Wind power blade flutter control method and device based on synthetic jet and medium

Abstract

The invention relates to the technical field of wind power generation, particularly provides a wind power blade flutter control method and device based on synthetic jet and a medium, and aims to solve the technical problem of stall flutter of blades. In order to achieve the purpose, the wind power blade flutter control method based on the synthetic jet comprises the steps that a synthetic jet device is arranged at the preset position of a wind power blade; acquiring a first control parameter of the synthetic jet device; and performing flutter control on the wind power blade according to the first control parameter. Therefore, the flow characteristic of the fluid is improved through the flow control of the synthetic jet, so that the flutter of the blade is effectively inhibited, and the service life of the blade is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and specifically provides a method, a device and a medium for controlling flutter of wind power blades based on synthetic jets. Background Art

[0002] As wind turbines develop towards larger sizes, the aspect ratio of blades increases rapidly, and the structural flexibility also increases. During blade design and operation, when the blades are operating at large angles of attack, flow separation is likely to occur at their trailing edges, making the stall flutter problem more prominent. This not only seriously shortens the life of wind turbine blades, but may even cause structural damage under certain conditions, resulting in serious safety risks and economic losses.

[0003] Therefore, how to solve the stall flutter of blades becomes extremely important. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present application is proposed to provide a solution or at least partially solve the technical problem that when the blade is under high angle of attack, the trailing edge of the blade is prone to flow separation, which causes the blade stall flutter to become more prominent. The present application provides a wind turbine blade flutter control method, device and medium based on synthetic jet.

[0005] In a first aspect, the present application provides a method for controlling wind turbine blade flutter based on synthetic jets, the method comprising:

[0006] Arranging a synthetic jet device at a preset position of the wind turbine blade;

[0007] Acquiring a first control parameter of the synthetic jet device;

[0008] The wind turbine blade is subjected to flutter control according to the first control parameter.

[0009] In one embodiment of the present application, under a first preset working condition, the first control parameters of the synthetic jet device include a first jet frequency, a first jet velocity, and a first jet angle;

[0010] The flutter control of the wind turbine blade according to the first control parameter includes:

[0011] obtaining an oscillation model of a synthetic jet device;

[0012] The first control parameter is input into the oscillation model to achieve blade flutter control under the first preset operating condition.

[0013] In one embodiment of the present application, the expression of the oscillation model of the synthetic jet device is: U jet =Umax ×sin(2πft)·d

[0014] Among them, U jet is the instantaneous oscillation speed of the synthetic jet, U max is the first jet velocity, f is the first jet frequency, d is the jet velocity direction vector of the synthetic jet device, the angle between d and the tangent direction of the airfoil is represented by θ, and θ is the first jet angle.

[0015] In one embodiment of the present application, under the second preset working condition, obtaining the first control parameter of the synthetic jet device includes:

[0016] Acquiring a vibration signal of the tail of the airfoil of the wind turbine blade;

[0017] Perform spectrum analysis on the vibration signal of the tail of the airfoil to obtain the blade flutter characteristics;

[0018] Determining whether blade flutter occurs in the wind turbine blade according to the blade flutter characteristics;

[0019] When the blade flutters, a first control parameter is acquired according to the flutter characteristics of the blade.

[0020] In one embodiment of the present application, the blade flutter characteristics include blade amplitude and vibration frequency;

[0021] Determining whether the wind turbine blade flutters according to the blade flutter characteristics includes: determining that the blade flutters when the blade amplitude is within a preset threshold or the vibration frequency is within a preset threshold interval.

[0022] In one embodiment of the present application, the obtaining of the first control parameter includes: when the blade amplitude is greater than a preset threshold, using the second jet velocity as the first control parameter; when the vibration frequency is within a preset threshold range, using the second jet frequency as the first control parameter;

[0023] The flutter control of the wind turbine blade according to the first control parameter includes: when the blade amplitude is used as the first control parameter, adjusting the second jet velocity; when the vibration frequency is used as the first control parameter, adjusting the second jet frequency.

