CN110132540A - A kind of tidal current energy generating equipment tail flow field measuring system and method - Google Patents
A kind of tidal current energy generating equipment tail flow field measuring system and method Download PDFInfo
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- CN110132540A CN110132540A CN201910535681.4A CN201910535681A CN110132540A CN 110132540 A CN110132540 A CN 110132540A CN 201910535681 A CN201910535681 A CN 201910535681A CN 110132540 A CN110132540 A CN 110132540A
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- 238000003892 spreading Methods 0.000 claims abstract description 10
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- 238000012360 testing method Methods 0.000 claims description 11
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- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000001429 stepping effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
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- 238000000917 particle-image velocimetry Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
Abstract
The invention discloses a kind of tidal current energy generating equipment tail flow field measuring system and methods.The tidal current energy generating equipment of the tail flow field measuring system is arranged in experimental tank；The two side walls of experimental tank are transparent glass；Mobile laser sheet optical generating device is located at experimental tank side；Mobile laser sheet optical generating device face experimental tank side wall generates laser sheet optical；Mobile image acquisition device is located at right above experimental tank, and the shooting direction of mobile image acquisition device is towards underface and face laser sheet optical irradiation area；Mobile image acquisition device is for acquiring the image of laser sheet optical irradiation area after the spreading trace particle in experimental tank；Mobile image acquisition device is connect with computer, and computer is used to calculate the wake flow velocity field of tidal current energy generating equipment；Mobile laser sheet optical generating device and mobile image acquisition device can be towards the same horizontal direction synchronizing movings.This present invention can be realized the entirety measurement to tidal current energy generating equipment tail flow field water velocity.
Description
Technical field
The present invention relates to marine tidal-current energy power field, more particularly to a kind of tidal current energy generating equipment tail flow field measuring system and
Method.
Background technique
In recent years, the regenerable marine energy that marine tidal-current energy is huge as a kind of reserves, is easier to develop increasingly obtains generation
The attention of various countries, boundary.Currently, the principal mode of marine tidal-current energy Resources and utilization is marine tidal-current energy power generation, and tidal current energy generating equipment
It is then the main means for realizing marine tidal-current energy power generation.
For tidal current energy generating equipment before realizing sizing or carrying out real sea situation test, laboratory test and test are essential
Link.Currently, the laboratory test of tidal current energy generating equipment and test are sent out mainly for aerofoil profile or the hydrodynamic performance of blade, device
Electrical property, energy conversion efficiency etc., in these tests and test, the speed in flow field generallys use single-point flow velocity measurement and obtains
, it can not reflect the feature of tidal current energy generating equipment tail flow field, and the measurement of the flow velocity of tail flow field entirety is to power generator entirety
Environmental influence research etc. after design optimization, the layout designs of power generator array and real sea situation are laid is of great significance.
Summary of the invention
The object of the present invention is to provide a kind of tidal current energy generating equipment tail flow field measuring system and methods, realize to tail flow field
The whole measurement of water velocity.
To achieve the above object, the present invention provides following schemes:
A kind of tidal current energy generating equipment tail flow field measuring system, comprising: experimental tank, mobile laser sheet optical generating device,
Mobile image acquisition device and computer；
Tidal current energy generating equipment is provided in the experimental tank；The mobile laser sheet optical generating device is located at described
The side of experimental tank；The two side walls of the experimental tank are transparent glass；The mobile laser sheet optical generating device is used for
The side wall of experimental tank described in face generates laser sheet optical；The mobile image acquisition device be located at the experimental tank just on
Side, the shooting direction of the mobile image acquisition device is towards underface, and the irradiation area of laser sheet optical described in face；It is described
Mobile image acquisition device is for acquiring the irradiation area of the laser sheet optical after the spreading trace particle in the experimental tank
Image；The output end of the mobile image acquisition device is connect with the input terminal of the computer, and the computer is based on
Calculate the speed of the tidal current energy generating equipment tail flow field；The mobile laser sheet optical generating device and mobile image acquisition dress
Setting can be towards the same horizontal direction synchronizing moving.
