CN110080937B - Wind driven generator blade for broadband active control - Google Patents
Wind driven generator blade for broadband active control Download PDFInfo
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- CN110080937B CN110080937B CN201910419447.5A CN201910419447A CN110080937B CN 110080937 B CN110080937 B CN 110080937B CN 201910419447 A CN201910419447 A CN 201910419447A CN 110080937 B CN110080937 B CN 110080937B
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- exciter
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- 238000000926 separation method Methods 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000741 silica gel Substances 0.000 claims description 12
- 229910002027 silica gel Inorganic materials 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 208000028659 discharge Diseases 0.000 description 68
- 230000000694 effects Effects 0.000 description 7
- 230000004044 response Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001228 spectrum 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0256—Stall control
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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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Plasma Technology (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a broadband wind driven generator blade for active control, which comprises a blade body and a plurality of jet parts, wherein the plurality of jet parts are arranged below the surface of the blade body, the plurality of jet parts are arranged along the upstream side of an airflow separation line on the surface of the blade body and are mainly arranged at a high-lift section close to a blade tip, a plurality of jet outlets communicated with jet ports of the jet parts are formed in the surface of the blade body, and the jet parts are low Reynolds number plasma synthetic jet actuators. The invention drives the plasma synthetic jet exciter through the high-frequency direct-current pulse power supply to generate high-speed synthetic jet, controls the flow on the surface of the blade of the wind driven generator, overcomes the flow separation of the suction surface of the blade by a jet active control method, can have high aerodynamic performance in a larger incoming flow attack angle range, reduces the working resistance and unsteady aerodynamic load of the blade of the wind driven generator, and improves the power generation efficiency and stability of the wind driven generator.
Description
Technical Field
The invention belongs to the field of active control of wind driven generator blades, and particularly relates to a wind driven generator blade for broadband active control.
Background
With the increasing energy crisis, many countries are developing renewable energy sources, wind energy is an important component of the renewable energy sources, and the number of wind power generators is huge worldwide. The research on the aerodynamic characteristics of the wind driven generator blade has great significance in improving efficiency and stability.
When a common horizontal axis wind turbine runs, the working environment is complex, the change of the pneumatic parameters (speed, incoming flow incidence angle and the like) of incoming flow gas is large, when the incoming flow angle exceeds the critical incidence angle of a blade airfoil profile, the phenomenon of dynamic stall of a blade caused by unsteady separation of airflow is easy to occur, the unsteady pneumatic load of the wind turbine is increased, great influence is generated on the pneumatic performance and the structural fatigue life of the wind turbine, and the power generation efficiency and the service life of the wind turbine are reduced.
In the field of active control of the blades of the wind driven generator at present, a blowing and sucking control scheme is widely applied, a local or global flow field structure is changed based on a dielectric barrier discharge plasma exciter and a piezoelectric film synthetic jet exciter, and the aerodynamic loss generated by flow separation is effectively reduced. The prior art blower/suction gas flow control scheme requires additional gas sources, piping and control valves, thereby adding more extra weight and decreasing system reliability due to the complicated structure. A wind driven generator blade based on a dielectric barrier discharge plasma exciter improves the aerodynamic characteristics of the surface of the blade, but the structure of the dielectric barrier discharge plasma exciter determines that the surface of the blade must be provided with a protruding structure, obviously, the surface resistance of the wind driven blade is increased, and the design leads the blade to have more stable aerodynamic characteristics but loses efficiency; a synthetic jet exciter for periodically blowing or sucking air by repeatedly oscillating piezoelectric film to transform the consumed electric energy into fluid kinetic energy features that the local or global flow field structure is improved, the pneumatic loss is reduced, but its momentum output power is weak, control power is weak and response frequency is low.
Therefore, in the field of wind power generation, a blade with excellent active control capability is urgently needed, and the blade has the advantages of small additional weight, simple structure, stable operation, strong control capability, wider operating frequency and the like, so that the blade of the wind power generator has excellent aerodynamic characteristics and stability under complex working conditions.
Disclosure of Invention
In view of this, the present invention is directed to a broadband active control wind turbine blade, which has a relatively wide active control response frequency, a relatively high control capability to improve the aerodynamic performance of the blade, and a simple additional structure.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a broadband is aerogenerator blade for active control, it includes blade body and a plurality of efflux part, a plurality of the efflux part is arranged in the below of the surface of blade body, a plurality of the efflux part is arranged along the upstream side of blade body surface air flow separation line, and mainly arranges in the high lift section department that is close to the apex, offers a plurality of efflux exports with the efflux mouth intercommunication of efflux part on the surface of blade body, the efflux part is low reynolds number plasma synthesis efflux exciter.
