Dynamic stall adjusting device and method for blades of wind driven generator

Abstract

The invention relates to the technical field of wind driven generators, particularly provides a dynamic stall adjusting device and method for blades of a wind driven generator, and aims to solve the technical problem that flow separation occurs at the trailing edge of the blades at a large attack angle. In order to achieve the purpose, the dynamic stall adjusting device for the blade of the wind driven generator comprises a first airflow controller and a second airflow controller which are located in a first slot formed in the front edge of the surface of the blade in the spanwise direction of the blade and a second slot formed in the rear edge of the surface of the blade in the spanwise direction of the blade correspondingly, when the wind driven generator is in a working state, one of the first airflow controller and the second airflow controller blows out gas, and the other one sucks in gas. One of the first airflow controller and the second airflow controller blows out gas in the working state, and the other one sucks the gas in the working state, so that the purpose of changing pressure distribution on the surface of the blade so as to reduce generation of wake vortex is achieved, and the problem that flow separation is generated at the tail edge of the blade at a large attack angle is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbines, and in particular to a device and method for adjusting the dynamic stall of a wind turbine blade. Background Art

[0002] With the development of new energy, the total installed capacity of wind turbines is growing, and the problem of dynamic stall when wind turbine blades are in unsteady motion is becoming more and more prominent. For example, when the blades are in high angle of attack, flow separation will occur at the trailing edge of the blades, affecting the utilization of wind energy and posing a safety hazard.

[0003] Accordingly, the art needs a new wind turbine blade dynamic stall adjustment device to solve the above problems. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present application is proposed to solve or at least partially solve the technical problem of flow separation occurring at the trailing edge of the blade at a large angle of attack.

[0005] In a first aspect, a dynamic stall adjustment device for wind turbine blades is provided, comprising: a first airflow controller and a second airflow controller, which are respectively located in a first narrow slot arranged along the blade span direction at the leading edge of the blade surface and a second narrow slot arranged along the blade span direction at the trailing edge, wherein, when the wind turbine is in a working state, one of the first airflow controller and the second airflow controller blows out gas and the other inhales gas.

[0006] In a technical solution of the above-mentioned dynamic stall regulating device for wind turbine blades, when the wind turbine is in operation, a speed of blowing out gas from one of the first airflow controller and a speed of sucking gas from the other of the first airflow controller are the same.

[0007] In a technical solution of the above-mentioned dynamic stall regulating device for wind turbine blades, the first airflow controller and the second airflow controller are any one of an air pump, a blower and a fan.

[0008] In a second aspect, a method for dynamic stall regulation of wind turbine blades using the device of the first aspect or any corresponding technical solution is provided, the method comprising: obtaining a blade aerodynamic response and a corresponding stability value, wherein the blade aerodynamic response is used to describe the force condition of the blade, and the stability value represents the blade aerodynamic response value when the blade is in stable operation; minimizing the deviation between the blade aerodynamic response and the stability value is used as an optimization goal, and controlling one of the first airflow controller and the second airflow controller to blow out gas and the other to inhale gas.

[0009] In a technical solution of the above-mentioned method for dynamic stall regulation of wind turbine blades, minimizing the deviation between the aerodynamic response of the blade and the stable value is taken as the optimization goal, and one of the first airflow controller and the second airflow controller is controlled to blow out gas and the other to inhale gas, including: calculating the momentum coefficient according to the deviation between the aerodynamic response of the blade and the stable value, and the momentum coefficient is used to indicate the strength of the jet generated by the blown gas; calculating the speed of the blown gas according to the momentum coefficient; and controlling the first airflow controller to blow out gas and the second airflow controller to inhale gas based on the calculated speed.

[0010] In a technical solution of the above-mentioned method for adjusting the dynamic stall of a wind turbine blade, the step of calculating the velocity of the blown gas according to the momentum coefficient includes: calculating the velocity V of the blown gas using the following formula:

[0011] Among them, C μ represents the momentum coefficient, represents the mass flow rate of the blown gas, ρ ∞ Indicates the density of the incoming wind, V ∞ It represents the speed of the incoming air flow, and S represents the opening area for blowing out the gas.