Optionally, the mobile laser sheet optical generating device include laser generator, piece Seterolithography device, Laser platform,
First stepper motor, four the first runners and two first level guide rails；The laser emitting direction face of the laser generator
The experimental tank side wall；Described Seterolithography device is located at the laser emitting mouth of the laser generator；The laser generator
It is fixed on the upper surface of the Laser platform, first stepper motor is fixed on the lower surface of the Laser platform, institute
State four angles that four the first runners are distributed in the Laser platform lower surface, the output shaft and four of first stepper motor
The central shaft driven of a first runner connects；Two first level guide rails are parallel to each other, and are fixed on the test water
On the ground of slot side, and it is parallel with the experimental tank side wall；Four first runners are led along two first levels
Rail movement.
Optionally, the mobile image acquisition device includes digital image capture, counts and adopt fixed frame, two the second steppings
Motor, two the second runners and two the second horizontal guide rails；
Top edge of two second horizontal guide rails respectively along the two side walls of the experimental tank is fixed；The number is adopted
Fixed frame is moved by two second runners along two second horizontal guide rails；Two second stepper motor difference
It is fixed on the number and adopts fixed frame both ends, the output shaft of two second stepper motors and the center of two second runners
Axis transmission connection；The digital image capture is fixed on the number and adopts on fixed frame, is located at the laser sheet optical irradiation area
Surface, and the shooting direction of the digital image capture is towards underface.
Optionally, which further includes mobile wave absorption slot；The mobile wave absorption slot includes wave absorption groove body, two
Draught line, groove body movable stand, two third stepper motors and two third runners；
The bottom of the wave absorption groove body is transparent glass；The groove body movable stand is by two third runners along two
The second horizontal guide rail movement；Two third stepper motors are separately fixed at groove body movable stand both ends, two institutes
The output shaft for stating third stepper motor is connect with the central shaft driven of two third runners respectively；Two draught lines
One end is separately fixed at the both ends of the groove body movable stand, and the other end of two draught lines is separately fixed at the wave absorption slot
On two angles of body front end, the wave absorption groove body floats on the water surface of the experimental tank and is located at the mobile image acquisition
The underface of device；The mobile wave absorption slot, the mobile laser sheet optical generating device and the mobile image acquisition device can
Towards the same horizontal direction synchronizing moving.
Optionally, first stepper motor, the second stepper motor and the third stepper motor with the meter
Calculation machine is connected by data power line；The computer for control first stepper motor, the second stepper motor and
The third stepper motor rotates synchronously.
Optionally, the front-rear side walls of the wave absorption groove body are arc line shaped in the vertical direction.
Optionally, the wavelength for the laser that the laser generator generates is 532nm.
Optionally, length scale is carved on first guide rail and second horizontal guide rail.
Invention additionally discloses a kind of tidal current energy generating equipment tail flow field measurement methods, generate electricity and fill applied to above-mentioned marine tidal-current energy
Set tail flow field measuring system；The tail flow field measurement method includes:
Water in experimental tank is carried out to make stream, so that the water flow in the experimental tank is flowed through tidal current energy generating equipment and is formed
Tail flow field；
The position for adjusting the mobile laser sheet optical generating device and the mobile image acquisition device swashs the movement
Tail flow field described in mating plate light generating apparatus and the mobile image acquisition device face；
The spreading trace particle into the experimental tank；
The irradiation area of the mobile laser sheet optical generating device is continuously shot using the mobile image acquisition device
Two images；
Calculate the moving distance of same particle in two images；
The movement speed of each particle is calculated according to the interval time of two images shooting and the moving distance；All grains
The movement speed of son reflects the velocity field of the irradiation area；
By adjusting the vertical height and horizontal distance of the mobile laser sheet optical generating device, and moved described in synchronous adjustment
Motion video acquisition device repeats step and " is continuously shot the mobile laser sheet optical using the mobile image acquisition device to occur
The two images of the irradiation area of device " to step " is calculated according to the interval time of two images shooting and the moving distance
The movement speed of each particle " is to obtain the velocity field of entire velocity wake region.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: tide disclosed in this invention
Stream energy power generator tail flow field measuring system and method pass through mobile laser sheet optical generating device and generate laser sheet optical irradiation wake flow
, image of the tail flow field after spreading trace particle is acquired by mobile image acquisition device, then calculates wake flow using image
The flow velocity of water flow in realizes the entirety measurement to tail flow field flow rate of water flow, and breaching the prior art can not accurately measure
The bottleneck of whole tail flow field.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the system front view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention；
Fig. 2 is the system top view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention；
Fig. 3 is the system left view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention；
Fig. 4 is the method flow diagram of the tail flow field measurement method embodiment of tidal current energy generating equipment of the present invention.
