CN207318044U - A kind of parallel transmission flow field tubular type schlieren - Google Patents
A kind of parallel transmission flow field tubular type schlieren Download PDFInfo
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- CN207318044U CN207318044U CN201721440324.2U CN201721440324U CN207318044U CN 207318044 U CN207318044 U CN 207318044U CN 201721440324 U CN201721440324 U CN 201721440324U CN 207318044 U CN207318044 U CN 207318044U
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- flow field
- schlieren
- cylindrical lens
- primary mirror
- tubular type
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Abstract
The utility model discloses a kind of parallel transmission flow field tubular type schlieren, including the light source, condenser and crack for being located along the same line and arranging successively, further include and be arranged on the collimation schlieren primary mirror arranged successively at crack rear, convergence schlieren primary mirror, the edge of a knife, schlieren imaging object lens and camera, the first cylindrical lens system, flow field pipe and the second cylindrical lens system are also set gradually between collimation schlieren primary mirror and convergence schlieren primary mirror.The utility model is by said structure, without stream field pipe class experimental rig opening flat-open window mouth, you can using the schlieren, so as to avoid damage to the authenticity that flow field pipe class experimental rig flow field is propagated in systems, measurement result is more accurate.
Description
Technical field
It the utility model is related to schlieren field, and in particular to a kind of parallel transmission flow field tubular type schlieren.
Background technology
Stration technique be schlieren system carry out Flow visualisation and measurement commonly used optical means, the technology be by
What Toepler was proposed in 1884, and applied to detection optical glass refractive index.Stration technique is a kind of stream of non-intrusion type
Research method, since this technology stream field variable density is very sensitive and not interference flowing field, therefore Combustion, shock wave,
It is widely adopted in the research in the field such as Flow Field in Wind Tunnel and water hole flow field.At present, some experimental provisions or process units make
Parallel plane window can only be all opened when using schlieren, in some flow field tubular experimental provisions, in experimental provision open plane window
Mouth is possible to destroy the authenticity that flow field is propagated in systems, such as engine compresses chamber etc., just destroys cylindrical laboratory section stream
The authenticity of field, cannot truly reflect the authenticity in cylindrical laboratory section flow field；And some flow field pipe experimental provisions such as some swash
Wave duct, engine compresses chamber or some flow field pipe flow fields, cannot open plane window so that can not use existing line
Shadow instrument.
Utility model content
Technical problem to be solved in the utility model is the schlieren that flow field pipe class experimental rig can be used, mesh
Be a kind of parallel transmission flow field tubular type schlieren is provided, without stream field pipe class experimental rig opening flat-open window mouth, i.e.,
The schlieren can be used, so that the authenticity that flow field pipe class experimental rig flow field is propagated in systems is avoided damage to, measurement knot
Fruit is more accurate.
The utility model is achieved through the following technical solutions：
A kind of parallel transmission flow field tubular type schlieren, including light source, the optically focused for being located along the same line and arranging successively
Mirror and crack, further include be arranged on the collimation schlieren primary mirror arranged successively at crack rear, convergence schlieren primary mirror, the edge of a knife, schlieren into
As object lens and camera, the first cylindrical lens system, flow field circle are also set gradually between collimation schlieren primary mirror and convergence schlieren primary mirror
Pipe and the second cylindrical lens system.Existing tradition schlieren, can only meet that plane window experimental provision uses, run into some cylinders
Shape experimental section cannot just use.Such as engine compresses chamber etc., similar experiments many at present are all to make cylindrical experimental section into
Plane window uses, and just destroys the authenticity in cylindrical laboratory section flow field, cannot truly reflect the true of cylindrical laboratory section flow field
Property.This programme, without stream field pipe class experimental rig open plane window, can also be surveyed compared with existing traditional schlieren
Amount, also it is avoided that destroying the authenticity that flow field is propagated in systems, can truly reflect flow field pipe class experimental provision flow field
Authenticity, measurement result is accurate, is very suitable for some shock tubes, engine compresses chamber or some flow field pipe flow fields and surveys
Amount.
Preferably, the first cylindrical lens system is identical with the second cylindrical lens system structure and symmetrical on flow field pipe.
