CN106840576A - High-speed wind tunnel oil stream test method - Google Patents
High-speed wind tunnel oil stream test method Download PDFInfo
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- CN106840576A CN106840576A CN201710144379.7A CN201710144379A CN106840576A CN 106840576 A CN106840576 A CN 106840576A CN 201710144379 A CN201710144379 A CN 201710144379A CN 106840576 A CN106840576 A CN 106840576A
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
- G01M9/067—Measuring arrangements specially adapted for aerodynamic testing dealing with flow visualisation
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Abstract
The present invention provides a kind of high-speed wind tunnel oil stream test method, belongs to wind-tunnel oil stream experimental technique field.Comprise the following steps：Configuration high-speed wind-tunnel oil stream experiment finish, cleans test model, and test model is installed in test air tunnel, prepares testing equipment.The surface that high-speed wind tunnel oil stream experiment finish is arranged at test model is formed into finish layer.Setting experiment Ma, model attitude angle and blow-time, firing test wind-tunnel, obtain transient state oil flow graph spectrum.After blowing-out, static oil flow graph spectrum is shot.This test method obtains transient state oil flow graph spectrum and static oil flow graph spectrum simultaneously, and transient state oil flow graph spectrum is analyzed with static oil flow graph spectrum, is complementary to one another, and makes the surface flow feature of the test model of acquisition more fully.
Description
Technical field
The present invention relates to wind-tunnel oil stream experimental technique field, in particular to a kind of high-speed wind tunnel oil stream test method.
Background technology
In wind tunnel test, oil stream experiment is to make air-flow around some features of model flow with picture by means of physical means
The test method that shows of form.By observing oily stream picture, and topological analysis is carried out, can in depth understand flow phenomenon
Essence and mechanism, determine position that air-flow adhere on model, the position and the position of air-flow separation of shock wave and vortex occur
The mode and feature put and be separate, reasonably to explain that experimental data provides foundation, help to find and solve some particular problems
Approach, it helps set up, improve and develop new Aerodynamics.
Oil stream experimental technique as one of wind tunnel test Flow Visualization Technologies, by by the specific finish of certain viscosity with show
Track particle powder dyestuff homogeneous mixture is sprayed on model surface, and coating under the shearing force around model air-flow, carry under one's arms by oil
Pigment powder with air motion, oily flow graph spectrum is formed in model surface.Change and collection of illustrative plates by oil stream direction, oil film thickness
Analysis, it will be appreciated that the regularity of distribution of singular point in object plane flow field, interpretation stream flow through object plane formation attached stream, bubble, whirlpool, swash
Involve the aerodynamic characteristics such as separation, further to disclose the surface flow rule of different profile test models, and for reasonable dismissal is tried
The mechanism tested data or understand the generation of some flow phenomenons provides foundation.
The high-speed wind tunnel oil stream test method of prior art can only obtain static oil flow graph spectrum, oil stream experiment after wind-tunnel blowing-out
The backflow of finish and shock wave, the oily flow graph spectrum for forming model surface are destroyed to a certain extent, the oil stream shot with video-corder after blowing-out
Collection of illustrative plates can not truly reflect current profile of the test model in process of the test.
The content of the invention
It is an object of the invention to provide a kind of high-speed wind tunnel oil stream test method, while obtain transient state oil flow graph composing and quiet
State oil flow graph spectrum, makes the flow performance on surface of the test model of acquisition more fully, and true reflection test model was being tested
Current profile in journey.
The present invention is realized using following technical scheme：
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration high-speed wind-tunnel oil stream experiment finish, cleans test model, and test model is installed in test air tunnel,
Prepare testing equipment.
(2), by high-speed wind tunnel oil stream experiment finish be arranged at test model surface formed finish layer, setting experiment Ma,
Model attitude angle and blow-time, test air tunnel start blowing, obtain transient state oil flow graph spectrum.
(3), after blowing-out, static oil flow graph spectrum is shot.
