CN106768813B - The wall surface silk thread display methods in hypersonic interior rotatable air intake duct and distance piece flow field - Google Patents
The wall surface silk thread display methods in hypersonic interior rotatable air intake duct and distance piece flow field Download PDFInfo
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- CN106768813B CN106768813B CN201611104859.2A CN201611104859A CN106768813B CN 106768813 B CN106768813 B CN 106768813B CN 201611104859 A CN201611104859 A CN 201611104859A CN 106768813 B CN106768813 B CN 106768813B
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- wall surface
- silk thread
- air intake
- intake duct
- distance piece
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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
Abstract
The invention discloses a kind of hypersonic interior rotatable air intake duct and the wall surface silk thread display methods in distance piece flow field, belong to fluid mechanics technology, this method replaces the part wall of interior rotatable air intake duct and distance piece inner flow passage using transparent material, the transparent wall surface of side is used as observation, processes multiple rows of micropore on the transparent wall surface of the other side；Silk thread cements on the outside of wall surface after micropore penetrates, and in outside wall surface paste context paper；It when experiment, uses up and is radiated on background paper, while shooting the wall surface silk thread flow pattern of interior flow field from the other side；By multiple rows of silk thread micropore known to spatial position, optical distortion amendment can be carried out to silk thread flow pattern picture, keep the interior flow field structure observed more accurate and reliable.The present invention provides a kind of interior flow field display technology for interior rotatable air intake duct and distance piece by the potentiality of expansion wall surface silk thread display technology, to recognize and understand three-dimensional flow structure complicated inside interior rotatable air intake duct and distance piece.
Description
Technical field
The invention belongs to fluid mechanics technologies, and in particular to hypersonic interior rotatable air intake duct and distance piece inside stream
A kind of display methods of field.
Background technique
Hypersonic interior rotatable air intake duct is captured and compressed that efficiency is higher, and aerodynamic drag is smaller to air-flow, and easily with
Circular chamber's fusion, these advantages cause the extensive concern of domestic and international researcher.Due to interior rotatable air intake duct it is special three
It ties up structure type and resulting Three-dimensional Flow is very complicated, traditional schlieren method and pressure measurement method institute are getable
Information of flow is more limited, it is difficult to the three-dimensional flow structure of internal rotatable air intake duct obtains comprehensive understanding, deeper into it is careful
Analysis with understand also be not easy to carry out.
Wall surface silk thread display methods can show the dynamic silk thread flow pattern of near wall, so as to determine flow direction and
Pattern of flow has been obtained in low speeds flow field and is widely applied and develops." ultra-combustion ramjet starts document in shock tunnel
The expansion of wall surface silk thread display methods is applied in shock tunnel, sees by three face pressure of machine retraction air flue flow field experimental observation " (yellow oceangoing ship)
Measure the silk thread flow pattern in hypersonic three face pressures retraction air flue configuration external compression wall surface and side wall surface.Document is " in hypersonic
The wall surface silk thread of rotatable air intake duct flowing is shown " (Li Zhufei) further apply the method in hypersonic interior rotatable air intake duct
External compression face on, intuitively, dynamically show the flow separation zone range of external compression face near wall, and turn in being used to determine
Whether formula air intake duct starts.However, these trials are difficult to be applied directly to the inside stream rotating ring of interior rotatable air intake duct and distance piece
In border.Therefore, it is necessary to develop suitable Flow visualisation method and measurement means, flowed with obtaining in interior rotatable air intake duct and distance piece
The Three-dimensional Flow information of road complexity.
Summary of the invention
The object of the present invention is to provide a kind of for the aobvious of hypersonic interior rotatable air intake duct and distance piece interior flow field
Show method, observe its interior flow, to recognize and understand Three-dimensional Flow complicated inside interior rotatable air intake duct and distance piece
Structure.
