CN110057535A - Shock tunnel judges the wall surface silk thread Method of flow visualization and system of intake duct starting - Google Patents
Shock tunnel judges the wall surface silk thread Method of flow visualization and system of intake duct starting Download PDFInfo
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- CN110057535A CN110057535A CN201910447075.7A CN201910447075A CN110057535A CN 110057535 A CN110057535 A CN 110057535A CN 201910447075 A CN201910447075 A CN 201910447075A CN 110057535 A CN110057535 A CN 110057535A
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- silk thread
- intake duct
- air intake
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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 the wall surface silk thread Method of flow visualization that a kind of shock tunnel judges intake duct starting, and the high-speed photography experimental system that wall surface silk thread movement projected image uses is shot in shock tunnel air intake test, silk thread is vertically implanted into air intake duct model compression face and distance piece inner flow passage surface, wall surface silk thread, which is shot, by high speed camera acts projected image, movement according to silk thread in projected image obtains the flow field structure of air intake duct compressing surface and distance piece inner wall, the starting state of air intake duct is quickly judged according to flow field structure, wall surface silk thread Method of flow visualization of the present invention by development for intake duct starting state judgement in shock tunnel air intake test, obtain air intake duct compressing surface and distance piece inner wall clearly flow field structure, simply, it is economical, quickly, accurately determine the starting state of air intake duct, for flow analysis, air intake duct Design and flowing, which calculate, provides reliable test basis.
Description
Technical field
The invention belongs to high-speed aircraft technical field, especially a kind of shock tunnel judges the wall surface silk of intake duct starting
It is real that the high-speed photography that wall surface silk thread movement projected image uses is shot in line Method of flow visualization and shock tunnel air intake test
Check system.
Background technique
High-speed aircraft flying speed is fast, penetration ability is strong, has very high military and civilian value, is to enter in future to face
Near space and the crucial pillar for controlling near space, guaranteeing control advantage, while being also that large-scale development is carried out near space
Carrier, be a kind of novel future aircraft with wide development prospect.
High-speed aircraft mainly uses air suction type scramjet engine for propulsion system, and air intake duct is ultra-combustion ramjet hair
The Pneumatic component that motivation is stood in the breach, performance will directly affect the working characteristics of propulsion system.The starting of inlet stability is
The premise that propulsion system can work normally, inoperative air intake duct will lead to combustion chamber and can not work normally, so as to cause pushing away
Enough power can not be generated into system, aircraft is difficult to keep stable state of flight.Therefore, starting performance is air intake duct
One of key aerodynamic performance is of great significance to realization air suction type high-speed flight.
In conventional wind-tunnel carry out intake duct starting performance test research when, generally use cell pressure measuring technique and
The test result that shade or streak photograph technology obtain judges the starting performance of air intake duct.But carried out in shock tunnel into
When air flue starting ability test, due to the wind tunnel test time very short (several milliseconds), come that current density is low, total temperature is high, it is contemplated that with
Lower three factors: (1) frequency response of load cell, range, connection school, the sensitivity of (2) shade or streak photograph system,
(3) the self luminous influence in flow field, cell pressure measurement and the measuring technologies such as shade or streak photograph in conventional wind-tunnel without
Method is that judging whether air intake duct starts provides valuable test data rapidly.For this purpose, being mentioned for shock tunnel air intake test
A kind of wall surface tuft method Method of flow visualization quickly judging intake duct starting state out, obtains the wall surface silk thread in air intake duct flow field
Method mobile map, starting state convenient by mobile map, efficiently and accurately judging air intake duct.
Both at home and abroad intake duct starting test in, for intake duct starting state judgement experimental technique, mainly include with
Lower two aspects: (1) cell pressure measuring technique obtains the static pressure distribution data of air intake duct wall surface by sensor measurement,
The starting state of air intake duct is judged with this.(2) shade or stration technique obtain air intake duct model pressure by shade or stration technique
Flow field structure near contracting face and lip judges the starting state of air intake duct with this.
