CN108953074B - Wind-powered electricity generation blade vortex generator - Google Patents
Wind-powered electricity generation blade vortex generator Download PDFInfo
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- CN108953074B CN108953074B CN201810923713.3A CN201810923713A CN108953074B CN 108953074 B CN108953074 B CN 108953074B CN 201810923713 A CN201810923713 A CN 201810923713A CN 108953074 B CN108953074 B CN 108953074B
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- 230000005611 electricity Effects 0.000 title description 2
- 238000009434 installation Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006467 substitution reaction 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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- 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
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- 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
- F05B2240/3062—Vortex generators
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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
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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 wind power blade vortex generator, wherein a vortex generating part comprises a first vortex plate and a second vortex plate which are arranged in a splayed mirror image manner; the vortex generator further includes a flow guide portion disposed at a narrow end of the vortex generating portion. According to the wind power blade vortex generator provided by the invention, the flow guide part is arranged on the vortex generator to play a role in rectification, the flow in the air flow direction can be reduced, the pneumatic performance of the blade is improved, and meanwhile, the flow guide part is matched with the vortex generation part to further improve the pneumatic performance of the blade.
Description
Technical Field
The invention relates to the field of wind power generation equipment, in particular to a wind power blade vortex generator.
Background
With the flourishing growth of economy, the problem of global resource shortage is more and more prominent, people can save non-renewable energy and simultaneously increase the development and utilization of renewable energy, wherein the utilization of wind energy is widely researched and applied.
As an important device for harnessing wind energy, the amount of wind energy captured from the air by the blades of a wind turbine will be directly related to the energy output of the wind turbine. At present, a main method for improving the aerodynamic performance of a blade of a wind driven generator is to add a vortex generator on the surface of the blade, wherein the size and the installation position of the vortex generator have great influence on the airflow flow on the surface of the blade, and the vortex generator is also directly related to the effect of improving the aerodynamic performance of the blade. The existing vortex generator has the problems of low vortex intensity and poor stability in the operation process, and further has a limited effect on improving the pneumatic performance.
Disclosure of Invention
In view of this, the present invention provides a wind turbine blade vortex generator, which improves the aerodynamic performance of a wind turbine blade.
The vortex generator comprises a vortex generation part, wherein the vortex generation part comprises a first vortex plate and a second vortex plate which are arranged in a splayed mirror image manner; the vortex generator further includes a flow guide portion disposed at a narrow end of the vortex generating portion.
Preferably, the flow guide part comprises a first flow guide plate and a second flow guide plate, the first flow guide plate is abutted against the first vortex plate, the second flow guide plate is abutted against the second vortex plate, the first flow guide plate is parallel to the symmetry axis of the vortex generation part or has an included angle less than or equal to 5 degrees, and the second flow guide plate is parallel to the symmetry axis of the vortex generation part or has an included angle less than or equal to 5 degrees.
Preferably, the first included angle formed by the first vortex plate and the symmetry axis is equal to the second included angle formed by the second vortex plate and the symmetry axis, and is between 10 and 50 degrees, and optionally between 10 and 30 degrees.
Preferably, the ratio of the height of the vortex generating part to the chord length of the cross section of the blade at the installation is between 0.4% and 4%.
Preferably, the ratio of the height of the flow guiding portion to the height of the vortex generating portion is between 0.1 and 0.3 or between 0.5 and 0.8.
Preferably, the edge of the vortex generating part is provided with a front side arc, a connecting arc and a rear side arc, and the upper edge of the flow guide part is arc-shaped and forms a continuous arc with the front side arc.
Preferably, the flow guide portion and the vortex flow generating portion are integrally formed.
Preferably, the vortex generator further comprises a substrate, the flow guiding part and the vortex generating part are fixed on the substrate, and the substrate is mounted on the wind power blade.
The invention also provides a wind power blade which comprises a suction surface, a pressure surface, a front edge and a tail edge, wherein any one of the wind power blade vortex generators is arranged on the suction surface.
Preferably, the ratio of the length of the vortex generator in the chord direction from the front edge of the blade section to the chord length of the blade section is between 25% and 50%.
