CN109083806B - Wave wing type blade and wind turbine - Google Patents
Wave wing type blade and wind turbine Download PDFInfo
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- CN109083806B CN109083806B CN201810872370.2A CN201810872370A CN109083806B CN 109083806 B CN109083806 B CN 109083806B CN 201810872370 A CN201810872370 A CN 201810872370A CN 109083806 B CN109083806 B CN 109083806B
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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
Abstract
The application relates to the technical field of wind power generation equipment, in particular to a wave wing type blade and a wind turbine. The wave wing type blade is characterized in that a plurality of wave crests and a plurality of wave troughs are continuously distributed on the front edge along the extending direction of the wave wing type blade, a column body is connected between every two adjacent wave crests, the axial direction of the column body is consistent with the extending direction of the wave wing type blade, and the cross sectional area of the column body is far smaller than that of the opposite surface of the wave crests. The utility model provides a wave wing section blade's structure is better stable, firm, the rigidity is stronger, can stable control live the crest because the strong tremor that comes to flow and produce, can also hinder the wearing and tearing of materials such as sand grain that mix with in the coming flow to blade trough position, can also promote the aerodynamic performance of blade greatly.
Description
Technical Field
The application relates to the technical field of wind power generation equipment, in particular to a wave wing type blade and a wind turbine.
Background
With the reduction of energy reserves, the development of new energy sources is the main trend of the current development, and wind energy as clean energy source becomes the main development object. However, at present, the cost for developing wind power generation is higher than the cost for developing traditional energy and other novel energy power generation, so that the wind power generation cannot be widely adopted, wherein the cost is mostly used for capturing wind energy and later maintenance of blades of a wind turbine, the blades are the most core parts of the wind turbine, the working performance of the blades directly influences the power generation efficiency of the whole wind power generator, the power generation efficiency of the wind power generator is improved, namely, the price competitiveness of the wind power generation is improved, the cost performance of the wind power generation is improved, and the cost is reduced. Therefore, it is important to improve the performance of the blade to increase the price competitiveness and reduce the cost of wind power generation.
In the development of wind power, people are continuously exploring methods for improving the power generation efficiency, and how to improve the output power of the blades is an important research topic. The existing bionic wave front edge wing type wind turbine blade has the advantages that the blade has better aerodynamic performance and higher output power due to the structural characteristics of the blade, but the blade has the wave front edge wing type structure with obvious wave crests and wave troughs, so that the stability of the front edge of the blade is poorer, particularly, at present, some researches are carried out to manufacture the blade by adopting a light-weight material for improving the output power of the blade, the blade made of the material is light in weight and is generally brittle in quality, so that the blade is poorer in stability, and meanwhile, the blade is easy to wear and even break in the use process, the service life of the blade and even the service life of the whole wind turbine are reduced, even if the blade can be maintained, the maintenance cost is increased, the use cost is increased, and the wind power generation with higher cost is not easy to widely adopt. Therefore, it is also very important to ensure good stability of the blade while increasing the output power of the blade.
Disclosure of Invention
The application provides a wave wing section blade and wind turbine to improve the output power of blade, and solve the current poor problem of wave wing section blade stability.
A first aspect of the present application provides a wavy airfoil blade, comprising:
the wave wing type blade is characterized in that a plurality of wave crests and a plurality of wave troughs are continuously distributed on the front edge along the extending direction of the wave wing type blade, a column body is connected between every two adjacent wave crests, the axial direction of the column body is consistent with the extending direction of the wave wing type blade, and the cross sectional area of the column body is far smaller than that of the opposite surface of the wave crests.