In shock tunnel, judges that the starting state of air intake duct is tested using cell pressure measuring technique, be primarily present
The deficiency of the following aspects:
(1) since time very short (several milliseconds) and air intake duct wall pressure hole are stablized in the flow field of shock tunnel and pass
The frequency response of cavity effect existing for sensor end face, sensor is necessary sufficiently high (100MHz or more), the pressure otherwise measured
Data cannot reflect the true pressure characteristic of air intake duct wall surface.
(2) selection of transducer range seriously affects air intake duct wall pressure measurement result, and range is too small to will lead to sensing
There is saturation and is unable to get pressure data in device signal, and the excessive disturbed noise of cell pressure signal that will lead to of range floods.
(3) it is comparatively laborious integrally to join school for the wall static pressure of pressure sensor, and show four aspects: leakproofness is poor at docking
Easy gas leakage, operation difficulty are not easy to realize greatly, join school low efficiency, it is big by artifical influence factor to join school result.
(4) sensor line meeting interference intake road part replacement or state replacement, repeatedly installation can more cumbersome, reliability
Also it can reduce, failure is discharged and replacement is all pretty troublesome.
In shock tunnel, judges that the starting state of air intake duct is tested using shade or stration technique, be primarily present following
The problem of two aspects:
(1) shock tunnel comes that current density is low, even lower than the sensitivity limit of shadow graph system or schlieren system, causes
Air intake duct model compression face and lip clearly flow field structure, therefore nothing nearby can not be obtained using Shadow Techniques or stration technique
Method provides reliable experimental basis to the judgement of air intake duct starting state.
(2) shock tunnel total temperature height leads to flow field self-luminous, obtains air intake duct model compression using shade or stration technique
When flow field structure near face and lip, flow field self-luminous can be recorded simultaneously by shadowing systems or schlieren system with information of flow
It storing into high speed camera, clearly flow field structure map can not be obtained by causing flow field structure to be flooded by flow field self-luminous,
Therefore reliable experimental basis cannot be provided to the judgement of air intake duct starting state.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of shock tunnels to judge air intake duct
Wall surface silk thread is shot in the wall surface silk thread Method of flow visualization of starting and a kind of shock tunnel air intake test acts projected image
The high-speed photography experimental system used.
Intake duct starting state of the invention judges that thought is as follows:
For shock tunnel test period short (several milliseconds), feature low come current density, total temperature is high, risen carrying out air intake duct
Wall surface silk thread Method of flow visualization is used when dynamic test, is implanted into silk in air intake duct model compression face and distance piece inner flow passage surface
Line shoots the projected image of silk thread movement in test by high speed camera, and the movement according to silk thread in image obtains air intake duct pressure
The flow field structure of contracting face and distance piece inner wall, so that the starting state to air intake duct provides the test basis of judgement.
For achieving the above object, technical solution of the present invention is as follows:
Shock tunnel judges the wall surface silk thread Method of flow visualization of intake duct starting, in air intake duct model compression face and isolation
Section inner flow passage surface is vertically implanted into silk thread, and the projected image of wall surface silk thread movement is shot by high speed camera, according to projected image
The movement of middle silk thread obtains the flow field structure of air intake duct compressing surface and distance piece inner wall, quickly judges air inlet according to flow field structure
The starting state in road.
It is preferred that four kinds of shapes of wall surface silk thread movement projected image reflection shock tunnel air intake test process
State: the first is that silk thread indicates the stable state before the foundation of shock tunnel flow field without beat；For second silk thread beat direction with
Shock tunnel direction of flow phase antirepresentation air intake duct absolutely not starts formation and flows backwards；The third is silk thread beat direction and shock wave
Wind-tunnel direction of flow is consistent but silk thread projected length shortens indicates that air intake duct not exclusively starts and has separation stream formation；4th kind is silk
Line beat direction is consistent with shock tunnel direction of flow and silk thread projected length is equal to silk thread original length indicates that air intake duct is complete
It starts.
It is preferred that silk thread is black sewing cotton silk thread, silk thread spacing 15-20mm, wire length is than between silk thread
Away from small 1-2mm.
It is preferred that it is 15-20mm that every 2 silk threads, which are spacing between one group, every group,.
It is preferred that wind-tunnel inlet flow conditions are as follows: Mach number 11.6, total temperature 7880K, stagnation pressure 17.6MPa.
