CN113933016A - Wind tunnel test device and method for simulating floating type wind turbine generator movement response - Google Patents
Wind tunnel test device and method for simulating floating type wind turbine generator movement response Download PDFInfo
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Abstract
The invention discloses a wind tunnel test device and a method for simulating floating type wind turbine generator movement response, which adopt a semi-physical simulation technology combining physical measurement and numerical simulation, solve the problems of simulating hydrodynamic load and mooring restoring force action in a wind tunnel environment, and provide a test parameter scale ratio system decoupling a wind speed scale ratio and a length scale ratio based on a data transmission path of scale model measurement and full-size model numerical simulation, wherein the scale ratio system can ensure the similarity of the feasibility of the test conditions of the scale model and the simulated physical problems.
Description
Technical Field
The invention belongs to the technical field of wind turbine generators, relates to a wind tunnel test method and a wind tunnel test device, and particularly relates to a wind tunnel test device and a wind tunnel test method for simulating floating type wind turbine generator motion response.
Background
The floating wind turbine generator does not need to be installed on a large supporting structure of a seabed, has remarkable technical economy in deep and far sea, and is a main solution for developing wind energy resources in deep and far sea. However, a series of new technical challenges still exist in the existing floating wind turbine generator, for example, the floating wind turbine generator can generate six-degree-of-freedom motion in the operation process, the motion response rule and mechanism are very complex, the floating wind turbine generator generates motion response under the action of pneumatic load, hydrodynamic load, mooring restoring force and active control, and the motion of the floating wind turbine generator can influence the magnitude of the pneumatic load, hydrodynamic load and mooring restoring force, so that the dynamic problem of motion and load bidirectional coupling evolution is solved. The aerodynamic load and the hydrodynamic load show obvious nonlinearity in the dynamic evolution process, and a satisfactory prediction result is difficult to obtain by an analytic method. Therefore, the floating wind turbine generator movement response test method has an important support effect on the floating wind turbine generator technology development.
The floating wind turbine generator set full-size test is high in cost and uncontrollable in test condition, and the scaling model test is a feasible way for developing relevant basic research. At present, most floating type wind turbine generator model tests are carried out in a water pool, the problems of low wind field quality and insufficient aerodynamic simulation exist, and a test method for carrying out floating type wind turbine generator motion response in a high-quality wind tunnel is relatively lacked. Meanwhile, the water pool test needs to meet the Fr number (representing the ratio of inertia force to gravity) similarity criterion, the scale ratio of the flow speed can be expanded to a full-size unit only by the scale model test result, the Fr number similarity requires that the scale ratio of the flow speed is the square of the length scale ratio, and the flow speed scale ratio and the length scale ratio are mutually coupled to limit, so that the wind speed and the wave speed of the scale model test are far smaller than those of the full-size unit, and the test wind speed and the wave speed conditions are difficult to realize accurate control.
Disclosure of Invention
In order to solve the problems, the invention provides a wind tunnel test device and a method for simulating the movement response of a floating wind turbine generator, firstly, a semi-physical simulation technology combining physical measurement and numerical simulation is adopted, the problems of simulating hydrodynamic load and mooring restoring force action in a wind tunnel environment are solved, secondly, a test parameter scale ratio system decoupling a wind speed scale ratio and a length scale ratio is provided based on a data transmission path of scale model measurement and full-size model numerical simulation, and the scale ratio system simultaneously guarantees the feasibility of the test conditions of the scale model and the similarity of the simulated physical problems.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a wind tunnel test device for simulating the floating wind turbine generator movement response at least comprises a wind tunnel, a scaling wind turbine generator, a six-component force sensor, a six-degree-of-freedom attitude sensor of the wind turbine generator, a six-degree-of-freedom movement platform and a real-time controller,
the scaling wind turbine generator, the six-component force sensor and the six-degree-of-freedom motion platform are arranged in the wind tunnel, the scaling wind turbine generator is arranged on the upper end face of the six-component force sensor, and the lower end face of the six-component force sensor is arranged on the six-degree-of-freedom motion platform;
the six-degree-of-freedom motion platform is used for providing six-degree-of-freedom motion support for the scaling wind turbine generator and simulating six-degree-of-freedom motion response of the floating wind turbine generator in the sea,
