Synthetic jet based flutter control method, apparatus and medium for wind turbine blades

Abstract

The application relates to the technical field of wind power generation, and particularly provides a wind power blade flutter control method based on synthetic jet, equipment and a medium, and aims to solve the technical problem of stall flutter of a blade. For this purpose, the wind power blade flutter control method based on synthetic jet comprises the following steps: a synthetic jet device is arranged at a preset position of a wind power blade; a first control parameter of the synthetic jet device is acquired; and the wind power blade is subjected to flutter control according to the first control parameter. In this way, the flow characteristics of fluid are improved through flow control of the synthetic jet, so that the blade flutter is effectively inhibited, and the service life of the blade is prolonged.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically providing a method, device, and medium for controlling wind turbine blade flutter based on synthetic jet. Background Technology

[0002] As wind turbines become larger, the aspect ratio of blades is rapidly increasing, and structural flexibility is also improving. During blade design and operation, when blades operate at high angles of attack, flow separation can easily occur at their trailing edges, making stall flutter a more prominent issue. This not only severely reduces the lifespan of wind turbine blades but, under certain operating conditions, can even lead to structural damage, resulting in serious safety risks and economic losses.

[0003] Therefore, finding a solution to blade stall flutter becomes extremely important. Summary of the Invention

[0004] To overcome the aforementioned deficiencies, this application is proposed to provide a solution, or at least a partial solution, to the technical problem that flow separation easily occurs at the trailing edge of the blade under high angle-of-attack operating conditions, leading to more pronounced blade stall flutter. This application provides a wind turbine blade flutter control method, device, and medium based on synthetic jet.

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

[0006] A synthetic jet device is installed at a predetermined position on the wind turbine blade;

[0007] Obtain the first control parameters of the synthetic jet device;

[0008] The wind turbine blades are subjected to flutter control based on the first control parameters.

[0009] In one embodiment of this 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;

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

[0011] Obtain the oscillation model of the 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 this application, the expression for the oscillation model of the synthetic jet device is:

[0014] Ujet =U max ×sin(2πft)·d

[0015] Among them, U jet U is the instantaneous oscillation velocity of the synthetic jet. max Let f be the first jet velocity, f be the first jet frequency, d be the jet velocity direction vector of the synthetic jet device, and θ be the angle between d and the airfoil tangent direction, where θ is the first jet angle.

[0016] In one embodiment of this application, under a second preset operating condition, obtaining the first control parameters of the synthetic jet device includes:

[0017] Obtain the vibration signal of the airfoil tail of the wind turbine blade;

[0018] Spectral analysis of vibration signals at the airfoil tail was performed to obtain blade flutter characteristics;

[0019] Determine whether the wind turbine blade is experiencing blade flutter based on the described blade flutter characteristics;

[0020] When the blade flutters, a first control parameter is obtained based on the characteristics of the blade flutter.

[0021] In one embodiment of this application, the blade flutter characteristics include blade amplitude and vibration frequency;

[0022] The step of determining whether the wind turbine blade is fluttering based on the blade flutter characteristics includes: determining that the blade is fluttering when the blade amplitude is within a preset threshold or the vibration frequency is within a preset threshold range.

[0023] In one embodiment of this application, obtaining 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; and when the vibration frequency is within a preset threshold range, using the second jet frequency as the first control parameter.

[0024] The step of controlling the flutter of the wind turbine blade according to the first control parameter includes: adjusting the second jet velocity when the blade amplitude is the first control parameter; and adjusting the second jet frequency when the vibration frequency is the first control parameter.

[0025] In one embodiment of this application, the method further includes: optimizing the second control parameter according to 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.

[0026] In one embodiment of this application, the step of setting a synthetic jet device at a preset position on the wind turbine blade includes: 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.

[0027] In a second aspect, an electronic device is provided, comprising:

[0028] At least one processor;

[0029] And, a memory communicatively connected to the at least one processor;

[0030] The memory stores a computer program, which, when executed by the at least one processor, is the aforementioned wind turbine blade flutter control method based on synthetic jets.

