CN115405473A - Visual testing method and device for surface turbulence of wind turbine generator blade - Google Patents
Visual testing method and device for surface turbulence of wind turbine generator blade Download PDFInfo
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- CN115405473A CN115405473A CN202210989981.1A CN202210989981A CN115405473A CN 115405473 A CN115405473 A CN 115405473A CN 202210989981 A CN202210989981 A CN 202210989981A CN 115405473 A CN115405473 A CN 115405473A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a visual testing method and a visual testing device for surface turbulence of a wind turbine blade, wherein the method comprises the following steps: s1, simulating surface turbulence of a blade, acquiring test data of a wind power test prototype, and transmitting the test data to an edge test host; s2, the edge test host sends the test data to a cloud data center for storage; s3, establishing a test database; s4, comparing the turbulence condition of the surface of the tested blade with the turbulence condition of the surface of the simulated blade, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic external member on the surface of the wind turbine generator; the method enables the turbulent flow on the surface of the blade of the wind turbine generator to be visualized, shows the turbulent flow on the surface of the blade more intuitively, extracts data which can be compared with simulation, uses a cloud remote real-time monitoring system, is convenient and fast, can know the field condition of a wind power plant in real time, provides powerful data support for the research on the real turbulent flow on the surface of the blade, and provides a real and reliable data source for the optimization of a blade model.
Description
Technical Field
The invention relates to the technical field of turbulence analysis of blades of wind turbines, in particular to a visual testing method and device for surface turbulence of the blades of the wind turbines.
Background
In a wind turbine generator, a blade is a wind energy collector, and the quality of the pneumatic performance of the blade directly affects the power generation capacity of the wind turbine generator, and the blade is one of important parts of a fan. Along with wind power generation's development, for adaptation market and each complicated operating mode, can install pneumatic external member additional to fan blade, if: the winglet, the spoiler, the VG and the like are used for optimizing the aerodynamic characteristics of the blade, and finally the fan can improve the efficiency. The spoiler and VG in the vane aerodynamic kit are different in installation position on the surface of the vane, and the control effect on the airflow on the surface of the vane is also different.
At present, the position is determined only by means of model simulation, however, because boundary conditions are difficult to accurately input in the simulation, the simulation and the actual state have difference, and the more complex the operating environment, the larger the difference is. Therefore, it is necessary to test the actual state, compare the test result with the simulation and verify, determine the more accurate mounting position of the spoiler and the VG on the surface of the blade, achieve the purpose of optimizing the design, and simultaneously test data can provide data support for the subsequent design.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a visual testing method for the surface turbulence of the blade of the wind turbine generator, so that the surface turbulence of the blade of the wind turbine generator is visualized, the results of verification simulation and actual measurement are further compared, the more accurate installation position of the pneumatic external member on the surface of the blade is determined, and the design is optimized.
The second purpose of the invention is to provide a visual testing device for the surface turbulence of the wind turbine blade.
The first purpose of the invention is realized by the following technical scheme: a visual testing method for surface turbulence of a wind turbine blade comprises the following steps:
s1, simulating blade surface turbulence on the blade surface of a wind power test prototype of a wind power plant by using a silk thread, acquiring test data of the wind power test prototype, and transmitting the test data to an edge test host of the wind power test prototype;
s2, the edge test host sends the obtained test data to a cloud data center in remote communication connection with the edge test host for storage;
s3, filtering, marking and classifying the test data stored in the cloud data center, and establishing a test database;
s4, carrying out blade surface turbulence simulation according to the boundary conditions of the test working conditions, comparing the test blade surface turbulence condition with the simulated blade surface turbulence condition, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic suite on the surface of the wind turbine generator.