the scaling wind turbine generator is designed according to the principle of similar performance with a full-size wind turbine generator, so that the power coefficient and the thrust coefficient of the scaling wind turbine generator and the full-size wind turbine generator are consistent with the tip speed ratio change rule;
the six-component force sensor is used for measuring aerodynamic loads of the scaling wind turbine generator in a wind tunnel environment, and comprises aerodynamic forces in three directions of transverse oscillation, longitudinal oscillation and vertical oscillation and aerodynamic moments in three directions of transverse oscillation, longitudinal oscillation and yawing oscillation;
the six-degree-of-freedom attitude sensor of the set is used for measuring attitude change of the scaling wind turbine set in the wind tunnel test process, and comprises three linear degrees of freedom of swaying, surging and heaving and three angular degrees of freedom of swaying, surging and yawing;
the real-time controller comprises a unit control module, a data acquisition module, a data processing module and a floating body platform motion control module, wherein,
the unit control module is in communication connection with the scaling wind turbine and is used for controlling operating parameters such as the rotating speed of the scaling wind turbine and the like;
the data acquisition module is in communication connection with a scaling wind turbine generator, a six-component force sensor and a six-degree-of-freedom attitude sensor of the generator and respectively acquires operating parameters such as the rotating speed of the scaling wind turbine generator, a six-component pneumatic load and a six-degree-of-freedom attitude;
the data processing module is in communication connection with the data acquisition module and comprises a similarity law conversion unit and a hydrodynamic real-time simulation unit which are in communication connection, the similarity law conversion unit is used for converting the six-component pneumatic load of the scaled wind turbine generator actually measured and acquired by the data acquisition module into the six-component pneumatic load of the full-size wind turbine generator according to the scaled system through a similarity law, and the six-component pneumatic load data of the full-size wind turbine generator set obtained by conversion is sent to the hydrodynamic real-time simulation unit, the hydrodynamic real-time simulation unit is used for solving a dynamic equation of the floating wind turbine generator on a full-size wind turbine generator model to obtain the motion displacement and speed of the floating body, the calculated movement displacement and speed of the floating body are transmitted to the similarity law conversion unit, and the similarity law conversion unit converts the movement displacement and speed of the floating body into the movement displacement and speed of the scaled wind turbine generator according to the scaled system through a similarity law;
the floating body platform motion control module is respectively in communication connection with the data processing module and the six-degree-of-freedom motion platform, the data processing module transmits the motion displacement and the speed of the scaling wind turbine generator, which are obtained through conversion by the similarity law conversion unit, to the floating body platform motion control module, and the floating body platform motion control module converts the motion displacement and the speed of the scaling wind turbine generator into control instructions and transmits the control instructions to the six-degree-of-freedom platform, so that the six-degree-of-freedom platform is controlled to move according to the motion displacement and the speed of the scaling wind turbine generator, which are obtained through the data processing module.
In the wind tunnel test device for simulating the movement response of the floating wind turbine, the wind tunnel, the scaling wind turbine and the six-component force sensor are used for measuring the pneumatic load borne by the scaling wind turbine, the real-time controller is used for calculating the hydrodynamic load and the movement response of the floating wind turbine through real-time simulation, and the six-degree-of-freedom movement platform is used for driving the scaling wind turbine to move according to the movement response rule of the simulation calculation.
Preferably, the six-degree-of-freedom motion platform can be driven by a motor or hydraulic power.
According to the technical scheme, the pneumatic load of the scaled wind turbine generator is converted through the similarity law of the scaled system to obtain the pneumatic load of the full-scale wind turbine generator, the motion response is solved in the full-scale wind turbine generator model, and finally the motion response of the scaled wind turbine generator is obtained through the similarity law of the scaled system. The hydrodynamic solution in the whole process is developed aiming at a full-size model, so that the Fr number similarity problem is not involved, and the similarity problem of the pneumatic load and the motion parameter of the scaled wind turbine generator is involved, so that the flow speed scaling ratio and the length scaling ratio can be set in a decoupling mode, and the wind speed of the wind tunnel test of the scaled wind turbine generator can be in a feasible range.
