Wind turbine wind tunnel model test method considering scale effect
By determining the geometric and wind scale ratio of the shrinkage model in the wind tunnel model test of the wind turbine, combined with the curve fitting method, the wind turbine performance measurement error caused by the scale effect is solved, and accurate real-scale wind performance data is provided, reducing the Test costs.
Patent Information
- Application Number
- CN202411323137.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2024-12-27
AI Technical Summary
Due to the scale effect in the wind turbine wind tunnel model test, the airflow effect affected by the shrinkage model does not match the real-scale wind turbine, resulting in the model measurement data that cannot reflect the real-scale wind turbine, affecting the design and optimization of the wind turbine.
By determining the geometric scale ratio and wind scale ratio, making a scale model and conducting tests in a wind tunnel, model wind power and power generation performance parameters are collected, and the real-scale wind power and power generation characteristic curves are obtained by using the curve fitting method, and externally obtaining the actual The performance parameters of the scale wind turbine ensure similar blade tip speed ratio.
It effectively solves the scale effect problem, provides real wind turbine wind performance data, reduces the uncertainty caused by numerical model simplification, and reduces the time and economic cost of wind tunnel model testing.
Smart Images
Figure CN119197987A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of wind power generation, and in particular to a wind turbine wind tunnel model test method taking scale effect into consideration. Background Art
[0002] As a clean and sustainable energy source, wind energy plays an increasingly important role in the world's energy structure today. In recent years, with the rapid development of the wind power industry, many new concepts and new forms of wind turbines have been designed continuously. The dynamic performance of wind turbines under different operating conditions is relatively complex. Therefore, it is of great significance to understand the wind characteristics of wind turbines before putting them into production and use to ensure the future safety and economy of wind turbines. Model testing is an important means to verify the feasibility, accuracy and safety of design schemes based on numerical simulation. By measuring the wind power and power generation performance parameters of wind turbines through wind tunnel model tests, model measurement data can be provided for the evaluation of wind performance of wind turbines with different structural forms, and a test basis can be provided for the optimization and finalization of the overall wind turbine scheme.
[0003] However, due to the limitation of wind tunnel size, the geometric dimensions of the scaled model often need to be 1-2 orders of magnitude smaller than those of the full-scale wind turbine. However, due to the wind speed range of the wind tunnel, the wind speed acting on the scaled model can only be at the same order of magnitude as the wind speed acting on the full-scale wind turbine. In this case, the Reynolds number in the wind tunnel model test will drop by several orders of magnitude, and the airflow effect on the scaled model will not match that of the full-scale wind turbine, resulting in the model measurement data of the wind tunnel model test being unable to reflect the actual wind performance of the full-scale wind turbine. This is called the scale effect problem. Summary of the invention
[0004] In view of the above problems and technical requirements, this application proposes a wind tunnel model test method for wind turbines that takes into account the scale effect. The technical solution of this application is as follows:
[0005] A wind tunnel model test method for a wind turbine considering scale effect comprises the following steps:
[0006] Determine the geometric scale ratio λ L , according to the geometric scale ratio λ L Making a scaled model of a full-scale wind turbine and installing the scaled model in a wind tunnel;
[0007] According to the actual scale working parameters of the actual scale wind turbine combined with the geometric scale ratio λ L , determine multiple groups of different test condition parameters under the condition that the tip speed ratio between the scaled model and the full-scale wind turbine is similar;
[0008] Carry out wind tunnel model tests on the scaled model according to each test condition parameter, determine the Reynolds number of the scaled model under the wind tunnel model test, and collect the model wind force and power generation performance parameters of the scaled model in the wind tunnel model test;
[0009] According to the relationship between the Reynolds number and the model wind power and power generation performance parameters in multiple wind tunnel model tests, the wind power and power generation characteristic curve of the full-scale wind turbine is obtained by using the curve fitting method. The wind power and power generation characteristic curve of the full-scale wind turbine indicates the wind power and power generation characteristic coefficients of the full-scale wind turbine at different Reynolds numbers.
[0010] The real-scale wind power and power generation performance parameters of the real-scale wind turbine under different real-scale working conditions are determined according to the wind power and power generation characteristic curve of the real-scale wind turbine.