[0031] In a third aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, the program codes being adapted to be loaded and run by a processor to perform the wind turbine blade flutter control method based on synthetic jet as described in any of the preceding claims.

[0032] The above-described technical solutions of this application have at least one or more of the following features.

[0033] Beneficial effects:

[0034] The wind turbine blade flutter control method based on synthetic jet provided in this application includes: setting a synthetic jet device at a preset position on the wind turbine blade; obtaining first control parameters for the synthetic jet device; and controlling the flutter of the wind turbine blade according to the first control parameters. In this way, the flow characteristics of the fluid are improved by controlling the flow of the synthetic jet, thereby effectively suppressing blade flutter, extending the service life of the blade, and reducing safety hazards and economic losses. Attached Figure Description

[0035] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0036] Figure 1 This is a schematic diagram of the main process of a wind turbine blade flutter control method based on synthetic jet in one embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the synthetic jet device in one embodiment of this application;

[0038] Figure 3 This is a schematic diagram of the synthetic jet device arranged on the airfoil of the blade in one embodiment of this application;

[0039] Figure 4 This is an analytical schematic diagram of a synthetic jet apparatus in one embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the process for controlling wind turbine blade flutter under a second preset operating condition in one embodiment of this application;

[0041] Figure 6 This is a schematic diagram of the main structure of a wind turbine blade flutter control device based on synthetic jet in one embodiment of this application;

[0042] Figure 7 This is a schematic diagram of the structure of an electronic device in one embodiment of this application. Detailed Implementation

[0043] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0044] In the description of this application, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and can also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, 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 terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms.

[0045] In traditional blade design and operation, flow separation easily occurs at the trailing edge of blades operating at high angles of attack, exacerbating stall flutter. Synthetic jet technology, which eliminates the need for additional flow control devices and allows for precise modification of aerodynamic characteristics by adjusting jet parameters, has emerged as a new flow control method. Synthetic jets are massless flow jets generated through periodic oscillations, and their flow characteristics can be flexibly adjusted using 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 altered, thereby reducing the coupling between aerodynamic loads and structural vibrations, thus suppressing blade flutter.

[0046] Therefore, this application proposes a method, device and medium for controlling wind turbine blade flutter based on synthetic jet.

[0047] See appendix Figure 1 , Figure 1 This is a schematic flowchart of the main steps of a wind turbine blade flutter control method based on synthetic jet according to an embodiment of this application.

[0048] like Figure 1 As shown, the wind turbine blade flutter control method based on synthetic jet in this application embodiment mainly includes the following steps S10-S30.

[0049] Step S10: Install a synthetic jet device at a preset position on the wind turbine blade.

[0050] Step S20: Obtain the first control parameters of the synthetic jet device.

[0051] Step S30: Perform flutter control on the wind turbine blades according to the first control parameters.

[0052] Based on steps S10-S30 above, a synthetic jet device is first installed at a preset position on the wind turbine blade; first control parameters of the synthetic jet device are obtained; and flutter control of the wind turbine blade is performed according to the first control parameters. In this way, the flow characteristics of the fluid are improved through the flow control of the synthetic jet, thereby effectively suppressing blade flutter, extending the service life of the blade, and reducing safety hazards and economic losses.

[0053] The following provides further explanation of steps S10 to S30.

[0054] Before explaining step S10, the specific structure of the synthetic jet device will be explained in detail.

[0055] Specifically, such as Figure 2As shown, the synthetic jet device in this application consists of a cavity, an actuator, and a nozzle. The actuator contains a thin metal film of piezoelectric material. The vibration of the metal film causes the periodic discharge and intake of fluid within the cavity, thereby forming a periodic synthetic jet with no 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 is matched to the vibration frequency of the metal film to ensure the resonance effect of the fluid within the cavity, thereby maximizing the jet output. The nozzle has an arc-shaped structure, which facilitates the smooth fusion of the jet with the mainstream airflow, thereby reducing energy loss and improving flow control. It also effectively reduces the flow resistance at the nozzle, improving the overall aerodynamic performance of the device.

