CN110107463B - Vortex generator with gradually-reduced section and installation method thereof - Google Patents
Vortex generator with gradually-reduced section and installation method thereof Download PDFInfo
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- CN110107463B CN110107463B CN201910445723.5A CN201910445723A CN110107463B CN 110107463 B CN110107463 B CN 110107463B CN 201910445723 A CN201910445723 A CN 201910445723A CN 110107463 B CN110107463 B CN 110107463B
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- 238000009434 installation Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title claims abstract description 6
- 230000007704 transition Effects 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003892 spreading Methods 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
- 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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- 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
- 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
Abstract
The invention provides a vortex generator with a gradually-reduced section, which is provided with a hollow structure with two open ends; the first end of the vortex generator and the second end of the vortex generator are both open ends, the end surfaces of the two ends are flush, the first end of the vortex generator is a flow inlet end, and the second end of the vortex generator is a flow outlet end; the cross-sectional area of the vortex generator perpendicular to the centerline tapers from the vortex generator first end to the vortex generator second end; the inner and outer profiles of the vortex generator smoothly transition from the first end of the vortex generator to the second end of the vortex generator; the central line of the vortex generator is parallel to the flow direction, and the outer molded surface of the vortex generator is fixedly adhered to the molded surface of the wind power blade. The invention also provides an installation method of the vortex generator. The vortex generator can improve the lift force of the wind power blade and increase the generated energy, and is particularly suitable for wind fields in low wind speed areas and ground air density areas.
Description
Technical Field
The invention relates to the field of wind power generation equipment, in particular to a vortex generator with a gradually-reduced section.
Background
A plurality of vortex generators are usually installed on a modern wind driven generator blade and used for generating high-energy wing tip vortexes, inhibiting flow separation on the upper surface of a wing profile, delaying stall and improving the generating capacity. A conventional vortex generator structure, as shown in fig. 1, includes two symmetrically disposed fins and a base, the fins being generally perpendicular to the base and angled with respect to the direction of flow. Regarding the shape of the fins, there are also a number of patents that disclose different designs. The geometrical shape of the vortex generator generates wingtip 'vortexes' similar to the wing tip of an airplane in a flow field, the wingtip 'vortexes' bring high-speed fluid energy outside a boundary layer into the boundary layer through rotation, the capability of the boundary layer for overcoming a counter pressure gradient is improved, the separation point of a flowing boundary layer is delayed, the vortex generator increases the maximum lift coefficient in the operation working condition of the blade, the lift-drag ratio is improved, and the wind energy capture efficiency is further improved.
An included angle exists between the existing vortex generator and the flow direction, and due to the included angle, the projection of the fin perpendicular to the flow direction is increased, and the shape resistance is increased. Because the fins of the vortex generator are arranged in the shape of the Chinese character 'ba', the resistance coefficient of the wing profile is increased, and the overall power increasing effect of the vortex generator is further influenced. However, if the included angle is not formed, the airflow sweeps over the fins of the vortex generator in parallel, the structure of the vortex of the downstream airflow induced by the fins is very weak, the disturbance on the wake is very limited, and the effect of inhibiting flow separation is not good.
Disclosure of Invention
The invention aims to reduce the flow resistance introduced by a vortex generator, and simultaneously generate enough wing tip vortex to inhibit the flow separation of the surface of an SS (leeward) surface or a PS (windward) surface of a blade, improve the lift-drag ratio of a wing profile, improve the aerodynamic performance of the blade, reduce the flow noise of the blade and increase the annual energy production of a wind driven generator.
In order to achieve the above object, the present invention provides a vortex generator with a tapered cross section, the vortex generator having a hollow structure with both ends open; the first end of the vortex generator and the second end of the vortex generator are both open ends, the first end of the vortex generator is a flow inlet end, and the second end of the vortex generator is a flow outlet end; the cross-sectional area of the vortex generator perpendicular to its centerline tapers from the vortex generator first end to the vortex generator second end; the inner and outer profiles of the vortex generator smoothly transition from the first end of the vortex generator to the second end of the vortex generator; the central line of the vortex generator is parallel to the flowing direction of the airflow, and the outer molded surface of the vortex generator is fixedly adhered to the outer molded surface of the wind power blade. The central line is a connecting line of the center of the end face of the first end of the vortex generator and the center of the end face of the second end of the vortex generator.