Presently preferred embodiments of the present invention provide high-speed wind tunnel oil stream test method beneficial effect be：
The high-speed wind tunnel oil stream test method that the present invention is provided, first configuration high-speed wind-tunnel oil stream reagent, then by experimental model
Clean up, it is to avoid influence result of the test because the surface of test model has impurity, result of the test is reflected experiment
The truth of process.Additionally, the surface that high-speed wind tunnel oil stream experiment finish is arranged at test model is formed into finish layer, setting
Experiment Ma, model attitude angle and blow-time, test air tunnel starts blowing, after blowing, high-speed wind tunnel oil stream experiment finish meeting
Flowed on the surface of test model, during experiment finish flows, transient state oil flow graph spectrum can be obtained, can be well
The oily flow graph spectrum on the true surface for catching experimental model.Meanwhile, after blowing-out, static oil flow graph spectrum is shot, make transient state oil flow graph
Spectrum is analyzed with static oil flow graph spectrum, is complementary to one another, and makes the surface flow feature of the test model of acquisition more fully.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings and fall within protection scope of the present invention.
Fig. 1 is that high-speed wind tunnel oil provided in an embodiment of the present invention flows titanium dioxide and machine oil in the collocation method for testing finish
Mass ratio and titanium dioxide and the relation curve of the viscosity of the mixture of machine oil；
Fig. 2 is first transient state oil flow graph spectrum that high-speed wind tunnel oil stream experiment provided in an embodiment of the present invention is obtained；
Fig. 3 is second transient state oil flow graph spectrum that high-speed wind tunnel oil stream experiment provided in an embodiment of the present invention is obtained；
Fig. 4 is the 3rd transient state oil flow graph spectrum that high-speed wind tunnel oil stream experiment provided in an embodiment of the present invention is obtained；
Fig. 5 is the 4th transient state oil flow graph spectrum that high-speed wind tunnel oil stream experiment provided in an embodiment of the present invention is obtained；
Fig. 6 is the static state oil flow graph spectrum that high-speed wind tunnel oil stream experiment provided in an embodiment of the present invention is obtained.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below will be in the embodiment of the present invention
Technical scheme be clearly and completely described.Unreceipted actual conditions person, builds according to normal condition or manufacturer in embodiment
The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, are the conventional product that can be obtained by commercially available purchase
Product.
The high-speed wind tunnel oil stream test method to the embodiment of the present invention is specifically described below.
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration high-speed wind-tunnel oil stream experiment finish, cleans test model, and test model is installed in test air tunnel,
Prepare testing equipment.
1., high-speed wind tunnel oil stream experiment finish includes titanium dioxide, machine oil and fluorescence indicator.
Wherein, machine oil can adjust the viscosity of experiment finish, the experiment finish required for the wind speed of different high-speed wind tunnel
Viscosity it is different, the viscosity of experiment finish is adjusted by adding the amount of different machine oil, expire obtained experiment finish
The demand of the different high-speed wind tunnel of foot.
Preferably, the viscosity of machine oil is 200~400mPa.s.The viscosity of machine oil is smaller, machine oil is easily mixed with titanium dioxide
Close uniform, the viscosity to machine oil is limited, the viscosity required for being more prone to configuration high-speed wind-tunnel oil stream experiment finish makes height
Fast wind-tunnel oil stream experiment finish can be smoothed out oil stream experiment.
Titanium dioxide is titanium dioxide, is the odorless tasteless white powder of soft texture, covering power and strong coloring force, insoluble
Yu Shui, diluted mineral acid, organic solvent, oil etc., nanoscale ultra rme titanium dioxide have semiconductor property, and with high stable
Property, high transparency, high activity and polymolecularity, non-toxic and colour effect.Due to these properties of titanium dioxide, high-speed wind tunnel oil
It is trace particle to add titanium dioxide in stream experiment finish, is composed beneficial to oily flow graph is formed after oily stream experiment.Meanwhile, titanium dioxide is not dissolved in
Water, with certain water proofing property, with moistureproof, easily-storied advantage.
Preferably, the rank of titanium dioxide be 2N, granularity be 200~300 mesh, this titanium dioxide by deep processing, its granularity
Nanoscale is reached, with the easy characteristic for reconciling, such titanium dioxide is mixed with high-speed wind tunnel oil stream with machine oil and fluorescence indicator
When experiment finish, its mixing is more uniform, can extend through the resting period of the oily flow graph spectrum that oil stream experiment is obtained, just
The research of Yu researcher.