Further, the step S1 includes the steps of:
the method comprises the following steps that a plurality of silk threads with preset lengths are arranged on the windward surface of a wind turbine blade according to preset distances, and each silk thread can indicate the airflow direction of the flowing position where the silk thread is located;
a cloud deck high-definition camera is installed at the top of an engine room of the wind power test prototype, and a blade surface silk thread state video, namely a blade surface turbulent flow state video, is recorded in real time when the wind power test prototype operates;
the method comprises the following steps that a main control cabinet in a wind power test sample machine collects running state data of a wind power test sample machine, wherein the running state data comprises a blade angle, an impeller rotating speed, an impeller azimuth, a generator rotating speed, a generator power, a yaw angle, a cabin north angle, a cabin wind speed, a cabin wind direction, a cabin temperature, a unit start-stop switching value, a grid-connected switching value, a power limiting switching value and cabin vibration;
the method comprises the following steps that meteorological data are collected by a wind measuring tower in a wind power plant, wherein the meteorological data comprise wind speed at the height of a hub, wind direction, atmospheric pressure, temperature and humidity, air density and wind speed at the height of a lower blade tip of a fan;
the test data comprises a blade surface turbulence state video, meteorological data and running state data of the wind power test prototype when the wind power test prototype runs, and the blade surface turbulence state video, the meteorological data and the running state data are transmitted to an edge test host in a cabin of the wind power test prototype.
Further, the step S2 includes the steps of:
the cloud data center is in remote communication connection with the edge test host and is used for remotely monitoring the test system, storing data and downloading the data; and the edge test host sends the test data to the cloud data center.
Further, the step S3 includes the steps of:
filtering test data of a wind power test prototype in an abnormal state, wherein the abnormal state comprises the conditions that other external operating conditions except wind speed exceed the preset operating range of the wind power test prototype, the shutdown caused by the fault of the wind power test prototype, the manual shutdown caused by the test or maintenance, the fault of the measuring equipment or the limited power operation and the wind direction is outside an effective sector;
dividing the test data according to a preset time period to obtain wind seeds and blade surface filament state data, wherein the wind seeds comprise wind speed, wind direction, turbulence, air density and wind shear, identifying turbulence lines represented by filaments according to the blade surface filament state data, and marking lines;
and classifying the test data according to the wind speed subareas with the preset step length, and establishing a test database.
Further, the step S4 includes the steps of:
and taking the wind seeds in the test database as simulation input, simulating the distribution condition of the blade surface turbulence line of the wind power test prototype running at each wind speed section, comparing the distribution condition with the test data, comparing the coincidence degree of the simulated blade surface turbulence line and the test blade surface turbulence line, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic suite on the surface of the wind turbine generator.
The second purpose of the invention is realized by the following technical scheme: a visual testing device for the surface turbulence of a wind turbine blade is used for realizing the visual testing method for the surface turbulence of the wind turbine blade and comprises a silk thread, a shooting device, a main control cabinet, an edge testing host, a wind measuring tower and a cloud data center; the silk thread has many according to the predetermined distance to install in the windward side department of wind turbine generator system blade, shoot the equipment and install at the top in wind turbine generator system cabin, main control cabinet and marginal test host computer are all installed in the inside in wind turbine generator system cabin, the anemometer tower is installed in wind turbine generator system position owner wind direction department, main control cabinet and shooting equipment all pass through the net twine and edge test host computer communication connection, anemometer tower and cloud data center all with edge test host computer wireless communication connection.
Further, the shooting equipment is a pan-tilt camera.
Further, the silk threads include wool threads, sweater threads, sewing threads, and nylon silk threads.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the method has the advantages that the turbulent flow on the surface of the blade of the wind turbine generator is visualized, the turbulent flow on the surface of the blade is displayed more visually, and data can be extracted to be compared with simulation;
2. the cloud platform camera is installed at the top of the cabin of the wind turbine generator system, is close to the blade to be shot, has low requirements on cloud platform camera pixels and low cost, and can yaw together with the wind turbine generator system to face the wind in addition, and the cloud platform camera does not need to be changed after the shooting position is determined, so that the acquisition efficiency and the shooting quality are greatly improved.
3. The wind measuring tower is used for accurately measuring wind, so that strong data support is provided for the research of real turbulence on the surface of the blade, and a real and reliable data source is provided for the optimization of a blade model;
4. the test data acquisition uses the cloud remote real-time monitoring, is convenient and fast, and can know the field condition of the wind power plant in real time.
Drawings
FIG. 1 is a flow chart of a visual testing method for surface turbulence of a wind turbine blade.
FIG. 2 is a schematic diagram of verifying simulation and test deviations.
FIG. 3 is a schematic structural diagram of a visual testing device for surface turbulence of a wind turbine blade.