It is preferred that the projecting illumination system using shadow graph system as air intake duct model, passes through high-speed camera
In the projected image record by imaging to video camera CCD that wall surface silk thread is acted course in intake duct starting test by machine, then
Computer, which is transmitted to, through gigabit networking carries out storage analysis.
It is preferred that the light source of shadow graph system is 36V400W tungsten halogen lamp, the shooting frame frequency of high speed camera is
10000fps, time for exposure 1/440000s, the pixel resolution of image are 896*848.
It is preferred that air intake duct model compressing surface and distance piece inner wall be equipped with diameter Ф 1mm threading hole,
Spacing of the fixed value as threading hole is selected in silk thread spacing range, threading axially bored line is vertical with model surface.
It is preferred that the high-speed photography experimental system used when shooting wall surface silk thread movement projected image, comprising: the
One schlieren reflecting mirror 1, halogen tungsten lamp light source 2, test chamber 3, model support 4, wind tunnel window 5 are implanted into the air intake duct of silk thread
Pattern assembly 6, silk thread 7, collimated light beam 8, the second schlieren reflecting mirror 9, high-speed camera 10, computer 11, wind tunnel nozzle 12；
Air intake duct pattern assembly is vertically implanted into silk thread 7 in air intake duct model compression face and distance piece inner flow passage surface, implantation
The air intake duct pattern assembly 6 of silk thread 7 is fixed on model support 4, and model support 4 is located on the central axes of test chamber 3, the
One schlieren reflecting mirror 1 and the second schlieren reflecting mirror 9 are located at the both ends outside test chamber, and halogen tungsten lamp light source 2 is located at wind
3 outside of hole test section, the light projection that halogen tungsten lamp light source 2 issues is to 1 surface of the first schlieren reflecting mirror, through the first schlieren reflecting mirror 1
The air intake duct pattern assembly 6 for reflecting later collimated light beam 8 across 5 pairs of wind tunnel window implantation silk threads carries out projection lighting, plants
The air intake duct pattern assembly 6 for entering silk thread, which is located at 3 inside of test chamber and is located at wind tunnel nozzle 12, to be exported, and wind tunnel window 5
In the end of test chamber 3, the second schlieren reflecting mirror 9 is oppositely arranged with the first schlieren reflecting mirror 1, and collimated light beam 8 projects
Second schlieren reflecting mirror 9 reaches high-speed camera 10, high-speed camera 10 and computer 11 after the reflection of the second schlieren reflecting mirror 9
Connection.
It is preferred that the light that halogen tungsten lamp light source 2 issues becomes to send out after expanding in the high-speed photography experimental system
Spreading beam is incident on the surface of the first schlieren reflecting mirror 1, and the collimated light beam 8 being emitted from the first schlieren reflecting mirror 1 is seen by wind-tunnel
The first window for examining window enters test chamber 3 and carries out projection lighting to air intake duct implantation wire section, by implantation silk thread
The collimated light beam 8 of air intake duct pattern assembly 6 is incident on after the outgoing of the second window of the first window face with wind tunnel window 5
The surface of second schlieren reflecting mirror 9, after the convergence of the second schlieren reflecting mirror 9 on the camera lens of arrival high-speed camera 10, by right
High-speed camera, which is focused, is imaged on high-speed camera for the implantation wire section of air intake duct pattern assembly 6 for being implanted into silk thread
On CCD, high-speed camera 10 is connected by gigabit networking with computer 11, computer 11 by acquired image store with
Processing analysis.