Through dimensional analysis, the scale ratio system provided by the invention comprises the following components:
on the basis of the wind tunnel test device and the scale ratio system, the invention also provides a wind tunnel test method for simulating the floating wind turbine generator movement response based on the wind tunnel test device, which is characterized by at least comprising the following steps:
setting SS1 initial parameters including wind tunnel wind speed, scaling wind turbine generator set rotation speed and other operation parameters, test duration and control time step length, and starting the wind tunnel and scaling wind turbine generator set according to preset parameters until the operation state is stable;
the method comprises the steps that the pneumatic load of the SS2 floating type wind turbine generator is measured in real time, and a data acquisition module of a real-time controller reads six-component pneumatic load data of a six-component force sensor in real time;
SS3 floating type wind turbine generator movement response real-time simulation, the data acquisition module transmits the acquired and read six-component pneumatic load data to the data processing module, the data processing module converts the six-component pneumatic load data obtained by the data acquisition module into six-component pneumatic load of a full-size wind turbine generator according to a reduced scale ratio and through a similarity law, and transmits the converted six-component pneumatic load data of the full-size wind turbine generator to the hydrodynamic real-time simulation unit, a full-size wind turbine generator dynamics model equation is constructed in the hydrodynamic real-time simulation unit, the full-size wind turbine generator dynamics model is solved to obtain full-size turbine generator floating body movement displacement and speed, then the calculated floating body movement displacement and speed are transmitted to the similarity law conversion unit, and the similarity law conversion unit converts the floating body movement displacement and speed according to a similarity law through the reduced scale ratio system again, obtaining the displacement and the speed of the scaling wind turbine;
the SS4 data processing module transmits the motion displacement and speed of the scaling wind turbine generator converted by the similarity law conversion unit to the floating body platform motion control module, the floating body platform motion control module converts the motion displacement and speed of the scaling wind turbine generator into control instructions and transmits the control instructions to the six-degree-of-freedom platform, the six-degree-of-freedom platform is controlled to move according to real-time simulation results, the steps SS2 and SS3 are sequentially repeated until the preset test duration is reached, the scaling wind turbine generator stops rotating, the wind tunnel is closed, and the full-size wind turbine generator motion response time course is obtained.
Preferably, the full-scale wind turbine generator dynamics model equation in the hydrodynamic real-time simulation unit includes the hydrostatic stiffness, the additional mass, the radiation damping, the wave period, the incident angle and the wave force coefficient of the full-scale floating wind turbine generator.
Preferably, the hydrodynamic real-time simulation unit adopts an open-source HydroDyn program or commercial software as a machine set dynamics model equation solver to solve in real time.
Preferably, the hydrodynamic real-time simulation unit adopts off-line pre-calculation and on-line table look-up fitting methods, so that the real-time calculation speed and the real-time control precision are improved.
Compared with the prior art, the wind tunnel test device and method for simulating the floating wind turbine generator movement response, provided by the invention, adopt a semi-physical simulation technology combining physical measurement and numerical simulation, solve the problems of simulating hydrodynamic load and mooring restoring force action in a wind tunnel environment, and provide a test parameter scale ratio system for decoupling a wind speed scale ratio and a length scale ratio based on a data transmission path of scale model measurement and full-size model numerical simulation, wherein the scale ratio system can ensure the feasibility of scale model test conditions and the similarity of simulated physical problems.
Drawings
FIG. 1 is a schematic diagram of a wind tunnel test device for simulating a floating wind turbine generator movement response;
FIG. 2 shows data transmission and scaling application processes of a floating wind turbine generator motion response wind tunnel test;
wherein the reference numerals have the following meanings:
the wind power generation system comprises a wind tunnel 1, a scaling wind turbine generator 2, a six-component force sensor 3, a six-degree-of-freedom attitude sensor of a machine set 4, a six-degree-of-freedom motion platform 5 and a real-time controller 6.