Preferably, the first cylindrical lens system includes one piece of either polylith cylindrical lens, and the shape of cylindrical lens is arcuate structure,
Cylindrical lens form the center of circle of arcuate structure and the center of circle of flow field pipe and overlap.Polylith cylindrical lens are arranged in parallel, and set cylindrical lens
The flow field pipe class experimental provision that measures as needed of number determine there is set standard.
Preferably, the height of cylindrical lens is equal with the height of flow field pipe.Suitable existing preferably test effect.
Preferably, the flow field pipe is shock tube or engine compresses chamber.
The utility model compared with prior art, has the following advantages and advantages：
This programme, without stream field pipe class experimental rig open plane window, also can compared with existing traditional schlieren
Measure, also it is avoided that destroying the authenticity that flow field is propagated in systems, can truly reflect flow field pipe class experimental provision
The authenticity in flow field, measurement result is accurate, is very suitable for stream in some shock tubes, engine compresses chamber or some flow field pipes
Field measurement.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, does not form the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the utility model structure diagram.
Mark and corresponding parts title in attached drawing：
1st, light source；2nd, condenser；3rd, slit；4th, schlieren primary mirror is collimated；5th, the first cylindrical lens system；6th, flow field pipe；7、
Second cylindrical lens system；8th, schlieren primary mirror is converged；9th, the edge of a knife；10th, schlieren imaging object lens；11st, camera.
Embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model, is not intended to limit the scope of the present invention.
Embodiment 1：
As shown in Figure 1, the utility model includes a kind of parallel transmission flow field tubular type schlieren, including positioned at same straight line
Light source 1, condenser 2 and crack 3 upper and arrange successively, further include the collimation schlieren master for being arranged on and arranging successively at 3 rear of crack
Mirror 4, convergence schlieren primary mirror 8, the edge of a knife 9, schlieren imaging object lens 10 and camera 11, in collimation schlieren primary mirror 4 and convergence schlieren primary mirror 8
Between also set gradually the first cylindrical lens system 5,6 and second cylindrical lens system 7 of flow field pipe.
The course of work of this programme is as follows：1 light beam of light source is imaged on 3 section of slit by the convergence of condenser 2, and light beam leads to
Cross slit 3 to filter, dissipate and export from slit location, after collimating the collimation of schlieren primary mirror 4, be irradiated to the first cylindrical lens system
On, then through flow field pipe 6 (i.e. flow field pipe glass) one side wall, parallel light output, directional light is by testing flow field, from stream
Field 6 another side wall of pipe output, then becomes directional light through the second cylindrical lens system 7.Directional light is by converging schlieren primary mirror
8 converge at focal point, and by 9 cutting beam of the edge of a knife on focal plane, the light beam of transmission images in picture by schlieren imaging object lens 10
In 11 image plane of machine.
Existing tradition schlieren, can only meet that plane window experimental provision uses, and run into some cylindrical experimental sections just
It cannot use.Such as engine compresses chamber etc., similar experiments many at present are all to make cylindrical experimental section into plane window to make
With just destroying the authenticity in cylindrical laboratory section flow field, cannot truly reflect the authenticity in cylindrical laboratory section flow field.This programme with
It is existing tradition schlieren compare, without stream field pipe class experimental rig open plane window, can also measure, also it is avoided that
The authenticity that flow field is propagated in systems is destroyed, can truly reflect the authenticity in flow field pipe class experimental provision flow field, measurement
As a result it is accurate, it is very suitable for some shock tubes, engine compresses chamber or some flow field pipe flow field measurements.
Embodiment 2：
The present embodiment is preferably as follows on the basis of embodiment 1：7 knot of first cylindrical lens system 5 and the second cylindrical lens system
Structure is identical and symmetrical on flow field pipe 6.The setting measurement effect is good.
First cylindrical lens system 5 includes one piece of either polylith cylindrical lens, and the shapes of cylindrical lens is arcuate structure, cylindrical lens
The center of circle of formed arcuate structure and the center of circle of flow field pipe 6 overlap.Polylith cylindrical lens are arranged in parallel, and set the number of cylindrical lens
The flow field pipe class experimental provision measured as needed determines there is set standard.Flow field pipe is enclosed in the first cylindrical lens
Cylindrical lens in 5 and second cylindrical lens system 7 of system are formed in border circular areas, are preferably realized and are received whole light beams, reach
To optimal test effect.
The height of cylindrical lens is equal with the height of flow field pipe 6.Preferably realize and receive whole light beams, reach optimal
Test effect.