For achieving the above object, dynamic the present invention also provides wall surface silk thread is shot in a kind of shock tunnel air intake test
The high-speed photography experimental system used as projected image, comprising: the first schlieren reflecting mirror 1, halogen tungsten lamp light source 2, test chamber
3, model support 4, wind tunnel window 5 is implanted into the air intake duct pattern assembly 6 of silk thread, silk thread 7, collimated light beam 8, and the second schlieren is anti-
Penetrate mirror 9, high-speed camera 10, computer 11, wind tunnel nozzle 12；
Air intake duct pattern assembly is vertically implanted into silk thread 7 in air intake duct model compression face and distance piece inner flow passage surface, implantation
The air intake duct pattern assembly 6 of silk thread 7 is fixed on model support 4, and model support 4 is located on the central axes of test chamber 3, the
One schlieren reflecting mirror 1 and the second schlieren reflecting mirror 9 are located at the both ends outside test chamber, and halogen tungsten lamp light source 2 is located at wind
3 outside of hole test section, the light projection that halogen tungsten lamp light source 2 issues is to 1 surface of the first schlieren reflecting mirror, through the first schlieren reflecting mirror 1
The air intake duct pattern assembly 6 for reflecting later collimated light beam 8 across 5 pairs of wind tunnel window implantation silk threads carries out projection lighting, plants
The air intake duct pattern assembly 6 for entering silk thread, which is located at 3 inside of test chamber and is located at wind tunnel nozzle 12, to be exported, and wind tunnel window 5
In the end of test chamber 3, the second schlieren reflecting mirror 9 is oppositely arranged with the first schlieren reflecting mirror 1, and collimated light beam 8 projects
Second schlieren reflecting mirror 9 reaches high-speed camera 10, high-speed camera 10 and computer 11 after the reflection of the second schlieren reflecting mirror 9
Connection.
The invention has the benefit that the present invention is by development for intake duct starting shape in shock tunnel air intake test
The wall surface silk thread Method of flow visualization of state judgement obtains air intake duct compressing surface and distance piece inner wall clearly flow field structure, letter
Starting state that is single, economic, quickly and accurately determining air intake duct, providing for flow analysis, Design of Inlet and flowing calculating can
The test basis leaned on.
Detailed description of the invention
Fig. 1 is the high-speed photographic optical system of wall surface silk thread movement course in shock tunnel intake duct starting test of the present invention
Figure；
Fig. 2 is four kinds of shapes of wall surface silk thread movement projected image reflection in shock tunnel intake duct starting test of the present invention
State；
1 is the first schlieren reflecting mirror, and 2 be halogen tungsten lamp light source, and 3 be test chamber, and 4 be model support, and 5 observe for wind-tunnel
Window, 6 be the air intake duct pattern assembly for being implanted into silk thread, and 7 be silk thread, and 8 be collimated light beam, and 9 be the second schlieren reflecting mirror, and 10 be high speed
Video camera, 11 be computer, and 12 be wind tunnel nozzle.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Embodiment 1
The present embodiment provides the wall surface silk thread Method of flow visualization that a kind of shock tunnel judges intake duct starting, in air intake duct
Model compression face and distance piece inner flow passage surface are vertically implanted into silk thread, and the perspective view of wall surface silk thread movement is shot by high speed camera
Picture, the movement according to silk thread in projected image obtains the flow field structure of air intake duct compressing surface and distance piece inner wall, according to flow field
Structure quickly judges the starting state of air intake duct.
As shown in Fig. 2, four kinds of states of wall surface silk thread movement projected image reflection shock tunnel air intake test process: the
One is silk threads, and the stable state before the foundation of shock tunnel flow field is indicated without beat；Second is silk thread beat direction and shock wave wind
Hole direction of flow phase antirepresentation air intake duct absolutely not starts formation and flows backwards；The third is that silk thread beat direction and shock tunnel come
Stream direction is consistent but silk thread projected length shortens indicates that air intake duct not exclusively starts and has separation stream formation；4th kind is silk thread beat
Direction is consistent with shock tunnel direction of flow and silk thread projected length is equal to silk thread original length indicates that air intake duct starts completely.
In the present embodiment, silk thread is black sewing cotton silk thread, and silk thread spacing 15-20mm, wire length is than silk thread spacing
Small 1-2mm.
In the present embodiment, every 2 silk threads are that the spacing between one group, every group is 15-20mm.
In the present embodiment, wind-tunnel inlet flow conditions are as follows: Mach number 11.6, total temperature 7880K, stagnation pressure 17.6MPa.
In the present embodiment, projecting illumination system using shadow graph system as air intake duct model passes through high-speed camera
In the projected image record by imaging to video camera CCD that wall surface silk thread is acted course in intake duct starting test, then pass through
Gigabit networking is transmitted to computer and carries out storage analysis.