[0024] In one embodiment of the present application, the method also includes: optimizing the second control parameter based on the first control parameter, wherein, when the second jet velocity is used as the first control parameter, the second control parameter includes a second jet frequency and a second jet angle; when the second jet frequency is used as the first control parameter, the second control parameter includes a second jet velocity and a second jet angle.

[0025] In one embodiment of the present application, the synthetic jet device is set at a preset position of the wind turbine blade, including: embedding the synthetic jet device at a position away from the leading edge or trailing edge of the airfoil surface of the wind turbine blade, and the nozzle of the synthetic jet device is flush with the airfoil surface of the wind turbine blade.

[0026] In a second aspect, an electronic device is provided, comprising:

[0027] at least one processor;

[0028] and, a memory communicatively coupled to the at least one processor;

[0029] Wherein, a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the aforementioned wind turbine blade flutter control method based on synthetic jets is implemented.

[0030] In a third 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 any of the aforementioned synthetic jet-based wind turbine blade flutter control methods.

[0031] The above one or more technical solutions of this application have at least one or more of the following Beneficial effects:

[0032] The synthetic jet-based wind turbine blade flutter control method provided in the present application includes: setting a synthetic jet device at a preset position of a wind turbine blade; obtaining a first control parameter of the synthetic jet device; and controlling the flutter of the wind turbine blade according to the first control parameter. In this way, the flow characteristics of the fluid are improved by flow control of the synthetic jet, so as to effectively suppress the flutter of the blade, thereby increasing the service life of the blade and reducing safety hazards and economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The disclosure of the present application will become more easily understood 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. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0034] Figure 1 It is a schematic diagram of the main process of a wind turbine blade flutter control method based on synthetic jets in one embodiment of the present application;

[0035] Figure 2 is a schematic diagram of the structure of a synthetic jet device in one embodiment of the present application;

[0036] Figure 3is a schematic diagram of the arrangement of a synthetic jet device on an airfoil of a blade in one embodiment of the present application;

[0037] Figure 4 is a schematic diagram of an analysis of a synthetic jet device in one embodiment of the present application;

[0038] Figure 5 It is a schematic diagram of a flow chart of wind turbine blade flutter control under a second preset working condition in one embodiment of the present application;

[0039] Figure 6 It is a schematic diagram of the main structure of a wind turbine blade flutter control device based on synthetic jets in one embodiment of the present application;

[0040] Figure 7 It is a schematic diagram of the structure of an electronic device in one embodiment of the present application. DETAILED DESCRIPTION

[0041] 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.

[0042] In the description of the present application, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, 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. Non-temporary 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, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or A and B. 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 may include only A, only B or A and B. The singular terms "one" and "the" may also include plural forms.

[0043] At present, in the traditional blade design and operation process, when the blade is under high angle of attack operation, flow separation is prone to occur at its trailing edge, making the stall flutter problem more prominent. Synthetic jet technology has become an emerging flow control method because it does not require the introduction of additional flow devices and can accurately change the aerodynamic characteristics by adjusting the parameters of the jet. Synthetic jet is a net massless flow jet generated by periodic oscillations, and its flow characteristics can be flexibly adjusted by parameters such as frequency, amplitude and phase. By utilizing the interaction between the jet and the mainstream, the aerodynamic pressure distribution on the blade surface is effectively changed, thereby reducing the coupling between the aerodynamic load and the structural vibration, thereby achieving the effect of suppressing blade flutter.

[0044] To this end, the present application proposes a wind turbine blade flutter control method, device and medium based on synthetic jets.

[0045] See attached Figure 1 , Figure 1 It is a flowchart of the main steps of a wind turbine blade flutter control method based on synthetic jets according to an embodiment of the present application.

[0046] like Figure 1 As shown, the wind turbine blade flutter control method based on synthetic jets in the embodiment of the present application mainly includes the following steps S10 to S30.

[0047] Step S10: Setting a synthetic jet device at a preset position of a wind turbine blade.

[0048] Step S20: Acquire a first control parameter of the synthetic jet device.