Further, every synthetic efflux exciter of low reynolds number plasma all include cushion chamber, discharge chamber, anode discharge electrode, cathode discharge electrode and heat-resisting silica gel, the discharge chamber set up inside the cushion chamber, the discharge chamber set up in the cushion chamber bottom, evenly seted up a plurality of low-speed jet orifices at the upper wall of cushion chamber, low-speed jet orifice for the jet orifice of exciter, penetrate anode discharge electrode and cathode discharge electrode at the lower wall of discharge chamber, and use heat-resisting silica gel is fixed and sealed, evenly seted up a plurality of high-speed jet orifices at the upper wall of discharge chamber.
Further, every synthetic efflux exciter of low reynolds number plasma all include cushion chamber, discharge chamber, anode discharge electrode, cathode discharge electrode and heat-resisting silica gel, the discharge chamber is fixed the outside of cushion chamber, the discharge chamber set up in the bottom of cushion chamber, penetrate anode discharge electrode and cathode discharge electrode at the diapire of discharge chamber, and use heat-resisting silica gel is fixed and sealed, has evenly seted up a plurality of high-speed efflux mouths at the roof of discharge chamber, set up the through-hole with high-speed efflux mouth one-to-one at the diapire of cushion chamber, and through-hole and high-speed efflux mouth size suit, evenly seted up a plurality of low-speed efflux mouths at the roof of cushion chamber, low-speed efflux mouth be the efflux mouth of exciter.
Further, the sum of the cross-sectional areas of all the low-speed jet ports is larger than the sum of the cross-sectional areas of all the high-speed jet ports.
Further, the jet flow outlet on the surface of the blade body is matched with the low-speed jet flow port of the exciter and is a hole or a seam, specifically a straight hole, an inclined hole, a straight seam or an inclined seam.
Further, a buffer cavity is prefabricated on the inner surface of the blade body, the material of the buffer cavity is the same as that of the blade body, and the discharge cavity is assembled to the buffer cavity.
Further, polish at blade body lower surface and form the cushion chamber, assemble the chamber of discharging to the cushion chamber.
Furthermore, an active control system for adjusting the discharge frequency of the exciter according to the aerodynamic characteristics of the real-time flow field on the surface of the wind driven generator blade is arranged on the blade body.
Furthermore, the anode discharge electrode and the cathode discharge electrode are powered by a high-pulse power supply, and the pulse power supply is used for adjusting the strength of the jet flow under different working conditions of the wind driven generator.
Furthermore, the cavity wall of the discharge cavity is made of an insulating material, and a flow guide structure is arranged in the buffer cavity.
Compared with the prior art, the wind driven generator blade for broadband active control has the following advantages:
1. the blade has the advantages of simple additional structure, small additional weight and wide response frequency range. Compared with the blade without active control capability, the active control capability of the blade can relieve unsteady aerodynamic load of the blade during working, so that the blade has longer service life compared with the blade of a common wind turbine.
2. The blade has strong local control capability on the surface and good control effect, and enhances control at the main part of the wind turbine blade generating lift force. Due to the characteristics of small geometric dimension and easy installation of a single jet flow component, the plurality of jet flow components are arranged on the surface of the blade of the wind driven generator in an array mode, the jet flow components can be additionally installed on small parts of certain areas according to specific working conditions, and a good local control effect is achieved.
3. The blade of the design has wide working frequency range and real-time response capability of high-frequency control. The wind turbine can realize an adjusting mode based on inflow feedforward, adjust and control the pulse frequency spectrum according to the surface of the blade of the wind driven generator or the characteristics of the inflow real-time flow field, and can obtain a better active control effect compared with the traditional control method.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a broadband active control wind turbine blade according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a fluidic component;
FIG. 3 is a schematic diagram of an arrangement of an exciter with a cylindrical buffer chamber and a straight low-speed jet orifice on a wind turbine blade;
FIG. 4 is a schematic diagram of an arrangement mode of an exciter with a rectangular buffer cavity and a slit low-speed jet port on a wind driven generator blade.