It is preferred that the light source of shadow graph system is 36V400W tungsten halogen lamp, the shooting frame frequency of high speed camera is
10000fps, time for exposure 1/440000s, the pixel resolution of image are 896*848.
It is preferred that air intake duct model compressing surface and distance piece inner wall be equipped with diameter Ф 1mm threading hole,
Spacing of the fixed value as threading hole is selected in silk thread spacing range, threading axially bored line is vertical with model surface.
Embodiment 2
Silk thread Method of flow visualization in embodiment 1 acts the high-speed photography of projected image using a kind of shooting wall surface silk thread
Experimental system, comprising: the first schlieren reflecting mirror 1, halogen tungsten lamp light source 2, test chamber 3, model support 4, wind tunnel window 5,
It is implanted into the air intake duct pattern assembly 6 of silk thread, silk thread 7, collimated light beam 8, the second schlieren reflecting mirror 9, high-speed camera 10, computer
11, wind tunnel nozzle 12；
Air intake duct pattern assembly is vertically implanted into silk thread 7 in air intake duct model compression face and distance piece inner flow passage surface, implantation
The air intake duct pattern assembly 6 of silk thread 7 is fixed on model support 4, and model support 4 is located on the central axes of test chamber 3, the
One schlieren reflecting mirror 1 and the second schlieren reflecting mirror 9 are located at the both ends outside test chamber, and halogen tungsten lamp light source 2 is located at wind
3 outside of hole test section, the light projection that halogen tungsten lamp light source 2 issues is to 1 surface of the first schlieren reflecting mirror, through the first schlieren reflecting mirror 1
The air intake duct pattern assembly 6 for reflecting later collimated light beam 8 across 5 pairs of wind tunnel window implantation silk threads carries out projection lighting, plants
The air intake duct pattern assembly 6 for entering silk thread, which is located at 3 inside of test chamber and is located at wind tunnel nozzle 12, to be exported, and wind tunnel window 5
In the end of test chamber 3, the second schlieren reflecting mirror 9 is oppositely arranged with the first schlieren reflecting mirror 1, and collimated light beam 8 projects
Second schlieren reflecting mirror 9 reaches high-speed camera 10, high-speed camera 10 and computer 11 after the reflection of the second schlieren reflecting mirror 9
Connection.
In the high-speed photography experimental system, the light that halogen tungsten lamp light source 2 issues becomes divergent beams after expanding and is incident on
The surface of first schlieren reflecting mirror 1, the collimated light beam 8 being emitted from the first schlieren reflecting mirror 1 pass through the first window of wind tunnel window
Mouth enters test chamber 3 and carries out projection lighting to air intake duct implantation wire section, total by the air intake duct model for being implanted into silk thread
The reflection of the second schlieren is incident on after the outgoing of the second window of the first window face with wind tunnel window 5 at 6 collimated light beam 8
The surface of mirror 9, through the second schlieren reflecting mirror 9 convergence after reach high-speed camera 10 camera lens on, by high-speed camera into
The air intake duct pattern assembly 6 for being implanted into silk thread is implanted into wire section and is imaged on the CCD of high-speed camera by row focusing, high-speed camera
Machine 10 is connected by gigabit networking with computer 11, and acquired image is carried out storage and processing analysis by computer 11.