[0012] In a technical solution of the above-mentioned dynamic stall adjustment method for wind turbine blades, the first airflow controller blows out gas and the second airflow controller inhales gas based on the calculated speed control, including: when the calculated speed is greater than zero, the first airflow controller blows out gas and the second airflow controller inhales gas; when the calculated speed is less than zero, the first airflow controller inhales gas and the second airflow controller blows out gas.

[0013] In a third aspect, a smart device is provided, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the method in the above-mentioned second aspect or any corresponding technical solution thereof is implemented.

[0014] In a fourth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, wherein the program codes are suitable for being loaded and run by a processor to execute the method in the above-mentioned second aspect or any corresponding technical solution thereof.

[0015] In a fifth aspect, a wind turbine system is provided, comprising: the smart device described in the third aspect above; and a wind turbine, comprising blades and the apparatus described in the first aspect or any corresponding technical solution thereof; wherein the smart device is communicatively connected to the apparatus.

[0016] The above one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0017] In the technical solution for implementing the present application, a first narrow slot and a second narrow slot are respectively arranged on the leading edge and the trailing edge of the blade surface along the span direction of the blade, and gas is blown out or inhaled through an airflow controller in the narrow slot, thereby achieving the purpose of changing the pressure distribution on the blade surface and reducing the generation of wake vortex, and effectively improving the problem of flow separation at the trailing edge of the blade at large angles of attack.

[0018] In the technical solution for implementing the present application, by controlling the first airflow controller and the second airflow controller to start and stop synchronously, with one blowing out air and the other inhaling air, the conservation of momentum is achieved to improve the operating stability of the blades.

[0019] In the technical solution for implementing the present application, by minimizing the deviation between the aerodynamic response of the blade and the corresponding stable value and comparing it with the strength of the jet generated by the blown gas, the purpose of automatically and quantitatively controlling the airflow controller is achieved, thereby achieving the effect of improving flow separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present application will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. Among them:

[0021] Figure 1 is a schematic diagram of an airfoil in the related art;

[0022] Figure 2 is a schematic diagram of a wind turbine blade dynamic stall adjustment device according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a wind turbine blade dynamic stall adjustment device according to another embodiment of the present application;

[0024] Figure 4 is a schematic diagram of a jet of a wind turbine blade dynamic stall regulating device according to an embodiment of the present application;

[0025] Figure 5 This is a schematic flow chart of the main steps of a method for adjusting a wind turbine blade's dynamic stall according to an embodiment of the present application;

[0026] Figure 6 It is a schematic diagram of the main structure of a smart device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0028] In the description of the present application, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, it can be indirectly connected through an intermediate medium, it can also be the internal communication of two elements, it can be a wireless connection, or it can be a wired connection.

[0029] The terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, "module" and "processor" may include hardware, software, or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, and memory, and may also include software parts, such as program code, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware, or a combination of the two. Computer-readable storage media include any suitable medium that can store program code, such as a disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, and the like.

[0030] In addition, if the meaning of "and / or" appears in this application, it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "one" and "this" can also include plural forms.

[0031] With the popularization of wind turbines, the problem of dynamic stall in wind turbine blades has become increasingly prominent. Specifically, when the blades are in an operating condition with a large angle of attack (such as an angle of attack greater than 20 degrees), flow separation will occur at their trailing edges. The hallmark features are the generation, convection and shedding of stall separation vortices, and the aerodynamic force exhibits obvious nonlinear hysteresis characteristics, with a sudden increase in resistance and fluctuations in the position of the aerodynamic center, which ultimately leads to a reduction in wind energy utilization, seriously affecting the fatigue life of the blade structure, and even causing damage to the blade structure under some operating conditions, causing huge safety hazards and economic losses. In response to the above problems, the present application provides a device and method for dynamic stall adjustment of wind turbine blades.

[0032] See attached Figure 1 , Figure 1 is a schematic diagram of an airfoil in the related art, such as Figure 1 As shown, in aerodynamics, an airfoil is usually understood as a two-dimensional wing. An airfoil (also called an airfoil section) refers to the cross-section of a wind turbine blade. The leading edge of the airfoil refers to the frontmost point of the airfoil, and the trailing edge of the airfoil refers to the rearmost point of the airfoil. The straight line connecting the leading edge and the trailing edge is the chord (also called the chord). The surface of the blade can be the windward side and / or the leeward side, wherein the windward side is the side of the blade that directly faces the wind when rotating, and the leeward side is the side of the blade that faces away from the wind.