Detailed Description
In order to make the purpose and technical solution of the present invention more apparent, the following detailed description of the present invention will be made with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments, which are part of the present invention, are not all embodiments, and are intended to be illustrative of the present invention and should not be construed as limiting the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a wind tunnel test device for simulating the motion response of a floating wind turbine generator, which is shown in figure 1 and comprises a wind tunnel 1, a scaling wind turbine generator 2, a six-component force sensor 3, a generator six-degree-of-freedom attitude sensor 4, a six-degree-of-freedom motion platform 5 and a real-time controller 6, wherein the scaling wind turbine generator 2, the six-component force sensor 3 and the six-degree-of-freedom motion platform 5 are arranged in the wind tunnel 1, the scaling wind turbine generator 2 and the six-component force sensor 3 are used for measuring the pneumatic load borne by the scaling wind turbine generator 2, the real-time controller 6 is used for calculating the hydrodynamic load and the motion response of the floating wind turbine generator through real-time simulation, and the six-degree-of freedom motion platform 5 is used for driving the scaling wind turbine generator to move according to the motion response rule of the simulation calculation.
The scaling wind turbine generator 2 is designed according to the similar performance with the full-size wind turbine generator, and the power coefficient and the thrust coefficient of the scaling wind turbine generator and the full-size wind turbine generator are consistent with the change rule of the tip speed ratio.
The scaling wind turbine generator set 2 is arranged on the upper end face of the six-component force sensor 3, and the lower end face of the six-component force sensor 3 is arranged on the six-degree-of-freedom motion platform 5.
The six-component force sensor 3 is used for measuring aerodynamic loads of the scaling wind turbine generator 2 in a wind tunnel environment, and comprises aerodynamic forces in three directions of swaying, surging and heaving and aerodynamic moments in three directions of swaying, pitching and yawing.
The six-degree-of-freedom attitude sensor 4 of the wind turbine generator set is used for measuring attitude changes of the scaling wind turbine generator set 2 in the test process, and comprises three linear degrees of freedom, namely, sway, surge and heave, and three angular degrees of freedom, namely, roll, pitch and yaw.
The six-degree-of-freedom motion platform 5 provides six-degree-of-freedom motion support for the scaling wind turbine generator 2, six-degree-of-freedom motion response of the floating wind turbine generator in the sea is simulated, and the six-degree-of-freedom motion platform 5 is driven by a motor.
The real-time controller 6 comprises a unit control module, a data acquisition module, a data processing module and a floating body platform motion control module. The unit control module is in communication connection with the scaling wind turbine and is used for controlling operating parameters such as the rotating speed of the scaling wind turbine 2; the data acquisition module is in communication connection with the scaling wind turbine generator 2, the six-component force sensor 3 and the six-degree-of-freedom attitude sensor 4 of the generator, and respectively acquires operating parameters such as the rotating speed of the scaling wind turbine generator 2, six-component pneumatic load and six-degree-of-freedom attitude of the scaling wind turbine generator 2; the data processing module is in communication connection with the data acquisition module and comprises a similarity law conversion unit and a hydrodynamic real-time simulation unit, the similarity law conversion unit is used for converting the actually measured six-component pneumatic load of the scaling wind turbine generator 2 into the six-component pneumatic load of the full-size wind turbine generator through a similarity law according to a scaling system, the hydrodynamic real-time simulation unit is used for solving a dynamic equation of the floating wind turbine generator on a full-size turbine generator model to obtain the movement displacement and speed of the floating body, and transmitting the calculated movement displacement and speed of the floating body to the similarity law conversion unit, so that the movement displacement and speed of the scaling wind turbine generator are converted into the movement displacement and speed of the scaling wind turbine generator through the similarity law again; the floating body platform motion control module is respectively in communication connection with the data processing module and the six-degree-of-freedom motion platform, the data processing module transmits the motion displacement and the speed of the scaling wind turbine generator converted by the similarity law conversion unit to the floating body platform motion control module, and the floating body platform motion control module converts the motion displacement and the speed of the scaling wind turbine generator into control instructions and transmits the control instructions to the six-degree-of-freedom platform to control the six-degree-of-freedom platform to move according to the motion displacement and the speed of the scaling wind turbine generator obtained by the data processing module.