[0011] A further technical solution is that the real-scale operating parameters of the real-scale wind turbine include the real-scale inflow wind speed V acting on the real-scale wind turbine under the real-scale operating condition. p and the real-scale impeller speed of the real-scale wind turbine ω p ; Each set of test condition parameters includes the model inflow wind speed V acting on the scaled model during the wind tunnel model test m and the model impeller speed ω of the scaled model m ; The tip speed ratio similarity condition between the scaled model and the full-scale wind turbine is TSR m :TSR p =1:1, the tip speed of the scaled model R m is the model impeller radius of the scaled model, and the real-scale tip speed of the real-scale wind turbine R p is the real-scale impeller radius of the real-scale wind turbine.
[0012] The wind tunnel model test is carried out on the scaled model according to each test condition parameter, including: using the wind tunnel to measure the model inflow wind speed V according to the test condition parameters; m Generate wind and control the impeller speed ω of the scaled model according to the test condition parameters m Rotate.
[0013] A further technical solution is to determine the parameters of each set of test conditions including:
[0014] Determine the wind speed scaling ratio λ of the test condition parameters V And determine the model inflow wind speed V in the test condition parameters m =V p ·λ V , the wind speed scaling ratio λ in each group of test parameters V are all different and the model inflow velocity V mAll are within the wind tunnel wind speed range;
[0015] According to the geometric scaling ratio λ L The wind speed scaling ratio λ of the test condition parameters V , under the condition of similar tip speed ratio, determine the impeller speed scale ratio of the test condition parameters And determine the model impeller speed ω in the test condition parameters m =ω p ·λ ω , the impeller speed scaling ratio λ in each group of test parameters ω are all different and the model impeller speed ω m All are within the model impeller speed range.
[0016] A further technical solution is to determine multiple wind speed scaling ratios in multiple groups of test condition parameters, including:
[0017] According to the real scale inflow wind speed V p and wind tunnel wind speed range [V m_min ,V m_max ] Determine the value range of wind speed scaling ratio as Several values of different wind speed scaling ratios are selected at equal intervals within the value range of the wind speed scaling ratio.
[0018] A further technical solution is to use a curve fitting method to obtain the wind force and power generation characteristic curve coefficients of a full-scale wind turbine, including:
[0019] According to the size parameters of the scaled model and the test condition parameters used in each wind tunnel model test, the collected model wind power and power generation performance parameters are dimensionally processed to obtain the wind power and power generation characteristic coefficients of the scaled model under the wind tunnel model test; the wind power and power generation characteristic coefficients of the scaled model are used to characterize the basic characteristics of the scaled model under the Reynolds number of the current wind tunnel model test and are independent of the test condition parameters and size parameters;
[0020] Based on the fact that the wind force and power generation characteristic coefficients of the full-scale wind turbine and the scaled model are the same under the same Reynolds number, the relationship between the Reynolds number and the wind force and power generation characteristic coefficients in multiple wind tunnel model tests is curve fitted to obtain the wind force and power generation characteristic curve of the full-scale wind turbine.
[0021] A further technical solution is to determine the real-scale wind power and power generation performance parameters of the real-scale wind turbine under any real-scale working condition according to the wind power and power generation characteristic curve of the real-scale wind turbine, including:
[0022] The wind force and power generation characteristic curve of the full-scale wind turbine is used to determine the wind force and power generation characteristic coefficient of the full-scale wind turbine at the Reynolds number corresponding to the current full-scale working condition;
[0023] According to the wind force and power generation characteristic coefficients of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating condition, combined with the full-scale operating condition parameters of the current full-scale operating condition, the full-scale wind force and power generation performance parameters of the full-scale wind turbine under the current full-scale operating condition are determined.
[0024] A further technical solution is that the model wind force and power generation performance parameters of the scaled model collected in each wind tunnel model test include: the aerodynamic load T measured by the load sensor installed at the bottom of the scaled model m , and the power generation P measured by the generator in the scaled model m ;
[0025] Obtain the wind force and power generation characteristic coefficients of the scaled model under the current wind tunnel model test, including the aerodynamic load coefficient and power factor ρ is the air density, A m is the impeller swept area of the scaled model.
[0026] A further technical solution is to determine the real-scale wind power and power generation performance parameters of the real-scale wind turbine under the current real-scale working conditions, including:
[0027] Determine the aerodynamic loads of a full-scale wind turbine under current full-scale operating conditions And power generation
[0028] Among them, A p is the swept area of the impeller of a full-scale wind turbine, is the aerodynamic load coefficient of the full-scale wind turbine at the Reynolds number corresponding to the current full-scale operating condition, It is the power generation coefficient of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating conditions.
