Method and device for determining wind wheel structure, storage medium and electronic device

Abstract

This application discloses a method and apparatus for determining the structure of a wind turbine, a storage medium, and an electronic device. The method includes: determining a first radius of the front rotor of the wind turbine unit based on preset rated operating parameters and a target wind energy utilization efficiency; determining an initial second radius of the rear rotor of the wind turbine unit based on a preset proportional relationship and the first radius, wherein the front rotor and the rear rotor of the wind turbine unit rotate coaxially, with the front rotor located on the side of the rear rotor closer to the windward direction; performing flow field analysis on the front rotor and the rear rotor based on the first radius of the front rotor and the initial second radius of the rear rotor to determine the hollowed-out area of ​​the blades of the front rotor that ensures no interference between the flow fields of the front rotor and the rear rotor; replacing the blades in the hollowed-out area of ​​the front rotor with a hollow structure to obtain the target front rotor, wherein the wind turbine unit's rotor structure includes the target front rotor and the rear rotor. This improves the overall performance of the wind turbine unit and enables higher wind energy utilization.

Description

Technical Field

[0001] This application relates to the field of wind power generation, and more specifically, to a method and apparatus for determining a wind turbine structure, a storage medium, an electronic device, and a computer program product. Background Technology

[0002] Against the backdrop of the global energy transition, wind energy, as a clean and renewable energy source, has received widespread attention and vigorous promotion worldwide.

[0003] In related technologies, in order to generate electricity from wind energy, wind turbine generator sets, which include wind turbines, are typically used to generate electricity. A rotating wind turbine captures wind energy and converts it into electrical energy.

[0004] However, wind turbine generators in related technologies suffer from low wind energy utilization efficiency. Summary of the Invention

[0005] This application provides a method and apparatus for determining a wind turbine structure, a storage medium, an electronic device, and a computer program product.

[0006] According to one aspect of the embodiments of this application, a method for determining a wind turbine structure is provided. The method includes: determining a first radius of the front rotor of the wind turbine unit based on preset rated operating parameters of the wind turbine unit and a target wind energy utilization efficiency; determining an initial second radius of the rear rotor of the wind turbine unit based on a preset proportional relationship and the first radius, wherein the front rotor and the rear rotor of the wind turbine unit rotate coaxially, and the front rotor is located on the side of the rear rotor closer to the windward direction; performing flow field analysis on the front rotor and the rear rotor based on the first radius of the front rotor and the initial second radius of the rear rotor to determine the hollow area of ​​the blades of the front rotor that allows the flow fields of the front rotor and the rear rotor to be free from interference; replacing the blades in the hollow area of ​​the front rotor with a hollow structure to obtain a target front rotor, wherein the wind turbine unit's wind turbine structure includes a target front rotor and a rear rotor.

[0007] In an exemplary embodiment, flow field analysis is performed on the front and rear wind turbines based on a first radius of the front wind turbine and an initial second radius of the rear wind turbine to determine the hollowed-out region of the blades of the front wind turbine that ensures no interference between the flow fields of the front and rear wind turbines. This includes: constructing geometric models of the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine; simulating preset wind field environmental conditions for the geometric models of the front and rear wind turbines to determine the distribution of airflow between the front and rear wind turbines; determining the interference region where flow field interference occurs between the front and rear wind turbines based on the distribution of airflow between the front and rear wind turbines; determining the interference portion in the blades of the front wind turbine based on the interference region, wherein the blades of the interference portion of the front wind turbine are used to generate a flow field within the interference region; and defining the region where the blades of the interference portion of the front wind turbine are located as the hollowed-out region.

[0008] In an exemplary embodiment, after replacing the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine, the method further includes: constructing a combined wind turbine model of the wind turbine unit based on the target front wind turbine and the rear wind turbine; conducting simulation experiments on the combined wind turbine model to determine the wind energy utilization efficiency of the combined wind turbine model; and adjusting the initial second radius of the rear wind turbine when the wind energy utilization efficiency of the combined wind turbine model is lower than the target wind energy utilization efficiency, until the wind energy utilization efficiency of the combined wind turbine model reaches the target wind energy utilization efficiency.

[0009] In an exemplary embodiment, the method further includes: determining a lower limit for the spacing between the front and rear wind turbines based on the dimensions of the generator and gearbox of the wind turbine unit and the required layout space, wherein the front and rear wind turbines are respectively disposed at both ends of the main shaft of the generator; performing flow field analysis on the front and rear wind turbines based on a first radius of the front wind turbine and an initial second radius of the rear wind turbine to determine a spacing range between the front and rear wind turbines such that the flow field interference between the front and rear wind turbines is lower than a preset range; and determining the spacing between the front and rear wind turbines based on the spacing range and the lower limit, wherein the spacing between the front and rear wind turbines is greater than or equal to the lower limit.

[0010] In an exemplary embodiment, determining the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency includes: obtaining the rated wind speed and rated power of the wind turbine unit at the arrangement location of the wind turbine unit; and determining the first radius of the front rotor of the wind turbine unit based on the rated wind speed, rated power, target wind energy utilization efficiency and air density.

[0011] In an exemplary embodiment, the method further includes: determining the real-time wind energy utilization efficiency of the wind turbine unit during operation; and adjusting the area of ​​the hollowed-out region of the blades of the front wind turbine according to the current wind conditions when the real-time wind energy utilization efficiency is lower than the target wind energy utilization efficiency, so as to improve the wind energy utilization efficiency, wherein the wind conditions include wind speed, risk, and turbulence intensity.

[0012] According to another aspect of the embodiments of this application, a device for determining a wind turbine structure is also provided, the device comprising:

[0013] The front rotor determination module is used to determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0014] The rear wind turbine determining module is used to determine the initial second radius of the rear wind turbine of the wind turbine unit according to the preset proportional relationship and the first radius. The front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction.

[0015] The flow field determination module is used to perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, so as to determine the hollow area of ​​the blades of the front wind turbine that makes the flow fields of the front and rear wind turbines free from interference.

[0016] The hollowing-out determination module is used to replace the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine. The wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine.

[0017] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, wherein a computer program is stored in the computer-readable storage medium, and the computer program is configured to execute the above-described method for determining the wind turbine structure when it is run.

[0018] According to another aspect of the embodiments of this application, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the above-described method for determining the wind turbine structure through the computer program.

[0019] According to another aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the methods described in various embodiments of this application.