[0033] Figure 2 Schematic diagram of a wind turbine blade dynamic stall adjustment device according to an embodiment of the present application. Figure 2 As shown, the device mainly includes: a first airflow controller and a second airflow controller, which are respectively located in a first narrow slot arranged along the span direction of the blade at the leading edge of the blade surface and a second narrow slot arranged along the span direction of the blade at the trailing edge, wherein, when the wind turbine is in working state, one of the first airflow controller and the second airflow controller blows out gas and the other inhales gas.

[0034] In this embodiment, the gap of the slot is very small, and the internal air flow controller blows out gas or sucks in gas through the slot. When flow separation occurs, the pressure distribution on the blade surface can be changed to improve flow separation by controlling the first air flow controller and the second air flow controller to work: one blows out gas and the other sucks in gas.

[0035] In one embodiment, when the first airflow controller and the second airflow controller are in operation, the speed of one blowing out air and the speed of the other inhaling air may be the same or different.

[0036] It is understandable that the flow separation phenomenon mainly occurs on the leeward side. When the blade surface is selected as the leeward side, the improvement effect on the flow separation phenomenon is better than that on the windward side. The implementation in this application is explained with the blade surface as the leeward side. However, according to specific needs, narrow slots and airflow controllers can also be set on the leeward side and the windward side respectively, and this application does not make specific restrictions on this.

[0037] In one embodiment, the side wall of the narrow slot is perpendicular to the surface of the blade, and the airflow controller is arranged inside the blade to blow out or inhale the gas through the airflow channel connected to the narrow slot.

[0038] In one embodiment, the first air flow controller and the second air flow controller may be communicated through an air flow channel.

[0039] It should be noted that the present embodiment does not impose any specific restrictions on the number or shape of the airflow controllers, and two or more airflow controllers may be provided according to the specific circumstances, as long as the air can be blown out or inhaled evenly from all parts of the narrow slot.

[0040] In the technical solution of the present application, the first slot and the second slot are respectively provided on the leading edge and the trailing edge of the blade surface along the span direction of the blade, and the airflow controller in the slot blows out or inhales the air, so as to achieve the purpose of changing the pressure distribution on the blade surface and thus reducing the generation of the wake vortex, and effectively improve the problem of flow separation at the trailing edge of the blade at a large angle of attack. In addition, the first airflow controller and the second airflow controller are started and stopped synchronously, and one blows out the air and the other inhales the air, so as to achieve the purpose of ensuring the conservation of momentum to improve the running stability of the blade.

[0041] It should be noted that Figure 2 Only a part of the wind turbine blade is intercepted, and the length of the first slot and the second slot is equal to the length of the blade. The airflow controller can be an air pump, blower, fan or other equipment that can generate airflow. The airflow controller can change the direction of the airflow through a rotating mechanism and is powered by a battery inside the wind turbine.

[0042] In one embodiment, the first airflow controller and the second airflow controller can not only blow out gas / inhale gas, but also adjust the speed of blowing out gas / inhale gas. By adjusting the speed of blowing out gas / inhale gas, the flow field distribution of the flow around the blade surface can be changed, the accuracy of adjusting the aerodynamic response of the blade can be improved, and the effect of delaying or inhibiting flow separation can be achieved.

[0043] In one embodiment, when the wind turbine is in operation, a speed at which one of the first airflow controller and the second airflow controller blow out air is the same as a speed at which the other one sucks in air.

[0044] In one embodiment, the opening area of ​​the first slot is the same as the opening area of ​​the second slot.

[0045] In this embodiment, the opening area of ​​the first slot is the same as the opening area of ​​the second slot, and the speed of the blown-out gas is the same as the speed of the inhaled gas, which helps to ensure conservation of momentum and further improve the stability of the blade operation.

[0046] In one embodiment, Figure 3 FIG. 1 is a schematic diagram of a wind turbine blade dynamic stall adjustment device according to another embodiment of the present application. Figure 3 As shown, assuming that the chord length of the blade airfoil is c, the first slot is set at 10%c from the leading edge, with a width of 0.5%c; the second slot is set at 85%c from the leading edge, with a width of 0.5%c. Assuming that the first airflow controller blows out gas, the speed of the blown gas is V, and the angle between the blowing direction and the chord length is θ1; the second airflow controller inhales gas, the speed of the inhaled gas is V', and the angle between the inhalation direction and the chord length is θ2.