Compared with the prior art, a cylinder with a smaller cross section area is connected between two adjacent wave crests, and the axial direction of the cylinder is consistent with the extending direction of the blade, namely, the cylinder with the smaller cross section area is transversely arranged between the two wave crests, so that the structure of the blade is better, stable, firm and stronger, and the tremble of the wave crests generated by strong incoming flow can be stably controlled; due to the blocking of the column body, the abrasion of substances such as sand grains and the like which are mixed in the incoming flow to the wave trough part of the blade can be hindered to a certain extent; in addition, because the cross-sectional area of cylinder is less, its weight is also lighter relatively, the weight of this blade just can not have obvious increase like this, output also can not have obvious reduction, the aerodynamic performance of this blade also can not have obvious decline, on the contrary, this cylinder can play the effect of disturbing trough department nature incoming flow and crest department incoming flow, make two incoming flows can not produce the interference vortex in trough department the place ahead, thereby make the flow separation of trough department postpone, and then make whole wave airfoil blade take place the attack angle increase of stall, thereby promote the aerodynamic performance of blade greatly.
Furthermore, the wave wing type blade comprises a plurality of the columns, at most one column is correspondingly arranged on each wave trough, and two ends of each column are directly lapped on two adjacent wave crests.
Compared with the method that one column body directly penetrates through the whole blade, the method reduces the usage amount of column body materials, reduces the weight of the column body, further reduces the weight of the blade and enables the reduction range of the output power of the blade to be smaller; on the other hand, the strength and the toughness of the steel plate are improved by changing a longer column body into a plurality of shorter column bodies.
Furthermore, smooth welding is adopted between the column body and the wave crest connected with the column body.
Therefore, the smoothness of the surface of the blade can be improved, the influence on the trend of the incoming flow is reduced, and the pneumatic performance of the blade is improved.
Furthermore, a plurality of the cylinders and a plurality of the wave troughs are arranged in a one-to-one correspondence manner.
A plurality of cylinders and a plurality of trough one-to-one set up, set up the cylinder for partial trough department, partial trough 120 department does not set up the cylinder, and the structure of blade is more stable, and the rigidity is stronger, and the tremble of crest is lived in control that can be more firm, and the blade blocks that to come to flow the ability of the sand grain that is mingled with just also stronger, and the degree of wear of blade is just also littleer, and the interference trough department comes to flow naturally and the ability that crest department came to flow is stronger, more can further promote the aerodynamic performance of blade.
Furthermore, the cylinder is a cylinder, and the diameter of the cylinder is greater than or equal to 0.02 times of chord length and less than or equal to 0.1 times of chord length.
The distance range from one side of the column body facing the wave trough to the bottom end of the wave trough is greater than or equal to 0.1 time of chord length and less than or equal to 0.3 time of chord length.
The cylindrical column can improve the smoothness of the column 130 to minimize the influence on the tendency of the incoming flow. Adopt above-mentioned cylinder diameter and cylinder to obtain better wave wing section blade of this application towards the value scope of the distance of one side to the trough bottom of trough, obtain less and reasonable size's cylinder, make its increase can not obviously increase the weight of blade to and the gap between the leading edge of less and reasonable cylinder and trough, make the mixture come and flow and can't produce great disturbance vortex, thereby restrain earlier flow separation, and then improve the aerodynamic performance of blade.
Further, the diameter of the cylinder is 0.04 times the chord length;
the distance from one side of the column body facing the wave trough to the bottom end of the wave trough is 0.2 times of chord length.
The blade manufactured according to the size can achieve maximum performance optimization, and the output power of the blade is greatly improved.
Further, the distances between every two adjacent peak tops are equal, and the distances between every two adjacent peak tops and the trough bottom are equal.
Therefore, the uniform pressure difference resistance can be obtained at the wave structure part, and the stability of the blade is improved.
Further, the wave crest and the wave trough are arranged in the middle of the wavy airfoil blade.
Therefore, the wave structure part of the wave wing-shaped blade can be effectively utilized, the aerodynamic performance of the blade is improved, the cost is reduced, and the price competitiveness of wind power generation is improved.
Further, the cylinder is made of a wear resistant material.