The flow field pipe 6 is shock tube, engine compresses chamber or flow field pipe flow field.This programme and existing biography
System schlieren is compared, and without stream field pipe class experimental rig open plane window, can also be measured, also it is avoided that destroying flow field
The authenticity propagated in systems, can truly reflect the authenticity in flow field pipe class experimental provision flow field, and measurement result is accurate,
Some shock tubes, engine compresses chamber or some flow field pipe flow field measurements are very suitable for, overcome existing schlieren
Measure defect.
Above-described embodiment, the purpose of this utility model, technical solution and beneficial effect have been carried out into
One step describes in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, where within the spirit and principles of the present invention, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of parallel transmission flow field tubular type schlieren, including light source (1), the optically focused for being located along the same line and arranging successively
Mirror (2) and crack (3), it is characterised in that further include the collimation schlieren primary mirror (4) for being arranged on crack (3) rear and arranging successively, converge
Poly- schlieren primary mirror (8), the edge of a knife (9), schlieren imaging object lens (10) and camera (11), in collimation schlieren primary mirror (4) and convergence schlieren
The first cylindrical lens system (5), flow field pipe (6) and the second cylindrical lens system (7) are also set gradually between primary mirror (8).
2. one kind according to claim 1 is parallel to transmit flow field tubular type schlieren, it is characterised in that first column is saturating
Mirror system (5) is identical with second cylindrical lens system (7) structure and symmetrical on flow field pipe (6).
3. one kind according to claim 2 is parallel to transmit flow field tubular type schlieren, it is characterised in that the first cylindrical lens system
System (5) includes one piece of either polylith cylindrical lens, and the shape of cylindrical lens is arcuate structure, and cylindrical lens form the circle of arcuate structure
The center of circle of the heart and flow field pipe (6) overlaps.
4. one kind according to claim 3 is parallel to transmit flow field tubular type schlieren, it is characterised in that the height of cylindrical lens
It is equal with the height of flow field pipe (6).
5. one kind according to claim 1 is parallel to transmit flow field tubular type schlieren, it is characterised in that the flow field pipe
(6) it is shock tube or engine compresses chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721440324.2U CN207318044U (en) | 2017-11-01 | 2017-11-01 | A kind of parallel transmission flow field tubular type schlieren |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721440324.2U CN207318044U (en) | 2017-11-01 | 2017-11-01 | A kind of parallel transmission flow field tubular type schlieren |
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| CN207318044U true CN207318044U (en) | 2018-05-04 |
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| CN201721440324.2U Active CN207318044U (en) | 2017-11-01 | 2017-11-01 | A kind of parallel transmission flow field tubular type schlieren |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732115A (en) * | 2018-05-18 | 2018-11-02 | 中国矿业大学(北京) | A kind of schlieren system for observing circular pipe flow field |
| CN112014353A (en) * | 2020-09-04 | 2020-12-01 | 北京理工大学 | Method and system for determining distribution of concentration field of hydrogen jet |
| CN112683486A (en) * | 2020-12-11 | 2021-04-20 | 中国人民解放军国防科技大学 | Shape-preserving side window structure refraction and reflection type schlieren instrument |
| CN112683487A (en) * | 2020-12-11 | 2021-04-20 | 中国人民解放军国防科技大学 | Shape-preserving side window structure integrated schlieren instrument |
-
2017
- 2017-11-01 CN CN201721440324.2U patent/CN207318044U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732115A (en) * | 2018-05-18 | 2018-11-02 | 中国矿业大学(北京) | A kind of schlieren system for observing circular pipe flow field |
| CN108732115B (en) * | 2018-05-18 | 2023-09-29 | 中国矿业大学(北京) | Schlieren system for observing flow field in circular pipeline |
| CN112014353A (en) * | 2020-09-04 | 2020-12-01 | 北京理工大学 | Method and system for determining distribution of concentration field of hydrogen jet |
| CN112683486A (en) * | 2020-12-11 | 2021-04-20 | 中国人民解放军国防科技大学 | Shape-preserving side window structure refraction and reflection type schlieren instrument |
| CN112683487A (en) * | 2020-12-11 | 2021-04-20 | 中国人民解放军国防科技大学 | Shape-preserving side window structure integrated schlieren instrument |
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