[0047] In one embodiment, the first airflow controller and the second airflow controller are started and stopped synchronously, the speed V of the blown air is equal to the speed V' of the inhaled air, and the angle θ1 between the blowing direction and the chord length is equal to the angle θ2 between the inhalation direction and the chord length.

[0048] In this embodiment, the first slot, the first airflow controller disposed in the first slot, the second slot, and the second airflow controller disposed in the second slot are used as a combined blowing and suction mechanism, wherein the gap between the first slot and the second slot is very small, and the total width is 1% of the chord length c, and the effect on the original aerodynamic characteristics of the airfoil can be ignored. It should be noted that the above parameter settings are only used as a reference example, and this embodiment does not limit parameters such as the position or size of the slot.

[0049] In one embodiment, Figure 4The figure is a schematic diagram of the jet of the dynamic stall control device for wind turbine blades according to an embodiment of the present application. The jet is a fluid mechanics phenomenon, which refers to the high-speed airflow ejected backward from the nozzle (blowing port) with a certain pressure difference, and then a low-speed airflow is generated that propels forward along the axis of the nozzle. Figure 4 As shown, Ap1 represents the first airflow controller, V represents the speed of the air blown out by the first airflow controller in the first slot, Ap2 represents the second airflow controller, V' represents the speed of the air sucked in by the second airflow controller in the second slot, and α represents the angle of attack, that is, the angle between the incoming wind and the chord. The strength of the jet generated by the blown gas can be expressed by the momentum coefficient C as follows μ To describe:

[0050]

[0051] Among them, C μ Indicates the strength of the jet, i.e. the momentum coefficient, represents the mass flow rate of the blown gas, V represents the velocity of the blown gas, and ρ ∞ Indicates the density of the incoming wind, V ∞ represents the speed of the incoming wind, and S represents the opening area of ​​the blown gas, that is, the opening area of ​​the first slot / the second slot. It should be noted that other parameters except V on the right side of the above formula are all values ​​that can be determined by measurement, calculation, etc.

[0052] In this embodiment, the velocity V of the blown gas can be automatically controlled by calculating the momentum coefficient to quantitatively adjust the blades of the wind turbine generator.

[0053] See attached Figure 5 , Figure 5 1 is a schematic flow chart of the main steps of a method for adjusting a wind turbine blade dynamic stall according to an embodiment of the present application. The method utilizes the wind turbine blade dynamic stall adjustment device in the first aspect or any corresponding technical solution thereof, and mainly includes the following steps S501 and S502:

[0054] Step S501, obtaining the aerodynamic response of the blade and the corresponding stability value, wherein the aerodynamic response of the blade is used to describe the force condition of the blade, and the stability value represents the aerodynamic response value of the blade when the blade is in stable operation.

[0055] In this embodiment, the aerodynamic response of the blade includes the lift coefficient and the drag coefficient, which can be obtained through experiments, numerical simulation or empirical models. The stable value corresponding to the aerodynamic response of the blade can be selected according to the specific situation, such as using the mean value of the aerodynamic response.

[0056] Step S502 , minimizing the deviation between the blade aerodynamic response and the stable value is taken as the optimization target, and one of the first airflow controller and the second airflow controller is controlled to blow out air and the other to inhale air.

[0057] In this embodiment, the lift coefficient is used as the aerodynamic response of the blade, and the corresponding stable value is the mean value of the lift coefficient. When the stall separation phenomenon occurs, the lift coefficient fluctuates relative to the mean value of the lift coefficient. Therefore, in order to achieve blade stability, it is necessary to minimize the deviation between the aerodynamic response of the blade and the stable value.

[0058] In one embodiment, minimizing the deviation between the blade aerodynamic response and the stable value can be achieved by using a closed-loop feedback control method, an optimization algorithm, etc.

[0059] In one embodiment, when the difference between the lift coefficient and the mean value of the lift coefficient is greater than zero, the first airflow controller is controlled to blow out gas and the second airflow controller is controlled to inhale gas, so as to achieve the purpose of lowering the lift coefficient and making it tend to the mean; when the difference between the lift coefficient and the mean value of the lift coefficient is less than zero, the lift coefficient can be increased and made to tend to the mean by controlling the first airflow controller to inhale gas and the second airflow controller to blow out gas.