The cross sections of the first end surface of the vortex generator, the second end surface of the vortex generator and any position between the two ends of the vortex generator, which are perpendicular to the central line of the vortex generator, are in the same or different arbitrary shapes or the combination thereof.
The second end of the vortex generator points to the flow separation area of the surface of the downstream wind power blade.
The vortex generators are distributed in a straight line shape and are adhered to the molded surface from the blade root to the blade tip.
The thickness of each vortex generator gradually decreases from the blade root to the blade tip.
The distance between two ends of each vortex generator is gradually reduced from the blade root to the blade tip.
The projection of the vortex generator on the chord length of the blade section takes the front edge of the wind power blade as a starting point and falls between 10 percent and 60 percent of the chord length of the blade section.
Convergent cross section vortex generator still contains pastes the board, connects the setting between vortex generator and wind-powered electricity generation blade through pasting the mode, and a plurality of vortex generators are through pasting the fixed profile of pasting at wind-powered electricity generation blade lee face root section of board.
The vortex generator is integrally formed by plastic injection molding.
A method for mounting a vortex generator according to the present invention, comprising the steps of:
s1, adjusting the wind power blade to enable the wind power blade to be in a posture convenient for construction;
s2, measuring and marking the installation position of the pasting plate on the outer profile of the wind power blade;
s3, adhering a plurality of vortex generators on the upper surface of the adhesive plate; adhering the lower surface of the adhering plate to the mounting position; ensuring that the central line of the vortex generator is parallel to the flow direction of the airflow, and the second end of the vortex generator points to the flow separation area on the surface of the downstream wind power blade; the thickness of the vortex generator and the distance between two ends of the vortex generator are gradually reduced from the blade root to the blade tip;
s4, sealing the joint of the vortex generator and the pasting plate to ensure smooth transition of the joint;
and S5, solidifying and placing the wind power blade provided with the vortex generator.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the structure of the section which is gradually reduced along the flow direction, so that the air flow generates relatively high speed under the action of the section which is gradually reduced after flowing through the vortex generator. The high-speed airflow disturbs the flow of the downstream blade surface, so that the flow separation of the blade surface is inhibited, and the stall is delayed. Because the projection of the tapered section with a certain area is vertical to the flow direction, when the airflow passes through the vortex generator, the upward acting force vertical to the blade profile, namely the upward acting force along the normal direction of the blade profile, is generated, and the acting force can improve the lift force of the blade and increase the power generation.
The vortex generator is used for delaying stall and inhibiting three-dimensional flow of the blade root by being used for the blade root part of the wind power blade, so that the annual energy production can be effectively improved by about 0.5-5 percent, and the effect of improving the energy production is better for wind fields in low wind speed areas and ground air density areas.
The vortex generator can effectively delay the surface flow stall of the airfoil wind power blade, delay the stall attack angle to be about 1-15 degrees and improve the lift-drag ratio by 10-400 percent. The vortex generator of the invention is applied to the blade root part of the thick-wing wind power blade, has better effect of improving the aerodynamic performance,
the vortex generator is used in the range from the blade tip to the blade root, so that the aerodynamic noise of the fan blade can be reduced, and the noise is reduced by 0.5-5 dB.
