sharpening angle; H-winglet height; T-winglet thickness; The distance at little nose of wing of l-and blade crosspoint and this vane foil maximum ga(u)ge place, place; l 0-blade tip place blade profile chord-length; l 1-winglet root chord-length.
Embodiment
Below in conjunction with drawings and Examples technological scheme of the present invention is further described.
Overall structure of the present invention mainly is made up of main drive shaft 4, the pylon 5 of blade 2, cabin 3, band cowling as shown in Figure 1.Gear drive, generator, arrangements for speed regulation and electric adjusted device thereof, electrical control equipment, oil hydraulic pump etc. are wherein arranged in the cabin 3.The winglet 1 of the present invention's design is installed in the tip segment of blade 2.
The specially designed winglet of the present invention is connected as shown in Figure 2 with blade installation.Little wing structure such as Fig. 3 are shown in Figure 4.Winglet 1 is installed in the tip segment of blade 2, and its material is consistent with blade material, and its blade profile adopts the lift-type blade consistent with blade 2 main bodys, installation direction with come flow path direction I consistent.Winglet pressure side 10 is towards the wind wheel outside, and winglet suction surface 8 is towards the wind wheel axle center.So, can think on the winglet installation direction that winglet still is the extension of pneumatic equipment blades made, and this edge, extension is rolled over an angle behind the flow path direction.
The position of winglet: on the pneumatic equipment blades made top, the wing chord of blade section aerofoil profile overlaps with the winglet wing chord.After the leading edge 6 of winglet is positioned at blade tip blade profile maximum ga(u)ge with the blade tip crosspoint B of pneumatic equipment blades made 2, with the A of maximum ga(u)ge place be about the blade profile chord-length l of this place apart from l 01/10.Winglet trailing edge 7 and close this place's trailing edge of the blade tip crosspoint C of pneumatic equipment blades made 2.
Winglet 1 is connected with pneumatic equipment blades made 2 blade tips: can be to combine together with blade, also can add connection set, but will be prerequisite with near the flow field of not destroying blade tip place and the winglet.
Winglet is installed dihedral β: be defined as the angle between winglet suction surface and blade tip blade profile cross section, β=15 °～20 °.Winglet root joint and winglet main body should seamlessly transit.
Winglet sweepback angle γ: be defined as the angle between little nose of wing and blade profile vertical surface, γ=30 °.
Winglet sharpening angle θ: since the chord length of winglet along exhibition to reducing gradually, definition winglet sharpening angle is an angle between little nose of wing and trailing edge.θ＝30°～50°。
Winglet height h: be defined as the winglet wingtip to perpendicular distance between wing root, winglet height h is 10% of a pneumatic equipment blades made radius.As shown in Figure 3.
Winglet maximum ga(u)ge t Max: at the root of winglet, winglet maximum ga(u)ge t MaxWith the ratio of the maximum ga(u)ge of pneumatic equipment blades made blade tip and both chord-length ratio (l 1: l 0) proportional relation; Along small span to, winglet thickness t and chord length are linearity according to winglet sharpening angle and dwindle.As shown in Figure 4.

Claims (1)

1, a kind of horizontal-shaft wind turbine that has tip vane, the main drive shaft (4) and the pylon (5) that comprise blade (2), cabin (3), band cowling, the winglet (1) that blade profile is identical with blade is installed at the place, leaf top that it is characterized in that each blade (2), winglet (1) installation direction with come flow path direction consistent, winglet pressure side (10) is towards the wind wheel outside, winglet suction surface (8) is towards the wind wheel axle center, and the wing chord of winglet (1) overlaps with the wing chord of blade (2) top section aerofoil profile; After the little nose of wing (6) of described winglet (1) is positioned at vane foil maximum ga(u)ge (A) with wind energy conversion system blade tip crosspoint (B), be the blade profile chord-length (l of this place with maximum ga(u)ge place distance (l) 0) 1/10, winglet trailing edge (7) and wind energy conversion system blade tip crosspoint (C) are near this place's trailing edge; Described winglet (1) installation dihedral β=15 °～20 °, winglet sweepback angle γ=30 °, winglet sharpening angle θ=30 °～50 °, winglet height (h) is 10% of a pneumatic equipment blades made radius, winglet maximum ga(u)ge (t Max) with the ratio and both proportional relations of chord-length ratio of the maximum ga(u)ge of pneumatic equipment blades made blade tip, along small span to, winglet thickness (t) and chord length are linearity according to winglet sharpening angle and dwindle.
CNB2004100170102A 2004-03-18 2004-03-18 Horizontal shaft wind mill with small sharp wing Expired - Fee Related CN1308594C (en)

