CN110566400B - Horizontal shaft wind turbine blade - Google Patents
Horizontal shaft wind turbine blade Download PDFInfo
- Publication number
- CN110566400B CN110566400B CN201910852768.4A CN201910852768A CN110566400B CN 110566400 B CN110566400 B CN 110566400B CN 201910852768 A CN201910852768 A CN 201910852768A CN 110566400 B CN110566400 B CN 110566400B
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- blade
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- wind turbine
- pipeline
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- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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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
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- 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
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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 invention discloses a horizontal shaft wind turbine blade, which comprises a wing-shaped blade main body, an airflow outlet and a high-pressure airflow pipeline, wherein the wing-shaped blade main body is provided with a blade body; wherein the airflow outlet is arranged at the pressure side of the blade tip of the blade; the high-pressure airflow pipeline is arranged inside the blade, one end of the high-pressure airflow pipeline is communicated with the airflow outlet, and the other end of the high-pressure airflow pipeline penetrates through the blade main body, the blade neck and the blade root. The invention is provided with the airflow outlet on the basis of the original blade, thereby avoiding the strength reduction of the blade caused by airflow disturbance and reducing the production cost and the weight of the blade.
Description
Technical Field
The invention relates to the technical field of horizontal shaft wind turbine blades, in particular to a horizontal shaft wind turbine blade.
Background
The key point of the wind generating set is to obtain larger wind generating power and have efficient blades. The aerodynamic appearance design and the structural form of the blade directly influence the performance and the power of the wind power generation device and are the most core parts in the wind power generator. An effective method for improving the wind energy utilization efficiency of a horizontal axis wind turbine is to additionally arrange winglets at the blade tip part of the wind turbine, such as a horizontal axis wind turbine with a winglet (application patent No. CN200410017010.2) and a horizontal axis wind turbine with an S-shaped winglet (application patent No. CN200810033269.4), wherein although the winglets can effectively improve the wind energy utilization coefficient and reduce the aerodynamic noise, the bending moment at the blade root position is increased, particularly under the condition of sudden wind, the blade is easy to overload, the service life of the blade is shortened, and even the blade is broken.
Therefore, it is obvious that the existing wind turbine blades have inconvenience and defects in structure and use, and further improvement is needed.
Disclosure of Invention
Therefore, the invention provides the wind turbine blade, which can reduce the production cost of the blade and the weight of the blade under the requirement of ensuring the strength of the wind turbine blade.
A horizontal axis wind turbine blade comprising:
the blade comprises a blade body, a blade neck, a blade root, at least one airflow outlet and at least one high-pressure airflow pipeline;
the blade main body is an airfoil shape, and the blade neck is connected between the blade main body and the blade root;
at least one of the airflow outlets is disposed at a tip pressure face of the blade body;
at least one high-pressure airflow pipeline is arranged inside the blade and communicated with at least one airflow outlet;
further, the connection relationship between the high-pressure airflow pipeline and the airflow outlet is as follows:
one of said high-pressure gas flow ducts being connected to one or more of said gas flow outlets, or
One or more of the high pressure gas flow conduits is connected to one of the gas flow outlets.
Further, the airflow outlet is a groove or a small hole.
Further, when the airflow outlet is at least two small holes, the spanwise width of the small holes is 1% -5% of the chord length of the blade; the sum of the chord lengths of all the orifices is greater than 1/3 of the chord length of the vane.
Further, the value range of the angle of the small hole is set between 30 degrees and 60 degrees.
Further, the small holes are round, oval or rectangular.
Further, the small holes are arranged along the chord direction of the blade and are uniformly arranged on the pressure surface of the blade tip of the blade.
The invention has the following beneficial effects: the invention is provided with the airflow outlet on the basis of the original blade, thereby avoiding the strength reduction of the blade caused by airflow disturbance and reducing the production cost and the weight of the blade.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
in the figure: 11-blade body, 12-airflow outlet, 13-high pressure airflow pipeline, 21-blade root, 22-blade tip, 23-blade neck, 24-airflow and 25-blade moving direction.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The invention relates to a horizontal shaft wind turbine blade, which comprises a wing-shaped blade main body 11, an airflow outlet 12 and a high-pressure airflow pipeline 13; wherein the airflow outlet 12 is arranged at the pressure side of the blade tip 22 of the blade; the high-pressure air flow duct 13 is arranged inside the blade 11, one end of the high-pressure air flow duct is communicated with the air flow outlet 12, and the other end of the high-pressure air flow duct passes through the blade body 11, the blade neck 23 and the blade root 21.
As shown in fig. 1 and 2, the high pressure airflow duct 13 is provided with an airflow outlet 12 near the blade tip 22, and the airflow outlet 12 is a small hole or a groove and is used for converting the pressure of the airflow into the speed of the airflow. Wherein one high-pressure gas flow pipeline 13 is connected with one or more gas flow outlets 12, or one or more high-pressure gas flow pipelines 13 are connected with one gas flow outlet 12.
When the airflow outlet 12 is provided with at least two small holes, the spanwise width of the small holes is 1% -5% of the chord length of the blade; the sum of the chord lengths of all the orifices is greater than 1/3 of the chord length of the vane. The angle of the small hole can be set between 30 degrees and 60 degrees. The small holes are round, oval or rectangular; the small holes are specifically as follows: the pressure surface of the blade body 11 is uniformly arranged along the chord direction of the blade body 11.