[0029] A further technical solution is that the Reynolds number of the scaled model in any wind tunnel model test is The Reynolds number of a full-scale wind turbine under any full-scale operating condition is υ is the kinematic viscosity of the fluid, R m is the model impeller radius of the scaled model, R p is the real-scale impeller radius of the real-scale wind turbine.
[0030] A further technical solution is to determine the geometric scale ratio λ L The method comprises: determining the geometric scale ratio λ according to the size parameters of the full-scale wind turbine and the size of the wind tunnel based on the constraint that the scaled model can be completely placed in the wind tunnel and the blockage degree is less than a predetermined threshold value; L .
[0031] The beneficial technical effects of this application are:
[0032] The present application proposes a wind tunnel model test method for wind turbines that takes scale effect into consideration. By conducting a wind tunnel model test on a scaled model of a real-scale wind turbine, the model wind power and power generation performance parameters measured in the wind tunnel model test are extrapolated to obtain real-scale wind power and power generation performance parameters, thereby effectively solving the scale effect problem in the wind tunnel model test of wind turbines. The method can provide model measurement data for the evaluation of wind performance of wind turbines of different structural forms, and provide necessary correction data for the real-scale numerical simulation of wind turbines, thereby providing a test basis for the optimization and finalization of the overall wind turbine solution.
[0033] The prior art simulates a scaled model in numerical software, and then compares it with the wind tunnel model test results, verifies the accuracy of the numerical model with the idea of "model to model", and then uses the numerical model to calculate the real-scale results. In essence, it is a method of reverse verification of numerical calculations when the wind performance of the real-scale wind turbine is known. For newly designed real-scale wind turbines that have not yet been put into production, when the wind performance is unknown, the numerical calculation results will not be able to obtain the real wind performance of the real-scale wind turbine due to many uncertainties caused by the simplification of the simulation. Compared with the prior art, the wind turbine wind tunnel model test method of the present application does not need to refer to the wind performance of the real-scale wind turbine, but directly uses the measurement results of the wind tunnel model test to calculate the real-scale wind and power generation performance parameters, thereby reducing the uncertainty caused by the simplification of the numerical model, and can obtain the real wind performance of the newly designed real-scale wind turbine that has not yet been put into production.
[0034] Compared with the prior art which uses scaled models of real-scale wind turbines with multiple geometric scale ratios to conduct wind tunnel model tests to explore the influence of Reynolds number on the test results, the wind turbine wind tunnel model test method of the present application only needs to use a scaled model with one geometric scale ratio and has a clear process and simple operation. It reduces the number of processed models and the number of test conditions on the basis of solving the scale effect problem, and can reduce the time cost and economic cost of wind tunnel model tests. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 It is a flow chart of the wind turbine wind tunnel model test method.
[0036] Figure 2 This is a schematic diagram of the scaled model installation. DETAILED DESCRIPTION
[0037] The specific implementation of the present application is further described below in conjunction with the accompanying drawings.
[0038] This application proposes a wind turbine wind tunnel model test method that takes into account the scale effect. Please refer to Figure 1As shown in the flow chart, the specific steps of the wind turbine wind tunnel model test method are:
[0039] Step 1: Based on the constraint that the scaled model of the full-scale wind turbine can be completely placed in the wind tunnel and the blockage is less than a predetermined threshold, the geometric scale ratio is determined according to the size parameters of the full-scale wind turbine and the size of the wind tunnel. R m is the model impeller radius of the scaled model, R p is the real-scale impeller radius of the real-scale wind turbine. The predetermined threshold of the blockage degree can be customized according to the actual application scenario. In this application, the predetermined threshold of the blockage degree is set to 7%.
[0040] According to the geometric scale ratio λ L A scaled model of a full-scale wind turbine is made and installed in a wind tunnel. The specific installation method is as follows: Figure 2 The scaled model is installed on the lower wall of the wind tunnel through a load sensor, the model axis is flush with the wind tunnel axis, the impeller is connected to the generator through a bearing and placed in the fairing and installed on the tower, and a speed sensor is installed in the bearing to measure the speed of the model impeller of the scaled model.
[0041] Step 2: Based on the actual scale operating parameters of the actual scale wind turbine and the geometric scale ratio λ L , multiple groups of different test operating condition parameters are determined under the condition that the tip speed ratio between the scaled model and the full-scale wind turbine is similar.