From the above, the wind power blade vortex generator provided by the invention has the advantages that the flow guide part is arranged on the vortex generator to play a role in rectification, the flow in the air flow direction can be reduced, the aerodynamic performance of the blade is improved, and meanwhile, the flow guide part is matched with the vortex generation part to further improve the aerodynamic performance of the blade.
According to the wind power blade vortex generator provided by the invention, the heights of the flow guide part and the vortex generation part are designed according to the section chord length of the blade at the installation position, the size of the vortex generator is accurately matched with each installation position on the blade, and each position effectively improves the pneumatic performance, so that the power generation efficiency of the blade is improved.
According to the wind power blade provided by the invention, the ratio of the length of the vortex generator on the suction surface in the chord direction from the front edge of the section of the blade to the chord length of the section of the blade is within a set range, so that the aerodynamic performance of the blade can be effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a wind turbine blade according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wind turbine blade vortex generator according to an embodiment of the present invention;
fig. 3 is a schematic top view of a vortex generator according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a wind turbine blade according to an embodiment of the present invention;
fig. 5 is a rear view schematically illustrating a vortex generator according to an embodiment of the present invention;
fig. 6 is a schematic side view of a vortex generator according to an embodiment of the present invention.
The vortex generator comprises a suction surface 1, a pressure surface 2, a blade root 3, a blade tip 4, a leading edge 5, a trailing edge 6, a vortex generator 7, a flow guide part 8, a vortex generation part 9, a base plate 10, a blade section chord length 11, a thickness 12, a flow guide part height 13, a vortex generation part height 14, a front side circular arc 15, a connecting circular arc 16, a rear side circular arc 17, an axis of symmetry 18, a first included angle 19, a second included angle 20 and a length 21.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
As shown in fig. 1, for the wind power blade structure provided in the embodiment of the present invention, the wind power blade includes a suction surface 1, a pressure surface 2, a leading edge 5 and a trailing edge 6, and a vortex generator 7 is disposed on the suction surface 1 of the wind power blade. Alternatively, a plurality of vortex generators 7 are arranged in series in the direction from the blade root 3 to the blade tip 4.
Fig. 2 and 3 show the structure of a wind blade vortex generator 7 according to an embodiment of the present invention. The vortex generator 7 comprises a vortex generating part 9, and the vortex generating part 9 comprises a first vortex plate and a second vortex plate which are arranged in a splayed mirror image; the vortex generator 7 further comprises a flow guiding portion 8 arranged at the narrow end of the vortex generating portion 9, and the flow guiding portion is used for reducing the gas spreading flow and playing a role in guiding and rectifying the flow. The guide part 8 and the vortex generation part 9 are matched to play roles in guiding flow and increasing vortex, and the pneumatic performance of the blade is improved.
Further, the flow guiding part 8 comprises a first flow guiding plate and a second flow guiding plate, the first flow guiding plate is abutted to the first vortex plate, the second flow guiding plate is abutted to the second vortex plate, the first flow guiding plate is parallel to or has an included angle of less than or equal to 5 degrees with the symmetry axis 18 of the vortex generating part 9, and the second flow guiding plate is parallel to or has an included angle of less than or equal to 5 degrees with the symmetry axis 18 of the vortex generating part 9. At the moment, the first guide plate and the second guide plate are approximately parallel, and when wind passes through, the impact of the airflow entering the flow guide part on the first guide plate and the second guide plate is small; correspondingly, the flow guide part and the vortex generation part form an obtuse included angle, and the resistance of the airflow which does not enter the flow guide part is small when the airflow meets the first vortex plate and the second vortex plate. Therefore, the vortex generator can rectify and improve the vortex and simultaneously achieve the purpose of reducing the damage to the vortex generator caused by external factors under extreme working conditions.
In some embodiments of the present invention, the flow guiding portion 8 and the vortex portion 9 are integrally formed, specifically, the first flow guiding plate and the first vortex plate are integrally formed, and the second flow guiding plate and the second vortex plate are integrally formed.