The principle of the invention and the comparison with other similar inventions have the following beneficial effects:
1. the invention is provided with a plurality of small holes or grooves at the blade tip of the blade, a high-pressure air source is introduced through a pipeline, then high-pressure air flow is sprayed out of the small holes or the grooves, and the sprayed air flow 24 forms an air wall to block the air flow at the lower surface of the blade from winding on the upper surface, thereby playing a role similar to a wing tip end plate, weakening the vortex strength of the wing tip of the blade, increasing the lift-drag ratio of the blade, improving the utilization coefficient of wind energy and simultaneously reducing the aerodynamic noise of the blade tip.
2. Compared with the blade with the winglet, the high-speed airflow is adopted to replace the winglet of the blade, so that the design does not need to consider the connection strength between the winglet and the wingtip, the alternating bending moment of the root of the blade is reduced, and the service life of the blade is prolonged.
3. Compared with the existing blade without the winglet, the invention has the similar effect as the winglet, can block the circumfluence of the lower surface of the blade to the upper surface, weakens the vortex strength of the tip, increases the lift-drag ratio of the blade, reduces the weight of the blade and achieves the aim of improving the aerodynamic performance of the blade.
The foregoing describes a specific embodiment of the present invention. It should be noted that the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make appropriate modifications or improvements within the operable range without affecting the present invention.
Claims (3)
1. A horizontal axis wind turbine blade, comprising:
the blade comprises a blade body, a blade neck, a blade root, at least two airflow outlets and at least one high-pressure airflow pipeline;
the blade main body is an airfoil shape, and the blade neck is connected between the blade main body and the blade root;
at least two of the airflow outlets are disposed at a tip pressure face of the blade body;
at least one high-pressure airflow pipeline is arranged inside the blade and communicated with the airflow outlet;
the connection relationship between the high-pressure airflow pipeline and the airflow outlet is as follows:
one of said high pressure gas flow conduits being connected to one or more of said gas flow outlets;
the airflow outlet is a small hole;
the small holes are arranged along the chord direction of the blade and are uniformly arranged on the pressure surface of the blade tip of the blade;
the spanwise width of the small holes is 1% -5% of the chord length of the blade; the sum of the chord lengths of all the orifices is greater than 1/3 of the chord length of the vane.
2. The blade for a horizontal-axis wind turbine as claimed in claim 1, wherein: the value range of the angle of the small hole is set between 30 degrees and 60 degrees.
3. The blade for a horizontal-axis wind turbine as claimed in claim 1, wherein: the small holes are round, oval or rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852768.4A CN110566400B (en) | 2019-09-10 | 2019-09-10 | Horizontal shaft wind turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852768.4A CN110566400B (en) | 2019-09-10 | 2019-09-10 | Horizontal shaft wind turbine blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110566400A CN110566400A (en) | 2019-12-13 |
| CN110566400B true CN110566400B (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910852768.4A Active CN110566400B (en) | 2019-09-10 | 2019-09-10 | Horizontal shaft wind turbine blade |
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| Country | Link |
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| CN (1) | CN110566400B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577531B (en) * | 2020-06-28 | 2024-04-05 | 上海海事大学 | Shark gill type blade drag reduction structure for wind driven generator, blade and manufacturing method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2334674Y (en) * | 1997-12-11 | 1999-08-25 | 崔建新 | Air jet power increasing wing |
| CN1529052A (en) * | 2003-09-26 | 2004-09-15 | 沈阳航空工业学院 | Blade tip air-injection method capable of increasing wind energy utilizing efficiency for norizontal-shaft wind power gererator |
| CA2674306C (en) * | 2007-01-05 | 2014-05-13 | Stefano Bove | Wind turbine blade with lift-regulating means in form of slots or holes |
| WO2010093621A1 (en) * | 2009-02-10 | 2010-08-19 | West Virginia University | Method for circulation controlled vertical axis wind turbines |
| KR20110136296A (en) * | 2010-06-14 | 2011-12-21 | 삼성중공업 주식회사 | Blades for wind turbine and wind turbine therewith |
| US20120020803A1 (en) * | 2011-02-14 | 2012-01-26 | Paul Lees | Turbine blades, systems and methods |
| US9133819B2 (en) * | 2011-07-18 | 2015-09-15 | Kohana Technologies Inc. | Turbine blades and systems with forward blowing slots |
| CN103306892B (en) * | 2012-04-18 | 2016-04-27 | 王政玉 | A kind of power fin |
| CN102705176A (en) * | 2012-05-18 | 2012-10-03 | 上海交通大学 | Wind turbine blade with embedded diversion pipe capable of controlling tip vortex |
| EP3034871A1 (en) * | 2014-12-17 | 2016-06-22 | Siemens Aktiengesellschaft | Rotor blade with an opening at the tip section |
| US10371121B1 (en) * | 2017-02-21 | 2019-08-06 | Khaled Abdullah Alhussan | Wind turbine blade with a passive porous medium for flow separation control |
| CN108087193B (en) * | 2017-12-28 | 2019-12-13 | 江苏金风科技有限公司 | Blade, blade synergistic system and wind generating set |
| CN108468619B (en) * | 2018-03-26 | 2019-09-03 | 南京航空航天大学 | A kind of centrifugal wind machine blade jet stream power enhancer |
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- 2019-09-10 CN CN201910852768.4A patent/CN110566400B/en active Active
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| CN110566400A (en) | 2019-12-13 |
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