[0060] In an optional implementation, the above step S502 may further include the following steps S5021 to S5023:

[0061] Step S5021, calculating the momentum coefficient according to the deviation between the aerodynamic response of the blade and the stable value, the momentum coefficient is used to indicate the strength of the jet generated by the blown gas.

[0062] In this embodiment, assuming that the aerodynamic response of the blade includes the lift coefficient and the drag coefficient, and the corresponding stable values ​​include the lift coefficient stable value and the drag coefficient stable value, then the momentum coefficient C μ The following formula can be used for calculation:

[0063] C μ =β1(C L -C L0 )+β2(C D -C D0 )

[0064] In the formula, β1 and β2 are empirical parameters, C L is the lift coefficient, C L0 Indicates the stable value of lift coefficient, C D represents the drag coefficient, C D0 It should be noted that the parameters on the right side of the above formula are all values ​​that can be determined by experiments, numerical simulations or empirical models.

[0065] Step S5022, calculating the speed of the blown gas according to the momentum coefficient.

[0066] In this embodiment, during the separation flow of the blades, the closed-loop feedback control method is used to adjust the strength of the jet of the combined blowing and suction mechanism, so as to achieve the purpose of reducing the stall separation phenomenon and inhibiting the separation flow of the wind turbine blades. Specifically, the velocity V of the blown gas is calculated according to the following formula:

[0067]

[0068] Among them, C μ represents the momentum coefficient, represents the mass flow rate of the blown gas, ρ ∞ Indicates the density of the incoming wind, V ∞ It represents the speed of the incoming air flow, and S represents the opening area for blowing out the gas.

[0069] Step S5023, based on the calculated speed, the first airflow controller is controlled to blow out air, and the second airflow controller is controlled to inhale air.

[0070] In this embodiment, the speed V of the blown gas calculated in step S5022 is obtained, and the first airflow controller is controlled to blow out the gas at the speed V, and the second airflow controller is controlled to inhale the gas at the speed V.

[0071] It should be noted that when the calculated speed V is greater than zero, the first airflow controller blows out gas and the second airflow controller inhales gas; when the calculated speed V is less than zero, the first airflow controller inhales gas and the second airflow controller blows out gas; when the calculated speed V is equal to zero, the first airflow controller and the second airflow controller stop working (no adjustment is required at this time).

[0072] In one embodiment, after the above step S5023, the aerodynamic response of the blade at the next moment can also be collected, and it and the corresponding stable value are used as feedback signals to calculate the speed V at the next moment, and automatic control of the wind turbine blades can be achieved through continuous updating and iteration.

[0073] In the technical solution of the present application, the speed and direction of blowing and suction are adjusted to control the boundary layer flow on the blade surface, thereby delaying or suppressing flow separation, improving the aerodynamic efficiency of the blades and increasing their life cycle, thereby achieving the effect of reducing the safety hazards and economic losses of wind turbine blades.

[0074] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effect of the present application, different steps do not have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders. These adjusted schemes are equivalent to the technical schemes described in this application, and therefore will also fall within the scope of protection of this application.

[0075] It is understood by those skilled in the art that all or part of the processes in the method for implementing the above-mentioned embodiment of the present application can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code.

[0076] Another aspect of the present application also provides a computer-readable storage medium.

[0077] In an embodiment of a computer-readable storage medium according to the present application, the computer-readable storage medium may be configured to store a program for executing the method described in any of the above embodiments, and the program may be loaded and run by a processor to implement the above-mentioned method for adjusting the dynamic stall of a wind turbine blade. For ease of explanation, only the parts related to the embodiments of the present application are shown. For specific technical details not disclosed, please refer to the method part of the embodiments of the present application. The computer-readable storage medium may be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiments of the present application is a non-temporary computer-readable storage medium.

[0078] Another aspect of the present application also provides a smart device.

[0079] In an embodiment of an intelligent device according to the present application, the intelligent device may include at least one processor; and a memory connected to the at least one processor in communication; wherein a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the method described in any of the above embodiments is implemented. Figure 6 , Figure 6 FIG. 4 exemplarily shows that the memory 11 and the processor 12 are communicatively connected via a bus.