[0056] In one specific embodiment of this application, the step of setting the synthetic jet device at a preset position on the wind turbine blade includes: 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.

[0057] Specifically, the synthetic jet device can be placed in areas with significant aerodynamic pressure gradients or where flow separation is prone to occur, such as near the leading or trailing edge of the airfoil surface, to maximize the control of blade flutter suppression. More specifically, the synthetic jet device can be embedded in the airfoil and its nozzle direction can be adjustable. The nozzle is flush with the airfoil wall, and a miniature servo motor is embedded inside the nozzle, with the nozzle direction adjusted via a hinge structure. For example, Figure 3 This can serve as a schematic diagram of a synthetic jet device arranged on the airfoil of a blade, where U is the incoming flow velocity, C is the airfoil chord length, and θ represents the angle between the jet direction and the upper surface of the airfoil.

[0058] Furthermore, by arranging the synthetic jet device on the airfoil of the blade, this device corresponds to a virtual synthetic jet model. This model is based on the fluid-body motion characteristics caused by the vibration of a metal thin film, directly using the velocity of the film surface as the boundary condition for the fluid-fit region to describe the dynamic coupling characteristics between the vibrating film and the fluid-fit region. By using the velocity distribution of the metal thin film as the initial inflow condition, the synthetic jet model achieves a full-field numerical simulation of the synthetic jet flow. Combined with… Figure 4 The velocity distribution expression corresponding to the synthetic jet device is as follows:

[0059]

[0060] u1(l,t)≈0

[0061] Where A is the amplitude of the piezoelectric film, f is the vibration frequency, Φ0 is the initial phase, and 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 thin 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 central axis of the vibrating film and their changes, respectively, and R0 is the radius of curvature.

[0062] The following examples illustrate in detail the flutter control of wind turbine blades under simulated and real-world operating conditions. Fixed operating conditions refer to the set and constant working conditions during experiments or simulations. These conditions include wind speed, angle, and pressure, and are typically used to study the system's performance under specific conditions. Actual changing operating conditions, on the other hand, refer to the operating conditions of the wind turbine unit that change with environmental variations (such as wind speed and climate) in real-world applications. Therefore, the control system must be able to adaptively adjust to these real-time changes in operating conditions.

[0063] Example 1

[0064] Under predetermined fixed operating conditions, this study investigates the effects of the jet frequency (f), jet velocity (U), and jet angle (θ) of the synthesized jet on the aerodynamic performance of the airfoil using a combination of orthogonal experimental design and numerical simulation. The aim is to obtain the optimal jet frequency (f), optimal jet velocity (U), and optimal jet angle (θ), thus determining the first control parameters of the jet device. Specifically, the jet frequency f and jet velocity U are first fixed. Numerical simulations are then performed on the airfoil for different jet angles θ. By comparing the average values ​​of the obtained airfoil lift coefficient and lift-to-drag ratio, the optimal angle θ is determined. j Then, following the method described above, the optimal jet frequency f is determined sequentially. j With jet velocity U j .

[0065] For example, orthogonal experimental design treats different jet parameters (jet frequency, jet velocity, and jet angle) as independent variables, setting different levels for each variable (e.g., several different values ​​for frequency, and multiple levels for velocity and angle). Orthogonal design reduces the number of experiments. Based on the results of the orthogonal experiments, the influence of each factor on aerodynamic performance indicators can be calculated. Range analysis can help determine which parameters have the greatest impact on performance and which contribute less. Then, under each set of experimental conditions, numerical simulation (such as CFD) is used to evaluate the aerodynamic effects of the composite jet. For each combination, simulation yields the airfoil lift coefficient (Cl), drag coefficient (Cd), and lift-to-drag ratio (Cl / Cd) under different conditions. By comparing the lift coefficient and lift-to-drag ratio at different jet angles, the optimal jet angle for aerodynamic performance can be found. After determining the optimal jet angle, the optimal jet frequency and jet velocity are determined sequentially using a similar method.