[0020] The aforementioned method for determining the wind turbine structure, through precise calculation and adjustment of the first radius of the front rotor, ensures that the wind turbine unit achieves ideal wind energy utilization efficiency under design wind speed and power conditions, laying a solid foundation for subsequent flow field analysis and rotor design optimization. Determining the initial second radius of the rear rotor ensures that the coordinated operation of the front and rear rotors is considered in the preliminary design of the wind turbine unit, avoiding wind energy loss due to size mismatch, and providing important parameters for optimizing flow field distribution and improving overall power generation efficiency. By accurately analyzing the flow field and determining the hollow area of ​​the front rotor blades, the wind energy capture efficiency of the dual-rotor system is significantly improved, eliminating the negative impact of turbulence on the performance of the rear rotor, and improving the overall power generation capacity and economy of the wind turbine unit. By replacing specific areas of the front rotor blades with hollow structures, not only is the impact of turbulence on the rear rotor reduced, but the structural safety and aerodynamic efficiency of the blades are also maintained. This innovative design significantly improves the overall performance of the wind turbine unit, ensuring stable power generation capabilities under different wind speeds and wind directions. The dual-turbine unit has a compact structure, high energy density, and high flow density, enabling higher wind energy utilization. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a hardware structure block diagram of the wind turbine structure determination method according to an embodiment of this application;

[0024] Figure 2 This is a flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0025] Figure 3 a is a second flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0026] Figure 3 b is a schematic diagram of a wind turbine structure according to an embodiment of this application;

[0027] Figure 4 This is a third flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0028] Figure 5 This is the fourth flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0029] Figure 6 This is the fifth flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0030] Figure 7 This is a flowchart of a method for determining a wind turbine structure according to an embodiment of this application;

[0031] Figure 8 This is a structural block diagram of a wind turbine structure determination device according to an embodiment of this application. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used in this way can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] The methods and embodiments provided in this application can be executed on a computer terminal or similar computing device. Taking running on a computer terminal as an example, Figure 1 This is a hardware structure block diagram of the computer terminal for the wind turbine structure determination method according to an embodiment of this application. (See diagram below.) Figure 1 As shown, a computer terminal may include one or more ( Figure 1Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor unit (MPU) or a programmable logic device (PLD)) and a memory 104 for storing data are also shown. In one exemplary embodiment, the computer terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that… Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the computer terminal described above. For example, the computer terminal may also include components that are more complex than those described above. Figure 1 The more or fewer components shown, or having the same Figure 1 Equivalent functions or ratios shown Figure 1 The functions shown have more different configurations.

[0035] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the wind turbine structure determination method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thus implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to a computer terminal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0036] The transmission device 106 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider for the computer terminal. In one example, the transmission device 106 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 106 may be a Radio Frequency (RF) module used for wireless communication with the Internet.

[0037] This embodiment provides a method for determining the wind turbine structure. Figure 2 This is a flowchart of an optional wind turbine structure determination method according to an embodiment of this application, the process including the following steps S200-S230:

[0038] Step S200: Determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0039] Specifically, based on the design specifications of the wind turbine unit, including rated wind speed, rated power and expected wind energy utilization efficiency, the optimal radius size of the front rotor (the rotor facing the wind) is calculated to ensure that the unit can achieve the preset power generation efficiency target under rated conditions.

[0040] Rated operating parameters refer to the maximum power generation and other operating indicators of the wind turbine unit under standard wind speed. Wind energy utilization efficiency indicates the effectiveness of the wind turbine in capturing and converting wind energy into electrical energy, usually represented by η. The larger the value of η, the higher the efficiency.

[0041] Step S210: Determine the initial second radius of the rear rotor of the wind turbine unit according to the preset proportional relationship and the first radius.

[0042] In this wind turbine unit, the front and rear wind turbines rotate coaxially, with the front wind turbine located on the side of the rear wind turbine closer to the windward direction.

[0043] Specifically, based on the known radius of the front rotor (R1), the preliminary radius of the rear rotor (R2) is calculated according to the size ratio between the front and rear rotors in a twin-rotor design. This ratio is usually based on rotor design principles and preliminary fluid dynamics analysis results.

[0044] For example, the value of R2 is determined by selecting a suitable scaling factor (usually between 0.6 and 0.8) according to the formula R2 = (0.6~0.8)*R1. The selection of this scaling factor needs to take into account both the wind energy capture capability of the front wind turbine and the wind energy reception efficiency of the rear wind turbine, so as to achieve a balance between the front and rear wind turbines and improve the overall power generation efficiency.

[0045] Step S220: Perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine to determine the hollow area of ​​the blades of the front wind turbine that ensures no interference between the flow fields of the front and rear wind turbines.

[0046] Specifically, computational fluid dynamics (CFD) technology can be used to simulate the flow field of the wind turbine. The purpose is to identify the areas on the front wind turbine blades that need to be hollowed out to ensure that their rotation will not adversely affect the wind environment of the rear wind turbine, thereby improving the overall wind energy utilization efficiency of the dual wind turbine system.

[0047] For example, the dimensional parameters of the front wind turbine (R1) and the rear wind turbine (R2) are input into the CFD software, and boundary conditions such as wind speed, wind direction, and turbulence intensity are set to simulate the flow field. By analyzing the streamline diagram, pressure distribution, and turbulence intensity diagram, the regions on the front wind turbine blades that interfere with the wind field of the rear wind turbine are identified. The blades in these regions are adjusted to have a hollow structure to reduce the impact of turbulence.

[0048] Among them, flow field analysis assesses the impact of wind turbine design on wind resources by simulating the flow of wind around the turbine. The hollowed-out area is a region on the front turbine blades designed with a hollow structure to reduce interference with the wind field of the rear turbine and improve wind energy utilization efficiency.

[0049] Step S230: Replace the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine.

[0050] The wind turbine structure of the wind turbine unit includes the front wind turbine and the rear wind turbine.

[0051] Specifically, after determining the hollow areas of the front wind turbine blades, the blade structure in these areas is transformed from solid blades to hollow structures to further reduce turbulence effects while ensuring the structural strength and aerodynamic performance of the blades. The hollow structure can be connected by a steel frame or supported by a truss structure, without an airfoil.

[0052] For example, based on the flow field analysis results, a hollow structure for the blades within the hollowed-out area is designed. This ensures that these structures effectively reduce the effects of turbulence without increasing the risk of blade fatigue or damage due to structural changes. After the hollow structure design is completed, the blades are manufactured and installed onto the wind turbine to form the target wind turbine.