The wear resistance of the cylinder can be improved, the service life of the cylinder is prolonged, the service life of the blade is prolonged, the later maintenance cost of the blade is increased, the wind power generation cost is reduced, and the price competitiveness of wind power generation is improved.
The first aspect of the application provides a wind turbine which comprises at least three wavy airfoil blades, wherein the wavy airfoil blades are uniformly arranged.
The wind turbine provided by the application improves the power generation power, reduces the cost of the wind turbine, improves the price competitiveness of the wind turbine and further can be widely adopted.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic illustration of a wind turbine according to an embodiment of the present disclosure;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of a wavy airfoil blade according to an embodiment of the present disclosure;
FIG. 4 is a cross-sectional view B-B of FIG. 3;
FIG. 5 is a cut-away view of a wavy airfoil blade provided by an embodiment of the present application;
FIG. 6 is a graph comparing data of a wavy airfoil blade provided by an embodiment of the present application with that of a wavy airfoil blade in the prior art;
FIG. 7 is a flow chart of a prior art wavy airfoil blade at a valley;
fig. 8 is a flow chart of the flow at the trough of a wavy airfoil blade according to an embodiment of the present application.
Reference numerals:
1-a wind turbine;
10-wave airfoil blades (called blades for short);
110-wave peak;
111-peak top;
120-trough;
130-a column;
140-middle part;
150-root;
160-tip;
170-a gap;
180-blade leading edge;
190-the trailing edge of the blade;
20-a nacelle;
30-a tower;
40-fairing.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1 to 4, the present embodiment provides a wave airfoil blade 10, the wave airfoil blade 10 is used as a blade of a wind turbine for wind power generation, the wave airfoil blade 10 includes a plurality of wave crests 110 and a plurality of wave troughs 120 continuously distributed along the extending direction of the blade 10 at the leading edge 180 of the blade, the plurality mentioned in the present application is at least two or more specific numbers, a column 130 is connected between two adjacent wave crests 110, the arrangement direction of two adjacent wave crests 110 is the same as the axial direction of the column 130 connected with the two, and the cross-sectional area of the column 130 is much smaller than the cross-sectional area of the opposite side of the wave crest 110 connected with the column 130, it can also be said that the volume of the column 130 is much smaller than the volume of the wave crest 110 of the blade 10, the column 130 only occupies a smaller part of the blade 10, the weight of the column 130 is also relatively light, there is no significant increase in the weight of the entire blade 10, so there is no significant decrease in the power output of the blade 10 and no significant decrease in the aerodynamic performance of the blade 10. On the premise of ensuring that the rigidity of the blade 10 meets the functional requirements, the blade 10 can be made of a light-weight material, such as an aluminum alloy, a metal or non-metal composite material, so as to further reduce the weight of the blade and reduce the reduction range of the output power of the blade 10.
Compared with the prior art, a column 130 with a smaller cross section area is connected between two adjacent wave crests 110, and the arrangement direction of the adjacent wave crests 110 is the same as the axial direction of the column 130, that is, a column 130 with a smaller cross section area is transversely arranged between the two wave crests 110, so that the structural arrangement ensures that the structure of the blade 10 is better stable, firm and stronger, and the vibration of the wave crests 110 caused by strong incoming flow can be stably controlled; due to the blocking of the column 130, the abrasion of the materials such as sand grains and the like included in the incoming flow to the wave trough 120 part of the blade 10 can be hindered to a certain extent; in addition, because the cross-sectional area of the cylinder 130 is smaller, the weight of the cylinder is relatively lighter, so that the weight of the blade 10 cannot be obviously increased, the output power cannot be obviously reduced, the aerodynamic performance of the blade 10 cannot be obviously reduced, on the contrary, the cylinder 130 can play a role in disturbing the natural incoming flow at the valley 120 and the incoming flow at the peak 110, so that two incoming flows cannot generate disturbing vortexes in front of the valley 120, the flow separation at the valley 120 is delayed, the attack angle of the whole wave airfoil blade 10 in stalling is increased, and the aerodynamic performance of the blade 10 is greatly improved.