The scale ratio system provided by the invention comprises the following components:
on the basis of the wind tunnel test device and the scale ratio system, the invention also provides a wind tunnel test method for simulating the floating wind turbine generator movement response based on the wind tunnel test device, which is described by specific embodiments:
1 initial parameter setting, taking NREL 5MW DeepCwind semi-submersible unit as full-size prototype unit, and impeller diameter Df126m, and the diameter D of the wind turbine impeller is reduced under the wind tunnel size limitation conditionm1m, thereby determining a length reduction ratio of
At wind speed VfSetting the wind speed of the wind tunnel as V under the condition that 8m/s is the test wind conditionmAt 8m/s, the speed reduction ratio is
According to the similarity of tip speed ratios, the rotating speed of the scaling wind turbine generator is determined to be 1000r/min, the test time length is 10min, and the control time step length is 0.1s, and the wind tunnel and the scaling wind turbine generator are started until the running state is stable.
2, the pneumatic load of the floating wind turbine generator is measured in real time, and a data acquisition module of the real-time controller reads pneumatic load data from the six-component force sensor.
3, simulating the motion response of the floating wind turbine generator in real time, wherein the data transmission process is as shown in figure 2, and acquiring the pneumatic load data f by the data acquisition moduleaeroConversion into pneumatic load of full-scale unit according to reduced-scale ratio
Establishing a full-size unit dynamic model equation in a HydroDyn hydrodynamic simulation module, including the hydrostatic stiffness, the additional mass, the radiation damping, the wave period, the incident angle and the wave force coefficient of a full-size floating wind turbine unit, solving a dynamic model, and calculating to obtain the movement position of a full-size unit floating bodyShift P and speed P&And obtaining the motion displacement P of the scaled wind turbine generator as P/lambda through scaling ratio transformation againlAnd velocity p&＝P&/λv。
And the SS4 controls the six-degree-of-freedom platform to move according to the real-time simulation result, and when the next time step is reached, the steps SS2 and SS3 are sequentially repeated until the preset test time duration is 10min, the scaling wind turbine stops rotating, the wind tunnel is closed, and the full-size wind turbine motion response time course is obtained.
The above description is only an example of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A wind tunnel test device for simulating the floating wind turbine generator movement response at least comprises a wind tunnel, a scaling wind turbine generator, a six-component force sensor, a six-degree-of-freedom attitude sensor of the wind turbine generator, a six-degree-of-freedom movement platform and a real-time controller,
the scaling wind turbine generator, the six-component force sensor and the six-degree-of-freedom motion platform are arranged in the wind tunnel, the scaling wind turbine generator is arranged on the upper end face of the six-component force sensor, and the lower end face of the six-component force sensor is arranged on the six-degree-of-freedom motion platform;
the six-degree-of-freedom motion platform is used for providing six-degree-of-freedom motion support for the scaling wind turbine generator and simulating six-degree-of-freedom motion response of the floating wind turbine generator in the sea,
the scaling wind turbine generator is designed according to the principle of similar performance with a full-size wind turbine generator, so that the power coefficient and the thrust coefficient of the scaling wind turbine generator and the full-size wind turbine generator are consistent with the tip speed ratio change rule;
the six-component force sensor is used for measuring aerodynamic loads of the scaling wind turbine generator in a wind tunnel environment, and comprises aerodynamic forces in three directions of swaying, surging and heaving and aerodynamic moments in three directions of swaying, surging and heaving;
the six-degree-of-freedom attitude sensor of the set is used for measuring attitude change of the scaling wind turbine set in the wind tunnel test process, and comprises three linear degrees of freedom of swaying, surging and heaving and three angular degrees of freedom of swaying, surging and yawing;
the real-time controller comprises a unit control module, a data acquisition module, a data processing module and a floating body platform motion control module, wherein,
the unit control module is in communication connection with the scaling wind turbine and is used for controlling operating parameters such as the rotating speed of the scaling wind turbine and the like;
the data acquisition module is in communication connection with a scaling wind turbine generator, a six-component force sensor and a six-degree-of-freedom attitude sensor of the generator and respectively acquires operating parameters such as the rotating speed of the scaling wind turbine generator, a six-component pneumatic load and a six-degree-of-freedom attitude;
the data processing module is in communication connection with the data acquisition module and comprises a similarity law conversion unit and a hydrodynamic real-time simulation unit which are in communication connection, the similarity law conversion unit is used for converting the six-component pneumatic load of the scaled wind turbine generator actually measured and acquired by the data acquisition module into the six-component pneumatic load of the full-size wind turbine generator according to the scaled system through a similarity law, and the six-component pneumatic load data of the full-size wind turbine generator set obtained by conversion is sent to the hydrodynamic real-time simulation unit, the hydrodynamic real-time simulation unit is used for solving a dynamic equation of the floating wind turbine generator on a full-size wind turbine generator model to obtain the motion displacement and speed of the floating body, the calculated movement displacement and speed of the floating body are transmitted to the similarity law conversion unit, and the similarity law conversion unit converts the movement displacement and speed of the floating body into the movement displacement and speed of the scaled wind turbine generator according to the scaled system through a similarity law;
the floating body platform motion control module is respectively in communication connection with the data processing module and the six-degree-of-freedom motion platform, the data processing module transmits the motion displacement and the speed of the scaling wind turbine generator, which are obtained through conversion by the similarity law conversion unit, to the floating body platform motion control module, and the floating body platform motion control module converts the motion displacement and the speed of the scaling wind turbine generator into control instructions and transmits the control instructions to the six-degree-of-freedom platform, so that the six-degree-of-freedom platform is controlled to move according to the motion displacement and the speed of the scaling wind turbine generator, which are obtained through the data processing module.