The invention has simple structure, convenient installation, good application effect and good popularization value.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are an embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts according to the drawings:
FIG. 1 is a schematic diagram of a prior art vortex generator;
fig. 2 and 3 are schematic views of two ends of a vortex generator in a first application embodiment of the invention;
fig. 4 and 5 are schematic diagrams of two ends of a vortex generator in a second application embodiment of the present invention;
FIGS. 6 and 7 are schematic views of the vortex generator with triangular ends according to a third embodiment of the present invention;
fig. 8 and 9 are schematic diagrams illustrating a first end of a vortex generator being square and a second end of the vortex generator being circular in a fourth application example of the present invention;
fig. 10 and 11 are schematic views showing a plurality of vortex generators of the present invention mounted on an adhesive sheet according to a fifth embodiment of the present invention;
fig. 12, 13 and 14 are schematic views illustrating a plurality of vortex generators of the invention mounted on the outer profile of a wind turbine blade according to a fifth application embodiment of the invention;
FIG. 15 is a schematic view of a wind turbine blade configuration;
FIG. 16 is a schematic view of a curved layout of a vortex generator of the present invention from root to tip on a wind turbine blade;
FIG. 17 is a schematic view of a layout of vortex generators on a wind turbine blade along a polygonal line from a blade root to a blade tip according to the present invention;
FIG. 18 is a schematic view of a linear staggered layout of the vortex generators of the present invention on a wind turbine blade from the root to the tip;
FIG. 19 is a schematic view of a vortex generator of the present invention projected on the chord length of the blade section;
in the figure: 1. a blade tip; 2. a blade root; 3. a vortex generator; 4. wind power blades; 5. a pasting plate; 6. the chord length of the blade section; 7. a wind turbine blade leading edge; 8. the rear edge of the wind power blade; 9. blade cross-section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The wind power blade 4 is structurally shown in fig. 15. A wind generator is typically fitted with three wind blades 4 as shown in figure 15. As shown in fig. 15, the two ends of the wind power blade 4 are respectively a blade root 1 and a blade tip 2, and the blade root is connected to the wind wheel hub of the wind power blade. The direction perpendicular to the wind power blade is a normal direction, and the direction from the blade root 1 to the blade tip 2 is a spreading direction; the direction from the wind power blade leading edge 7 to the wind power blade trailing edge 8 is the airflow direction. Fig. 13 corresponds to the portion indicated by the dashed box in fig. 15.
As shown in fig. 2 to 9, the invention provides a vortex generator with a tapered cross section, wherein the vortex generator 3 has a hollow structure with openings at two ends and is integrally formed by plastic injection molding; the first end of the vortex generator and the second end of the vortex generator are both open ends, the first end of the vortex generator is a flow inlet end, and the second end of the vortex generator is a flow outlet end; the connecting line of the center of the end face of the first end of the vortex generator and the center of the end face of the second end of the vortex generator is the center line of the vortex generator; the cross-sectional area of the vortex generator 3 perpendicular to the centre line tapers from the vortex generator first end to the vortex generator second end; the area of the end surface of the second end of the vortex generator is smaller than that of the end surface of the first end of the vortex generator. The inner and outer profiles of the vortex generator 3 smoothly transition from the vortex generator first end to the vortex generator second end; the central line of the vortex generator 3 is parallel to the flow direction of the air flow, and the outer molded surface of the vortex generator is fixedly adhered to the outer molded surface of the wind power blade 4.
The cross section perpendicular to the central line at any position between the end surface of the first end of the vortex generator, the end surface of the second end of the vortex generator and the two ends of the vortex generator can be in any shapes or combinations of shapes which are the same or different from each other. In a first embodiment of the invention, shown in figures 2 and 3, the vortex generators are rounded at both ends. As shown in fig. 4 and 5, in the second application embodiment of the present invention, the vortex generators are square at both ends; in a third embodiment of the invention, shown in figures 6 and 7, the vortex generators are triangular at both ends. In a fourth embodiment of the invention, shown in fig. 8 and 9, the first end of the vortex generator is square and the second end of the vortex generator is round. As shown in fig. 10 to 12, in a fifth application embodiment of the present invention, the vortex generator has a combination of a circular shape and a triangular shape at both ends. In a sixth application embodiment of the present invention, the first end of the vortex generator is square, the second end of the vortex generator is round, and the cross section of the middle part of the vortex generator perpendicular to the center line is triangular.
As shown in fig. 14, the second end of the vortex generator is directed to the outer profile of the wind power blade flowing downstream from the vortex generator 3, so as to ensure that the high-speed airflow generated by the vortex generator 3 flows out from the second end of the vortex generator and then is aligned with the flow separation area flowing to the surface of the downstream blade.