Titanium dioxide has colour effect, more preferably, secondary operation is carried out to titanium dioxide, i.e., titanium dioxide is carried out at color
Reason, making the surface attachment of titanium dioxide has coat of colo(u)r, and its method is：Inorganic agent is deposited in titanium dioxide particle surface and bag is formed
Film, and the form, quantity and the method that are precipitated to it be controlled by, making the surface of titanium dioxide has the pigment of the beds of precipitation, the titanium for obtaining
The surface attachment of white powder has coat of colo(u)r.Preferably, inorganic agent is generally selected from the one kind in alundum (Al2O3), silica or two
Kind.After color treatments, it still has the property of titanium dioxide to titanium dioxide, but the titanium dioxide for obtaining has different face
Color, so as to get high-speed wind tunnel oil stream experiment finish can carry out colorful oil flow experiment with conventional black and white oil stream experiment.Meanwhile, can
Preferably to show different zones oil flow graph spectrum and different surfaces handing-over line air-flow whether there is the situation of streaming, make transient state oil flow graph spectrum more
Plus clear, convenient observation.
Fluorescence indicator is a kind of fluorescent dye, obtained high-speed wind tunnel oil stream experiment finish is carried out fluorescent oil flow
Experiment.Preferably, fluorescence indicator is selected from the one kind in fluoroscopic leak test agent or fluorescent material.Wherein, fluoroscopic leak test agent is oil circuit system
Fluoroscopic leak test agent general in system.
High-speed wind tunnel oil stream experiment oil formula contains above-mentioned three kinds of formula materials, enables high-speed wind tunnel oil stream experiment finish
Fluorescent oil flow experiment, colorful oil flow experiment and conventional black and white oil stream experiment are enough carried out, high-speed wind tunnel oil stream experiment finish is increased
Use scope, meanwhile, also make to compose and can deposit the long period by the oil stream oily flow graph that obtains of experiment, convenient research.
2., the collocation method of above-mentioned high-speed wind tunnel oil stream experiment finish, comprises the following steps：
The different sample mixtures of I configuration machine oil titanium dioxide mass ratio, determine the viscosity of sample mixtures, and obtain machine oil
The relation curve of titanium dioxide mass ratio and viscosity.
At least 5 different machine oil titanium dioxide mass ratioes are chosen, sample mixtures is configured, and determine sample mixtures respectively
Viscosity, with machine oil titanium dioxide mass ratio as abscissa, viscosity obtains relation curve for ordinate.
For example：Be respectively configured machine oil titanium dioxide mass ratio for 1.2,1.38,1.44,1.5,1.57,1.64,1.72,1.8,
1.9th, 2.0 10 kinds of sample mixtures, and this 10 kinds of viscositys of sample mixtures are determined respectively, the method for estimated viscosity is according to existing
Have technology, obtain the k value respectively 3280mPa.s of mixture, 2980mPa.s, 2900mPa.s, 2820mPa.s,
2800mPa.s、2770mPa.s、2700mPa.s、2620mPa.s、2600mPa.s、2510mPa.s.With machine oil titanium dioxide quality
Be used for abscissa, the viscosity of its corresponding sample mixtures as ordinate, and by repeatedly configuring the sample of identical mass ratio
This mixture simultaneously determines the k value of sample mixtures, by calculating average value, makes the result of measurement more accurate, uses minimum
The value that square law is obtained draws the relation curve of machine oil titanium dioxide mass ratio and viscosity, relation curve is more had confidence level, curve
As shown in Figure 1.
The II Ma values tested according to oil stream, it is determined that the viscosity of experiment finish, further according to viscosity and relation curve, is tested
The machine oil titanium dioxide mass ratio of finish.
When oil stream experiment is carried out, different oil flows the Ma values of experiment, it is necessary to the high-speed wind tunnel oil stream of different viscositys
Experiment finish, its Ma value is prior art with the corresponding relation of the viscosity of high-speed wind tunnel oil stream experiment finish.By the height for needing
The relation curve of the viscosity of fast wind-tunnel oil stream experiment finish, correspondence machine oil titanium dioxide mass ratio and viscosity, the high speed for being configured
The machine oil of wind-tunnel oil stream experiment finish and the mass ratio of titanium dioxide.Such as：When 0.4≤Ma≤1.5, in requisition for high-speed wind tunnel
Oil stream experiment finish viscosity be 2850~3150mPa.s, when 1.6≤Ma≤3, in requisition for high-speed wind tunnel oil stream experiment
The viscosity of finish is 2620~2790mPa.s.According to Fig. 1, can obtain machine oil is with the viscosity scope of titanium white powder mixture
During 2850~3150mPa.s, machine oil is 1.3~1.5 than scope with the quality of titanium dioxide, can obtain machine oil and mix with titanium dioxide
When the viscosity scope of thing is 2620~2790mPa.s, machine oil is 1.6~1.8 than scope with the quality of titanium dioxide.