Appended drawing reference: 1- experimental tank, 2- tidal current energy generating equipment, 3- computer, 4- laser generator, 5- piece Seterolithography
Device, 6- Laser platform, the first stepper motor of 7-, 8- first level guide rail, 9- digital image capture, 10- number adopt fixed frame,
11- second stepper motor, the second horizontal guide rail of 12-, 13- wave absorption groove body, 14- draught line, 15- groove body movable stand, 16- third step
Into motor, 17- data power line, 18- computer operation platform, the 19- water surface, the first runner of 20-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the system front view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention.
Fig. 2 is the system top view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention.
Fig. 3 is the system left view of tidal current energy generating equipment tail flow field measuring system embodiment of the present invention.
Referring to FIG. 1 to FIG. 3, the tidal current energy generating equipment tail flow field measuring system, comprising: experimental tank 1, mobile laser piece
Light generating apparatus, mobile image acquisition device and computer 3；
The bottom of the experimental tank 1 is cement plane, top is opened wide, and two side walls are high saturating tempered glass；Described
Tidal current energy generating equipment 2 is provided in experimental tank 1；The mobile laser sheet optical generating device is located at the experimental tank 1
Side；The mobile laser sheet optical generating device generates laser sheet optical for experimental tank 1 described in face；The mobile image is adopted
Acquisition means are located at the surface of the experimental tank 1, and the shooting direction of the mobile image acquisition device is towards underface, and just
To the irradiation area of the laser sheet optical；The mobile image acquisition device is used for the spreading tracer grain in the experimental tank 1
The image of the irradiation area of the laser sheet optical is acquired after son；The output end and the computer of the mobile image acquisition device
3 input terminal connection, the computer 3 are used to calculate the wake flow velocity field of the tidal current energy generating equipment 2.
Tidal current energy generating equipment 2 of the invention is the small scale model machine or model of tidal current energy generating equipment, marine tidal-current energy hair
Electric installation 2 includes impeller, engine space and pillar, and impeller is connected with engine space by bearing, and engine space is fixed on examination by pillar
Test 1 bottom of sink.
The mobile laser sheet optical generating device includes laser generator 4, piece Seterolithography device 5, Laser platform 6, first
7, four the first runners 20 of stepper motor and two first level guide rails 8；It is flat that the laser generator 4 is fixed on the laser
The upper surface of platform 6, first stepper motor 7 are fixed on the lower surface of the Laser platform 6, four first runners
It is distributed in four angles of 6 lower surface of Laser platform, the output shaft of first stepper motor 7 and each first runner
Central shaft driven connection；Two first level guide rails 8 are parallel to each other, and are fixed on the ground of 1 side of experimental tank
On, and it is parallel with the side wall of the experimental tank 1；Four first runners are moved along two first level guide rails 8；Institute
State the side wall of experimental tank 1 described in the laser emitting direction face of laser generator 4；Described Seterolithography device 5 is located at described sharp
The laser emitting mouth of optical generator 4.