[0053] In this embodiment, by accurately calculating and adjusting the first radius of the front rotor, the wind turbine unit can achieve ideal wind energy utilization efficiency under design wind speed and power conditions, laying a solid foundation for subsequent flow field analysis and rotor design optimization. Determining the initial second radius of the rear rotor ensures that the coordinated operation of the front and rear rotors is considered in the initial design of the wind turbine unit, avoiding wind energy loss due to size mismatch, and providing important parameters for optimizing flow field distribution and improving overall power generation efficiency. By accurately analyzing the flow field and determining the hollow area of ​​the front rotor blades, the wind energy capture efficiency of the dual-rotor system is significantly improved, eliminating the negative impact of turbulence on the performance of the rear rotor, and improving the overall power generation capacity and economy of the wind turbine unit. By replacing specific areas of the front rotor blades with hollow structures, not only is the impact of turbulence on the rear rotor reduced, but the structural safety and aerodynamic efficiency of the blades are also maintained. This innovative design significantly improves the overall performance of the wind turbine unit, ensuring stable power generation capacity under different wind speeds and wind directions. The dual-rotor unit has a compact structure, high energy density, and high flow density, enabling higher wind energy utilization.

[0054] In one embodiment, such as Figure 3 As shown in step a, step S220 involves performing flow field analysis on the front and rear wind turbines based on the first radius of the front turbine and the initial second radius of the rear turbine to determine the hollowed-out area of ​​the front turbine blades that ensures no interference between the flow fields of the front and rear turbines. This includes steps S300-S330:

[0055] Step S300: Construct the geometric models of the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine.

[0056] Specifically, a three-dimensional geometric model is created based on the exact dimensions of the front and rear wind turbines to facilitate subsequent hydrodynamic analysis. The construction of this virtual model enables precise control and visual evaluation of the wind turbine design.

[0057] For example, using professional Computer-Aided Design (CAD) software, the values ​​of the first radius R1 of the front wind turbine and the second radius R2 of the rear wind turbine are input to design three-dimensional models of the front and rear wind turbines that conform to design specifications. The models should include details such as the shape, thickness, and torsion angle of the blades, as well as the relative position and spacing design between the wind turbines.

[0058] Step S310: Simulate the preset wind field environment conditions for the geometric models of the front and rear wind turbines to determine the distribution of airflow between the front and rear wind turbines.

[0059] Specifically, based on a three-dimensional geometric model, CFD software is used to simulate the wind field conditions of the wind turbine's environment, including wind speed, wind direction, and turbulence intensity, thereby assessing the distribution of airflow as it passes through the front and rear rotors. This simulation helps to understand the interaction of airflow in a dual-rotor system, providing a basis for optimized design.

[0060] For example, the geometric models of the front and rear wind turbines are imported into CFD software, and the boundary conditions of the actual wind field are set, such as average wind speed, wind direction variation range, and terrain influence, to perform fluid dynamics simulation. The software will output a velocity vector map, pressure distribution map, and turbulence intensity map of the airflow passing through the wind turbines.

[0061] The preset wind farm environmental conditions are parameters such as wind speed, wind direction, and turbulence intensity, set based on typical wind data from the wind turbine operating location. The airflow distribution is information such as the velocity, direction, and intensity of the airflow around the wind turbine, as displayed in the CFD simulation results.

[0062] Step S320: Based on the distribution of airflow between the front and rear impellers, determine the interference region where flow field interference occurs between the front and rear impellers.

[0063] Specifically, based on the results of CFD simulations, the flow patterns between the two impellers were analyzed, identifying the regions where the blades of the front impeller affect the airflow into the rear impeller—the flow field interference regions. This analysis helps determine the optimal location for the blade cutouts to reduce airflow drag and turbulence effects on the rear impeller.

[0064] For example, the CFD simulation results are post-processed to focus on analyzing the airflow distribution in front of the rear rotor, identifying regions where the airflow velocity decreases significantly and the turbulence intensity increases. These regions indicate that the blades of the front rotor may be causing unfavorable flow field interference to the rear rotor, requiring hollowing-out design in subsequent steps.

[0065] Among them, flow field interference refers to the airflow phenomenon that affects the normal air intake of the rear wind turbine when the front wind turbine blades rotate, which will lead to a decrease in the aerodynamic performance of the rear wind turbine.

[0066] Step S330: Determine the interference portion in the blades of the front wind turbine based on the interference region.

[0067] The blades in the interference section of the front wind turbine are used to generate a flow field within the interference region.

[0068] Specifically, the interference areas identified in step three will be further refined and precisely located to specific parts on the front rotor blades. These parts will be designed as hollow structures in the next step to reduce their impact on the rear rotor wind field.

[0069] For example, streamline diagrams and turbulence intensity maps generated by CFD simulations are used to analyze which blade regions cause the greatest disturbance to the airflow; these regions are typically located in the inner blade region. These regions are marked as interference areas, ready for cutout design in subsequent steps.

[0070] The interference section refers to the area on the front wind turbine blades that adversely affects the wind field of the rear wind turbine.

[0071] Step S340: Determine the area where the blades of the interference part in the front wind turbine blades are located as the hollow area.

[0072] Specifically, based on the identified interference area, the specific region on the front rotor blades to implement the hollow design is determined. This design aims to reduce turbulence and airflow resistance, optimize the operating environment of the rear rotor, and thus improve the overall power generation efficiency of the wind turbine.

[0073] For example, on the design drawings of the front rotor blades, all identified interference areas are marked and designated as hollowed-out areas. The blade tip is preserved to maintain the blade's aerodynamic performance, and only certain areas in the middle and root are hollowed out to reduce interference with the rear rotor's wind field.

[0074] For example, such as Figure 3 As shown in Figure b, the front impeller is positioned on the side of the rear impeller closer to the windward direction, and both impellers are coaxially mounted on the same generator. The front impeller has a radius of R1, with the hollowed-out area being the blade portion of radius R0. The rear impeller has a radius of R2. After removing the hollowed-out area from the front impeller, the flow field generated by the remaining blades is the first flow field, and the flow field generated by the rear impeller is the second flow field. There is no interference between the first and second flow fields.