FIG. 4 is a communication schematic diagram of the visual testing device for the surface turbulence of the wind turbine generator blade.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
Referring to fig. 1 to 2, the visual test method for the turbulent flow of the surface of the blade of the wind turbine generator provided by the embodiment takes a wind power test prototype with a wind wheel diameter of 166m and a hub height of 105m as an example, and includes the following steps:
s1, simulating blade surface turbulence on the blade surface of a wind power test prototype of a wind power plant by using a silk thread, constructing a visual blade surface turbulence test system, acquiring test data of the wind power test prototype, and transmitting the test data to an edge test host of the wind power test prototype, wherein the method comprises the following steps:
the method comprises the following steps that a plurality of silk threads with preset lengths are arranged on a windward surface of a blade of the wind turbine generator according to preset distances, the silk threads are fully distributed on the windward surface of the wind turbine generator, each silk thread can indicate the airflow direction of the flow position of the silk thread, the silk threads are 8mm thick and 120mm long, and the distance between every two silk threads is 180mm;
installing a pan-tilt high-definition camera at the top of an engine room of a wind power test prototype, setting definition as high definition and frame number as 60 frames for recording through remote debugging, and recording a silk thread state video of the surface of a blade, namely a turbulent flow state video of the surface of the blade when the wind power test prototype runs in real time;
the method comprises the steps that a main control cabinet in a wind power test sample machine collects running state data of the wind power test sample machine, the running state data are transmitted to an edge test host machine through a modbus communication protocol, the sampling frequency is 1Hz, and the running state data comprise a blade angle, an impeller rotating speed, an impeller azimuth, a generator rotating speed, a generator power, a yaw angle, a cabin north angle, a cabin wind speed, a cabin wind direction, a cabin temperature, a unit starting and stopping switching value, a grid-connected switching value, a power limiting switching value and cabin vibration;
the wind measuring tower in the wind power plant is arranged at the position 2D-4D (332 m-664 m) of the main wind direction of the wind power test prototype machine position, a plurality of sensors used for collecting meteorological data are installed on the wind measuring tower, the sampling frequency is 1Hz, and the installation heights of the sensors are respectively as follows: 105m, 101m, 98m, 97m and 22m, wherein the meteorological data comprise wind speed at the height of a hub, wind direction, atmospheric pressure, temperature and humidity, air density and wind speed at the height of a lower blade tip of a fan;
the test data comprises a blade surface turbulence state video, meteorological data and running state data of the wind power test prototype when the wind power test prototype runs, and the blade surface turbulence state video, the meteorological data and the running state data are transmitted to an edge test host in a cabin of the wind power test prototype.
S2, the edge testing host sends the obtained testing data to a cloud data center connected with the edge testing host in a remote communication mode for storage, and the method comprises the following steps:
the cloud data center is in remote communication connection with the edge test host and is used for remotely monitoring the test system, storing data and downloading the data; and the edge test host sends the test data to the cloud data center.
S3, filtering, marking and classifying the test data stored in the cloud data center, and establishing a test database, wherein the method comprises the following steps:
filtering test data of a wind power test prototype in an abnormal state, wherein the abnormal state comprises the conditions that other external operating conditions except wind speed exceed the preset operating range of the wind power test prototype, the shutdown caused by the fault of the wind power test prototype, the manual shutdown caused by the test or maintenance, the fault of the measuring equipment or the limited power operation and the wind direction is outside an effective sector;
dividing the test data into a group of data according to 10min to obtain wind seeds and blade surface filament state data, wherein the wind seeds comprise wind speed, wind direction, turbulence, air density and wind shear, identifying turbulence lines represented by filaments according to the blade surface filament state data, and marking the turbulence lines;
classifying test data through a wind speed partition with the step length of 1m/s, wherein the test data needs to contain 3-14 m/s wind speed sections, and each wind speed step length is 3 data, and establishing a test database.