Specifically, as shown in fig. 7 and 8, fig. 7 is a flow chart of a valley of a conventional wavy airfoil blade, fig. 8 is a flow chart of a valley of a wavy airfoil blade provided in an embodiment of the present application, lines with different depths in the drawing represent different speed flows, and the darker the color represents the faster the speed, as can be seen from fig. 7, the trailing edge of the conventional wavy airfoil blade has entered deep stall, flow separation has started to occur at the middle position of the suction surface, and disturbance vortex on the surface of the blade is very large, which may seriously cause a rapid decrease in the aerodynamic performance of the blade. As can be seen from fig. 8, the wave airfoil blade 10 provided by the present application, due to the existence of the column 130, makes the position of the wave trough 120 on the leeward side, and after the natural incoming flow bypasses the column 130, increases its own momentum, thereby generating a certain pressure difference; the pressure of the lower pressure surface at the wave crest 110 is higher, so that the airflow flows upwards from the pressure surface below the wave crest 110 to generate attached vortexes; the incoming flow at the peak 110 and the incoming flow of the cylinder 130 are mixed at the gap 170 (shown in fig. 1) between the cylinder 130 and the leading edge of the wave trough 120 and then flow together toward the trailing edge of the wave trough 120, but the former gap 170 is small, so that the mixed incoming flow cannot generate large disturbance vortex, thereby inhibiting the earlier flow separation. Thus, the presence of the post 130 disturbs the natural incoming flow and the flow from both sides of the wave crest, so that the amount of turbulence at the suction surface at the location of the wave trough 120 is reduced, the flow disturbance is reduced and the stall at the surface of the blade 10 is delayed. The wave trough position of the existing wave wing type blade has earlier flow separation, the surface of the blade has larger disturbance and larger turbulent motion amount. However, the wave airfoil blade 10 provided by the embodiment of the present application can reduce the disturbance of the airflow and delay the surface stall of the blade 10, thereby significantly improving the aerodynamic performance of the wave airfoil blade 10 compared to the existing wave airfoil blade.
As shown in fig. 6, a data comparison graph of lift and resistance coefficients of the wave airfoil blade provided by the embodiment of the present application and the existing wave airfoil blade is shown, as can be seen from fig. 6, in the process of increasing the attack angle gradually, the lift coefficient of the wave airfoil blade 10 provided by the present application is higher than that of the existing wave airfoil blade, and the lift coefficient is increased by nearly 10% within the optimal attack angle range (8-18 degrees) of the horizontal axis wind turbine, and the wave airfoil blade 10 provided by the embodiment of the present application further delays the stall attack angle backwards by 1-3 degrees. As can be seen from the resistance coefficient data in the graph, before the angle of attack is 10 degrees, the resistance coefficient of the wave airfoil blade 10 provided by the embodiment of the present application is higher than that of the existing wave airfoil blade, which is because the existence of the column 130 increases the frictional resistance on the surface of the blade 10, so that the abrasion of the materials such as sand particles and the like mixed in the incoming flow to the blade 10 can be prevented, the service life of the blade 10 is further prolonged, and the later maintenance cost is reduced; after the angle of attack is 10 degrees, the resistance coefficient of the wave airfoil blade 10 provided by the embodiment of the present application gradually becomes gentle with the increase of the angle of attack, and is lower than the resistance coefficient of the existing wave airfoil blade, because the pressure difference resistance of the wave airfoil blade 10 provided by the embodiment of the present application is lower than the pressure difference resistance of the existing wave airfoil blade, no disturbance vortex is generated at the front edge of the wave trough 120, and the aerodynamic performance of the blade 10 is further improved.