2. The wind tunnel test device of claim 1, wherein the six degree of freedom motion platform is driven by an electric motor or hydraulic power.
3. The wind tunnel test device of claim 1, wherein each physical quantity scaling ratio is:
4. a wind tunnel test method for simulating floating wind turbine generator movement response based on the wind tunnel test device of the preceding claims is characterized by at least comprising the following steps:
SS1, setting initial parameters including operation parameters such as wind tunnel wind speed, scaling wind turbine generator rotating speed and the like, test duration and control time step length, and starting the wind tunnel and the scaling wind turbine generator according to preset parameters until the operation state is stable;
SS2, the pneumatic load of the floating wind turbine generator is measured in real time, and a data acquisition module of a real-time controller reads six-component pneumatic load data of a six-component force sensor in real time;
SS3, the floating wind turbine generator motion response real-time simulation, the data acquisition module transmits the acquired and read six-component pneumatic load data to the data processing module, the data processing module converts the six-component pneumatic load data obtained by the data acquisition module into six-component pneumatic load of the full-size wind turbine generator according to a reduced scale ratio and through a similarity law, and transmits the converted six-component pneumatic load data of the full-size wind turbine generator to the hydrodynamic real-time simulation unit, a full-size wind turbine generator dynamic model equation is constructed in the hydrodynamic real-time simulation unit, the full-size wind turbine generator dynamic model is solved to obtain full-size turbine generator floating body motion displacement and speed, then the calculated floating body motion displacement and speed are transmitted to the similarity law conversion unit, and the similarity law conversion unit converts the floating body motion displacement and speed according to a similarity law through the reduced scale ratio system again, obtaining the displacement and the speed of the scaling wind turbine;
and SS4, the motion displacement and the speed of the scaling wind turbine generator, which are obtained by converting the similarity law conversion unit, are transmitted to the floating body platform motion control module by the data processing module, the motion displacement and the speed of the scaling wind turbine generator, which are obtained by converting the similarity law conversion unit, are converted into control instructions by the floating body platform motion control module and are transmitted to the six-degree-of-freedom platform, the six-degree-of-freedom platform is controlled to move according to a real-time simulation result, the steps SS2 and SS3 are sequentially repeated until a preset test duration is reached, the scaling wind turbine generator stops rotating, the wind tunnel is closed, and a full-size wind turbine generator motion response time course is obtained.
5. The wind tunnel test method according to claim 4, wherein the hydrodynamic simulation module uses an open-source HydroDyn program or commercial software as a unit dynamics model equation solver for real-time solution.
6. The wind tunnel test method according to claim 4, wherein the hydrodynamic simulation module adopts off-line pre-calculation and on-line table look-up fitting methods to improve real-time calculation speed and real-time control accuracy.
7. The wind tunnel test method according to claim 4, wherein the full-scale wind turbine generator dynamics model equation in the hydrodynamic real-time simulation unit comprises the hydrostatic stiffness, the additional mass, the radiation damping, the wave period, the incident angle and the wave force coefficient of the full-scale floating wind turbine generator.
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| CN117740307B (en) * | 2024-02-18 | 2024-05-14 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for predicting performance of full-size rotor wing |
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