Embodiment 3
The present embodiment provides shoot wall surface silk thread in a kind of shock tunnel air intake test to act the height that projected image uses
Speed photography experimental system, comprising: the first schlieren reflecting mirror 1, halogen tungsten lamp light source 2, test chamber 3, model support 4, wind-tunnel are seen
Window 5 is examined, is implanted into the air intake duct pattern assembly 6 of silk thread, silk thread 7, collimated light beam 8, the second schlieren reflecting mirror 9, high-speed camera 10,
Computer 11, wind tunnel nozzle 12；
Air intake duct pattern assembly is vertically implanted into silk thread 7 in air intake duct model compression face and distance piece inner flow passage surface, implantation
The air intake duct pattern assembly 6 of silk thread 7 is fixed on model support 4, and model support 4 is located on the central axes of test chamber 3, the
One schlieren reflecting mirror 1 and the second schlieren reflecting mirror 9 are located at the both ends outside test chamber, and halogen tungsten lamp light source 2 is located at wind
3 outside of hole test section, the light projection that halogen tungsten lamp light source 2 issues is to 1 surface of the first schlieren reflecting mirror, through the first schlieren reflecting mirror 1
The air intake duct pattern assembly 6 for reflecting later collimated light beam 8 across 5 pairs of wind tunnel window implantation silk threads carries out projection lighting, plants
The air intake duct pattern assembly 6 for entering silk thread, which is located at 3 inside of test chamber and is located at wind tunnel nozzle 12, to be exported, and wind tunnel window 5
In the end of test chamber 3, the second schlieren reflecting mirror 9 is oppositely arranged with the first schlieren reflecting mirror 1, and collimated light beam 8 projects
Second schlieren reflecting mirror 9 reaches high-speed camera 10, high-speed camera 10 and computer 11 after the reflection of the second schlieren reflecting mirror 9
Connection.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, all those of ordinary skill in the art are completed without departing from the spirit and technical ideas disclosed in the present invention
All equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. the wall surface silk thread Method of flow visualization that shock tunnel judges intake duct starting, it is characterised in that: in air intake duct model pressure
Contracting face and distance piece inner flow passage surface are vertically implanted into silk thread, and the projected image of wall surface silk thread movement is shot by high speed camera, according to
The flow field structure of air intake duct compressing surface and distance piece inner wall is obtained according to the movement of silk thread in projected image, it is fast according to flow field structure
Speed judges the starting state of air intake duct.
2. shock tunnel according to claim 1 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
Be: four kinds of states of wall surface silk thread movement projected image reflection shock tunnel air intake test process: the first be silk thread without
Beat indicates the stable state before the foundation of shock tunnel flow field；Second is silk thread beat direction and shock tunnel direction of flow phase
Antirepresentation air intake duct absolutely not starts formation and flows backwards；The third be silk thread beat direction it is consistent with shock tunnel direction of flow but
Silk thread projected length shorten indicate air intake duct not exclusively start have separation stream formed；4th kind is silk thread beat direction and shock wave wind
Hole direction of flow is consistent and silk thread projected length is equal to silk thread original length indicates that air intake duct starts completely.
3. shock tunnel according to claim 1 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
It is, silk thread is that black is sewed cotton silk thread, and silk thread spacing 15-20mm, wire length is 1-2mm smaller than silk thread spacing.
4. shock tunnel according to claim 1 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
Be: every 2 silk threads are that the spacing between one group, every group is 15-20mm.
5. shock tunnel according to claim 1 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
It is: wind-tunnel inlet flow conditions are as follows: Mach number 11.6, total temperature 7880K, stagnation pressure 17.6MPa.
6. shock tunnel according to claim 1 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
Be: the projecting illumination system using shadow graph system as air intake duct model, by high-speed camera by wall surface silk thread into
In the projected image record by imaging to video camera CCD for acting course in air flue starting test, meter then is transmitted to through gigabit networking
Calculation machine carries out storage analysis.
7. shock tunnel according to claim 6 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
Be: the light source of shadow graph system is 36V400W tungsten halogen lamp, and the shooting frame frequency of high speed camera is 10000fps, and the time for exposure is
1/440000s, the pixel resolution of image are 896*848.