The laser generator 4 is double-pulse laser generator, and the wavelength that the laser generator 4 generates laser is
532nm.Described Seterolithography device 5 is used to laser becoming laser sheet optical.The irradiation area of described Seterolithography device 5 is marine tidal-current energy
2 rear of power generator, the wake flow field areas below of the water surface 19.
Laser platform 6 includes two layers, respectively top layer table top and bottom table top；Top layer table top and bottom table top are square
Shape steel plate table top.Top layer table top is laid with one layer of rubber, for placing laser generator 4 and there is certain shock-proof effect, top
Layer table top is connected with bottom table top by four hydraulic columns, the vertical height of adjustable top layer table top, four the first runners point
It is not mounted on the quadrangle of bottom table top, the first stepper motor 7 is fixed on the lower surface of bottom table top；By driving the first stepping
Motor 7 pushes Laser platform 6 to move on first level guide rail 8.
The mobile image acquisition device includes digital image capture 9, counts and adopt 10, two second stepper motors of fixed frame
11, two the second runners and two the second horizontal guide rails 12；
Top edge of two second horizontal guide rails 12 respectively along the two side walls of the experimental tank 1 is fixed；It is described
Number is adopted fixed frame 10 and is moved by two second runners along two second horizontal guide rails 12；Two second steppings
Motor 11 is fixed on the both ends that the number adopts fixed frame 10, the output shaft of two second stepper motors 11 and two described
The central shaft driven of two runners connects；The digital image capture 9 is fixed on the number and adopts on fixed frame 10, is located at described sharp
The surface of mating plate light irradiation area, and the shooting direction of the digital image capture 9 is towards underface.
Number, which adopts fixed frame 10, with stationary digital image acquisition device 9 and to drive digital image capture 9 mobile, improve number
Stability when image acquisition device 9 is shot, while realizing the adjustment to camera site.
The tail flow field measuring system further includes mobile wave absorption slot；The mobile wave absorption slot includes wave absorption groove body 13, two and leads
Lead 14,15, two third stepper motors 16 of groove body movable stand and two third runners；
The wave absorption groove body 13 floats on the water surface 19 of the experimental tank 1 and is located at mobile image acquisition device just
Lower section；The wave absorption groove body 13 be bottom be transparent glass, front-rear side walls be in the vertical direction arc line shaped, side wall are stainless steel
The open flat groove body of material and top；Front-rear side walls are arc line shaped in the vertical direction, it is possible to reduce the influence of stream field；Institute
It states groove body movable stand 15 and is moved by two third runners along two second horizontal guide rails；Two third steppings
Motor 16 is separately fixed at the both ends of the groove body movable stand 15, and the output shaft of two third stepper motors 16 is respectively with two
The central shaft driven of a third runner connects；One end of two draught lines 14 is separately fixed at the groove body movable stand
15 both ends, the other end of two draught lines 14 are separately fixed on two angles of 13 front end of wave absorption groove body；It is described
Mobile wave absorption slot, the mobile laser sheet optical generating device and the mobile image acquisition device can be same towards the same horizontal direction
Moved further.The light distortion that the water surface 19 rises and falls when wave absorption groove body 13 is used to eliminate test and ripple generates, avoids to measurement result
It has an impact.The draught line 14 is nylon rope.
Groove body movable stand 15 is moved for fixing wave absorption groove body 13 and controlling wave absorption groove body 13 along the second horizontal guide rail 12.
The laser generator 4, first stepper motor 7, the second stepper motor 11 and third stepping electricity
Machine 16 is electrically connected by data power line 17 with the computer 3；The computer 3 is for controlling first stepper motor
7, the second stepper motor 11 and the third stepper motor 16 rotate synchronously, and are also used to carry out the laser generator 4
Control.
The data output end of digital image capture 9 passes through the data input pin of data power line 17 and the computer 3
Connection.The digital image capture 9 is used to acquire the image of laser sheet optical irradiation area, converts number for acquired image
Word signal, and digital signal is output to the computer 3.