The oil agent mixture of the III machine oil titanium dioxide mass ratio obtained according to step II, configuration machine oil and titanium dioxide, and add
Plus fluorescence indicator mixing.
Relation curve in Fig. 1, obtains testing the machine oil titanium dioxide mass ratio of finish, and is configured by the mass ratio
The oil agent mixture of corresponding machine oil and titanium dioxide, and add fluorescence indicator and be mixed to get high-speed wind tunnel oil stream experiment finish.
It is preferably provided with：Fluorescence indicator quality accounts for the 2%~5% of the quality of oil agent mixture, so as to get high-speed wind tunnel
The viscosity that oil stream experiment finish has enough fluorescent effects and experiment finish will not be also flowed to high-speed wind tunnel oil be impacted.
Its specific collocation method is：A small amount of absolute ethyl alcohol is dipped using absorbent cotton to clean up beaker, treat anhydrous
After ethanol volatilizees completely, beaker is placed on electronic balance (or other are weighed on utensil), opens electronic balance, use key amount
Take above-mentioned titanium dioxide to be placed in beaker, be zeroed, add said engine oil, be zeroed, finally add above-mentioned fluorescence and refer to
Show agent, it is using stirring rod that three kinds of material mixings are uniform, obtain high-speed wind tunnel oil stream experiment finish.The high-speed wind tunnel oil for having configured
Stream experiment finish need to stand a period of time, to ensure the abundant loss of bubble in high-speed wind tunnel oil stream experiment finish.Suggestion is being entered
Half an hour is configured before row experiment.
In the collocation method of this high-speed wind tunnel oil stream experiment finish, viscosity technical indicator is introduced, to machine oil and titanium dioxide
Quantified, technical control is stronger, when configuration high-speed wind-tunnel oil stream experiment finish, in strict accordance with different range
The viscosity of the different range required for Ma high-speed wind tunnel oil stream experiment finish carrying out configure, so as to get high-speed wind tunnel oil stream
Experiment finish can preferably carry out oil stream experiment, and obtain the oily flow graph spectrum that can be stored for a long time.
3. wherein, cleaning test model is primarily to the impurity on removal test model surface, it is to avoid due to test model
Surface there is impurity and result of the test is influenceed, result of the test is reflected the truth of process of the test.Meanwhile, also to enter
The preparation of capable other testing equipments, is that the shooting of follow-up oil flow graph spectrum is ready.
Preferably, the surface of test model is cleaned using acetone or alcohol, acetone and ethanol are good organic solvent, energy
It is enough that the impurity on test model surface is cleaned up and removed well, while acetone and ethanol are volatile substances, its
The surface of test model will not be remained in, follow-up experiment is influenceed.At the same time it can also use other organic solvents to test model
Surface cleaned, such as：Methyl alcohol, acrylic acid etc..
First, LED illumination light source is installed, in the light field brightness of illumination and scope is met test requirements document, i.e. test air tunnel
With good illumination.CCD cameras are installed, the time parameters such as camera lens, aperture, focal length, the Exposing Lamp of CCD cameras are debugged,
CCD cameras is clearly shot the image in test model surface area to be measured off field in LED illumination light, and make image transmitting system
System is connected with image processing system, and the image for enabling CCD cameras to shoot passes through image delivering system and reaches at image
Reason system.
(2) surface that high-speed wind tunnel oil stream experiment finish is arranged at test model, is formed into finish layer, it is different by setting
Experiment Ma, model attitude angle and blow-time, and firing test wind-tunnel blows, and the finish layer on test model surface is existed
Moved in the case of blowing, obtain transient state oil flow graph spectrum.Wherein, experiment Ma, model attitude angle and blow-time can be
It is adjusted before experiment, it is also possible to be adjusted in process of the test, transient state oil flow graph spectrum is constantly changed.