8. the wall surface silk thread FLOW VISUALIZATION of intake duct starting is judged to shock tunnel described in 7 any one according to claim 1
Method, it is characterised in that: the high-speed photography experimental system used when shooting wall surface silk thread movement projected image, comprising: the first line
Shadow reflecting mirror (1), halogen tungsten lamp light source (2), test chamber (3), model support (4), wind tunnel window (5) are implanted into silk thread
Air intake duct pattern assembly (6), silk thread (7), collimated light beam (8), the second schlieren reflecting mirror (9), high-speed camera (10), computer
(11), wind tunnel nozzle (12)；
Air intake duct pattern assembly is vertically implanted into silk thread (7) in air intake duct model compression face and distance piece inner flow passage surface, is implanted into silk
The air intake duct pattern assembly (6) of line (7) is fixed on model support (4), and model support (4) is located in test chamber (3)
On axis, the first schlieren reflecting mirror (1) and the second schlieren reflecting mirror (9) are located at the both ends outside test chamber, halogen tungsten
Lamp source (2) is located on the outside of test chamber (3), the light projection that halogen tungsten lamp light source (2) issues to first schlieren reflecting mirror (1) table
Face, the collimated light beam (8) after the reflection of the first schlieren reflecting mirror (1) pass through the air inlet of wind tunnel window (5) to implantation silk thread
Road pattern assembly (6) carries out projection lighting, and the air intake duct pattern assembly (6) for being implanted into silk thread is located at test chamber (3) inside simultaneously
Exported positioned at wind tunnel nozzle (12), wind tunnel window (5) is located at the end of test chamber (3), the second schlieren reflecting mirror (9) and
First schlieren reflecting mirror (1) is oppositely arranged, and collimated light beam (8) projects the second schlieren reflecting mirror (9) through the second schlieren reflecting mirror
(9) high-speed camera (10) are reached after reflecting, high-speed camera (10) is connect with computer (11).
9. shock tunnel according to claim 8 judges the wall surface silk thread Method of flow visualization of intake duct starting, feature
Be: in the high-speed photography experimental system, the light that halogen tungsten lamp light source (2) issues becomes divergent beams after expanding and is incident on the
The surface of one schlieren reflecting mirror (1), the collimated light beam (8) being emitted from the first schlieren reflecting mirror (1) is by the of wind tunnel window
One window enters test chamber (3) and carries out projection lighting to air intake duct implantation wire section, by the air intake duct for being implanted into silk thread
The collimated light beam (8) of pattern assembly (6) is incident on after the outgoing of the second window of the first window face with wind tunnel window (5)
The surface of second schlieren reflecting mirror (9), after the convergence of the second schlieren reflecting mirror (9) on the camera lens of arrival high-speed camera (10),
It is taken the photograph at a high speed by focusing for air intake duct pattern assembly (6) the implantation wire section for being implanted into silk thread to be imaged on to high-speed camera
On the CCD of camera, high-speed camera (10) is connected by gigabit networking with computer (11), and computer (11) is by collected figure
As carrying out storage and processing analysis.
10. shooting the high-speed photography experiment system that wall surface silk thread movement projected image uses in a kind of shock tunnel air intake test
System, characterized by comprising: the first schlieren reflecting mirror (1), halogen tungsten lamp light source (2), test chamber (3), model support (4),
Wind tunnel window (5) is implanted into the air intake duct pattern assembly (6) of silk thread, silk thread (7), collimated light beam (8), the second schlieren reflecting mirror
(9), high-speed camera (10), computer (11), wind tunnel nozzle (12)；
Air intake duct pattern assembly is vertically implanted into silk thread (7) in air intake duct model compression face and distance piece inner flow passage surface, is implanted into silk
The air intake duct pattern assembly (6) of line (7) is fixed on model support (4), and model support (4) is located in test chamber (3)
On axis, the first schlieren reflecting mirror (1) and the second schlieren reflecting mirror (9) are located at the both ends outside test chamber, halogen tungsten
Lamp source (2) is located on the outside of test chamber (3), the light projection that halogen tungsten lamp light source (2) issues to first schlieren reflecting mirror (1) table