The computer 3 is fixed on computer operation platform 18.The computer 3 is also used to realize time synchronization control
System, mark fixed sum data storage.Computer operation platform 18 is for placing and operating computer 3.
The first level guide rail 8 and second horizontal guide rail 12 are steel construction, and 8 He of first level guide rail
Length scale and length reading are carved on second horizontal guide rail 12.
When being tested using tidal current energy generating equipment tail flow field measuring system of the invention, first in experimental tank 1
Water filling is rotated by manually controlling or controlling each stepper motor by computer 3, realizes and adopt fixation to Laser platform 6, number
The adjustment of the position of frame 10 and groove body movable stand 15 makes laser generator 4 be directed at the area to be measured at 2 rear of tidal current energy generating equipment
Domain, then adjustment sheet Seterolithography device 5, makes laser horizontal aligument measured zone in the form of sheets.By manually controlling or by computer 3
Demarcated: the focal length for adjusting digital image capture 9 is in laser sheet optical plane in pinpointed focus, in laser sheet optical plane
A scale with a scale is placed in center, is controlled digital image capture 9 by computer 3 and is shot a clearly image, root
It is demarcated according to size of the scale in image to measured zone.Start experimental tank 1 after the completion of calibration makes stream, in test water
The hollow glass micropearl of spreading 10um diameter passes through when laser sheet optical area pairs with water flow as trace particle, trace particle in slot 1
The scattering or refraction of laser make it be shown as luminous point one by one in camera lens, control digital image capture 9 by computer 3 and exist
Two images are shot in preset time, are calculated by identification and are determined trace particle from first image to the position of second image
It moves, in conjunction with shooting interval, determines the speed of each trace particle, the speed of all trace particles is in entire measured zone
It can reflect the instantaneous velocity field of measured zone.After a measured zone is measured, by manually controlling or passing through calculating
Machine 3 controls Laser platform 6, number adopts fixed frame 10 and 15 synchronizing moving of groove body movable stand and measures wake flow to next measured zone
, so as to measure the tail flow field at 2 rear different location of tidal current energy generating equipment.
Velocimetry of the present invention is particle image velocimetry method.In the above process, the speed of each trace particle is determined
Degree method particularly includes: using the size of cross correlation algorithm and measured zone calculate two images in the same particle displacement away from
From the movement speed of trace particle can be calculated in conjunction with the shooting interval of two images.
Measuring system of the invention realizes the surface current field synchronization measurement to tidal current energy generating equipment tail flow field, and uses nothing
Contact type measurement mode, will not stream field itself have an impact, so as to truely and accurately show wake flow field structure and variation.
Fig. 4 is the method flow diagram of tidal current energy generating equipment tail flow field measurement method embodiment of the present invention.
Tidal current energy generating equipment tail flow field measurement method of the invention, applied to above-mentioned tidal current energy generating equipment tail flow field
Measuring system；It before the tail flow field measurement method executes, needs to demarcate to by computer: adjusting digital image capture
Focal length be in laser sheet optical plane in pinpointed focus, laser sheet optical plane central place a scale with a scale, lead to
It crosses computer control digital image capture and shoots a clearly image, according to the scale in image to the size of measured zone
It is demarcated.