Preferably, the surface that high-speed wind tunnel oil stream experiment finish is applied to test model is formed into finish layer, makes finish layer
Setting it is more uniform, finish layer thickness no more than test model surface boundary layer thickness, test air tunnel start blow
After wind, can just make the change of finish layer it is obvious that the transient state oil flow graph spectrum for obtaining becomes apparent from.
More preferably, model attitude angle is more than the k value of the experiment finish used at 15 ° and model attitude angle is not more than 15 °
When use experiment finish k value ratio be 0.97~0.98:The k value of 1, the Ma experiment finish used when being higher than 1.5
The ratio of the k value of the experiment finish used when being not higher than 1.5 with Ma is 0.97~0.98:1, it is applied to the experiment oil in leeward area
The k value of agent is 0.97~0.98 with the ratio of the k value of the experiment finish for being applied to area windward:1, i.e., when model attitude angle is big
When 15 °, Ma are applied to leeward area higher than 1.5, high-speed wind tunnel oil stream experiment finish, the viscosity of high-speed wind tunnel oil stream experiment finish
2%~3% is reduced, i.e., when high-speed wind tunnel oil stream experiment is carried out, if model attitude angle is higher than more than 15 °, Ma
1.5th, when high-speed wind tunnel oil stream experiment finish is located at leeward area, then the high-speed wind tunnel oil stream experiment finish that configuration is new is needed, it is sticked
Degree changes, and k value is that model attitude angle flows experiment finish position less than or equal to 15 °, Ma less than or equal to 1.5, high-speed wind tunnel oil
The 97%~98% of the viscosity of high-speed wind tunnel oil stream experiment finish when area windward.As long as and meet one of three's condition, then
Viscosity reduction by 2%~3%, meet wherein two or when all meeting, be still viscosity reduction by 2%~3%, be not required to mutually folded
Plus.
The image on the surface of test model is obtained by mounted ccd video camera, will be schemed through dynamic image acquisition system
As transmitting to image processing system, transient state oil flow graph spectrum is obtained.Transient state oil flow graph spectrum in acquired sign region does not receive blowing-out
Backflow and shock wave influence, more truly, transient state oil flow graph spectrum can obtain test model Surface Characterization region stream through post processing of image
The field of direction of spectrum, more intuitively.
After blowing-out, stable case is set up according to flow field, picture group and through image procossing in selection reasonable time node interval
System resolving is processed, and obtains test model surface flow field of direction collection of illustrative plates and oil stream photo.Select rational timing node interval,
The timing node that i.e. user needs is interval, can voluntarily select one or more timing nodes interval, convenient research.
(3), after blowing-out, static oil flow graph spectrum is shot.Because transient state oil flow graph spectrum is during shooting, air-flow is constantly sent out
Changing, finish layer also moving, so, the shooting of static oil flow graph spectrum is carried out after blowing-out, transient state oil can be made up and flowed
The deficiency of collection of illustrative plates, makes transient state oil flow graph spectrum be analyzed with static oil flow graph spectrum, be complementary to one another, and makes the test model of acquisition
Surface flow feature more fully.
Preferably, finish is tested using LED light source system irradiation, and black and white oil flow graph is completed by camera and composed and colored
The shooting of oily flow graph spectrum.Fluorescence excitation light source and annex can also be used, the shooting of fluorescent oil flow collection of illustrative plates is completed by camera.
And image identification and post processing are carried out, and transient state oil flow graph spectrum and static oil flow graph spectrum are combined, it is true to catch and display experiment
The oily flow graph spectrum of model surface, convenient research.
Embodiment 1
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration viscosity is the high-speed wind tunnel oil stream experiment finish of 3150mPa.s, and test model is cleaned using acetone
Surface, test model is installed in test air tunnel, and installs LED illumination light source, installs CCD cameras, debugs CCD cameras
The time parameter such as camera lens, aperture, focal length, Exposing Lamp, and image delivering system is connected with image processing system.
(2) surface that high-speed wind tunnel oil stream experiment finish is applied to test model, is formed into finish layer, different examinations are set
Test Ma, model attitude angle and blow-time, wherein, Ma values be 1.3, model attitude angle be 12 °, and make test model be located at meet
Wind face, and test air tunnel is started into blowing, the image on the surface of test model is obtained by mounted ccd video camera, through dynamic
State image capturing system by image transmitting to image processing system, in selection reasonable time node interval picture group and through image at
The resolving of reason system is processed, and obtains test model surface flow field of direction collection of illustrative plates and oil stream photo.