[0042] In one embodiment, the real-scale operating parameters of the real-scale wind turbine include the real-scale inflow wind speed V acting on the real-scale wind turbine under the real-scale operating condition. p and the real-scale impeller speed of the real-scale wind turbine ω p The parameters of each test condition include the model inflow wind speed V acting on the scaled model during the wind tunnel model test. m and the model impeller speed ω of the scaled model m .
[0043] The wind performance of a wind turbine varies with the inflow wind speed and the impeller speed, and is greatly affected by the tip speed ratio. The tip speed ratio can comprehensively reflect the basic characteristics of a wind turbine, including the geometry, impeller speed, inflow wind speed, etc. Therefore, the tip speed ratio is an important parameter to maintain similarity between the scaled model and the full-scale wind turbine in the wind tunnel model test. The tip speed ratio similarity condition between the scaled model and the full-scale wind turbine is TSR. m :TSR p =1:1, the tip speed of the scaled model The real-scale blade tip speed of a real-scale wind turbine
[0044] In one embodiment, according to the real-scale inflow wind speed V p and wind tunnel wind speed range [V m_min ,V m_max ]Determine the wind speed scaling ratio λ V The value range is The wind speed scaling ratio λ V By selecting several different wind speed scaling ratios at equal intervals within the range of , and conducting wind tunnel model tests by selecting test variables in an evenly dispersed manner, it can ensure that the test results better reflect the actual situation. V Corresponding to a set of test condition parameters, determine the wind speed scaling ratio λ of the test condition parameters V And determine the model inflow wind speed V in the test condition parameters m =V p ·λ V , the wind speed scaling ratio λ in each group of test parameters V are all different and the model inflow velocity V m All of them are within the wind tunnel wind speed range.
[0045] According to the geometric scaling ratio λ L The wind speed scaling ratio λ of the test condition parameters V , under the condition of similar tip speed ratio, determine the impeller speed scale ratio of the test condition parameters And determine the model impeller speed ω in the test condition parameters m =ω p ·λ ω , the impeller speed scale ratio λ in each test condition ω are all different and the model impeller speed ω m All are within the model impeller speed range, the impeller speed ω m It is obtained by adjusting the load resistance of the generator in the wind tunnel. Too large or too small impeller speed cannot be achieved by adjusting the load resistance of the generator.
[0046] Step 3: Conduct wind tunnel model tests on the scaled model according to each test condition parameter, determine the Reynolds number of the scaled model under the wind tunnel model test, and collect model wind force and power generation performance parameters of the scaled model in the wind tunnel model test.
[0047] In one embodiment, performing a wind tunnel model test on the scaled model according to each test condition parameter includes: using a wind tunnel to test the model inflow wind speed V according to the test condition parameter. m Create wind, and control the voltage of the generator by adjusting the resistance value of the external variable resistance box, so as to control the impeller speed ω of the scaled model according to the test condition parameters m Rotate.
[0048] In order to satisfy the geometric scaling ratio λ L Under the conditions of constant and similar tip speed ratio, the wind speed scaling ratio λ of the test condition parameters V , determine the Reynolds number scaling ratio corresponding to any set of test parameters The Reynolds number of the scaled model in any wind tunnel model test is υ is the kinematic viscosity of the fluid.
[0049] Step 4, based on the relationship between the Reynolds number and the model wind power and power generation performance parameters in multiple wind tunnel model tests, a curve fitting method is used to obtain the wind power and power generation characteristic curve of the full-scale wind turbine. The wind power and power generation characteristic curve of the full-scale wind turbine indicates the characteristic coefficient of the full-scale wind turbine at different Reynolds numbers.
[0050] In one embodiment, the collected model wind power and power generation performance parameters are dimensionally processed according to the size parameters of the scaled model and the test condition parameters used in each wind tunnel model test to obtain the characteristic coefficients of the scaled model under the wind tunnel model test. The characteristic coefficients of the scaled model are used to characterize the basic characteristics of the scaled model under the Reynolds number of the current wind tunnel model test and are independent of the test condition parameters and size parameters. Through dimensionless processing, the influence of the test condition parameters and size parameters is eliminated, so that the wind power and power generation characteristic coefficients are only related to the Reynolds number. Based on this, it can be ensured that the wind power and power generation characteristic coefficients of the real-scale wind turbine and the scaled model are the same under the same Reynolds number.
[0051] In one embodiment, the model wind and power generation performance parameters include aerodynamic loads T m And the power generation P m The load sensor installed at the bottom of the scaled model is used to measure the aerodynamic load T under the Reynolds number corresponding to the test condition parameters used in each wind tunnel model test. m , and the generator in the scaled model is used to measure the power generation P under the Reynolds number corresponding to the test condition parameters used in each wind tunnel model test m .