Referring to fig. 4, which includes:
Step 101: the water in experimental tank being carried out to make stream, the water flow in the experimental tank is made to flow through marine tidal-current energy power generation
Device forms tail flow field；
Step 102: the position of the adjustment mobile laser sheet optical generating device and the mobile image acquisition device makes institute
State tail flow field described in mobile laser sheet optical generating device and the mobile image acquisition device face；
Step 103: spreading trace particle in Xiang Suoshu experimental tank；
Step 104: the photograph of the mobile laser sheet optical generating device is continuously shot using the mobile image acquisition device
Penetrate the two images in region；
Step 105: calculating the moving distance of same particle in two images；
Step 106: the mobile speed of each particle is calculated according to the interval time of two images shooting and the moving distance
Degree；The movement speed of all particles reflects the velocity field of the irradiation area；
Step 107: by adjusting the vertical height and horizontal distance of the mobile laser sheet optical generating device, and same step
The whole mobile image acquisition device repeats step 103 to step 106 to obtain the velocity field of entire velocity wake region.It is moving
When moving the mobile laser sheet optical generating device and the mobile image acquisition device, since mobile wave absorption slot and the movement swash
Movement is synchronous in the horizontal direction with the mobile image acquisition device for mating plate light generating apparatus, therefore mobile wave absorption slot and movement
Image collecting device moves horizontally in the same direction.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: tide disclosed in this invention
Stream energy power generator tail flow field measuring system and method pass through mobile laser sheet optical generating device and generate laser sheet optical irradiation wake flow
, image of the tail flow field after spreading trace particle is acquired by mobile image acquisition device, then calculates wake flow using image
The flow velocity of water flow in realizes the entirety measurement to tail flow field flow rate of water flow, and breaching the prior art can not accurately measure
The bottleneck of whole tail flow field.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (9)
1. a kind of tidal current energy generating equipment tail flow field measuring system characterized by comprising experimental tank, mobile laser sheet optical
Generating device, mobile image acquisition device and computer；
Tidal current energy generating equipment is provided in the experimental tank；The mobile laser sheet optical generating device is located at the test
The side of sink；The two side walls of the experimental tank are transparent glass；The mobile laser sheet optical generating device is used for face
The side wall of the experimental tank generates laser sheet optical；The mobile image acquisition device is located at the surface of the experimental tank,
The shooting direction of the mobile image acquisition device is towards underface, and the irradiation area of laser sheet optical described in face；The shifting
Irradiation area of the motion video acquisition device for acquiring the laser sheet optical after the spreading trace particle in the experimental tank
Image；The output end of the mobile image acquisition device is connect with the input terminal of the computer, and the computer is for calculating
The speed of the tidal current energy generating equipment tail flow field；The mobile laser sheet optical generating device and the mobile image acquisition device
It can be towards the same horizontal direction synchronizing moving.
2. tidal current energy generating equipment tail flow field measuring system according to claim 1, which is characterized in that the mobile laser
Piece light generating apparatus include laser generator, piece Seterolithography device, Laser platform, the first stepper motor, four the first runners and
Two first level guide rails；The side wall of experimental tank described in the laser emitting direction face of the laser generator；Described light
Former is located at the laser emitting mouth of the laser generator；The laser generator is fixed on the upper table of the Laser platform
Face, first stepper motor are fixed on the lower surface of the Laser platform, and four first runners are distributed in described sharp
Four angles of light device platform lower surface, the central shaft driven of the output shaft of first stepper motor and four first runners
Connection；Two first level guide rails are parallel to each other, and are fixed on the ground of the experimental tank side, and with the test
The side wall of sink is parallel；Four first runners are moved along two first level guide rails.
3. tidal current energy generating equipment tail flow field measuring system according to claim 2, which is characterized in that the mobile image
Acquisition device includes that digital image capture, number adopt fixed frame, two second stepper motors, two the second runners and two second
Horizontal guide rail；
Top edge of two second horizontal guide rails respectively along the two side walls of the experimental tank is fixed；The number adopts fixation
Frame is moved by two second runners along two second horizontal guide rails；Two second stepper motors are fixed respectively
Fixed frame both ends are adopted in the number, and the output shaft of two second stepper motors and the central axis of two second runners pass
Dynamic connection；The digital image capture is fixed on the number and adopts on fixed frame, just positioned at the laser sheet optical irradiation area
Top, and the shooting direction of the digital image capture is towards underface.