(3), after blowing-out, using LED light origin system, static oil flow graph is shot by camera and is composed, and carry out image identification
And post processing.
Fig. 2-Fig. 5 tests the image sequence that the transient state for obtaining oil flow graph is composed for the high-speed wind tunnel oil stream that the present embodiment is provided,
Several different moments during respectively being from on-test to off-test, transient state oil flow graph spectrum can reflect air-flow
Flowing law.Wherein Fig. 2 just starts for experiment, and air-flow lower right corner from figure is dynamic to upper left angular flux, so the lower right corner occurs in figure
Flocculence oil flow graph spectrum；By after about 1 second, flocculence oil stream disappears as can be seen from Figure 3, and oily stream occurs in that preliminary sensing
Property (from bottom right to upper left)；Again by about 1 second, the track of flowing can be clearly seen from Fig. 4；And after 1 second, Fig. 5 was then
The flowing law clearly showed that after steady air current can more be added.Transient state oil flow graph spectrum advantage be can reflect air-flow from
The Changing Pattern during stable motion is just started to, but requires the relative position of the object such as camera and model in process of the test
Putting to change, therefore shooting angle is limited, and experiment every time can only be measured for a region, and the data for obtaining have
Certain limitation, Fig. 6 tests the oily flow graph spectrum of static state for obtaining for the high-speed wind tunnel oil stream that the present embodiment is provided, and static oily stream is originally
Body is that oily stream picture shooting is carried out after off-test, although the Changing Pattern of air-flow can not be obtained as transient state oil stream, but
It is that can but be shot from each different angle for the oily trajectory mark stablized after testing, can obtains more fully
Oily flow graph spectrogram piece.Transient state oil flow graph spectrum and static oil flow graph spectrum are combined, make transient state oil flow graph spectrum with static oil flow graph
Spectrum is analyzed, is complementary to one another, and makes the surface flow feature of the test model of acquisition more fully, true to catch and show
The oily flow graph spectrum on test model surface, is studied.
Embodiment 2
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration viscosity is the high-speed wind tunnel oil stream experiment finish of 2620mPa.s, and test model is cleaned using ethanol
Surface, test model is installed in test air tunnel, and installs LED illumination light source, installs CCD cameras, debugs CCD cameras
The time parameter such as camera lens, aperture, focal length, Exposing Lamp, and image delivering system is connected with image processing system.
(2) surface that high-speed wind tunnel oil stream experiment finish is applied to test model, is formed into finish layer, different examinations are set
Ma, model attitude angle and blow-time are tested, wherein, Ma values are 1, and model attitude angle is 10 °, and it is leeward to be located at test model
Face, and test air tunnel is started into blowing, the image on the surface of test model is obtained by mounted ccd video camera, through dynamic
Image capturing system by image transmitting to image processing system, picture group and through image procossing in selection reasonable time node interval
System resolving is processed, and obtains test model surface flow field of direction collection of illustrative plates and oil stream photo.
(3), after blowing-out, using LED light origin system, static oil flow graph is shot by camera and is composed, and carry out image identification
And post processing.
Embodiment 3
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration viscosity is the high-speed wind tunnel oil stream experiment finish of 2720mPa.s, and test model is cleaned using ethanol
Surface, test model is installed in test air tunnel, and installs LED illumination light source, installs CCD cameras, debugs CCD cameras
The time parameter such as camera lens, aperture, focal length, Exposing Lamp, and image delivering system is connected with image processing system；
(2) surface that high-speed wind tunnel oil stream experiment finish is applied to test model, is formed into finish layer, different examinations are set
Ma, model attitude angle and blow-time are tested, wherein, Ma values are 0.5, and model attitude angle is 18 °, and test model is located at the back of the body
Wind face, and test air tunnel is started into blowing, the image on the surface of test model is obtained by mounted ccd video camera, through dynamic
State image capturing system by image transmitting to image processing system, in selection reasonable time node interval picture group and through image at
The resolving of reason system is processed, and obtains test model surface flow field of direction collection of illustrative plates and oil stream photo；
(3), after blowing-out, using LED light origin system, static oil flow graph is shot by camera and is composed, and carry out image identification
And post processing.