[0075] In this embodiment, constructing an accurate three-dimensional geometric model is a prerequisite for fluid dynamics analysis. Through model-based design, the aerodynamic performance of the wind turbine can be preliminarily assessed and optimized. Flow field simulation provides a clear understanding of the airflow distribution and interaction under preset wind field conditions, offering a quantitative basis for determining the flow field interference region. This helps further optimize the wind turbine design and reduce the impact of turbulence on power generation efficiency. Identifying and determining the flow field interference region is crucial for optimizing wind turbine blade design. Detailed analysis of simulation results allows for the location of blade sections requiring hollowing out, effectively reducing airflow resistance on the rear wind turbine and improving overall power generation efficiency. Locating the interference parts of the blades provides precise guidance for designing the hollowed-out structure, helping to accurately remove blade regions that negatively impact the performance of the rear wind turbine, thereby improving the overall efficiency of the dual-wind turbine system. Identifying the interference parts of the front wind turbine blades as hollowed-out regions and removing the blade structure in these areas significantly reduces the impact of turbulence on the rear wind turbine, optimizes the flow field distribution, and improves the power generation efficiency and economy of the wind turbine.

[0076] In one embodiment, such as Figure 4 As shown, after replacing the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure in step S230 to obtain the target front wind turbine, the method further includes: steps S400-S420:

[0077] Step S400: Construct a combined wind turbine model of the wind turbine unit based on the target front and rear wind turbines.

[0078] Specifically, the optimized front and rear rotors are integrated to create a three-dimensional combined model representing the entire wind turbine unit. This model aims to provide a complete wind turbine system framework for subsequent wind energy utilization efficiency assessments.

[0079] For example, using CAD software, two 3D models of the wind turbines are constructed according to their actual dimensions and openwork design. These two models are then placed in predetermined relative positions to reflect the actual layout of the wind turbine unit, forming a combined wind turbine model.

[0080] Step S410: Conduct a simulation experiment on the combined wind turbine model to determine the wind energy utilization efficiency of the combined wind turbine model.

[0081] Specifically, in this step, CFD (Computational Fluid Dynamics) simulations are used to evaluate the wind energy utilization efficiency of the combined wind turbine model under preset wind field conditions. The simulation experiments aim to verify the actual power generation performance of the dual-wind turbine system and determine whether the design goals have been achieved.

[0082] For example, a combined wind turbine model is imported into CFD software, and simulation parameters such as wind speed, wind direction, and turbulence intensity are set to perform fluid dynamics simulation. The airflow distribution, pressure gradient, and turbulence intensity of the wind turbine under different wind conditions are analyzed, and the formula η=P / (1 / 2ρv) is used for calculation. 2 A), where η is the wind energy utilization efficiency, P is the power generation, ρ is the air density, v is the wind speed, and A is the swept area of ​​the wind turbine, thus obtaining the wind energy utilization efficiency of this model.

[0083] Step S420: If the wind energy utilization efficiency of the combined wind turbine model is lower than the target wind energy utilization efficiency, adjust the initial second radius of the wind turbine.

[0084] In this process, after adjusting the initial second radius of the rear wind turbine, a simulation experiment is conducted again on the combined wind turbine model to determine its wind energy utilization efficiency. If the wind energy utilization efficiency does not meet the target, the second radius of the rear wind turbine is adjusted again until the wind energy utilization efficiency of the combined wind turbine model reaches the target wind energy utilization efficiency.

[0085] Specifically, if the wind energy utilization efficiency of the combined wind turbine model determined in the first two steps fails to reach the expected target value, this step will involve adjusting the size of the combined wind turbine, i.e. its radius, in an attempt to improve the wind energy utilization efficiency to the target level.

[0086] For example, according to the formula R2 = k * R1, where k is an adjustment coefficient, the second radius (R2) of the wind turbine is gradually decreased or increased, and CFD simulation experiments are performed again for each adjusted combined wind turbine model until the optimal R2 value that makes the η value reach or approach the target efficiency is found. The efficiency results corresponding to each set of parameters need to be recorded during the adjustment process for analysis.

[0087] For example, it is also necessary to determine the twist angle design of the wind turbine blades.

[0088] Specifically, the twist angle design refers to the variation of the blade's angle of attack (i.e., the angle between the blade chord and the wind direction) along its length, and is an important factor affecting the aerodynamic performance of wind turbine blades. This step aims to determine the most suitable twist angle design scheme for the front and rear rotor blades in a twin-rotor system, based on their specific positions and functions.

[0089] For example, the traditional twist angle design of the front wind turbine blade tip: Based on the function of the front wind turbine blade (i.e., the hollowed-out portion reduces interference with the airflow of the rear wind turbine, and the blade tip maintains a traditional design to preserve good aerodynamic performance), and referring to mature single wind turbine blade design experience, the blade tip of the front wind turbine blade is designed with a twist angle. Considering that the blade tip needs to interact efficiently with the airflow to ensure the overall efficiency of the wind turbine, special attention must be paid to the aerodynamic characteristics of the blade at this point during the design. The overall traditional twist angle design of the rear wind turbine blade: As one of the main components for wind energy capture, the design of the rear wind turbine blade is directly related to the power generation efficiency of the entire unit. Since the rear wind turbine is not affected by the turbulence of the front wind turbine, the mature single wind turbine blade design principle can be used for the twist angle design to ensure that the blade can effectively capture wind energy and convert it into mechanical energy under different wind speeds and directions, thereby driving the generator.

[0090] Among them, the twist angle design refers to the variation of the blade's angle of attack along its length. By adjusting the angle of attack of various parts of the blade, the aerodynamic performance of the blade can be optimized, and the wind energy capture efficiency can be improved. The configuration design refers to the geometric shape and structural layout design of the wind turbine blades, including the blade's length, width, thickness, material selection, and reinforcement structure. The configuration design directly affects the mechanical and aerodynamic performance of the blades.

[0091] In this embodiment, by constructing a combined wind turbine model, the overall performance of the dual-wind turbine system under different wind conditions can be comprehensively analyzed and evaluated, providing a foundation for subsequent efficiency testing and optimization. Simulation experiments allow for a quantitative evaluation of the actual wind energy utilization efficiency of the dual-wind turbine design, providing direct feedback data for subsequent performance optimization and parameter adjustments. By repeatedly adjusting the turbine radius and verifying its impact on wind energy utilization efficiency, the dimensional parameters that optimize or closely approximate the system performance can be identified. This process optimizes the aerodynamic coupling between the turbines and improves the overall power generation efficiency.