[0049] Step S30: performing flutter control on the wind turbine blade according to the first control parameter.

[0050] Based on the above steps S10 to S30, a synthetic jet device is firstly set at a preset position of a wind turbine blade; a first control parameter of the synthetic jet device is obtained; and flutter control of the wind turbine blade is performed according to the first control parameter. In this way, the flow characteristics of the fluid are improved by flow control of the synthetic jet, so as to effectively suppress blade flutter, thereby increasing the service life of the blade and reducing safety hazards and economic losses.

[0051] The above steps S10 to S30 are further explained below.

[0052] Before describing step S10, the specific structure of the synthetic jet device will be described in detail.

[0053] Specific as Figure 2As shown, the synthetic jet device in the present application is composed of a cavity, an actuator and a nozzle, wherein the actuator is a metal film of piezoelectric material, and the vibration of the metal film causes the periodic discharge and suction of the fluid in the cavity, thereby forming a periodic synthetic jet without net mass flow at the nozzle. The jet frequency is controlled by the frequency of the applied voltage, and the jet amplitude is determined by the magnitude of the voltage. The cavity is a closed structure, and its volume matches the vibration frequency of the metal film to ensure the resonance effect of the fluid in the cavity, so as to maximize the jet output. The nozzle is an arc-shaped structure, which facilitates the smooth fusion of the jet and the mainstream airflow, thereby reducing energy loss and improving the flow control effect. It can also effectively reduce the flow resistance at the nozzle and improve the overall aerodynamic performance of the device.

[0054] In a specific embodiment of the present application, the synthetic jet device is set at a preset position of the wind turbine blade, including: embedding the synthetic jet device at a position away from the leading edge or trailing edge of the airfoil surface of the wind turbine blade, and the nozzle of the synthetic jet device is flush with the airfoil surface of the wind turbine blade.

[0055] Specifically, the synthetic jet device can be placed in areas where the aerodynamic pressure gradient is significant or flow separation is likely to occur, such as near the leading edge or trailing edge of the airfoil surface, to maximize the control of blade flutter suppression. In detail, the synthetic jet device can be embedded in a layout and the direction of the synthetic jet device can be adjusted. The nozzle is flush with the wall of the blade airfoil, and a micro servo motor is embedded inside the nozzle, and the nozzle direction adjustment is achieved through a hinge structure. For example, Figure 3 It can be used as a schematic diagram of the arrangement of the synthetic jet device on the airfoil of the blade, wherein U is the incoming flow velocity, C is the chord length of the airfoil, and θ represents the angle between the jet direction and the upper surface of the airfoil.

[0056] In addition, the synthetic jet device is arranged on the airfoil of the blade. At this time, the synthetic jet device corresponds to a virtual synthetic jet model. The synthetic jet model is based on the fluid body motion characteristics caused by the vibration of the metal film. The movement velocity of the membrane surface is directly used as the boundary condition of the body-contacting fluid region to describe the dynamic coupling characteristics between the vibrating membrane and the body-contacting fluid. By using the velocity distribution of the metal film as the initial flow condition of the flow field, the synthetic jet model realizes the numerical simulation of the entire flow field of the synthetic jet. Combined with Figure 4 , the velocity distribution expression corresponding to the synthetic jet device is as follows: u1(l,t)≈0

[0057] Among them, A is the amplitude of the piezoelectric film, f is the vibration frequency, Φ0 is the initial phase, u x(l,t) and u1(l,t) are the axial and radial components of the velocity at any point (x1,l) on the surface of the metal film, respectively. x and x1 are the axial displacements of the film. l and Δl are the radius vectors from any point on the surface of the vibrating film to the center axis of the vibrating film and their changes, respectively. R0 is the radius of curvature.