In an alternative embodiment, the column 130 may be a long column 130, and the long column 130 may directly penetrate through the entire blade 10, so that the manufacturing process is simple. Another preferred embodiment is that the blade 10 may have a plurality of shorter cylinders 130, each of the wave troughs 120 may have one cylinder 130, or some of the wave troughs 120 may have a cylinder 130, some of the wave troughs 120 have no cylinder 130, of course, each of the wave troughs 120 has one cylinder 130, that is, the plurality of cylinders 130 and the plurality of wave troughs 120 are arranged in a one-to-one correspondence manner, compared with the method that the cylinders 130 are arranged at some of the wave troughs 120 and some of the wave troughs 120 have no cylinder 130, the blade 10 has a more stable structure and a higher rigidity, and can more firmly control the vibration of the wave crest 110, the blade 10 has a higher ability to block sand particles included in incoming flow, the blade 10 has a lower degree of wear, the natural incoming flow at the wave troughs 120 and the incoming flow at the wave crest 110 have a higher ability to interfere with each other, and the aerodynamic performance of the blade 10 can be further improved. Compared with the alternative embodiment that one cylinder 130 directly penetrates the whole blade 10, the preferred embodiment reduces the material consumption of the cylinder 130, reduces the weight of the cylinder 130, further reduces the weight of the blade 10, and reduces the reduction range of the output power of the blade 10; on the other hand, the strength and toughness of the column 130 are improved by changing a longer column 130 into a plurality of shorter columns 130.
In specific implementation, two ends of each column 130 may be directly connected to two adjacent wave crests 110 in a welding, bonding, clamping, riveting, or the like manner, preferably, smooth welding may be adopted, so that the smoothness of the blade surface may be improved, the influence on the incoming flow direction may be reduced, and the aerodynamic performance of the blade 10 may be improved. In addition, in order to improve the smoothness of the column 130 and minimize the influence on the trend of the incoming flow, the column 130 of the embodiment of the present application may be a cylinder.
In addition, as shown in fig. 3, in order to effectively utilize the wave structure portion of the wave airfoil blade 10, reduce the cost and improve the price competitiveness of wind power generation while improving the aerodynamic performance of the blade 10, the wave structure portion (i.e., the portion having the wave crest 110 and the wave trough 120) of the wave airfoil blade 10 may be disposed only at the middle 140 of the blade 10, and the root 150 and the tip 160 are not disposed. Further, in order to obtain a more uniform pressure difference resistance at the wave structure portion and improve the stability of the blade 10, the distance between every two adjacent peak tops 111 may be equal, and the distance between every two adjacent peak tops 111 and the bottom of the wave trough 120 may be equal.
As shown in FIG. 5, where the various features of the blade 10 are labeled, C is the chord length (i.e., the distance from the bottom of the trough 120 to the edge of the trailing edge 190 of the blade), λ is the wavelength (i.e., the distance between the tops of two adjacent peaks 110), A is the amplitude (i.e., the distance between the top 111 of a peak and the bottom of the trough 120), d is the diameter of the cylinder 130 (cylinder), and L is the distance from the side of the cylinder 130 facing the trough 120 to the bottom of the trough 120. The inventor obtains the parameter values of the invariants (wavelength lambda, amplitude A and the like) of the wave airfoil blade 10 tested in the application, namely the range of the wavelength lambda is [0.25C, 0.5C ] according to the experiment accumulated experience and the part size parameters of the existing wave airfoil blade]Amplitude A is in the range of [0.025C, 0.12C]Therefore, the size data of the diameter d of the cylinder 130 and the distance L from the side of the cylinder 130 facing the wave trough 120 to the bottom end of the wave trough 120 are deduced through experiments and theories, specifically, as can be known from the momentum-phyllting theory, the generating efficiency of the wind turbine is directly influenced by the lift-drag ratio of the blade, the Reynolds number Re, the Mach number Ma and the attack angle α corresponding to the operating condition