The purpose of the present invention is accomplished by the following way, the wall in a kind of hypersonic interior rotatable air intake duct and distance piece flow field
The part wall of face silk thread display methods, hypersonic interior rotatable air intake duct and distance piece inner flow passage is replaced using transparent material；
The transparent wall surface of side is used as observation, processes multiple rows of micropore on the transparent wall surface of the other side；In silk thread penetrates one by one through micropore
After runner, cemented on the outside of wall surface；In the outside wall surface paste context paper for the transparent component for being stained with silk thread, increase silk thread and as back
The contrast of the transparent component of scape；It when experiment, uses up and is radiated on background paper, while shooting the wall surface of interior flow field from the other side
Silk thread flow pattern；By multiple rows of silk thread micropore known to steric position, optical distortion can be carried out to silk thread flow pattern picture and repaired
Just, make the interior flow field structure observed more accurate and reliable.
Further, the inner flow passage component of hypersonic interior rotatable air intake duct and distance piece include in air intake duct compression section and
Distance piece can be observed a portion, can also several parts observe together.
Further, the inner flow passage wall surface to be observed can be processed all using transparent material, can also be only in wall surface
Upper and lower two sides or a pair of transparent mounting blocks of left and right sides insertion, transparent material needs to guarantee certain translucency, to guarantee to clap
The silk thread picture taken the photograph is high-visible.
Further, the molded line of inner flow passage outside wall surface can be modified as simple shape, can also be with to reduce optical distortion
Without repairing type.
Further, the micropore processed on transparent wall surface should be vertical with inner wall holding as far as possible, and micro well locations can be any,
The spread pattern of micropore can be the proper alignments such as rectangular, circular array, irregular can also arrange.
Further, it after silk thread penetrates micropore on transparent wall surface, is pasted, can also be infused in micropore on the outside of wall surface
Enter glue to be fixed, or directly pastes silk thread in inner wall.
Further, it is the contrast for increasing silk thread with the transparent component as background, translucency is pasted on the outside of wall surface
The good and uniform white scraps of paper can also use other materials or other colors as background.
Further, from the corresponding another side wall surface shooting in silk thread position, shooting angle is adjustable, can also be in silk thread
Ipsilateral shot.
Further, by multiple rows of silk thread micropore known to spatial position, it is abnormal optics can be carried out to silk thread flow pattern picture
It turns revisionism just, can also correct by other means, or even do not correct.
The principle of the present invention is described as follows:
The inner flow passage component of hypersonic interior rotatable air intake duct and distance piece includes compression section and distance piece in air intake duct, under
Face is illustrated by taking distance piece as an example:
1) distance piece of hypersonic interior rotatable air intake duct and isolation segment model is processed using the good transparent material of translucency
It forms, inner wall still uses original inner flow passage molded line, and the Profile Design of outside wall surface is such as rectangular or round at simple shape
Deng to reduce optical distortion；Or the main body of distance piece uses conventional opaque material, and in distance piece wall surface or so or up and down
A pair of transparent mounting blocks of two sides insertion, the inner wall of the mounting blocks still keep the molded line of original inner flow passage, the molded line of outside wall surface
It is designed to simple shape；
2) the transparent wall surface of distance piece side is not dealt with, is used as observation, and on the transparent wall surface of the other side, processing
Multiple rows of micropore, micropore is vertical with inner wall holding as far as possible, arrangement mode, spacing and the coverage area of micropore, and visual observation needs
Depending on；
3) by the silk thread of moderate length, the micropore processed is penetrated one by one, and the free one end of silk thread is kept to flow inside
Road, the other end cements silk thread from outside wall surface in micropore, with a small amount of glue, while sealing micropore, this silk thread method of attaching
It can not only guarantee that silk thread has enough freedom degrees to follow the direction of local air-flow, but also smaller to the interference of interior flow field；
4) after being pasted to silk thread, the outside wall surface for the transparent component for being pasted with silk thread is handled, to increase silk thread
With the contrast of the transparent component as background, such as outside wall surface paste translucency it is good and uniformly blank sheet of paper as background,
Other trnaslucent materials or other colors can be used；
5) it when carrying out wind tunnel experiment, is radiated on the component for being stained with silk thread with light beam, shows silk thread stream using transmitted light
Spectrum, is shot in other side；
6) since the 3D shape of transparent wall surface is complicated, optical distortion may occur for the silk thread flow pattern picture taken,
At this point, optical distortion amendment can be carried out to silk thread flow pattern picture by multiple rows of silk thread micropore known to spatial position, thus
To accurate silk thread flow pattern.