[0058] The following is a detailed description of the flutter control of wind turbine blades in simulation conditions and actual application conditions by way of embodiments, wherein fixed conditions refer to working conditions that are set and kept constant during the experiment or simulation process, including wind speed, angle, pressure, etc., which are usually used to study the performance of the system under specific conditions. The actual changing conditions refer to the fact that in actual applications, the working conditions of the wind turbine will change with environmental changes (such as wind speed, climate, etc.), so the control system must be able to make adaptive adjustments according to the real-time changing working conditions. Embodiment 1

[0059] Under the preset fixed working conditions, the influence of the jet frequency (f), jet velocity (U) and jet angle (θ) of the synthetic jet on the aerodynamic performance of the airfoil is studied by combining orthogonal experimental design with numerical simulation, so as to obtain the optimal jet frequency (f), optimal jet velocity (U) and optimal jet angle (θ), and obtain the first control parameter of the jet device. Specifically, the jet frequency f and jet velocity U are fixed first, and the airfoil is numerically simulated for different jet angles θ, and the average values ​​of the airfoil lift coefficient and lift-to-drag ratio are compared to determine the optimal angle θ. j Then, the optimal jet frequency f is determined in turn according to the above method. j With jet velocity U j .

[0060] Exemplarily, different parameters of the jet (jet frequency, jet velocity and jet angle) are regarded as independent variables through orthogonal experimental design, and different levels are set for each variable (for example, the frequency has several different values, and the velocity and angle are also set at multiple levels). Through orthogonal design, the number of experiments can be reduced. According to the results of the orthogonal experiment, the influence of each factor on the aerodynamic performance index can be calculated, and the range analysis can help determine which parameters have the greatest impact on the performance and which have a smaller contribution to the performance. Then, under each set of experimental conditions, numerical simulation (such as CFD) is used to evaluate the aerodynamic effect of the synthetic jet. For each combination, the lift coefficient (Cl), drag coefficient (Cd) and lift-to-drag ratio (Cl / Cd) of the airfoil under different conditions can be obtained through simulation, and the lift coefficient and lift-to-drag ratio of different jet angles are compared to find the jet angle that optimizes the aerodynamic performance. After determining the optimal jet angle, the optimal jet frequency and jet velocity are determined in turn in a similar manner.

[0061] In a specific embodiment of the present application, under a first preset operating condition, the first control parameters of the synthetic jet device include a first jet frequency, a first jet velocity and a first jet angle; the flutter control of the wind turbine blade according to the first control parameters includes: obtaining an oscillation model of the synthetic jet device; inputting the first control parameter into the oscillation model to achieve blade flutter control under the first preset operating condition.

[0062] In a specific embodiment of the present application, the expression of the oscillation model of the synthetic jet device is: U ject =U max ×sin(2πft)·d

[0063] Among them, U jet is the instantaneous oscillation speed of the synthetic jet, U max is the first jet velocity, f is the first jet frequency, d is the jet velocity direction vector of the synthetic jet device, the angle between d and the tangent direction of the airfoil is represented by θ, and θ is the first jet angle.

[0064] Specifically, the optimal jet angle θ is obtained through orthogonal experiments. j , the optimal jet frequency f j With the jet velocity U j Then, the optimal jet angle θ j , the optimal jet frequency f j With the jet velocity U j The oscillation model of the synthetic jet device is input to control the oscillation of the synthetic jet device, thereby helping to reduce blade vibration and stabilize aerodynamic loads, thereby suppressing blade flutter. The flutter of the blade is actively suppressed through periodically changing jets, ensuring the safe and efficient operation of wind turbine blades. Embodiment 2

[0065] According to the actual changing working conditions, the initial suppression of blade flutter can also be achieved by controlling the first control parameter of the synthetic jet device.

[0066] In a specific embodiment of the present application, in actual working conditions, obtaining the first control parameter of the synthetic jet device includes: obtaining a vibration signal of the tail of the airfoil of the wind turbine blade; performing spectral analysis on the vibration signal of the tail of the airfoil to obtain blade flutter characteristics; determining whether blade flutter occurs in the wind turbine blade based on the blade flutter characteristics; and when the blade flutters, obtaining the first control parameter based on the blade flutter characteristics.