[0066] In one specific embodiment of this 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 step of controlling the flutter of the wind turbine blade according to the first control parameters includes: acquiring an oscillation model of the synthetic jet device; and inputting the first control parameters into the oscillation model to achieve blade flutter control under the first preset operating condition.

[0067] In one specific embodiment of this application, the expression for the oscillation model of the synthetic jet device is:

[0068] U ject =U max ×sin(2πft)·d

[0069] Among them, U jet U is the instantaneous oscillation velocity of the synthetic jet. max Let f be the first jet velocity, f be the first jet frequency, d be the jet velocity direction vector of the synthetic jet device, and θ be the angle between d and the airfoil tangent direction, where θ is the first jet angle.

[0070] Specifically, the optimal jet angle θ is obtained through orthogonal experiments. j Optimal jet frequency f j With jet velocity U j Then, the optimal jet angle θ j Optimal jet frequency f j With 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 load, thus suppressing blade flutter. The periodically changing jet actively suppresses blade flutter, ensuring the safe and efficient operation of wind turbine blades.

[0071] Example 2

[0072] For actual changing operating conditions, the initial suppression of blade flutter can also be achieved by controlling the first control parameter of the synthetic jet device.

[0073] In one specific embodiment of this application, in actual operating conditions, obtaining the first control parameter of the synthetic jet device includes: obtaining the vibration signal of the airfoil tail of the wind turbine blade; performing spectral analysis on the vibration signal of the airfoil tail to obtain blade flutter characteristics; determining whether the wind turbine blade is experiencing blade flutter based on the blade flutter characteristics; and obtaining the first control parameter based on the blade flutter characteristics when the blade is experiencing flutter.

[0074] Specifically, an accelerometer can be installed at the tail of the airfoil to collect the vibration signal of the blade. The vibration frequency can be obtained through spectrum analysis of the vibration signal, and the blade amplitude can be obtained by double integration of the vibration signal. Further, based on the blade amplitude and vibration frequency, it can be determined whether flutter has occurred. When flutter is determined to have occurred, the synthetic jet device is activated to suppress flutter.

[0075] In one specific embodiment of this application, the blade flutter characteristics include blade amplitude and vibration frequency; determining whether the wind turbine blade is experiencing blade flutter based on the blade flutter characteristics includes: determining that the blade is experiencing flutter when the blade amplitude is greater than a preset threshold or the vibration frequency is within a preset threshold range.

[0076] The preset threshold and preset threshold range can be pre-set values ​​or value ranges obtained through experiments.

[0077] 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 is fluttering.

[0078] In one specific embodiment of this application, obtaining 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; and controlling the flutter of the wind turbine blade according to the first control parameter includes: adjusting the second jet velocity when the blade amplitude is used as the first control parameter; and adjusting the second jet frequency when the vibration frequency is used as the first control parameter.

[0079] Specifically, when the blade amplitude exceeds a preset threshold, the jet velocity (second jet velocity) is used as the initial control parameter, i.e., the first control parameter; when the vibration frequency is within the preset threshold range, the jet frequency (second jet frequency) is used as the initial control parameter, i.e., the first control parameter. Specifically, for flutter phenomena with large amplitudes, a control strategy of increasing the jet velocity is prioritized to quickly reduce vibration energy; while for frequency locking (frequency locked at a specific value), the jet frequency is adjusted first to break the resonant coupling state, stabilizing the aerodynamic forces and thus suppressing blade flutter.

[0080] In one specific embodiment of this application, the method further includes: optimizing the second control parameter according to the first control parameter, wherein when the second jet velocity is used as the first control parameter, the second control parameter includes the second jet frequency and the second jet angle; when the second jet frequency is used as the first control parameter, the second control parameter includes the second jet velocity and the second jet angle.

[0081] 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, thereby more comprehensively suppressing blade flutter and improving 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 causes periodic discharge and intake of fluid within the cavity, thus affecting the jet velocity, the jet velocity can be adjusted by changing the vibration amplitude of the metal film in the synthetic jet device; the jet frequency of the synthetic jet is controlled by the frequency of the voltage applied to the metal film, therefore, the jet can be generated at a corresponding frequency by adjusting the frequency of the voltage.