As can be clearly seen from fig. 3, the included angle of the vortex generator provided by the embodiment of the present invention is specifically that the first vortex plate and the second vortex plate of the vortex generating portion 9 are distributed in a shape of "eight" on both sides of the symmetry axis 18, and a first included angle 19 formed by the first vortex plate and the symmetry axis 18 is equal to a second included angle 20 formed by the second vortex plate and the symmetry axis 18, and is between 10 and 50 degrees, and optionally, between 10 and 30 degrees. The setting of this angle is advantageous for the generation of eddy currents.
As shown in fig. 4, a schematic cross-sectional view of a wind turbine blade according to an embodiment of the present invention is provided. The blade section chord length 11 is the distance between the leading edge 5 and the trailing edge 6. In some embodiments of the invention, the wind blade is a blunt trailing edge airfoil.
In some embodiments of the invention, as shown in fig. 4 and 5, the ratio of the vortex generation section height 14 to the blade section chord 11 at installation is between 0.4% and 4%. The chord length of the wind power blade is continuously changed from the blade root to the blade tip, the height 14 of the vortex generation part 9 is accurately set according to the chord length of the installation part, and the vortex strength is improved. In addition, in the subsequent maintenance process, the vortex generators 7 are checked and replaced in a targeted mode, and the maintenance efficiency is improved.
In some embodiments of the present invention, the ratio of the height 13 of the flow guiding portion to the height 14 of the vortex generating portion is between 0.1 and 0.3 or between 0.5 and 0.8, which is beneficial for the flow guiding portion 8 to bear smaller wind resistance to achieve flow guiding and rectifying effects and simultaneously cooperate with the vortex generating portion 9 to achieve better vortex intensity, bear smaller wind resistance to prevent the airflow from flowing in a spreading direction, and reduce the loss of lift force caused thereby.
In some embodiments of the invention, as shown in fig. 6, the vortex generator 7 is seen in a side view, where the edge of the vortex generating portion 9 is provided with a front arc 15, a connecting arc 16 and a rear arc 17. Optionally, the upper edge of the flow guiding portion 8 is arc-shaped, and forms a continuous arc with the front side arc 15. Specifically, the front side arc 15 of the first vortex plate extends to the upper edge of the first guide plate, and the front side arc 15 of the second vortex plate extends to the upper edge of the second guide plate. Such a circular arc design further ensures the strength of the vortex generator 7 while contributing to the improvement of aerodynamic performance.
In some embodiments of the present invention, the thickness 12 of the flow guiding portion 8 and the vortex generating portion 9 are equal, which can effectively improve the working reliability of the vortex generator 7 and reduce the damage caused by external factors under extreme working conditions.
In some embodiments of the invention, the vortex generator 7 further comprises a base plate 10, and the flow guiding portion 8 and the vortex generating portion 9 are fixed on the base plate 10. When installed, the base 10 serves as an installation unit without adjusting the positions of the flow guide portion 8 and the vortex generating portion 9, and installation is easy. Optionally, in some embodiments of the present invention, the flow guiding portion 8, the vortex generating portion 9 and the substrate 10 are integrally formed.
In some embodiments of the invention, the vortex generator is made of polymer, which ensures the lightning protection performance of the blade.
The invention also provides a wind power blade which comprises a suction surface 1, a pressure surface 2, a front edge 5 and a tail edge 6, wherein any one of the vortex generators 7 is arranged on the suction surface 1. In particular, the flow guiding portion 8 of the vortex generator 7 is directed towards the leading edge 5 and, correspondingly, the vortex generating portion 9 is directed towards the trailing edge 6.
In some embodiments of the present invention, the ratio of the length 21 of the vortex generator 7 from the leading edge 5 of the blade section in the chord direction to the chord length 11 of the blade section is 25% to 50% (as shown in fig. 4), which is beneficial to improving the lift-drag ratio of the blade, and thus improving the aerodynamic performance of the wind turbine blade.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The wind power blade vortex generator is characterized in that the vortex generator (7) comprises a vortex generating part (9), and the vortex generating part (9) comprises a first vortex plate and a second vortex plate which are arranged in a splayed mirror image; the vortex generator (7) further comprises a flow guide part (8) arranged at the narrow-mouth end of the vortex generation part (9), the flow guide part (8) comprises a first flow guide plate and a second flow guide plate, the first flow guide plate is abutted against the first vortex plate, the second flow guide plate is abutted against the second vortex plate, and the first flow guide plate and the second flow guide plate are both parallel to a symmetry axis (18) of the vortex generation part (9);
the ratio of the height (13) of the flow guiding part to the height (14) of the vortex generating part is between 0.5 and 0.8.