A plurality of said vortex generators 3 may be applied in a linear distribution on the profile from the blade root 2 to the blade tip 1. Preferably, the installation position of the vortex generator 3 is near the separation line and transition line of the blade, and the vortex generator 3 is pasted along the separation line or transition line of the blade. Preferably, the vortex generator 3 is pasted along the separation line at the blade root 2 and along the transition line at the blade tip. As shown in fig. 16 to 18, the layout of the vortex generators 3 may be in a straight line, a polygonal line, or a staggered arrangement.
From the blade root 2 to the blade tip 1, the relative thickness of the plurality of vortex generators 3 and the distance between the two ends of the vortex generators (i.e. the length of the vortex generators 3) gradually decrease. In the application embodiment of the present invention, the relative thickness of the vortex generator 3 is preferably 4% to 55%. The thickness of the vortex generator 3 decreases from the blade root 2 to the blade tip 1. The relative thickness of the vortex generator at the blade tip is preferably 4-25%. The vortex generator preferably has a length of 50mm to 2000mm, and the vortex generator mounted on the blade tip 1 preferably has a length of 50mm to 500 mm.
Preferably, the distance between the aerodynamic center of the vortex generator and the blade is 5-1000 mm.
The blade section 9 is shown in figure 19. The projection C of the vortex generator 3 on the blade section chord length 6 (as shown by a line segment AB in the figure) takes the wind power blade leading edge 7 (i.e., point a) as a starting point, and the point B in the figure corresponds to the wind power blade trailing edge 8, and falls between 10% and 60% of the wind power blade section chord length 6, i.e., AC is 0.1AB:0.6 AB.
As shown in fig. 10 and 11, the vortex generator 3 with a tapered cross section further includes an adhesive plate 5, which is connected and disposed between the vortex generator 3 and the wind turbine blade 4 by an adhesive manner, and in an application embodiment of the present invention, the adhesive plate 5 is rectangular.
Preferably, the mounting elevation angle (the included angle between the outer contour axis of the vortex generator 3 and the pasting plate 5) of the vortex generator 3 is optimal within the range of-10 degrees to 30 degrees; the mounting elevation angle of the vortex generator 3 at the position of the blade tip 1 is preferably-5 to 5 degrees.
A method for mounting a vortex generator 3 according to the present invention includes the steps of:
s1, adjusting the wind power blade 4 to enable the wind power blade 4 to be in a posture convenient for construction;
s2, measuring and marking the installation position of the pasting plate 5 on the outer profile of the wind power blade;
s3, adhering a plurality of vortex generators 3 on the upper surface of the adhesive sheet; adhering the lower surface of the adhering plate to the mounting position; ensuring that the central line of the vortex generator is parallel to the flow direction of the airflow, and the second end of the vortex generator points to the flow separation area on the surface of the downstream wind power blade; the thickness of the vortex generator 3 and the length of the vortex generator 3 are gradually reduced from the blade root 2 to the blade tip 1;
s4, sealing the joint of the vortex generator 3 and the pasting plate 5 to ensure the smooth transition of the joint;
and S5, solidifying and placing the wind power blade 4 provided with the vortex generator 3.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a structure with a tapered section along the flow direction, so that after flowing through the vortex generator 3, the air flow with relatively high speed is generated under the action of the tapered section. The high-speed airflow disturbs the flow of the downstream blade surface, so that the flow separation of the downstream blade surface is inhibited, and the stall is delayed. Because the projection of the tapered section with a certain area exists in the direction perpendicular to the flow direction, when the airflow flows through the vortex generator 3, an upward acting force perpendicular to the blade profile surface, namely an upward acting force along the normal direction of the blade profile surface, is generated, the acting force can improve the lift force of the blade, the power generation capacity is increased, and the wind field is particularly suitable for low wind speed areas and ground air density areas. The invention can also reduce the aerodynamic noise of the fan blade. The invention has simple structure, convenient installation, good application effect and good popularization value.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A vortex generator with a gradually-reduced section is provided with a hollow structure with openings at two ends, wherein a first end of the vortex generator and a second end of the vortex generator are both open ends, the first end of the vortex generator is a flow inlet end, and the second end of the vortex generator is a flow outlet end; the inner and outer profiles of the vortex generator smoothly transition from the first end of the vortex generator to the second end of the vortex generator; the central line of the vortex generator is parallel to the flowing direction of the airflow, and the outer molded surface of the vortex generator is fixedly adhered to the outer molded surface of the wind power blade.