Other inner flow passage components of hypersonic interior rotatable air intake duct and distance piece can also be seen according to the above method
It surveys.
Compared with prior art, the present invention having the following advantages:
(1) the inner flow passage wall portions of hypersonic interior rotatable air intake duct of the invention and isolation segment model use transparent material
Material processing, in conjunction with wall surface silk thread display methods, can obtain the wall surface silk thread flow pattern of interior flow field；
(2) present invention can not only guarantee that silk thread has enough freedom degrees, using the fixed silk thread of wall surface micropore to follow gas
The direction of stream, and reduce the interference to interior flow field；
(3) optical path that the present invention uses is simple, can directly carry out the shooting of silk thread flow pattern, field range is big；
(4) present invention can make three-dimensional wall surface by multiple rows of silk thread micropore known to steric position on wall surface
At optical distortion be modified, keep the interior flow field structure observed more accurate and reliable.
Detailed description of the invention
Fig. 1 is the present invention for hypersonic interior rotatable air intake duct and an example of distance piece interior flow field display methods
Schematic diagram.
Fig. 2 is an example of the present invention for the distribution of the silk thread of hypersonic interior rotatable air intake duct and distance piece inner wall
Schematic diagram.
Fig. 3 is signal of the present invention for an example of the interior flow field display methods of compression section in interior rotatable air intake duct
Figure.
Fig. 4 is interior flow field display side of the present invention for compression section in the air intake duct of a pair of transparent mounting blocks of wall surface insertion
The schematic diagram of one example of method.
Specific embodiment
For the purpose of the present invention, technical solution and advantage and good effect is more clearly understood, below in conjunction with
Specific example, and referring to attached drawing, the present invention is described in more detail.
Fig. 1 is distance piece interior flow field display side of the present invention for hypersonic interior rotatable air intake duct and isolation segment model
The schematic diagram of one example of method, as shown in Figure 1, interior flow field display methods includes air intake duct external compression section 1, air intake duct internal pressure
Contracting section 2, distance piece 3, light source 4, lens 5, optical path 6, high-speed motion picture camera 7.
In specific example, compression section 2 processes jointly in air intake duct external compression section 1 and air intake duct, can also be with separate machined after
It is attached again；Distance piece 3 is individually processed using transparent material, then passes through flanged joint with compression section 2 in air intake duct；Isolation
The inner wall of section 3 still uses original molded line, and the molded line of outside wall surface is simplified using cylindrical；In the side of 3 wall surface of distance piece
Process multiple rows of micropore；Silk thread is penetrated in micropore, and is cemented silk thread on the outside of wall surface；Then it is close to a Zhang Bai on the outside of wall surface
Coloured paper piece is as background.
Working principle: when wind tunnel experiment, the strong light that light source 4 issues is dissipated, optical path 6 is radiated at isolation by lens 5
On the background paper of section outside wall surface, transmitted light illuminates wall surface silk thread all in observation area；In the other side of distance piece, with high speed
Video camera 7 is directly shot, and the silk thread flow pattern of wind tunnel experiment condition lower wall surface is obtained.