[0067] Specifically, an acceleration sensor can be installed at the tail of the airfoil to collect the vibration signal of the blade. The vibration frequency can be obtained by spectrum analysis of the vibration signal, and the blade amplitude can be obtained by double integration of the vibration signal. Further, it is determined whether flutter occurs based on the blade amplitude and vibration frequency. When it is determined that flutter occurs, the synthetic jet device is started to achieve flutter suppression.

[0068] In a specific embodiment of the present application, the blade flutter characteristics include blade amplitude and vibration frequency; determining whether blade flutter occurs according to the blade flutter characteristics includes: when the blade amplitude is greater than a preset threshold or the vibration frequency is within a preset threshold range, determining that the blade flutters.

[0069] The preset threshold value and the preset threshold value interval may be a numerical value or a numerical value interval that is preset or obtained through experiments.

[0070] Specifically, when the blade amplitude is greater than a preset threshold or the vibration frequency is close to a preset frequency, it is determined that the blade flutters.

[0071] In a specific embodiment of the present application, the obtaining of the first control parameter includes: when the blade amplitude is greater than a preset threshold value, using the second jet velocity as the first control parameter; when the vibration frequency is within a preset threshold range, using the second jet frequency as the first control parameter; the flutter control of the wind turbine blade according to the first control parameter includes: when the blade amplitude is used as the first control parameter, adjusting the second jet velocity; when the vibration frequency is used as the first control parameter, adjusting the second jet frequency.

[0072] Specifically, when the blade amplitude is greater than the preset threshold, the jet velocity (second jet velocity) is used as the initial control parameter, that is, the first control parameter; when the vibration frequency is within the preset threshold interval, the jet frequency (second jet frequency) is used as the initial control parameter, that is, the first control parameter. Specifically, for flutter with a large amplitude, the control strategy of increasing the jet velocity is preferentially adopted to quickly reduce the vibration energy; and for the frequency locking phenomenon (the frequency is locked at a specific value), the jet frequency is preferentially adjusted to break the resonant coupling state, so that the aerodynamic force is stabilized, thereby suppressing the blade flutter.

[0073] In a specific embodiment of the present application, the method also includes: optimizing the second control parameter based on the first control parameter, wherein, when the second jet velocity is used as the first control parameter, the second control parameter includes a second jet frequency and a second jet angle; when the second jet frequency is used as the first control parameter, the second control parameter includes a second jet velocity and a second jet angle.

[0074] Specifically, when the first control parameter is the second jet velocity, the second jet frequency and the second jet angle can also be optimized and adjusted. When the first control parameter is the second jet frequency, the second jet velocity and the second jet angle can also be optimized and adjusted, so as to more comprehensively suppress the blade flutter and improve the stability and efficiency of the fan. It should be noted that the jet angle can be adjusted by changing the direction of the nozzle; since the vibration of the metal film will cause the periodic discharge and suction of the fluid in the cavity, thereby affecting the speed of the jet, the jet speed can be adjusted by changing the vibration amplitude of the metal film of the synthetic jet device; the jet frequency of the synthetic jet is controlled by the frequency of the voltage applied to the metal film, so the jet can be generated at a corresponding frequency by adjusting the frequency of the voltage.

[0075] Specifically, by applying a fast response control algorithm (such as an adaptive control algorithm), key control variables such as jet angle, frequency and speed are finely adjusted in real time. For example, if the jet frequency has been preliminarily adjusted, the jet frequency is a key parameter related to the vibration mode in the control system. After adjustment, the frequency response change of the vibration can be observed. If the amplitude of the vibration becomes smaller, the aerodynamic pressure distribution can be further optimized by adjusting the jet angle to balance the aerodynamic performance and the flow field structure on the blade surface; if the vibration is still large, the jet speed can be further optimized.

[0076] If the jet velocity has been preliminarily adjusted, the jet velocity affects the strength of the airflow. If the velocity has been adjusted and some effects have been achieved, but the flow on the blade surface is unstable or the aerodynamic performance is still not ideal, the flow distribution can be optimized by adjusting the jet angle. The adjustment of the jet angle helps to change the interaction between the jet and the mainstream, which is critical to the impact on the aerodynamic load.