2. The tapered section vortex generator of claim 1, wherein the vortex generator first end face, the vortex generator second end face, the section perpendicular to the vortex generator centerline at any location between the vortex generator ends are of any shape or combination of shapes that are the same or different from each other.
3. The tapered section vortex generator of claim 2 wherein the vortex generator second end is directed toward the flow separation region of its downstream wind blade surface.
4. The tapered section vortex generator of claim 3 wherein a plurality of said vortex generators are affixed in a linear pattern on the blade root to blade tip profile.
5. The tapered section vortex generator of claim 4 wherein each of said vortex generators has a thickness that gradually decreases from a blade root to a blade tip.
6. The tapered section vortex generator of claim 4 wherein the spacing between the ends of each vortex generator decreases from the root to the tip.
7. The tapered section vortex generator of claim 4, wherein the projection of the vortex generator on the chord length of the section of the blade, starting from the leading edge of the wind turbine blade, falls between 10% and 60% of the chord length of the section of the wind turbine blade.
8. The vortex generator with a tapered section as claimed in claim 4, further comprising an adhesive plate, wherein the adhesive plate is connected and disposed between the vortex generator and the wind turbine blade, and the plurality of vortex generators are fixedly adhered to the profile of the blade root section on the lee side of the wind turbine blade through the adhesive plate.
9. The tapered section vortex generator of claim 1 wherein said vortex generator is integrally molded using plastic injection molding.
10. A method of mounting a vortex generator for use in mounting a vortex generator according to any one of claims 1 to 9, comprising the steps of:
s1, adjusting the wind power blade to enable the wind power blade to be in a posture convenient for construction;
s2, measuring and marking the installation position of the pasting plate on the outer profile of the wind power blade;
s3, adhering a plurality of vortex generators on the upper surface of the adhesive plate; adhering the lower surface of the adhering plate to the mounting position; ensuring that the central line of the vortex generator is parallel to the flow direction of the airflow, and the second end of the vortex generator points to the flow separation area on the surface of the downstream wind power blade; the thickness of the vortex generator and the distance between two ends of the vortex generator are gradually reduced from the blade root to the blade tip;
s4, sealing the joint of the vortex generator and the pasting plate to ensure smooth transition of the joint;
and S5, solidifying and placing the wind power blade provided with the vortex generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910445723.5A CN110107463B (en) | 2019-05-27 | 2019-05-27 | Vortex generator with gradually-reduced section and installation method thereof |
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| CN201910445723.5A CN110107463B (en) | 2019-05-27 | 2019-05-27 | Vortex generator with gradually-reduced section and installation method thereof |
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| CN110107463B true CN110107463B (en) | 2020-06-02 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111502907B (en) * | 2019-01-30 | 2022-03-01 | 上海电气风电集团股份有限公司 | Vortex generator, fan blade and wind driven generator comprising same |
| JP7063973B1 (en) | 2020-11-27 | 2022-05-09 | 三菱重工業株式会社 | Manufacturing method of vortex generator for wind turbine blades, wind turbine blades and wind power generators, and wind turbine blades |
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|---|---|---|---|---|
| CN101344068A (en) * | 2007-07-12 | 2009-01-14 | 通用电气公司 | Wind turbine blade tip vortex breakers |
| CN101842582A (en) * | 2007-08-31 | 2010-09-22 | Lm玻璃纤维制品有限公司 | Wind turbine blade with submerged boundary layer control means |
| CN201771673U (en) * | 2009-12-30 | 2011-03-23 | 力仓风力设备(上海)有限公司 | Vortex generator on surface of wind-power blade |
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| CN110107463A (en) | 2019-08-09 |
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Address after: 200241 Dongchuan Road, Shanghai, No. 555, building No. 8, floor, floor, No. Applicant after: Shanghai Electric Wind Power Group Co., Ltd Address before: 200241, 4 floor, building 555, 4 Dongchuan Road, Shanghai, Minhang District Applicant before: SHANGHAI ELECTRIC WIND POWER GROUP Co.,Ltd. |
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