[0092] In one embodiment, such as Figure 5 As shown, the method further includes steps S500-S520:

[0093] Step S500: Determine the lower limit of the distance between the front and rear wind turbines based on the dimensions of the generator and gearbox of the wind turbine unit and the required layout space.

[0094] The front and rear wind turbines are respectively located at both ends of the generator's main shaft.

[0095] Specifically, sufficient space must be maintained between the front and rear rotors to accommodate other critical components of the wind turbine unit, such as the generator and gearbox, avoiding mechanical interference while ensuring the feasibility of electrical and mechanical connections. The lower limit of the spacing is determined based on hardware dimensions and layout requirements.

[0096] For example, first, the actual dimensions of the generator and gearbox are measured, including width, length, and height. A safety margin needs to be added to these actual dimensions to account for potential vibrations and thermal expansion during operation. Then, based on the overall layout of the wind turbine unit, the minimum feasible distance between the two ends of the generator main shaft (the mounting positions of the front and rear rotors) is determined to ensure that all components can be installed safely without affecting the rotation of the rotors.

[0097] The minimum spacing requirement is the minimum distance that must be maintained between the front and rear rotors to ensure the safety of the installation and operation of internal components of the wind turbine unit. Layout space refers to the available space within the wind turbine unit for installing components such as generators and gearboxes, taking into account component dimensions, connection methods, and safety margins.

[0098] Step S510: Perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine to determine the spacing range between the front and rear wind turbines that makes the flow field interference between them lower than a preset range.

[0099] Specifically, based on known wind turbine dimensions, simulations are performed using fluid dynamics analysis software to determine the optimal spacing between the front and rear wind turbines. This ensures that the impact of turbulence and wake generated by the front turbine on the rear turbine is minimized, thereby improving wind energy utilization efficiency. Determining this spacing range requires consideration of flow field analysis results, taking into account turbulence intensity, wind speed distribution, and the aerodynamic performance of the wind turbines.

[0100] For example, in CFD (Computational Fluid Dynamics) software, the dimensional parameters of the front and rear wind turbines, as well as the locations of the generator and gearbox, are input. Multiple simulations are performed with different spacing values, and the flow field distribution between the turbines, including wind speed, turbulence intensity, and pressure changes, is analyzed for each spacing setting. Through comparative analysis, the spacing range between the front and rear wind turbines is determined when the flow field disturbance is below a preset range.

[0101] Among them, flow field disturbance refers to the adverse effects of turbulence and wake generated when the front rotor rotates on the normal operation of the rear rotor, manifested as a decrease in airflow velocity and an increase in turbulence intensity. The preset range is the allowable range of flow field disturbance set according to the performance requirements of the wind turbine unit, to ensure that wind energy utilization efficiency is not significantly affected.

[0102] Step S520: Determine the spacing between the front and rear wind turbines based on the spacing range and the lower limit of the spacing.

[0103] Among them, the distance between the front wind turbine and the rear wind turbine is greater than or equal to the lower limit of the distance.

[0104] Specifically, by combining the determined lower limit of the spacing with the spacing range obtained through flow field analysis, the exact spacing between the front and rear wind turbines is finally determined. This spacing must simultaneously meet mechanical installation requirements and aerodynamic performance optimization goals, ensuring a balance between internal space utilization and power generation efficiency of the wind turbine unit.

[0105] For example, based on the flow field analysis results, the value closest to the lower limit of the spacing, where the turbulence interference is below a preset range, is selected as the final spacing. If the flow field analysis shows that the preset aerodynamic performance requirements can be met even at the lower limit of the spacing, then this lower limit of the spacing can be used as the final spacing value to minimize the total footprint of the wind turbine unit and reduce the construction costs of the tower and foundation. Conversely, if the lower limit of the spacing does not meet the preset range of flow field interference, a greater spacing obtained from the flow field analysis needs to be selected to optimize aerodynamic performance.

[0106] In this embodiment, determining an appropriate lower limit for the spacing not only ensures the correct installation and operation of the internal components of the wind turbine unit but also provides fundamental parameters for subsequent flow field analysis. This ensures sufficient space between the front and rear rotors to reduce flow field interference, laying the foundation for improving wind energy utilization efficiency. The spacing range determined through flow field analysis can significantly reduce flow field interference between the front and rear rotors, optimize the aerodynamic performance of the wind turbine unit, improve wind energy capture efficiency, and ensure stable operation of the dual-rotor system under different wind speed conditions, providing strong support for improving the overall performance of the wind turbine unit. The final determined spacing not only meets the physical requirements for the installation of mechanical components but also optimizes the flow field distribution between the dual-rotor system, reduces turbulence interference, and improves wind energy utilization efficiency. This design decision helps balance the structural safety and aerodynamic performance of the wind turbine unit while reducing construction costs and improving the economic benefits of wind power projects.

[0107] In one embodiment, such as Figure 6 As shown, step S200 determines the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency. This includes steps S600-S610:

[0108] Step S600: Obtain the rated wind speed and rated power of the wind turbine unit at its location.

[0109] Specifically, the two key parameters for determining the wind turbine unit's operation at a predetermined location are the rated wind speed and the rated power. The rated wind speed reflects the typical operating wind speed considered during the design of the wind turbine unit, while the rated power is the maximum power generation output that the wind turbine unit is expected to achieve at that wind speed.

[0110] For example, typical wind speed conditions at the target installation location are determined by referring to wind resource assessment reports or on-site wind speed records. The expected maximum output power of the wind turbine is then set based on project requirements, market electricity prices, and wind turbine design specifications.

[0111] Step S610: Determine the first radius of the front rotor of the wind turbine unit based on the rated wind speed, rated power, target wind energy utilization efficiency, and air density.

[0112] Specifically, based on the obtained rated wind speed, rated power, and preset target wind energy utilization efficiency, combined with air density parameters, the ideal radius of the front wind turbine is calculated using physical formulas. This radius is a key dimension for the wind turbine to efficiently convert wind energy into electrical energy. Parameter adjustment and verification: The initially calculated radius value may need to be fine-tuned according to actual conditions. CFD (Computational Fluid Dynamics) software is used to simulate the wind field and verify the performance of the front wind turbine's design radius under actual operating conditions, ensuring that the wind energy utilization efficiency reaches or approaches the target value.