Face, the collimated light beam (8) after the reflection of the first schlieren reflecting mirror (1) pass through the air inlet of wind tunnel window (5) to implantation silk thread
Road pattern assembly (6) carries out projection lighting, and the air intake duct pattern assembly (6) for being implanted into silk thread is located at test chamber (3) inside simultaneously
Exported positioned at wind tunnel nozzle (12), wind tunnel window (5) is located at the end of test chamber (3), the second schlieren reflecting mirror (9) and
First schlieren reflecting mirror (1) is oppositely arranged, and collimated light beam (8) projects the second schlieren reflecting mirror (9) through the second schlieren reflecting mirror
(9) high-speed camera (10) are reached after reflecting, high-speed camera (10) is connect with computer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447075.7A CN110057535A (en) | 2019-05-27 | 2019-05-27 | Shock tunnel judges the wall surface silk thread Method of flow visualization and system of intake duct starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447075.7A CN110057535A (en) | 2019-05-27 | 2019-05-27 | Shock tunnel judges the wall surface silk thread Method of flow visualization and system of intake duct starting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110057535A true CN110057535A (en) | 2019-07-26 |
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| CN111024360A (en) * | 2019-12-16 | 2020-04-17 | 中国空气动力研究与发展中心 | Space silk flow display method and system for judging starting state of air inlet |
| CN111520761A (en) * | 2020-04-22 | 2020-08-11 | 中国空气动力研究与发展中心 | Rotary detonation combustion chamber capable of realizing observation of flow field structure of isolation section |
| CN111811769A (en) * | 2020-06-16 | 2020-10-23 | 南京航空航天大学 | Three-dimensional internal rotation type air inlet channel real-time oil flow display method with waverider precursor and adopted oil agent |
| CN112067239A (en) * | 2020-07-27 | 2020-12-11 | 中国航天空气动力技术研究院 | Method for automatically judging establishment of supersonic wind tunnel flow field based on schlieren video |
| CN113588204A (en) * | 2021-06-30 | 2021-11-02 | 中国航天空气动力技术研究院 | Method for measuring interference characteristics of air inlet channel shock wave boundary layer |
| CN114061894A (en) * | 2021-11-12 | 2022-02-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Cavity model pulsating pressure and noise measuring system |
| CN114894428A (en) * | 2022-04-15 | 2022-08-12 | 西华大学 | Fluid flow measuring method based on deflection angle of fluorescent microwire |
| CN117554030A (en) * | 2024-01-12 | 2024-02-13 | 中国空气动力研究与发展中心计算空气动力研究所 | Flow display diagram shooting device based on reflecting mirror |
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| CN111024360A (en) * | 2019-12-16 | 2020-04-17 | 中国空气动力研究与发展中心 | Space silk flow display method and system for judging starting state of air inlet |
| CN111520761A (en) * | 2020-04-22 | 2020-08-11 | 中国空气动力研究与发展中心 | Rotary detonation combustion chamber capable of realizing observation of flow field structure of isolation section |
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| CN111811769A (en) * | 2020-06-16 | 2020-10-23 | 南京航空航天大学 | Three-dimensional internal rotation type air inlet channel real-time oil flow display method with waverider precursor and adopted oil agent |
| CN112067239B (en) * | 2020-07-27 | 2022-06-03 | 中国航天空气动力技术研究院 | Method for automatically judging establishment of supersonic wind tunnel flow field based on schlieren video |
| CN112067239A (en) * | 2020-07-27 | 2020-12-11 | 中国航天空气动力技术研究院 | Method for automatically judging establishment of supersonic wind tunnel flow field based on schlieren video |
| CN113588204B (en) * | 2021-06-30 | 2023-12-12 | 中国航天空气动力技术研究院 | Method for measuring interference characteristics of shock wave boundary layer of air inlet channel |
| CN113588204A (en) * | 2021-06-30 | 2021-11-02 | 中国航天空气动力技术研究院 | Method for measuring interference characteristics of air inlet channel shock wave boundary layer |
| CN114061894A (en) * | 2021-11-12 | 2022-02-18 | 中国空气动力研究与发展中心高速空气动力研究所 | Cavity model pulsating pressure and noise measuring system |
| CN114061894B (en) * | 2021-11-12 | 2023-12-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Cavity model pulsating pressure and noise measurement system |
| CN114894428A (en) * | 2022-04-15 | 2022-08-12 | 西华大学 | Fluid flow measuring method based on deflection angle of fluorescent microwire |
| CN117554030A (en) * | 2024-01-12 | 2024-02-13 | 中国空气动力研究与发展中心计算空气动力研究所 | Flow display diagram shooting device based on reflecting mirror |
| CN117554030B (en) * | 2024-01-12 | 2024-03-26 | 中国空气动力研究与发展中心计算空气动力研究所 | Flow display diagram shooting device based on reflecting mirror |
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