[0077] If the jet angle has been preliminarily adjusted, the adjustment of the jet angle mainly affects the interaction between the jet and the flow on the blade surface. If there is still a vibration problem after the adjustment, the frequency and speed can be fine-tuned for fine control. Adjusting the frequency can help better match the vibration characteristics of the blade, and adjusting the speed can help strengthen or weaken the aerodynamic control effect. During the entire optimization process, the global optimal control of the flow field is achieved through the dynamic adjustment and feedback closed-loop response of multivariable collaborative control, achieving the optimal vibration suppression effect.

[0078] Figure 5 It can be used as a flow chart of wind turbine blade flutter control under the second preset working condition, such as Figure 5 As shown, the flutter control of wind turbine blades under the second preset working condition can be achieved through the following steps S201 to S206.

[0079] Step S201: receiving a vibration signal of the tail of the airfoil fed back by a sensor.

[0080] Step S202: performing spectrum analysis on the vibration signal of the tail of the airfoil to obtain blade amplitude and vibration frequency.

[0081] Step S203: Compare the blade amplitude and vibration frequency with preset thresholds respectively to determine a priority control variable (first control parameter).

[0082] Step S204: Adjust the priority control variable.

[0083] Step S205: Determine whether the target control result is achieved for the priority control variable. If so, execute the following step S205; otherwise, return to step S204.

[0084] Step S206: After the priority control variable is adjusted, the remaining control variables are further adjusted to achieve optimal control.

[0085] 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 changes are within the scope of protection of the present application.

[0086] Furthermore, the present application also provides a wind turbine blade flutter control device based on synthetic jets.

[0087] See attached Figure 6 , Figure 6 It is a main structural block diagram of a wind turbine blade flutter control device based on synthetic jets according to an embodiment of the present application.

[0088] like Figure 6 As shown, the wind turbine blade flutter control device based on synthetic jet in the embodiment of the present application mainly includes a setting module 11, an acquisition module 12 and a control module 13. In some embodiments, one or more of the setting module 11, the acquisition module 12 and the control module 13 can be combined into one module.

[0089] In some embodiments, the setting module 11 may be configured to set a synthetic jet device at a preset position of the wind turbine blade.

[0090] The acquisition module 12 may be configured to acquire a first control parameter of the synthetic jet device.

[0091] The control module 13 may be configured to perform flutter control on the wind turbine blade according to the first control parameter.

[0092] In one implementation, the description of the specific implementation functions can refer to steps S10-S30.

[0093] The wind turbine blade flutter control device based on synthetic jet is used to perform Figure 1 The embodiment of the flutter control method for wind turbine blades based on synthetic jets shown in the figure are similar in technical principles, technical problems solved and technical effects produced. Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process and related instructions of the flutter control device for wind turbine blades based on synthetic jets can refer to the contents described in the embodiment of the flutter control method for wind turbine blades based on synthetic jets, and will not be repeated here.

[0094] Further, it should be understood that since the setting of each module is only for illustrating the functional units of the device of the present application, the physical devices corresponding to these modules may be the processor itself, or a part of the software in the processor, a part of the hardware, or a part of the combination of software and hardware. Therefore, the number of each module in the figure is only schematic.

[0095] It is understood by those skilled in the art that each module in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principle of the present application, and therefore, the technical solutions after splitting or merging will fall within the protection scope of the present application.

[0096] 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.

[0097] Furthermore, the present application also provides an electronic device, which may include at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores a computer program, and when the computer program is executed by the at least one processor, the wind turbine blade flutter control method based on synthetic jet described in any of the above embodiments is implemented. Figure 7 As shown, Figure 7exemplarily shows the structure of an electronic device, which includes a processor 100 and a memory 200.