of the blade are set, and the lift-drag ratio C of the wave airfoil blade 10 is setld2Lift-drag ratio C of existing wavy airfoil blade under same working conditionld1For comparison, the maximum function f (x) max (C) in MATLAB is usedld1/Cld2) Solving, and finally obtaining the range of the diameter d of [0.02C, 0.1C through calculation]L is in the range of [0.1C, 0.3C]That is, the diameter of the cylinder 130 is greater than or equal to 0.02 times of the chord length and less than or equal to 0.1 times of the chord length, and the distance range from the side of the cylinder 130 facing the trough 120 to the bottom end of the trough 120 is greater than or equal to 0.1 times of the chord length and less than or equal to 0.3 times of the chord length. By means of the foregoing straight barsThe value range of the diameter d and the distance L can obtain the superior wave airfoil blade 10 of the present application, obtain the cylinder 130 with smaller and reasonable size, so that the increase of the cylinder 130 per se can not obviously increase the weight of the blade 10, and the gap 170 between the leading edges of the cylinder 130 and the wave trough 120 is smaller and reasonable, so that the mixed incoming flow can not generate larger disturbance vortex, the earlier flow separation is inhibited, and the aerodynamic performance of the blade 10 is improved.
More preferably, the inventor selects, in simulation verification and analysis, a size parameter of the wave airfoil blade having aerodynamic performance superior to that of the existing wave airfoil blade, that is, λ ═ 0.25C, a ═ 0.12C, and accordingly obtains an optimized size of the diameter d and the distance L, that is, d ═ 0.04C, and L ═ 0.2C. The wavy airfoil blade 10 manufactured according to the size can achieve performance optimization to a greater extent, the output power of the blade 10 is greatly improved, and the aerodynamic performance of the blade 10 is improved.
In addition, in order to improve the wear resistance of the cylinder 130, to improve the lifespan of the cylinder 130, thereby prolonging the service life of the blade 10, reducing the maintenance cost of the blade 10 at the later stage, on the premise that the rigidity of the blade 10 meets the functional requirements, the cylinder 130 can be made of a wear-resistant material, such as high manganese steel (ZGMn13), high manganese alloy (ZGMn13Cr2MoRe), ultra-high manganese alloy (ZGMn18Cr2MoRe), high, medium and low chromium alloy cast iron (such as Cr15MOZCU), medium, low and high carbon multi-element alloy steel (such as ZG40SiMnCrMO and ZG35Cr2MoNiRe), Austemper Ductile Iron (ADI), various composite or gradient materials, hard alloy materials and the like, because of the small volume of the cylinder 130, the use of such wear resistant materials as previously described does not significantly increase the weight of the blade 10, does not significantly reduce its output, but the cost of the later maintenance of the blade is reduced, the wind power generation cost is reduced, and further the price competitiveness of the wind power generation is improved.
As shown in FIG. 1, the embodiment of the present application further provides a wind turbine 1, the wind turbine 1 includes any one of the wavy airfoil blades 10, a nacelle 20, a tower 30 and a fairing 40, the wind turbine 1 includes at least three blades 10, a root 150 of each blade 10 is fixedly connected to the periphery of the fairing 40, the blades 10 are uniformly distributed along the periphery of the fairing 40, the fairing 40 is fixedly connected with the nacelle 20, and the nacelle 20 is mounted on the tower 30. The embodiment of the application improves the output power of the wavy airfoil blade 10, further improves the power generation power of the wind turbine 1, reduces the cost of the wind turbine 1, improves the price competitiveness of the wind turbine 1, and further enables the wind turbine 1 to be widely adopted.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A wavy airfoil blade (10), comprising:
the wave airfoil blade is characterized in that a plurality of wave crests (110) and a plurality of wave troughs (120) are continuously distributed on the front edge along the extending direction of the wave airfoil blade (10), a column body (130) is connected between every two adjacent wave crests (110), the axial direction of the column body (130) is consistent with the extending direction of the wave airfoil blade (10), and the cross sectional area of the column body (130) is far smaller than that of the opposite surface of the wave crests (110).