[0113] For example, firstly, using the formula Where P is the rated power (unit: kilowatt), ρ is the air density (unit: kilogram / cubic meter), V is the design wind speed (unit: meter / second), η is the wind energy utilization efficiency, and R is the front rotor radius (unit: meter). Given P, V, and η, the theoretical value of R1 can be calculated in reverse. Then, based on wind rotor design experience, the theoretical value of R1 can be fine-tuned to ensure that the target wind energy utilization efficiency can be achieved or approached under actual wind field conditions.

[0114] In this embodiment, obtaining accurate rated wind speed and rated power data provides the necessary conditions for the next step of calculating the first radius of the front rotor, ensuring that the rotor design meets the expected power generation efficiency and wind farm environment. Through precise calculation, the ideal radius of the front rotor is determined. This step is crucial to ensuring that the wind turbine can operate efficiently at a predetermined wind speed and achieve the target wind energy utilization efficiency. The calculated radius value directly affects the rotor's ability to capture wind energy, thereby affecting the overall power generation efficiency of the wind turbine.

[0115] In one embodiment, such as Figure 7 As shown, the method further includes steps S700-S710:

[0116] Step S700: During the operation of the wind turbine unit, determine the real-time wind energy utilization efficiency of the wind turbine unit.

[0117] Specifically, monitoring the wind energy utilization efficiency of wind turbine units in actual operating environments, i.e., instantaneous efficiency, is used to assess whether the real-time power generation performance of wind turbine units meets expected targets. The determination of real-time wind energy utilization efficiency is the foundation for the implementation of subsequent adjustment strategies.

[0118] For example, sensor deployment involves installing wind speed sensors, power sensors, etc., on the wind turbine to continuously collect on-site wind speed data and real-time power generation data. The actual wind energy utilization efficiency is calculated based on the collected data, such as wind speed and power generation.

[0119] Step S710: When the real-time wind energy utilization efficiency is lower than the target wind energy utilization efficiency, adjust the area of ​​the hollowed-out area of ​​the front wind turbine blades according to the current wind conditions to improve the wind energy utilization efficiency.

[0120] The wind conditions include wind speed, risk, and turbulence intensity.

[0121] Specifically, when the wind energy utilization efficiency monitored in real time is lower than the design target, the area of ​​the hollow area of ​​the front wind turbine blades is adjusted according to the current wind conditions (such as wind speed, wind direction and turbulence intensity) to reduce turbulence and airflow interference and improve wind energy utilization efficiency.

[0122] For example, wind condition sensing: Wind conditions are detected in real time using devices such as wind speed sensors and wind direction sensors, and the data is transmitted to the control center. Opening area adjustment: Based on real-time wind conditions and the aerodynamic characteristics of the front rotor blades, the opening size of the opening area is adjusted via a control mechanism, such as a hydraulic or electric actuator. Under low wind speed conditions, the opening area can be appropriately reduced to minimize wind energy loss; under high wind speed and high turbulence conditions, the opening area needs to be increased to avoid adverse effects on the rear rotor wind field. Closed-loop control strategy: A closed-loop control system is established to monitor wind energy utilization efficiency in real time and dynamically adjust the opening area based on the difference between the efficiency and the target value, ensuring that the wind turbine unit always operates in optimal condition.

[0123] Among these features, the area of ​​the perforated region is adjusted: the size of the perforated region is dynamically changed according to wind force variations to optimize airflow paths and improve wind energy utilization efficiency. The closed-loop control strategy adjusts system parameters (such as the area of ​​the perforated region) based on real-time feedback signals (such as real-time wind energy utilization efficiency) to make the system performance (efficiency) as close as possible to the ideal target.

[0124] In this embodiment, determining the real-time wind energy utilization efficiency provides immediate feedback on the power generation efficiency of the wind turbine, offering accurate data support for subsequent adjustment strategies. This helps in responding quickly to changes in wind conditions, optimizing operational status, and improving overall power generation efficiency. By dynamically adjusting the area of ​​the hollowed-out region of the front rotor blades based on real-time wind conditions, the impact of turbulence can be effectively reduced, the flow field distribution optimized, and the wind energy utilization efficiency of the wind turbine improved under various wind conditions. This adaptive adjustment mechanism enhances the system's flexibility and response speed, helping to maintain high-efficiency power generation when wind field conditions change, reducing energy waste, and increasing the economic benefits of the wind turbine.

[0125] In one embodiment, after the wind turbine structure of the wind turbine unit, including the target front wind turbine and the rear wind turbine, is assembled, it is still necessary to carry out dual wind turbine unit control and load assessment.

[0126] Specifically, the goal of this phase is to assess the load conditions of dual-rotor wind turbines under different operating conditions, and to design or adjust control strategies to handle these loads. Load assessment is a critical step in ensuring the long-term safe operation and structural integrity of wind turbines, while optimizing control strategies can improve the operating efficiency and stability of wind turbines.

[0127] For example, load assessment can use numerical simulation software to perform dynamic load analysis on wind turbines, including but not limited to aerodynamic loads, gravity loads, inertial loads, and tower vibrations, to evaluate the impact of these loads on the wind turbine structure. Control strategy adjustment: Based on the load assessment results, the control strategies for the wind turbine and generator are designed or adjusted, such as pitch angle control, generator torque control, and coordinated control between the wind turbine and the generator, to ensure safe operation of the unit under various wind conditions while maximizing power generation efficiency.

[0128] Specifically, after conducting an initial load assessment of the dual-rotor wind turbine, if the load is found to exceed the design safety range or affect power generation efficiency, this step will adjust the parameters of the wind turbine, such as the rotor diameter, blade shape, and materials, based on the assessment results, in order to optimize the load distribution and improve structural safety and power generation performance.

[0129] For example, based on the load assessment results, design optimization software (such as Optistruct, Isight, etc.) is used to adjust the wind turbine parameters for multi-objective optimization, ensuring that power generation efficiency is improved while meeting structural safety requirements. After adjusting the parameters, load simulation and evaluation need to be performed again to verify the adjustment effect and ensure that the optimized wind turbine parameters can effectively solve the previous problems. This may require multiple iterative adjustments until the optimal balance point is reached.

[0130] This involves identifying the physical quantities affecting wind turbine performance and loads, including turbine radius, blade geometry, and blade material properties. The design process also incorporates optimization methods that consider multiple objectives simultaneously (such as structural safety, power generation efficiency, and cost control) to find the optimal solution that satisfies all these objectives.

[0131] Based on the aerodynamic and structural data of the wind turbine blades before and after load optimization.