Description of reference numerals:
1-low-speed jet orifice, 2-buffer cavity, 3-high-speed jet orifice, 4-discharge cavity, 5-anode discharge electrode, 6-blade body, 7-low Reynolds number plasma synthetic jet exciter, 8-cathode discharge electrode, 9-high lift section of blade tip, and 10-jet outlet.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-2, a broadband active control wind turbine blade includes a blade body 6 and a plurality of low reynolds number plasma synthetic jet actuators 7, the plurality of low reynolds number plasma synthetic jet actuators 7 are disposed under the surface of the blade body 6, the plurality of low reynolds number plasma synthetic jet actuators 7 are disposed along an upstream side of an airflow separation line on the surface of the blade body 6 and are mainly disposed at a high lift section 9 near a blade tip, and a plurality of jet outlets 10 communicated with jet ports of the low reynolds number plasma synthetic jet actuators 7 are disposed on the surface of the blade body.
The specific structure of the low Reynolds number plasma synthetic jet actuator 7 is as follows: including cushion chamber 2, discharge chamber 4, anode discharge electrode 5, cathode discharge electrode 8 and heat-resisting silica gel, discharge chamber 4 set up inside cushion chamber 2, discharge chamber 4 set up in cushion chamber 2 bottom, evenly seted up a plurality of low-speed jet ports 1 at the upper wall of cushion chamber 2, low-speed jet ports 1 for the jet port of exciter, penetrate anode discharge electrode 5 and cathode discharge electrode 8 at the lower wall of discharge chamber 4, and use heat-resisting silica gel is fixed and sealed, has evenly seted up a plurality of high-speed jet ports 3 at the upper wall of discharge chamber 4.
The specific structure of the low reynolds number plasma synthetic jet actuator 7 can also be as follows: including cushion chamber 2, discharge chamber 4, anode discharge electrode 5, cathode discharge electrode 8 and heat-resisting silica gel, discharge chamber 4 is fixed the outside of cushion chamber 2, discharge chamber 4 set up in the bottom of cushion chamber 2, penetrate anode discharge electrode 5 and cathode discharge electrode 8 at the diapire of discharge chamber 4, and use heat-resisting silica gel is fixed and sealed, has evenly seted up a plurality of high-speed efflux mouth 3 at the roof of discharge chamber 4, sets up the through-hole with 3 one-to-ones of high-speed efflux mouth at the diapire of cushion chamber 2, and through-hole and high-speed efflux mouth size suit, evenly seted up a plurality of low-speed efflux mouth 1 at the roof of cushion chamber 2, low-speed efflux mouth 1 be the efflux mouth of exciter.
The sum of the cross-sectional areas of all the low-speed jet ports 1 is larger than the sum of the cross-sectional areas of all the high-speed jet ports 3.
The jet flow outlet 10 on the surface of the blade body 6 is matched with the low-speed jet flow port 1 of the buffer cavity and is a hole or a seam, in particular a straight hole, an inclined hole, a straight seam or an inclined seam. The specific arrangement may be: a plurality of arrays of holes or a slit are provided in the upper wall of the buffer chamber 2, to which the airfoil jet outlet 10 is adapted.
The buffer cavity 2 is prefabricated on the inner surface of the blade 6, the material of the buffer cavity 2 is the same as that of the blade 6, and the discharge cavity 4 is assembled in the buffer cavity 2.
Alternatively, the lower surface of the blade 6 may be ground to form the buffer chamber 2, and the discharge chamber 4 may be assembled into the buffer chamber 2.
An active control system for adjusting the discharge frequency of the exciter according to the aerodynamic characteristics of the real-time flow field on the surface of the wind driven generator blade is arranged on the blade 6.
The anode discharge electrode 5 and the cathode discharge electrode 8 are powered by a high-frequency pulse power supply, and the pulse power supply is used for adjusting the strength of jet flow and outflow flow under different working conditions of the wind driven generator.
The cavity wall of the discharge cavity 4 is made of insulating materials, and a flow guide structure is arranged in the buffer cavity 2.
In order to make the control effect on the blade body 6 better, a larger control area is necessary, and then a plurality of the exciters 7 are required to be uniformly arranged on the surface of the blade body 6 of the wind driven generator, and can be linearly arranged in a single row or multiple rows, and because the lift force of the wind turbine is mainly arranged at the high lift section 9 of the blade tip of the blade body 6, the high lift section 9 of the blade tip is densely arranged.