[0098] Furthermore, the present application also provides a computer-readable storage medium. In a computer-readable storage medium embodiment according to the present application, the computer-readable storage medium can be configured to store a program for executing the synthetic jet-based wind turbine blade flutter control method of the above-mentioned method embodiment, and the program can be loaded and run by the processor to implement the above-mentioned synthetic jet-based wind turbine blade flutter control method. For ease of explanation, only the parts related to the embodiment of the present application are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present application. The computer-readable storage medium can be a memory device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present application is a non-temporary computer-readable storage medium.

[0099] So far, the technical solutions of the present application have been described in conjunction with the specific implementations 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 implementations. 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 flutter control method based on synthetic jet, characterized in that: The method comprises: Arranging a synthetic jet device at a preset position of the wind turbine blade; Acquiring a first control parameter of the synthetic jet device; The wind turbine blade is subjected to flutter control according to the first control parameter.

2. The wind turbine blade flutter control method based on synthetic jet according to claim 1, characterized in that: Under the first preset working condition, the first control parameters of the synthetic jet device include a first jet frequency, a first jet velocity and a first jet angle; The flutter control of the wind turbine blade according to the first control parameter includes: obtaining an oscillation model of a synthetic jet device; The first control parameter is input into the oscillation model to achieve blade flutter control under the first preset operating condition.

3. The wind turbine blade flutter control method based on synthetic jet according to claim 2, characterized in that: The expression of the oscillation model of the synthetic jet device is: U jet =U max ×sin(2πft)·d Among them, U jet is the instantaneous oscillation speed of the synthetic jet, U max is the first jet velocity, f is the first jet frequency, t is the time, d is the jet velocity direction vector of the synthetic jet device, the angle between d and the tangent direction of the airfoil is represented by θ, and θ is the first jet angle.

4. The wind turbine blade flutter control method based on synthetic jet according to claim 1, characterized in that: Under the second preset working condition, the obtaining of the first control parameter of the synthetic jet device includes: Acquiring a vibration signal of the tail of the airfoil of the wind turbine blade; Perform spectrum analysis on the vibration signal of the tail of the airfoil to obtain the blade flutter characteristics; Determining whether blade flutter occurs in the wind turbine blade according to the blade flutter characteristics; When the blade flutters, a first control parameter is acquired according to the flutter characteristics of the blade.

5. The wind turbine blade flutter control method based on synthetic jet according to claim 4, characterized in that: The blade flutter characteristics include blade amplitude and vibration frequency; Determining whether the wind turbine blade flutters according to the blade flutter characteristics includes: determining that the blade flutters when the blade amplitude is greater than a preset threshold or the vibration frequency is within a preset threshold range.

6. The method for controlling wind turbine blade flutter based on synthetic jet according to claim 5, characterized in that: The obtaining of the first control parameter includes: when the blade amplitude is greater than a preset threshold, taking the second jet velocity as the first control parameter; when the vibration frequency is within a preset threshold interval, taking the second jet frequency as the first control parameter; The flutter control of the wind turbine blade according to the first control parameter includes: when the blade amplitude is used as the first control parameter, adjusting the second jet velocity; when the vibration frequency is used as the first control parameter, adjusting the second jet frequency.

7. The method for controlling wind turbine blade flutter based on synthetic jet according to claim 6, characterized in that: The method also includes: optimizing a second control parameter based on the first control parameter, wherein, when the second jet velocity is used as the first control parameter, the second control parameter includes a second jet frequency and a second jet angle; when the second jet frequency is used as the first control parameter, the second control parameter includes a second jet velocity and a second jet angle.

8. The method for controlling wind turbine blade flutter based on synthetic jet according to claim 1, characterized in that: The provision of a synthetic jet device at a preset position of the wind turbine blade comprises: embedding the synthetic jet device at a position away from the leading edge or trailing edge of the airfoil surface of the wind turbine blade, wherein the nozzle of the synthetic jet device is flush with the airfoil surface of the wind turbine blade.

9. An electronic device, characterized in that: include: at least one processor; and, a memory communicatively coupled 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 wind turbine blade flutter control method based on synthetic jets as described in any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the wind turbine blade flutter control method based on synthetic jets according to any one of claims 1 to 8.

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