[0132] Specifically, after load assessment and wind turbine parameter adjustment, the aerodynamic performance data and structural design data of the wind turbine blades before and after optimization are updated based on the optimization results. This ensures that the wind turbine blades can efficiently capture wind energy and maintain good mechanical performance under the optimized wind turbine parameters, so as to cope with the optimized load distribution.

[0133] For example, CFD software is used for flow field analysis and aerodynamic performance simulation. Based on the optimized rotor parameters, the aerodynamic performance indicators of the blades, such as lift, drag, and angle of attack, are recalculated to ensure the blade design remains effective under the optimized rotor parameters. Structural design data updates: Combining the load optimization results and aerodynamic performance data, finite element analysis software is used to evaluate and adjust the blade structure. This includes optimizing the blade thickness distribution, strengthening the blade root structure, and selecting more suitable materials to meet the optimized mechanical requirements while maintaining or improving aerodynamic performance.

[0134] Aerodynamic performance data describes the physical quantities that govern the blade's behavior in airflow, such as lift coefficient, drag coefficient, angle of attack, and flow field distribution, which directly affect wind energy conversion efficiency. Structural design data refers to the blade's structural properties, including material, thickness, strength, and stiffness, which have a decisive impact on the blade's load-bearing capacity and lifespan.

[0135] In this embodiment, load assessment comprehensively identifies the mechanical challenges that wind turbines may encounter during operation, ensuring structural durability and safety. Optimization of control strategies helps wind turbines maintain stable operation under complex wind farm conditions, improving wind energy utilization efficiency and reducing operation and maintenance costs. Load optimization by adjusting rotor parameters can improve power generation efficiency, reduce operational risks, and extend turbine lifespan while ensuring structural safety, thus guaranteeing the economic efficiency and reliability of wind turbines. Comprehensive optimization of blade aerodynamic performance and structural design data can further enhance the power generation efficiency and structural safety of wind turbines under optimized rotor parameters, ensuring that blades maintain optimal performance under different wind conditions and loads, providing strong support for the long-term stable operation and high power generation efficiency of wind turbines.

[0136] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0137] This embodiment also provides a device for determining the wind turbine structure, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0138] Figure 8 This is a structural block diagram of an optional wind turbine structure determining device according to an embodiment of this application. Figure 8 As shown, it includes:

[0139] The front rotor determination module 801 is used to determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0140] The rear wind turbine determining module 802 is used to determine the initial second radius of the rear wind turbine of the wind turbine unit according to the preset proportional relationship and the first radius. The front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction.

[0141] The flow field determination module 803 is used to perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, so as to determine the hollow area of ​​the blades of the front wind turbine that makes the flow fields of the front and rear wind turbines free from interference.

[0142] The hollowing determination module 804 is used to replace the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine. The wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine.

[0143] In an exemplary embodiment, the flow field determination module 803 is further configured to: construct geometric models of the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine; simulate preset wind field environmental conditions for the geometric models of the front and rear wind turbines to determine the distribution of airflow between the front and rear wind turbines; determine the interference region where flow field interference occurs between the front and rear wind turbines based on the airflow distribution between them; determine the interference portion in the blades of the front wind turbine based on the interference region, wherein the blades of the interference portion of the front wind turbine are used to generate a flow field within the interference region; and define the region where the blades of the interference portion of the front wind turbine are located as a hollow region.

[0144] In one exemplary embodiment, the above-described apparatus further includes:

[0145] The model building module is used to construct a combined wind turbine model of the wind turbine unit based on the target front and rear wind turbines.

[0146] The simulation module is used to conduct simulation experiments on the combined wind turbine model to determine the wind energy utilization efficiency of the combined wind turbine model.

[0147] The adjustment module is used to adjust the initial second radius of the wind turbine when the wind energy utilization efficiency of the combined wind turbine model is lower than the target wind energy utilization efficiency, until the wind energy utilization efficiency of the combined wind turbine model reaches the target wind energy utilization efficiency.

[0148] In one exemplary embodiment, the above-described apparatus further includes:

[0149] The spacing lower limit determination module is used to determine the lower limit of the spacing between the front and rear wind turbines based on the dimensions of the generator and gearbox of the wind turbine unit and the required layout space. The front and rear wind turbines are respectively set at both ends of the generator's main shaft.

[0150] The spacing range determination module is used to perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, so as to determine the spacing range between the front and rear wind turbines that makes the flow field interference between the front and rear wind turbines lower than a preset range.

[0151] The spacing determination module is used to determine the spacing between the front and rear wind turbines based on the spacing range and the lower limit of the spacing, wherein the spacing between the front and rear wind turbines is greater than or equal to the lower limit of the spacing.

[0152] In an exemplary embodiment, the aforementioned front rotor determination module 801 is further configured to: obtain the rated wind speed and rated power of the wind turbine unit at its location; and determine the first radius of the front rotor of the wind turbine unit based on the rated wind speed, rated power, target wind energy utilization efficiency, and air density.

[0153] In one exemplary embodiment, the above-described apparatus further includes:

[0154] The efficiency determination module is used to determine the real-time wind energy utilization efficiency of the wind turbine unit during its operation.

[0155] The area adjustment module is used to adjust the area of ​​the hollowed-out area of ​​the front wind turbine blades according to the current wind conditions when the real-time wind energy utilization efficiency is lower than the target wind energy utilization efficiency, so as to improve the wind energy utilization efficiency. The wind conditions include wind speed, risk, and turbulence intensity.

[0156] Embodiments of this application also provide a storage medium including a stored program, wherein the program executes any of the methods described above when it is run.

[0157] Optionally, in this embodiment, the storage medium may be configured to store program code for performing the following steps:

[0158] S1. Determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0159] S2. Based on the preset proportional relationship and the first radius, determine the initial second radius of the rear wind turbine of the wind turbine unit. The front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction.

[0160] S3. Based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, perform flow field analysis on the front and rear wind turbines to determine the hollow area of ​​the blades of the front wind turbine that ensures no interference between the flow fields of the front and rear wind turbines.

[0161] S4, replace the blades in the hollow area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine, wherein the wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine.

[0162] Embodiments of this application also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0163] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0164] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0165] S1. Determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0166] S2. Based on the preset proportional relationship and the first radius, determine the initial second radius of the rear wind turbine of the wind turbine unit. The front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction.