[0082] Specifically, by applying fast-response control algorithms (such as adaptive control algorithms), key control variables such as jet angle, frequency, and velocity are finely adjusted in real time. For example, if the jet frequency has been initially adjusted, and the jet frequency is a key parameter related to the vibration mode in the control system, the frequency response change of the vibration can be observed after adjustment. If the vibration amplitude decreases, the aerodynamic pressure distribution can be further optimized by adjusting the jet angle to balance aerodynamic performance and the flow field structure on the blade surface; if the vibration is still large, the jet velocity can be further optimized.

[0083] If the jet velocity has been initially adjusted, as it affects the airflow intensity, and if the velocity adjustment has yielded some results but the flow on the blade surface remains unstable or the aerodynamic performance is still unsatisfactory, the flow distribution can be further optimized by adjusting the jet angle. Adjusting the jet angle helps alter the interaction between the jet and the mainstream, and its impact on aerodynamic loads is crucial.

[0084] If the jet angle has already been initially adjusted, this adjustment primarily affects the interaction between the jet and the flow on the blade surface. If vibration issues persist after adjustment, fine-tuning of the frequency and velocity can further refine the control. Adjusting the frequency helps to better match the blade's vibration characteristics, while adjusting the velocity helps to strengthen or weaken the aerodynamic control effect. Throughout the optimization process, dynamic adjustment and feedback closed-loop response through multi-variable collaborative control achieve globally optimal flow field control, resulting in optimal vibration suppression.

[0085] Figure 5 This can serve as a flowchart for controlling wind turbine blade flutter under a second preset operating condition, such as... Figure 5 As shown, wind turbine blade flutter control under the second preset operating condition can be achieved through the following steps S201 to S206.

[0086] Step S201: Receive the vibration signal from the airfoil tail fed back by the sensor.

[0087] Step S202: Perform spectral analysis on the vibration signal at the tail of the airfoil to obtain the blade amplitude and vibration frequency.

[0088] Step S203: Compare the blade amplitude and vibration frequency with preset thresholds to determine the priority control variable (first control parameter).

[0089] Step S204: Adjust the priority control variables.

[0090] Step S205: Determine whether the target control result has been achieved for the priority control variable. If yes, execute step S205 below; otherwise, return to step S204.

[0091] Step S206: After the priority control variable is adjusted to the appropriate level, the remaining control variables are further adjusted to achieve optimal control.

[0092] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effect of this application, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of this application.

[0093] Furthermore, this application also provides a wind turbine blade flutter control device based on synthetic jet.

[0094] See appendix Figure 6 , Figure 6 This is a main structural block diagram of a wind turbine blade flutter control device based on synthetic jet according to an embodiment of this application.

[0095] like Figure 6 As shown, the wind turbine blade flutter control device based on synthetic jet in this embodiment 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 a single module.

[0096] In some embodiments, the setting module 11 can be configured to set a synthetic jet device at a preset position on the wind turbine blade.

[0097] The acquisition module 12 can be configured to acquire the first control parameters of the synthetic jet device.

[0098] The control module 13 can be configured to perform flutter control on the wind turbine blades according to the first control parameters.

[0099] In one implementation, a description of the specific functions can be found in steps S10-S30.

[0100] The aforementioned wind turbine blade flutter control device based on synthetic jet is used to perform... Figure 1 The embodiments of the wind turbine blade flutter control method based on synthetic jet shown are similar in technical principle, technical problem solved and technical effect. Those skilled in the art can clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the wind turbine blade flutter control device based on synthetic jet can be found in the embodiments of the wind turbine blade flutter control method based on synthetic jet, and will not be repeated here.

[0101] Furthermore, it should be understood that since the various modules are only provided to illustrate the functional units of the device described in this application, the physical devices corresponding to these modules may be the processor itself, or a part of the processor's software, hardware, or a combination of both. Therefore, the number of modules shown in the figures is merely illustrative.

[0102] Those skilled in the art will understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules will not cause the technical solution to deviate from the principles of this application; therefore, the technical solutions after splitting or combining will fall within the protection scope of this application.