S4, carrying out blade surface turbulence simulation according to the boundary conditions of the test working conditions, comparing the test blade surface turbulence condition with the simulated blade surface turbulence condition, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic external member on the surface of the wind turbine generator, wherein the method comprises the following steps:
taking wind seeds in a test database as simulation input, simulating the distribution condition of the blade surface turbulence line of a wind power test prototype running at each wind speed section, comparing the distribution condition with test data, comparing the coincidence degree of the simulated blade surface turbulence line and the test blade surface turbulence line, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic suite 13 on the surface of the wind turbine generator;
the verification simulation and test deviation method is as follows:
the calculation formula of the deviation value of simulation and test is as follows:
deviation = S2 ÷ (S1 + S2+ S3) × 100%
The AB line and the CD line are extreme end boundary points of an over-simulation or testing turbulent flow line, are taken as perpendicular lines of the front edge 9 of the blade and are intersected with the front edge 9 of the blade and the rear edge 10 of the blade; s2 is the area enclosed by the test turbulence line 11, the simulation turbulence line 12, the AB line and the CD line; s1+ S2+ S3 is the area enclosed by ABCD;
calculating the deviation by analogy with other wind speed sections, wherein if the comparison deviation of each wind speed section of 3-14 m/s is less than 10%, the goodness of fit is high, and the design and installation position is only dependent on simulation; when the deviation is 10% -30%, the reason needs to be found out in an oriented way, simulation parameters are corrected, and then the installation position is designed; and when the deviation is more than 30%, searching the reason, correcting the parameters, redesigning and retesting until the deviation is at least less than 30%.
Example 2
Referring to fig. 3 to 4, the embodiment discloses a visual testing device for surface turbulence of a wind turbine blade, which is used for implementing the visual testing method for surface turbulence of a wind turbine blade described in embodiment 1, and includes a silk thread 1, a shooting device 3, a main control cabinet 5, an edge testing host 6, a wind measuring tower 7 and a cloud data center 8; silk thread 1 has many according to the distance of predetermineeing to install in wind turbine generator system blade 2 by the wind surface department, shoot equipment 3 and install at the top in wind turbine generator system cabin 4, main control cabinet 5 and marginal test host computer 6 are all installed in wind turbine generator system cabin 4's inside, anemometry tower 7 is installed in wind turbine generator system position owner wind direction department, main control cabinet 5 and shooting equipment 3 all are connected with marginal test host computer 6 communication through the net twine, anemometry tower 7 and cloud data center 8 all are connected with marginal test host computer 6 wireless communication. The shooting equipment 3 is a pan-tilt high-definition camera; the silk thread 1 comprises wool threads, knitted sweater threads, sewing threads and nylon silk threads, and the adopted silk threads meet the following requirements:
1. the filament morphology and flow characteristics are:
1) The object surface silk threads are kept in a relatively static state along the local air flow direction by the attached flow.
2) Separating the flow, and the object plane silk thread shows a sharp jitter phenomenon.
3) And the swirling flow rotates along the swirling direction.
2. Requirements for testing:
1) Thread thickness and visibility. The interference of the change state of the silk thread to the airflow can be clearly observed or recorded within a certain distance, and the inertia influence of the silk thread is reduced.
2) The length of the filament and the spatial resolution. Spatial resolution requires wires with smaller diameters and lengths; the influence of the rigidity of the silk threads is reduced, the silk threads have certain lengths, and the interval between the adjacent silk threads cannot be too small to avoid the silk threads from being wound together.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the changes in the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A visual testing method for surface turbulence of a wind turbine blade is characterized by comprising the following steps:
s1, simulating blade surface turbulence on the blade surface of a wind power test prototype of a wind power plant by using a silk thread, acquiring test data of the wind power test prototype, and transmitting the test data to an edge test host of the wind power test prototype;
s2, the edge test host sends the obtained test data to a cloud data center in remote communication connection with the edge test host for storage;
s3, filtering, marking and classifying the test data stored in the cloud data center, and establishing a test database;
s4, carrying out blade surface turbulence simulation according to the boundary conditions of the testing working conditions, comparing the conditions of the tested blade surface turbulence with the conditions of the simulated blade surface turbulence, verifying the deviation of simulation and testing, and finally determining the installation position of the blade pneumatic external member on the surface of the wind turbine generator.