2. The wavy airfoil blade (10) of claim 1,
the wave trough structure comprises a plurality of columns (130), wherein at most one column (130) is correspondingly arranged on each wave trough (120), and two ends of each column (130) are directly lapped on two adjacent wave crests (110).
3. The wavy airfoil blade (10) of claim 2,
the column body (130) and the wave crest (110) connected with the column body are smoothly welded.
4. The wavy airfoil blade (10) of claim 2,
the columns (130) are arranged in one-to-one correspondence with the troughs (120).
5. The wavy airfoil blade (10) of claim 2,
the cylinder (130) is a cylinder, the diameter of the cylinder is more than or equal to 0.02 time of chord length and less than or equal to 0.1 time of chord length;
the distance range from one side of the column body (130) facing the wave trough (120) to the bottom end of the wave trough (120) is greater than or equal to 0.1 times of chord length and less than or equal to 0.3 times of chord length.
6. The wavy airfoil blade (10) of claim 5,
the diameter of the cylinder (130) is 0.04 times the chord length;
the distance from one side of the column body (130) facing the wave trough (120) to the bottom end of the wave trough (120) is 0.2 times of chord length.
7. The wavy airfoil blade (10) of claim 1,
the distances between every two adjacent peak tops (111) are equal, and the distances between every two adjacent peak tops (111) and the bottoms of the wave troughs (120) are equal.
8. The wavy airfoil blade (10) of claim 7,
the wave crest (110) and the wave trough (120) are arranged at the middle position of the wave airfoil blade (10).
9. The wavy airfoil blade (10) of claim 1,
the cylinder (130) is made of a wear resistant material.
10. A wind turbine (1) comprising a wavy airfoil blade (10) according to any one of claims 1 to 9, wherein at least three wavy airfoil blades (10) are provided, and each wavy airfoil blade (10) is uniformly arranged.
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| AT522086B1 (en) * | 2019-03-19 | 2020-08-15 | Schmidt Michael | AERODYNAMIC COMPONENT |
| CN113482843B (en) * | 2021-08-05 | 2022-08-05 | 大连理工大学 | Bionic wing-shaped vertical shaft water turbine power generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4886421A (en) * | 1984-01-09 | 1989-12-12 | Wind Feather, United Science Asc. | Wind turbine air foil |
| EP1338793A3 (en) * | 2002-02-22 | 2010-09-01 | Mitsubishi Heavy Industries, Ltd. | Serrated wind turbine blade trailing edge |
| CN201428551Y (en) * | 2009-07-22 | 2010-03-24 | 中国科学院工程热物理研究所 | Wind generator blade employing concave-convex front edge structure |
| CN201461226U (en) * | 2009-08-05 | 2010-05-12 | 中国科学院工程热物理研究所 | Vane |
| US9249666B2 (en) * | 2011-12-22 | 2016-02-02 | General Electric Company | Airfoils for wake desensitization and method for fabricating same |
| DK3096003T3 (en) * | 2015-05-21 | 2021-05-10 | Siemens Gamesa Renewable Energy As | Rotor wing with notches for a wind turbine |
| EP3112667B1 (en) * | 2015-06-30 | 2020-08-26 | Vestas Wind Systems A/S | Anti-oscillation tool |
| US10240576B2 (en) * | 2015-11-25 | 2019-03-26 | General Electric Company | Wind turbine noise reduction with acoustically absorbent serrations |
| JP2017120072A (en) * | 2015-12-28 | 2017-07-06 | 明久 松園 | Corrugated plate-type lifting force enhancement blade |
| CN206707918U (en) * | 2017-02-10 | 2017-12-05 | 中国电力工程顾问集团华北电力设计院有限公司 | Waveform trailing edge blade and H type vertical-shaft aerogenerators |
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