[0080] In some embodiments of the present application, the smart device may further include at least one sensor for sensing information. The sensor is communicatively connected to any type of processor mentioned in the present application. Optionally, the smart device described in the present application may be, but is not limited to, a mobile phone, a tablet computer, a desktop, a laptop, a handheld computer, a notebook computer, and the like.

[0081] Another aspect of the present application also provides a wind turbine system, comprising: the smart device described in the third aspect above; and a wind turbine, comprising blades and the device in the first aspect or any corresponding technical solution thereof; wherein the smart device is communicatively connected to the device.

[0082] In this embodiment, the above-mentioned dynamic stall adjustment method for wind turbine blades is executed by an intelligent device, and communicates with the first airflow controller and the second airflow controller of the dynamic stall adjustment device for wind turbine blades, and sends the calculation results of the control method (such as the calculated speed of the blown gas) to the first airflow controller and the second airflow controller, thereby achieving the purpose of controlling one of the first airflow controller and the second airflow controller to blow out gas and the other to inhale gas based on the speed.

[0083] So far, the technical solution of the present application has been described in conjunction with an embodiment shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A wind turbine blade dynamic stall adjustment device, characterized in that: include: The first airflow controller and the second airflow controller are respectively located in a first slot arranged along the blade span direction at the leading edge of the blade surface and in a second slot arranged along the blade span direction at the trailing edge, Wherein, when the wind turbine is in working state, one of the first airflow controller and the second airflow controller blows out air, and the other inhales air.

2. The device according to claim 1, characterized in that When the wind turbine is in operation, a speed at which one of the first airflow controller and the second airflow controller blow out air is the same as a speed at which the other one sucks in air.

3. The device according to claim 1 or 2, characterized in that: The first air flow controller and the second air flow controller are any one of an air pump, a blower and a fan.

4. A method for dynamic stall adjustment of wind turbine blades using the device according to any one of claims 1 to 3, characterized in that: The method comprises: Acquire the aerodynamic response of the blade and the corresponding stability value, wherein the aerodynamic response of the blade is used to describe the force condition of the blade, and the stability value represents the aerodynamic response value of the blade when the blade is in stable operation; Taking minimizing the deviation between the aerodynamic response of the blade and the stable value as the optimization target, one of the first airflow controller and the second airflow controller is controlled to blow out air, while the other one is controlled to inhale air.

5. The method according to claim 4, characterized in that The minimization of the deviation between the blade aerodynamic response and the stable value is taken as an optimization target, and one of the first airflow controller and the second airflow controller is controlled to blow out gas and the other to inhale gas, including: Calculating a momentum coefficient according to a deviation between the aerodynamic response of the blade and the stable value, wherein the momentum coefficient is used to indicate the strength of a jet generated by the blown gas; Calculating the velocity of the blown gas according to the momentum coefficient; Based on the calculated speed, the first air flow controller is controlled to blow out air, and the second air flow controller is controlled to inhale air.

6. The method according to claim 5, characterized in that The step of calculating the speed of the blown gas according to the momentum coefficient comprises: The velocity V of the blown gas is calculated using the following formula: Among them, C μ represents the momentum coefficient, represents the mass flow rate of the blown gas, ρ ∞ Indicates the density of the incoming wind, V ∞ It represents the speed of the incoming air flow, and S represents the opening area for blowing out the gas.

7. The method according to claim 5, characterized in that The method of controlling the first air flow controller to blow out air and the second air flow controller to inhale air based on the calculated speed includes: When the calculated speed is greater than zero, the first air flow controller blows out air and the second air flow controller inhales air; When the calculated speed is less than zero, the first air flow controller inhales air and the second air flow controller blows out air.

8. A smart device, characterized in that: include: at least one processor; as well as a memory communicatively coupled to the at least one processor; The memory stores a computer program, and when the computer program is executed by the at least one processor, the method according to any one of claims 4 to 7 is implemented.

9. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and executed by a processor to perform the method according to any one of claims 4 to 7.

10. A wind turbine system, characterized in that: include: The smart device according to claim 8; as well as A wind turbine, comprising a blade and a device as claimed in any one of claims 1 to 3; Wherein, the smart device is communicatively connected with the apparatus.

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