[0052] The wind force and power generation characteristic coefficients of the scaled model under the current wind tunnel model test are obtained by dimensionless processing, including the aerodynamic load coefficient and power factor ρ is the air density, A m is the impeller swept area of the scaled model.
[0053] Based on the fact that the wind force and power generation characteristic coefficients of the full-scale wind turbine and the scaled model are the same at the same Reynolds number, the relationship between the Reynolds number and the characteristic coefficient in multiple wind tunnel model tests is curve fitted to obtain the wind force and power generation characteristic curve of the full-scale wind turbine. The curve fitting method used in this application is the least squares method, which is a prior art and will not be described in detail in this application.
[0054] Step 5, determining the real-scale wind power and power generation performance parameters of the real-scale wind turbine under different real-scale working conditions according to the wind power and power generation characteristic curve of the real-scale wind turbine.
[0055] In one embodiment, the wind force and power generation characteristic curve of the full-scale wind turbine is used to determine the wind force and power generation characteristic coefficient of the full-scale wind turbine at the Reynolds number corresponding to the current full-scale working condition.
[0056] According to the wind force and power generation characteristic coefficients of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating condition, combined with the full-scale operating condition parameters of the current full-scale operating condition, the full-scale wind force and power generation performance parameters of the full-scale wind turbine under the current full-scale operating condition are determined.
[0057] In one embodiment, the Reynolds number of the full-scale wind turbine under the current full-scale working condition is According to the aerodynamic load factor C T and power factor C P , determine the aerodynamic load of the full-scale wind turbine under the current full-scale operating conditions And power generation Among them, A p is the swept area of the impeller of a full-scale wind turbine, is the aerodynamic load coefficient of the full-scale wind turbine at the Reynolds number corresponding to the current full-scale operating condition, It is the power generation coefficient of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating conditions.
[0058] The above is only a preferred embodiment of the present application, and the present application is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present application should be considered to be included in the protection scope of the present application.
Claims
1. A wind turbine wind tunnel model test method considering scale effect, characterized in that: The wind turbine wind tunnel model test method comprises: Determine the geometric scale ratio λ L , according to the geometric scaling ratio λ L Producing a scaled model of a full-scale wind turbine and installing the scaled model in a wind tunnel; According to the actual scale working parameters of the actual scale wind turbine combined with the geometric scale ratio λ L , determine multiple groups of different test condition parameters under the condition that the tip speed ratio between the scaled model and the full-scale wind turbine is similar; Conducting a wind tunnel model test on the scaled model according to each test condition parameter, determining the Reynolds number of the scaled model under the wind tunnel model test, and collecting model wind force and power generation performance parameters of the scaled model in the wind tunnel model test; According to the relationship between the Reynolds number and the model performance parameters in multiple wind tunnel model tests, the wind force and power generation characteristic curve of the full-scale wind turbine is obtained by using the curve fitting method. The characteristic curve of the full-scale wind turbine indicates the wind force and power generation characteristic coefficients of the full-scale wind turbine at different Reynolds numbers. The real-scale wind power and power generation performance parameters of the real-scale wind turbine under different real-scale working conditions are determined according to the wind power and power generation characteristic curve of the real-scale wind turbine.
2. The wind turbine wind tunnel model test method according to claim 1, characterized in that: The real-scale operating parameters of the real-scale wind turbine include the real-scale inflow wind speed V acting on the real-scale wind turbine under the real-scale operating condition. p and the real-scale impeller speed of the real-scale wind turbine ω p ; Each set of test condition parameters includes the model inflow wind speed V acting on the scaled model during the wind tunnel model test m and the model impeller speed ω of the scaled model m ; The tip speed ratio similarity condition between the scaled model and the full-scale wind turbine is TSR m :TSR p =1:1, the tip speed of the scaled model R m is the model impeller radius of the scaled model, and the real-scale tip speed of the real-scale wind turbine R p is the real-scale impeller radius of the real-scale wind turbine. The wind tunnel model test of the scaled model according to each test condition parameter comprises: using a wind tunnel to test the model inflow wind speed V according to the test condition parameter. m Generate wind, and control the model impeller speed ω of the scaled model according to the test condition parameters m Rotate.