2. The visual testing method for the surface turbulence of the wind turbine generator blade according to claim 1, wherein the step S1 comprises the following steps:
the method comprises the following steps that a plurality of silk threads with preset lengths are arranged on a windward surface of a wind turbine blade according to preset distances, and each silk thread can indicate the airflow direction of the flowing position of each silk thread;
installing a pan-tilt high-definition camera at the top of an engine room of the wind power test prototype, and recording a silk thread state video of the surface of the blade, namely a turbulent flow state video of the surface of the blade when the wind power test prototype runs in real time;
the method comprises the following steps that a main control cabinet in a wind power test sample machine collects running state data of a wind power test sample machine, wherein the running state data comprises a blade angle, an impeller rotating speed, an impeller azimuth, a generator rotating speed, a generator power, a yaw angle, a cabin north angle, a cabin wind speed, a cabin wind direction, a cabin temperature, a unit start-stop switching value, a grid-connected switching value, a power limiting switching value and cabin vibration;
the method comprises the following steps that a wind measuring tower in a wind power plant acquires meteorological data, wherein the meteorological data comprise wind speed at the height of a hub, wind direction, atmospheric pressure, temperature and humidity, air density and wind speed at the height of a lower blade tip of a fan;
the test data comprises a blade surface turbulence state video, meteorological data and running state data of the wind power test prototype when the wind power test prototype runs, and the blade surface turbulence state video, the meteorological data and the running state data are transmitted to an edge test host in a cabin of the wind power test prototype.
3. The visual testing method for the surface turbulence of the wind turbine generator blade as set forth in claim 1, wherein the step S2 comprises the steps of:
the cloud data center is in remote communication connection with the edge test host and is used for remotely monitoring the test system, storing data and downloading the data; and the edge test host sends the test data to the cloud data center.
4. The visual testing method for the surface turbulence of the wind turbine generator blade as set forth in claim 1, wherein the step S3 comprises the steps of:
filtering test data of a wind power test prototype in an abnormal state, wherein the abnormal state comprises the conditions that other external operating conditions except wind speed exceed the preset operating range of the wind power test prototype, the shutdown caused by the fault of the wind power test prototype, the manual shutdown caused by the test or the maintenance, the fault or the limited power operation of the measuring equipment and the wind direction are outside an effective sector;
dividing the test data according to a preset time period to obtain wind seeds and blade surface filament state data, wherein the wind seeds comprise wind speed, wind direction, turbulence, air density and wind shear, identifying turbulence lines represented by filaments according to the blade surface filament state data, and marking lines;
and classifying the test data according to the wind speed subareas with the preset step length, and establishing a test database.
5. The visual testing method for the surface turbulence of the wind turbine generator blade as set forth in claim 1, wherein the step S4 comprises the steps of:
and taking wind seeds in the test database as simulation input, simulating the distribution condition of the blade surface turbulent flow line of a wind power test prototype running at each wind speed section, comparing the distribution condition with the test data, comparing the goodness fit of the simulated blade surface turbulent flow line and the test blade surface turbulent flow line, verifying the deviation of simulation and test, and finally determining the installation position of the blade pneumatic suite on the surface of the wind turbine generator.
6. A visual testing device for surface turbulence of a wind turbine blade is used for realizing the visual testing method for the surface turbulence of the wind turbine blade as claimed in any one of claims 1 to 5, and is characterized in that: the system comprises silk threads, shooting equipment, a main control cabinet, an edge testing host, a wind measuring tower and a cloud data center; the silk thread has many to install according to predetermineeing the distance in wind turbine generator system blade by the wind surface department, shoot the top at the wind turbine generator system cabin of equipment installation, main control cabinet and marginal test host computer are all installed in the inside in wind turbine generator system cabin, the anemometer tower is installed in wind turbine generator system position owner wind direction department, main control cabinet and shooting equipment all are connected through net twine and marginal test host computer communication, anemometer tower and cloud data center all with marginal test host computer wireless communication connection.
7. The visual testing device of wind turbine generator system blade surface turbulence according to claim 6, characterized in that: the shooting equipment is a pan-tilt camera.
8. The visual testing device of wind turbine generator system blade surface turbulence according to claim 6, characterized in that: the silk threads include wool threads, sweater threads, sewing threads, and nylon silk threads.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117473906A (en) * | 2023-12-26 | 2024-01-30 | 浙江远算科技有限公司 | Wind power cabin post-processing method and medium based on hydrodynamic simulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117473906A (en) * | 2023-12-26 | 2024-01-30 | 浙江远算科技有限公司 | Wind power cabin post-processing method and medium based on hydrodynamic simulation |
| CN117473906B (en) * | 2023-12-26 | 2024-04-19 | 浙江远算科技有限公司 | Wind power cabin post-processing method and medium based on hydrodynamic simulation |
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