Fig. 2 is an example of the present invention for the distribution of the silk thread of hypersonic interior rotatable air intake duct and distance piece inner wall
Schematic diagram, Fig. 2 gives the silk thread distribution situation in Fig. 1 example on distance piece inner wall.As shown in Fig. 2, the silk of inner wall
Line distribution includes distance piece 3 and wall surface silk thread 101.In specific example, wall surface silk thread 101 is arranged in the inner wall of 3 side of distance piece
On face, 30 × 6 silk threads are shared, the flow direction distance and span distance between silk thread are consistent respectively, and wire length is also as far as possible
It is consistent；The diameter that the micropore of silk thread root is constrained on wall surface cannot be too big, to reduce the interference of stream field.Working principle:
Multiple rows of micropore is processed on the wall surface of 3 side of distance piece, micropore is as far as possible perpendicular to inner wall；Wall surface silk thread 101 is inserted into micropore,
So that silk thread is kept certain length inside wall surface, cut silk thread on the outside of wall surface later and glues the one end of silk thread in micropore
Jail；Finally paste that translucency is good and the uniform white scraps of paper are as background on the outside of wall surface.
Fig. 3 is schematic diagram of the present invention for an example of the interior flow field display methods of compression section in air intake duct, Fig. 3
Compared with Fig. 1 example, method used in the two is identical, and application site has changed compression section in air intake duct by distance piece.Such as Fig. 3 institute
Show, the interior flow field display methods of compression section includes air intake duct external compression section 1, compression section 2 in air intake duct, connection method in air intake duct
Orchid 102.In specific example, 2 separate machined of compression section in air intake duct external compression section 1 and air intake duct is connected by connecting flange 102
It connects, flange design is on the inside of wall surface, to reduce the interference to flow field on the outside of wall surface；Compression section 2 uses transparent material in air intake duct
It processes, processes multiple rows of micropore on the wall surface of one side, micropore is vertical with inner wall holding as far as possible；Silk thread is penetrated in micropore, and
Silk thread is cemented on the outside of the wall surface of compression section in air intake duct, a white scraps of paper are then close on the outside of wall surface as background.
Working principle is similar with Fig. 1 example.
Fig. 4 is interior flow field display side of the present invention for compression section in the air intake duct of a pair of transparent mounting blocks of wall surface insertion
The schematic diagram of one example of method both applies the compression section in air intake duct compared with Fig. 3 example, but in Fig. 4 example
Wall surface there is no all transparents, only slot in two sidewalls and be embedded in transparent mounting blocks.As shown in figure 4, wall surface insertion one
Interior flow field display methods to compression section in the air intake duct of transparent mounting blocks includes air intake duct external compression section 1, air intake duct internal pressure
Contracting section 2, detachable transparent mounting blocks 103, the cover board 104 of detachable transparent mounting blocks.In specific example, air intake duct external compression section
1 processes together with compression section 2 in air intake duct, wherein simplifying to the outside wall surface shape of compression section 2 in air intake duct；It compresses inside
The slot of 2 two sides of section design perforation is packed into detachable transparent mounting blocks 103, and is reinforced with cover board 104；Detachable transparent mounting blocks
103 inner wall still uses original inner flow passage molded line, and the molded line of outside wall surface is rectangular；Detachable transparent installation in side
Block 103 processes multiple rows of micropore, and micropore is as far as possible perpendicular to inner wall；Silk thread is penetrated in micropore, and the compression section in air intake duct
Silk thread is cemented on the outside of wall surface；Then it is close to a white scraps of paper on the outside of wall surface as background.Working principle and Fig. 3 example class
Seemingly.