The specific structure of the buffer cavity 2 and the discharge cavity 4 can be that the buffer cavity 2 and the discharge cavity 4 are both hollow cylinder structures and are arranged coaxially; the buffer cavity 2 can be a hollow cuboid structure, the discharge cavity 4 is a hollow cylinder structure, and the discharge cavity 4 is arranged right at the bottom of the buffer cavity 2.
The arrangement of the jet flow components with two specific structures on the blade of the wind driven generator is shown in fig. 3 and 4, and fig. 3 shows an arrangement mode on the blade of the wind driven generator when the buffer cavity is a cylinder and the low-speed jet flow port is a straight hole; FIG. 4 shows an arrangement of the buffer chamber on the blade of the wind turbine when the low-speed jet port is a slit.
The speed of the emergent gas flow of the low Reynolds number plasma synthetic jet actuator 7 can be controlled in the order of tens of meters per second, and the low Reynolds number plasma synthetic jet actuator is very suitable for controlling the gas flow separation of the suction surface of the blade of the horizontal axis wind turbine.
The cross-sectional area of the upper part of the buffer cavity 2 is larger than that of the lower part of the buffer cavity 2, so that more low-speed jet ports 1 are arranged, the actual control area of the exciter is increased, and a structure or a component for adjusting and distributing outflow can be added, so that a better control effect is obtained.
The wall of the discharge chamber 4 is made of insulating material. The size, shape and spacing of the anode discharge electrode 5 and the cathode discharge electrode 8 can be set according to specific use requirements, and one recommended mode is that the electrode shape is cylindrical, the diameter is 1mm, and the spacing is 3 mm.
The discharge cavity and the buffer cavity are structurally designed, so that the outflow speed is controlled; the pulse power supply controls the working frequency and amplitude of the exciter, and the outlet state of the jet flow is determined by the combined action of the pulse power supply and the exciter, so that momentum exchange is carried out between the jet flow and outside air flow on the surface of the blade of the wind driven generator, and the effect of active control is achieved.
The working principle of the exciter on the blade is as follows: gas in the discharge cavity 4 is heated and ionized under the discharge action of the anode discharge electrode 5 and the cathode discharge electrode 8, so that the gas in the discharge cavity 4 is expanded, the gas is ejected to the buffer cavity 2 from the high-speed jet port 3, the high-speed gas pressure in the buffer cavity 2 is reduced, the temperature is reduced, the gas is decelerated into low-speed gas under the action of the resistance force, then the gas is ejected from the low-speed jet port 1, the diameter of the buffer cavity 2, the height and the size of the low-speed jet port 1 determine the gas speed of the gas ejected to the surface of the wind driven generator blade body 6, the gas ejected to the surface of the wind driven generator blade body 6 is subjected to momentum exchange with the external gas, and the active control effect. And after the primary discharge is finished, the external gas enters the exciter from the low-speed jet port 1, so that the internal gas parameters of the exciter are restored to the state before the discharge, and one working cycle is finished.
Based on the theoretical description, under the action of broadband control signal input, the broadband direct current pulse power supply drives the low Reynolds number plasma synthetic jet actuator 7 to generate a synthetic jet with higher speed to control the flow of the airfoil.
The jet flow scheme of the blade can also be adapted to a low-frequency active control signal or a high-frequency excitation control signal based on the inflow feedforward of the wind driven generator, the working frequency range is large, and the flow control capability is strong.
Different positions of the blades have different jet flow control requirements due to different flowing states, so that the structural design of the buffer cavity 2 of the jet flow component is different, specifically the cross-sectional area of the buffer cavity 2, the shape and size of the low-speed jet flow port and the specific arrangement of the flow guide structure, and the conditions of the jet flow of the exciter are influenced by the factors, so that the airflow of the blades is influenced, and the airflow around the blades is actively controlled.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A broadband is aerogenerator blade for active control which characterized in that: the plasma synthetic jet flow exciter comprises a blade body (6) and a plurality of jet flow components, wherein the plurality of jet flow components are arranged below the surface of the blade body (6), the plurality of jet flow components are arranged along the upstream side of an airflow separation line on the surface of the blade body (6) and are mainly arranged at a high lift section (9) close to a blade tip, a plurality of jet flow outlets (10) communicated with the jet flow ports of the jet flow components are formed in the surface of the blade body (6), and the jet flow components are low Reynolds number plasma synthetic jet flow exciters (7);
an active control system for adjusting the discharge frequency of the exciter according to the real-time flow field aerodynamic characteristics of the surface of the wind driven generator blade is arranged on the blade body (6);
the pulse power supply controls the working frequency and amplitude of the exciter;
under the action of broadband control signal input, a broadband direct current pulse power supply drives a low Reynolds number plasma synthetic jet exciter (7) to generate high-speed synthetic jet to control the flow of the airfoil.