[0167] S3. Based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, perform flow field analysis on the front and rear wind turbines to determine the hollow area of ​​the blades of the front wind turbine that ensures no interference between the flow fields of the front and rear wind turbines.

[0168] S4, replace the blades in the hollow area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine, wherein the wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine.

[0169] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0170] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium storing the computer program product, wherein the computer program, when executed by a processor, implements the steps of the methods in various embodiments of this application.

[0171] Optionally, in this embodiment, the computer program described above can be configured to perform the following steps when executed by a processor:

[0172] S1. Determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency.

[0173] S2. Based on the preset proportional relationship and the first radius, determine the initial second radius of the rear wind turbine of the wind turbine unit. The front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction.

[0174] S3. Based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, perform flow field analysis on the front and rear wind turbines to determine the hollow area of ​​the blades of the front wind turbine that ensures no interference between the flow fields of the front and rear wind turbines.

[0175] S4, replace the blades in the hollow area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine, wherein the wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine.

[0176] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0177] Obviously, those skilled in the art should understand that the modules or steps of this application described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented here, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this application is not limited to any particular combination of hardware and software.

[0178] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this application should be included within the protection scope of this application.

Claims

1. A method for determining the structure of a wind turbine, characterized in that, The method includes: The first radius of the front rotor of the wind turbine is determined based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency. Based on a preset proportional relationship and the first radius, the initial second radius of the rear wind turbine of the wind turbine unit is determined, wherein the front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction; Flow field analysis is performed on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine to determine the hollowed-out region of the blades of the front wind turbine that ensures no flow field interference between the front and rear wind turbines. Geometric models of the front and rear wind turbines are constructed based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine. Preset wind field environmental conditions are simulated for the geometric models of the front and rear wind turbines to determine the airflow distribution between them. Based on the airflow distribution between the front and rear wind turbines, the interference region where flow field interference occurs between them is determined. The interference portion in the blades of the front wind turbine is determined based on the interference region, wherein the blades of the interference portion of the front wind turbine are used to generate a flow field within the interference region. The region where the blades of the interference portion of the front wind turbine are located is defined as the hollowed-out region. The blades in the hollowed-out area of ​​the front wind turbine are replaced with a hollow structure to obtain the target front wind turbine, wherein the wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine; A combined wind turbine model of the wind turbine unit is constructed based on the target front wind turbine and the rear wind turbine; a simulation experiment is conducted on the combined wind turbine model to determine the wind energy utilization efficiency of the combined wind turbine model; if the wind energy utilization efficiency of the combined wind turbine model is lower than the target wind energy utilization efficiency, the initial second radius of the rear wind turbine is adjusted until the wind energy utilization efficiency of the combined wind turbine model reaches the target wind energy utilization efficiency.

2. The method for determining the wind turbine structure according to claim 1, characterized in that, The method further includes: The minimum distance between the front and rear wind turbines is determined based on the dimensions of the generator and gearbox of the wind turbine unit and the required layout space, wherein the front and rear wind turbines are respectively located at both ends of the main shaft of the generator; Based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine, flow field analysis is performed on the front wind turbine and the rear wind turbine to determine the spacing range between the front wind turbine and the rear wind turbine such that the flow field interference between the front wind turbine and the rear wind turbine is lower than a preset range. The distance between the front impeller and the rear impeller is determined based on the distance range and the distance lower limit, wherein the distance between the front impeller and the rear impeller is greater than or equal to the distance lower limit.

3. The method for determining the wind turbine structure according to claim 1, characterized in that, The step of determining the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency includes: Obtain the rated wind speed at the location of the wind turbine unit and the rated power of the wind turbine unit; The first radius of the front rotor of the wind turbine unit is determined based on the rated wind speed, the rated power, the target wind energy utilization efficiency, and the air density.

4. The method for determining the wind turbine structure according to claim 1, characterized in that, The method further includes: During the operation of the wind turbine unit, the real-time wind energy utilization efficiency of the wind turbine unit is determined; If the real-time wind energy utilization efficiency is lower than the target wind energy utilization efficiency, the area of ​​the hollowed-out region of the blades of the front wind turbine is adjusted according to the current wind conditions to improve the wind energy utilization efficiency. The wind conditions include wind speed, risk, and turbulence intensity.

5. A device for determining the structure of a wind turbine, characterized in that, The device includes: The front rotor determination module is used to determine the first radius of the front rotor of the wind turbine unit based on the preset rated operating parameters of the wind turbine unit and the target wind energy utilization efficiency; The rear wind turbine determining module is used to determine the initial second radius of the rear wind turbine of the wind turbine unit according to a preset proportional relationship and the first radius, wherein the front wind turbine and the rear wind turbine of the wind turbine unit rotate coaxially, and the front wind turbine is located on the side of the rear wind turbine closer to the windward direction; A flow field determination module is used to perform flow field analysis on the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine to determine the hollowed-out region of the blades of the front wind turbine that ensures no flow field interference between the front and rear wind turbines; construct geometric models of the front and rear wind turbines based on the first radius of the front wind turbine and the initial second radius of the rear wind turbine; simulate preset wind field environmental conditions for the geometric models of the front and rear wind turbines to determine the distribution of airflow between the front and rear wind turbines; determine the interference region where flow field interference occurs between the front and rear wind turbines based on the distribution of airflow between the front and rear wind turbines; determine the interference portion in the blades of the front wind turbine based on the interference region, wherein the blades of the interference portion of the front wind turbine are used to generate a flow field within the interference region; and define the region where the blades of the interference portion of the front wind turbine are located as the hollowed-out region. The hollowing-out determination module is used to replace the blades in the hollowed-out area of ​​the front wind turbine with a hollow structure to obtain the target front wind turbine, wherein the wind turbine structure of the wind turbine unit includes the target front wind turbine and the rear wind turbine; construct a combined wind turbine model of the wind turbine unit based on the target front wind turbine and the rear wind turbine; conduct simulation experiments on the combined wind turbine model to determine the wind energy utilization efficiency of the combined wind turbine model; if the wind energy utilization efficiency of the combined wind turbine model is lower than the target wind energy utilization efficiency, adjust the initial second radius of the rear wind turbine until the wind energy utilization efficiency of the combined wind turbine model reaches the target wind energy utilization efficiency.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when executed, performs the method of any one of claims 1 to 4.

7. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the method of any one of claims 1 to 4 through the computer program.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 4.

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