[0103] Those skilled in the art will understand that all or part of the processes in the method of the above-described embodiment can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0104] Furthermore, this application also provides an electronic device, which may include at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program, which, when executed by the at least one processor, implements the wind turbine blade flutter control method based on synthetic jets as described in any of the above embodiments. See also Figure 7 As shown, Figure 7The structure of an electronic device, including a processor 100 and a memory 200, is illustrated by way of example.

[0105] Furthermore, this application also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to this application, the computer-readable storage medium can be configured to store a program that executes the wind turbine blade flutter control method based on synthetic jets described in the above-described method embodiments. This program can be loaded and run by a processor to implement the above-described wind turbine blade flutter control method based on synthetic jets. For ease of explanation, only the parts related to the embodiments of this application are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of this application. The computer-readable storage medium can be a memory device formed by various electronic devices. Optionally, in the embodiments of this application, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0106] The technical solution of this application has been described in conjunction with the specific embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this 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 all fall within the scope of protection of this application.

Claims

1. A method for controlling wind turbine blade flutter based on synthetic jet, characterized in that, The method includes: A synthetic jet device is installed at a predetermined position on the wind turbine blade; Obtaining the first control parameters of the synthetic jet device includes: Under the second preset operating condition, the vibration signal of the airfoil tail of the wind turbine blade is acquired; Spectral analysis of the vibration signal at the tail of the airfoil is performed to obtain the blade flutter characteristics, which include blade amplitude and vibration frequency. Determine whether the wind turbine blade is experiencing blade flutter based on the described blade flutter characteristics; When the wind turbine blade experiences flutter, a first control parameter is obtained based on the blade flutter characteristics, including: when the blade amplitude is greater than a preset threshold, the second jet velocity is used as the first control parameter; when the vibration frequency is within a preset threshold range, the second jet frequency is used as the first control parameter. The wind turbine blades are subjected to flutter control based on the first control parameters.

2. The wind turbine blade flutter control method based on synthetic jet according to claim 1, characterized in that, Under the first preset operating condition, the first control parameters of the synthetic jet device include the first jet frequency, the first jet velocity, and the first jet angle; The step of controlling the flutter of the wind turbine blades according to the first control parameter includes: Obtain the oscillation model of the 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 for the oscillation model of the synthetic jet device is: in, The instantaneous oscillation velocity of the synthetic jet. The first jet velocity, The first jet frequency, For time, The direction vector of the jet velocity of the synthetic jet device. The angle with the airfoil tangent direction is used express, This is the first jet angle.

4. The wind turbine blade flutter control method based on synthetic jet according to claim 1, characterized in that, The step of determining whether the wind turbine blade is fluttering based on the blade flutter characteristics includes: determining that the blade is fluttering when the blade amplitude is greater than a preset threshold or the vibration frequency is within a preset threshold range.

5. The wind turbine blade flutter control method based on synthetic jet according to claim 4, characterized in that, The step of controlling the flutter of the wind turbine blade according to the first control parameter includes: adjusting the second jet velocity when the blade amplitude is the first control parameter; and adjusting the second jet frequency when the vibration frequency is the first control parameter.

6. The wind turbine blade flutter control method based on synthetic jet according to claim 5, characterized in that, The method further includes: optimizing the second control parameter according to the first control parameter, wherein when the second jet velocity is used as the first control parameter, the second control parameter includes the second jet frequency and the second jet angle; when the second jet frequency is used as the first control parameter, the second control parameter includes the second jet velocity and the second jet angle.

7. The wind turbine blade flutter control method based on synthetic jet according to claim 1, characterized in that, The step of setting a synthetic jet device at a preset position on the wind turbine blade includes: 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.

8. An electronic device, characterized in that, include: At least one processor; And, a memory communicatively connected to the at least one processor; The memory stores a computer program, which, when executed by the at least one processor, implements the wind turbine blade flutter control method based on synthetic jet as described in any one of claims 1 to 7.

9. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the wind turbine blade flutter control method based on synthetic jet as described in any one of claims 1 to 7.

Images