Above-described specific example carries out the purpose of the present invention, technical solution and advantage and good effect
It is further described, it should be understood that the above description is only a specific example of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (6)
1. the wall surface silk thread display methods in a kind of hypersonic interior rotatable air intake duct and distance piece flow field, it is characterised in that: superb
The part wall of rotatable air intake duct and distance piece inner flow passage is replaced using transparent material in the velocity of sound；The transparent wall surface of side, which is used as, to be seen
It surveys, processes multiple rows of micropore on the transparent wall surface of the other side；Silk thread glues on the outside of wall surface after micropore penetrates inner flow passage one by one
Jail；In the outside wall surface paste context paper for the transparent component for being stained with silk thread, increase the comparison of silk thread with the transparent component as background
Degree；It when experiment, uses up and is radiated on background paper, while shooting the wall surface silk thread flow pattern of interior flow field from the other side；By space
Multiple rows of silk thread micropore known to arrangement position carries out optical distortion amendment to silk thread flow pattern picture, makes the interior flow field observed
Structure is more accurate and reliable.
2. the wall surface silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized by: the molded line of inner flow passage outside wall surface is modified as simple shape, to reduce optical distortion.
3. the wall surface silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized by: the micropore processed on transparent wall surface should be vertical with inner wall holding as far as possible.
4. the wall surface silk thread display methods in hypersonic interior rotatable air intake duct according to claim 3 and distance piece flow field,
It is characterized by: the spread pattern for the micropore processed on the transparent wall surface is rectangular, circular array proper alignment, or not whole
Neat arrangement.
5. the wall surface silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized by: being pasted on the outside of wall surface after silk thread penetrates micropore on transparent wall surface, glue can also be injected in micropore
It is fixed, or directly pastes silk thread in inner wall.
6. the wall surface silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized by: it is good and equal to paste translucency on the outside of wall surface to increase the contrast of silk thread with the transparent component as background
The even white scraps of paper are as background.
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| CN201611104859.2A CN106768813B (en) | 2016-12-05 | 2016-12-05 | The wall surface silk thread display methods in hypersonic interior rotatable air intake duct and distance piece flow field |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108999845B (en) * | 2018-09-06 | 2019-12-13 | 中国人民解放军国防科技大学 | Three-dimensional variable cross-section curved flow channel design method and device based on geometric fusion |
| CN109238623A (en) * | 2018-11-13 | 2019-01-18 | 西北工业大学 | A kind of silk thread mounting structure and its installation method for wind tunnel test part |
| CN109357834A (en) * | 2018-11-13 | 2019-02-19 | 西北工业大学 | A kind of fluorescence silk thread mounting structure based on sleeve |
| CN109459205A (en) * | 2018-12-07 | 2019-03-12 | 西北工业大学 | A kind of fluorescence silk thread mounting device and installation method |
| CN110057535A (en) * | 2019-05-27 | 2019-07-26 | 中国空气动力研究与发展中心 | Shock tunnel judges the wall surface silk thread Method of flow visualization and system of intake duct starting |
| CN114018537A (en) * | 2021-10-21 | 2022-02-08 | 南京航空航天大学 | Wind tunnel internal flow field state detection device and method based on spatial three-dimensional silk thread array |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075870A (en) * | 2014-07-08 | 2014-10-01 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-speed wind tunnel fluorescent silk thread based on fiber threads and flow visualization method thereof |
| CN204220176U (en) * | 2014-11-02 | 2015-03-25 | 陈心如 | Test tube stand |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5945314B2 (en) * | 2014-11-27 | 2016-07-05 | 美津濃株式会社 | Airflow observation device |
-
2016
- 2016-12-05 CN CN201611104859.2A patent/CN106768813B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075870A (en) * | 2014-07-08 | 2014-10-01 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-speed wind tunnel fluorescent silk thread based on fiber threads and flow visualization method thereof |
| CN204220176U (en) * | 2014-11-02 | 2015-03-25 | 陈心如 | Test tube stand |
Non-Patent Citations (2)
| Title |
|---|
| 《一种高超声速内转式进气道流动特性研究》;李祝飞 等;《第八届全国高超声速科技学术会议论文摘要集》;20151230;第14页 * |
| 《高超声速内外流动激波/边界层相互作用的实验与数值研究》;黄舶;《中国博士学位论文全文数据库》;20131015(第10期);第C031-2页 * |
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