3. The wind turbine wind tunnel model test method according to claim 2, characterized in that: Determine the parameters of each test condition including: Determine the wind speed scaling ratio λ of the test condition parameters V And determine the model inflow wind speed V in the test condition parameters m =V p ·λ V , the wind speed scaling ratio λ in each group of test parameters V are all different and the model inflow velocity V m All are within the wind tunnel wind speed range; According to the geometric scaling ratio λ L and the wind speed scale ratio λ of the test condition parameters V , under the condition of similar tip speed ratio, determine the impeller speed scale ratio of the test condition parameters And determine the model impeller speed ω in the test condition parameters m =ω p ·λ ω , the impeller speed scaling ratio λ in each group of test parameters ω are all different and the model impeller speed ω m All are within the model impeller speed range.
4. The wind turbine wind tunnel model test method according to claim 3, characterized in that: Determining multiple wind speed scaling ratios in multiple groups of test condition parameters includes: According to the real scale inflow wind speed V p and wind tunnel wind speed range [V m_min ,V m_max ] Determine the value range of wind speed scaling ratio as Several values of different wind speed scaling ratios are selected at equal intervals within the value range of the wind speed scaling ratio.
5. The wind turbine wind tunnel model test method according to claim 2, characterized in that: The wind force and power generation characteristic curve coefficients of the full-scale wind turbine obtained by curve fitting method include: The collected model wind power and power generation performance parameters are dimensionally processed according to the size parameters of the scaled model and the test condition parameters used in each wind tunnel model test to obtain the wind power and power generation characteristic coefficients of the scaled model under the wind tunnel model test; the wind power and power generation characteristic coefficients of the scaled model are used to characterize the basic characteristics of the scaled model under the Reynolds number of the current wind tunnel model test and are independent of the test condition parameters and the size parameters; Based on the fact that the wind force and power generation characteristic coefficients of the full-scale wind turbine and the scaled model are the same under the same Reynolds number, the relationship between the Reynolds number and the wind force and power generation characteristic coefficients in multiple wind tunnel model tests is curve fitted to obtain the wind force and power generation characteristic curve of the full-scale wind turbine.
6. The wind turbine wind tunnel model test method according to claim 5, characterized in that: Determining the real-scale wind power and power generation performance parameters of the real-scale wind turbine under any real-scale working condition according to the wind power and power generation characteristic curve of the real-scale wind turbine includes: Determine the wind force and power generation characteristic coefficient of the real-scale wind turbine at the Reynolds number corresponding to the current real-scale working condition by using the wind force and power generation characteristic curve of the real-scale wind turbine; According to the wind force and power generation characteristic coefficients of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating condition, combined with the full-scale operating condition parameters of the current full-scale operating condition, the full-scale wind force and power generation performance parameters of the full-scale wind turbine under the current full-scale operating condition are determined.
7. The wind turbine wind tunnel model test method according to claim 6, characterized in that: The model wind force and power generation performance parameters of the scaled model collected in each wind tunnel model test include: the aerodynamic load T measured by the load sensor installed at the bottom of the scaled model; m , and the power generation power P measured by the generator in the scaled model m ; Obtain the wind force and power generation characteristic coefficients of the scaled model under the current wind tunnel model test, including the aerodynamic load coefficient and power factor ρ is the air density, A m is the impeller swept area of the scaled model.
8. The wind turbine wind tunnel model test method according to claim 7, characterized in that: Determine the full-scale wind power and power generation performance parameters of the full-scale wind turbine under the current full-scale operating conditions include: Determine the aerodynamic loads of a full-scale wind turbine under current full-scale operating conditions And power generation Among them, A p is the swept area of the impeller of a full-scale wind turbine, is the aerodynamic load coefficient of the full-scale wind turbine at the Reynolds number corresponding to the current full-scale operating condition, It is the power generation coefficient of the full-scale wind turbine under the Reynolds number corresponding to the current full-scale operating conditions.
9. The wind turbine wind tunnel model test method according to claim 2, characterized in that: The Reynolds number of the scaled model in any wind tunnel model test is The Reynolds number of a full-scale wind turbine under any full-scale operating condition is υ is the kinematic viscosity of the fluid, R m is the model impeller radius of the scaled model, R p is the real-scale impeller radius of the real-scale wind turbine.
10. The wind turbine wind tunnel model test method according to claim 1, characterized in that: Determine the geometric scale ratio λ L The method comprises: determining the geometric scale ratio λ according to the size parameters of the full-scale wind turbine and the size of the wind tunnel based on the constraint that the scaled model can be completely placed in the wind tunnel and the blockage degree is less than a predetermined threshold value; L .