Embodiment 4
A kind of high-speed wind tunnel oil stream test method, comprises the following steps：
(1), configuration viscosity is the high-speed wind tunnel oil stream experiment finish of 2620mPa.s, and test model is cleaned using ethanol
Surface, test model is installed in test air tunnel, and installs LED illumination light source, installs CCD cameras, debugs CCD cameras
The time parameter such as camera lens, aperture, focal length, Exposing Lamp, and image delivering system is connected with image processing system；
(2) surface that high-speed wind tunnel oil stream experiment finish is applied to test model, is formed into finish layer, different examinations are set
Ma, model attitude angle and blow-time are tested, wherein, Ma values are 1.8, and model attitude angle is 16 °, and test model is located at the back of the body
Wind face, and test air tunnel is started into blowing, the image on the surface of test model is obtained by mounted ccd video camera, through dynamic
State image capturing system by image transmitting to image processing system, in selection reasonable time node interval picture group and through image at
The resolving of reason system is processed, and obtains test model surface flow field of direction collection of illustrative plates and oil stream photo；
(3), after blowing-out, using LED light origin system, static oil flow graph is shot by camera and is composed, and carry out image identification
And post processing.
Embodiments described above is a part of embodiment of the invention, rather than whole embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Claims (10)
1. a kind of high-speed wind tunnel oil flows test method, it is characterised in that comprise the following steps：
(1), configuration high-speed wind-tunnel oil stream experiment finish, cleans test model, and the test model is installed in test air tunnel,
Prepare testing equipment；
(2) surface that high-speed wind tunnel oil stream experiment finish is arranged at the test model, is formed into finish layer, setting experiment
Ma, model attitude angle and blow-time, start the test air tunnel, obtain transient state oil flow graph spectrum；
(3), after blowing-out, static oil flow graph spectrum is shot.
2. high-speed wind tunnel oil according to claim 1 flows test method, it is characterised in that in the step (1), use third
Ketone or ethanol clean the surface of the test model.
3. high-speed wind tunnel oil according to claim 1 flows test method, it is characterised in that in the step (2), the oil
Boundary layer thickness of the thickness of oxidant layer no more than the surface of the test model.
4. high-speed wind tunnel oil according to claim 3 flows test method, it is characterised in that in the step (2), the mould
The experiment that the k value that type attitude angle is more than the experiment finish used at 15 ° is used when being not more than 15 ° with the model attitude angle
The ratio of the k value of finish is 0.97~0.98:1.
5. high-speed wind tunnel oil according to claim 3 flows test method, it is characterised in that in the step (2), the Ma
The ratio of the k value of the experiment finish that the k value of the experiment finish used during higher than 1.5 is used when being not higher than 1.5 with the Ma
It is 0.97~0.98:1.
6. high-speed wind tunnel oil according to claim 3 flows test method, it is characterised in that in the step (2), be applied to
The k value of the experiment finish in leeward area is 0.97~0.98 with the ratio of the k value of the experiment finish for being applied to area windward:1.
7. high-speed wind tunnel oil according to claim 1 flows test method, it is characterised in that in the step (1), prepare institute
State high-speed wind tunnel oil stream experiment finish method be：The different sample mixtures of configuration machine oil titanium dioxide mass ratio, determine first
The viscosity of the sample mixtures, and the relation curve of machine oil titanium dioxide mass ratio and viscosity is obtained, secondly, according to oil stream experiment
Ma values, it is determined that the viscosity of experiment finish, further according to viscosity and relation curve, obtains testing the machine oil titanium dioxide quality of finish
Than finally according to the mass ratio of titanium dioxide described in the machine oil for obtaining, configuring the oil agent mixture of machine oil titanium dioxide, and add fluorescence
Indicator mixes.
8. high-speed wind tunnel oil according to claim 7 flows test method, it is characterised in that the quality of the fluorescence indicator
Account for the 2%~5% of the quality of the oil agent mixture.
9. high-speed wind tunnel oil according to claim 1 flows test method, it is characterised in that in the step (2), pass through
CCD cameras obtain the image on the surface of the test model, transmit to image described image through dynamic image acquisition system
Processing system, obtains the transient state oil flow graph spectrum.
10. high-speed wind tunnel oil according to claim 1 flows test method, it is characterised in that in the step (3), shoot
The static oil flow graph spectrum is using testing finish described in LED light source system irradiation, and to be shot using camera.
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