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Application Number Priority Date Filing Date Title
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CN1308594C true CN1308594C (en) 2007-04-04

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101622446B (en) * 2006-12-22 2011-12-28 维斯塔斯风力系统有限公司 Wind turbine with rotor blades equipped with winglets and blades for such rotor
US20110229320A1 (en) * 2008-08-29 2011-09-22 Vestas Wind Systems A/S Wind turbine blade with device for modifying the blade aerodynamic surface
US7997875B2 (en) * 2010-11-16 2011-08-16 General Electric Company Winglet for wind turbine rotor blade
CN102094767B (en) * 2011-01-20 2012-08-29 西北工业大学 Airfoil group for megawatt-class wind turbine blade
CN102996367A (en) * 2012-11-29 2013-03-27 南京航空航天大学 Movable winglet device for wind turbine blade
CN103485973B (en) * 2013-07-25 2016-08-10 中国大唐集团科学技术研究院有限公司 A kind of pneumatic equipment blades with tip vane
CN104863791A (en) * 2015-05-20 2015-08-26 上海交通大学 Novel wind turbine blade
CN109882338B (en) * 2019-04-04 2020-08-18 浙江大学 Composite layered tidal current energy blade and preparation method thereof
CN110173391A (en) * 2019-05-24 2019-08-27 上海电力学院 A kind of Large marine Axis Wind Turbine With A Tip Vane fusion winglet and wind energy conversion system
CN111664052A (en) * 2020-06-24 2020-09-15 曹正武 Blade tip winglet propeller (fan)
CN113982840B (en) * 2021-10-29 2023-01-20 西安交通大学 Power-increasing wind turbine suitable for mountain valley wind and power generation method

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003676A (en) * 1973-10-23 1977-01-18 Sweeney Thomas E Windmill blade and processes related thereto
US4093402A (en) * 1974-06-10 1978-06-06 Theodoor Van Holten Propeller or a set of wings for a wind mill
US4362469A (en) * 1979-09-04 1982-12-07 Stichting Energieonderzoek Centrum Nederland Device for deriving energy from a flow of fluid
CN85203805U (en) * 1985-09-17 1986-10-29 黄胜初 Co-axle windmill generator
WO1995009304A1 (en) * 1993-09-30 1995-04-06 Egon Gelhard Engineering Wind turbine with a darrieus h-rotor
CN2270125Y (en) * 1996-01-18 1997-12-10 张富昌 Two-turning direction sail type vertical shaft wind motor
CN2312342Y (en) * 1996-12-13 1999-03-31 康健 Wind motor
DE10021850A1 (en) * 2000-05-05 2001-11-08 Olaf Frommann Adaptive profile for wind energy rotor has curvature along blade longitudinal axis that has aerodynamic profile that can be varied as function of blade radius by elastically deforming rear edge
WO2002064974A1 (en) * 2001-02-13 2002-08-22 Akira Obata Wind power generating device
CN1387610A (en) * 1999-11-01 2002-12-25 水翼动力系统股份公司 Turbine for flowing fluids

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003676A (en) * 1973-10-23 1977-01-18 Sweeney Thomas E Windmill blade and processes related thereto
US4093402A (en) * 1974-06-10 1978-06-06 Theodoor Van Holten Propeller or a set of wings for a wind mill
US4362469A (en) * 1979-09-04 1982-12-07 Stichting Energieonderzoek Centrum Nederland Device for deriving energy from a flow of fluid
CN85203805U (en) * 1985-09-17 1986-10-29 黄胜初 Co-axle windmill generator
WO1995009304A1 (en) * 1993-09-30 1995-04-06 Egon Gelhard Engineering Wind turbine with a darrieus h-rotor
CN2270125Y (en) * 1996-01-18 1997-12-10 张富昌 Two-turning direction sail type vertical shaft wind motor
CN2312342Y (en) * 1996-12-13 1999-03-31 康健 Wind motor
CN1387610A (en) * 1999-11-01 2002-12-25 水翼动力系统股份公司 Turbine for flowing fluids
DE10021850A1 (en) * 2000-05-05 2001-11-08 Olaf Frommann Adaptive profile for wind energy rotor has curvature along blade longitudinal axis that has aerodynamic profile that can be varied as function of blade radius by elastically deforming rear edge
WO2002064974A1 (en) * 2001-02-13 2002-08-22 Akira Obata Wind power generating device

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