2. The broadband active control wind turbine blade according to claim 1, wherein: every low reynolds number plasma synthesis efflux exciter (7) all include cushion chamber (2), discharge chamber (4), anode discharge electrode (5), cathode discharge electrode (8) and heat-resisting silica gel, discharge chamber (4) set up the inside of cushion chamber (2), discharge chamber (4) set up in cushion chamber (2) bottom, evenly seted up a plurality of low-speed jet ports (1) at the roof of cushion chamber (2), low-speed jet port (1) be the jet orifice of exciter, penetrate anode discharge electrode (5) and cathode discharge electrode (8) at the diapire of discharge chamber (4), and use heat-resisting silica gel is fixed and sealed, has evenly seted up a plurality of high-speed jet ports (3) at the roof of discharge chamber (4).
3. The broadband active control wind turbine blade according to claim 1, wherein: each low Reynolds number plasma synthetic jet exciter (7) comprises a buffer cavity (2), a discharge cavity (4), an anode discharge electrode (5), a cathode discharge electrode (8) and heat-resistant silica gel, the discharge cavity (4) is fixed outside the buffer cavity (2), the discharge cavity (4) is arranged at the bottom of the buffer cavity (2), an anode discharge electrode (5) and a cathode discharge electrode (8) penetrate through the bottom wall of the discharge cavity (4) and are fixed and sealed by the heat-resistant silica gel, a plurality of high-speed jet orifices (3) are uniformly arranged on the top wall of the discharge cavity (4), through holes which are in one-to-one correspondence with the high-speed jet orifices (3) are arranged on the bottom wall of the buffer cavity (2), the sizes of the through holes are adapted to the sizes of the high-speed jet orifices, a plurality of low-speed jet ports (1) are uniformly formed in the top wall of the buffer cavity (2), and the low-speed jet ports (1) are jet ports of the exciter.
4. The broadband active control wind turbine blade according to claim 2 or 3, wherein: the sum of the cross-sectional areas of all the low-speed jet ports (1) is larger than the sum of the cross-sectional areas of all the high-speed jet ports (3).
5. The broadband active control wind turbine blade according to claim 4, wherein: the jet flow outlet (10) on the surface of the blade body (6) is matched with the low-speed jet flow port (1) of the exciter and is a hole or a seam, in particular a straight hole, an inclined hole, a straight seam or an inclined seam.
6. The broadband active control wind turbine blade according to claim 5, wherein: at prefabricated cushion chamber (2) of blade body (6) internal surface, cushion chamber (2) are the same with blade body (6) material, assemble discharge chamber (4) to cushion chamber (2).
7. The broadband active control wind turbine blade according to claim 5, wherein: the lower surface of the blade body (6) is polished to form a buffer cavity (2), and the discharge cavity (4) is assembled to the buffer cavity (2).
8. The broadband active control wind turbine blade according to claim 7, wherein: the anode discharge electrode (5) and the cathode discharge electrode (8) are powered by a high-frequency pulse power supply, and the pulse power supply is used for adjusting the strength of the jet flow under different working conditions of the wind driven generator.
9. The broadband active control wind turbine blade according to claim 8, wherein: the cavity wall of the discharge cavity (4) is made of insulating materials, and a flow guide structure is arranged in the buffer cavity (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419447.5A CN110080937B (en) | 2019-05-20 | 2019-05-20 | Wind driven generator blade for broadband active control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419447.5A CN110080937B (en) | 2019-05-20 | 2019-05-20 | Wind driven generator blade for broadband active control |
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| CN110080937A CN110080937A (en) | 2019-08-02 |
| CN110080937B true CN110080937B (en) | 2020-06-23 |
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| JP2002115646A (en) * | 2000-10-11 | 2002-04-19 | Mitsubishi Heavy Ind Ltd | Turbine with turbine blade cleaning device |
| CN207111304U (en) * | 2017-04-09 | 2018-03-16 | 泸州职业技术学院 | A kind of synthesizing jet-flow wind energy conversion system stall control device |
| CN109618481B (en) * | 2018-12-14 | 2020-12-11 | 哈尔滨工业大学 | Plasma synthetic jet actuator with low Reynolds number condition |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200623 |