2. Wind blade vortex generator according to claim 1, characterized in that the first angle (19) that the first vortex plate makes with the symmetry axis (18) is equal to the second angle (20) that the second vortex plate makes with the symmetry axis (18) and is between 10 and 50 degrees, optionally between 10 and 30 degrees.
3. Wind blade vortex generator according to claim 1, characterized in that the ratio of the vortex generating section height (14) to the blade section chord (11) at installation is between 0.4% and 4%.
4. Wind blade vortex generator according to claim 1, characterized in that the edge of the vortex generating section (9) is provided with a front side arc (15), a connecting arc (16) and a rear side arc (17), the upper edge of the flow guiding section (8) is arc-shaped, which forms a continuous arc with the front side arc (15).
5. Wind blade vortex generator according to claim 1, characterized in that the flow guiding part (8) and the vortex generating part (9) are integrally formed.
6. Wind blade vortex generator according to claim 1, characterized in that the vortex generator (7) further comprises a base plate (10), the flow guiding part (8) and the vortex generating part (9) being fixed on the base plate (10), the base plate (10) being mounted on the wind blade.
7. Wind turbine blade comprising a suction side (1), a pressure side (2) and a leading edge (5) and a trailing edge (6), characterized in that a wind turbine blade vortex generator according to any of claims 1-6 is arranged on the suction side (1).
8. Wind blade according to claim 7, wherein the ratio of the length (21) of the vortex generator (7) in the chord direction from the blade section leading edge (5) to the blade section chord length (11) is between 25% and 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923713.3A CN108953074B (en) | 2018-08-14 | 2018-08-14 | Wind-powered electricity generation blade vortex generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923713.3A CN108953074B (en) | 2018-08-14 | 2018-08-14 | Wind-powered electricity generation blade vortex generator |
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| Publication Number | Publication Date |
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| CN108953074A CN108953074A (en) | 2018-12-07 |
| CN108953074B true CN108953074B (en) | 2020-08-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107463B (en) * | 2019-05-27 | 2020-06-02 | 上海电气风电集团股份有限公司 | Vortex generator with gradually-reduced section and installation method thereof |
| WO2021089019A1 (en) * | 2019-11-07 | 2021-05-14 | 中材科技风电叶片股份有限公司 | Apparatus and method for regulating airfoil aerodynamic performance of blade, vortex generator control system, unit control system of wind turbine, vortex generator, and blade |
| CN111439372B (en) * | 2020-04-21 | 2021-10-08 | 中国商用飞机有限责任公司 | Vortex generator for aircraft |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2627790T3 (en) * | 2005-05-17 | 2017-07-31 | Vestas Wind Systems A/S | Pitch controlled wind turbine blade that has turbulence generation means, wind turbine and use of it |
| US9039381B2 (en) * | 2010-12-17 | 2015-05-26 | Vestas Wind Systems A/S | Wind turbine blade and method for manufacturing a wind turbine blade with vortex generators |
| US9494132B2 (en) * | 2013-05-07 | 2016-11-15 | General Electric Company | Airflow modifying assembly for a rotor blade of a wind turbine |
| US20150010407A1 (en) * | 2013-07-08 | 2015-01-08 | Alonso O. Zamora Rodriguez | Reduced noise vortex generator for wind turbine blade |
| EP3037656B1 (en) * | 2014-12-22 | 2016-12-14 | Siemens Aktiengesellschaft | Rotor blade with vortex generators |
| CN207145127U (en) * | 2017-08-10 | 2018-03-27 | 上海电气风电集团有限公司 | Vortex generator and its pneumatic equipment bladess |
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Effective date of registration: 20240119 Address after: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee after: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. Patentee after: National University of Defense Technology Address before: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee before: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. |
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