4. tidal current energy generating equipment tail flow field measuring system according to claim 3, which is characterized in that further include that movement disappears
Wave trough；The mobile wave absorption slot includes wave absorption groove body, two draught lines, groove body movable stand, two third stepper motors and two
Third runner；
The bottom of the wave absorption groove body is transparent glass；The groove body movable stand is by two third runners along described in two
The movement of second horizontal guide rail；Two third stepper motors are separately fixed at groove body movable stand both ends, and two described
The output shaft of three stepper motors is connect with the central shaft driven of two third runners respectively；One end of two draught lines
The both ends of the groove body movable stand are separately fixed at, before the other end of two draught lines is separately fixed at the wave absorption groove body
On two angles at end, the wave absorption groove body floats on the water surface of the experimental tank and is located at the mobile image acquisition device
Underface；The mobile wave absorption slot, the mobile laser sheet optical generating device and the mobile image acquisition device can be towards same
One horizontal direction synchronizing moving.
5. tidal current energy generating equipment tail flow field measuring system according to claim 4, which is characterized in that first stepping
Motor, the second stepper motor and the third stepper motor are connect with the computer by data power line；It is described
Computer is rotated synchronously for controlling first stepper motor, the second stepper motor and the third stepper motor.
6. tidal current energy generating equipment tail flow field measuring system according to claim 4, which is characterized in that the wave absorption groove body
Front-rear side walls be in the vertical direction arc line shaped.
7. tidal current energy generating equipment tail flow field measuring system according to claim 2, which is characterized in that the laser occurs
The wavelength for the laser that device generates is 532nm.
8. tidal current energy generating equipment tail flow field measuring system according to claim 3, which is characterized in that first guide rail
Length scale is carved with on second horizontal guide rail.
9. a kind of tidal current energy generating equipment tail flow field measurement method, which is characterized in that be applied to as any in claim 1~8
Tidal current energy generating equipment tail flow field measuring system described in one；The tail flow field measurement method includes:
Water in experimental tank is carried out to make stream, so that the water flow in the experimental tank is flowed through tidal current energy generating equipment and forms wake flow
?；
The position for adjusting the mobile laser sheet optical generating device and the mobile image acquisition device makes the mobile laser piece
Tail flow field described in light generating apparatus and the mobile image acquisition device face；
The spreading trace particle into the experimental tank；
Two width of the irradiation area of the mobile laser sheet optical generating device are continuously shot using the mobile image acquisition device
Image；
Calculate the moving distance of same particle in two images；
The movement speed of each particle is calculated according to the interval time of two images shooting and the moving distance；All particles
Movement speed reflects the velocity field of the irradiation area；
By adjusting the vertical height and horizontal distance of the mobile laser sheet optical generating device, and mobile figure described in synchronous adjustment
As acquisition device, repeats step and " be continuously shot the mobile laser sheet optical generating device using the mobile image acquisition device
Irradiation area two images " to step " according to two images shooting interval time and the moving distance calculate it is each
The movement speed of particle " is to obtain the velocity field of entire velocity wake region.
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Citations (3)
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| CN104865045A (en) * | 2015-06-16 | 2015-08-26 | 国家海洋技术中心 | Closed-loop control tide flow simulation test device |
| CN105675918A (en) * | 2016-01-05 | 2016-06-15 | 清华大学 | Moving positioning device for particle image velocimetry |
| CN209910946U (en) * | 2019-06-20 | 2020-01-07 | 国家海洋技术中心 | Tidal current energy power generation device wake field measurement system |
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| CN104865045A (en) * | 2015-06-16 | 2015-08-26 | 国家海洋技术中心 | Closed-loop control tide flow simulation test device |
| CN105675918A (en) * | 2016-01-05 | 2016-06-15 | 清华大学 | Moving positioning device for particle image velocimetry |
| CN209910946U (en) * | 2019-06-20 | 2020-01-07 | 国家海洋技术中心 | Tidal current energy power generation device wake field measurement system |
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| 汪洁: "海流能转换器水动力特性的数值模拟及实验研究", 《中国优秀硕士学位论文全文数据库基础科学辑》, no. 03, pages 11 - 12 * |
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