CN106768813A - Hypersonic interior rotatable air intake duct and the wall silk thread display methods in distance piece flow field - Google Patents
Hypersonic interior rotatable air intake duct and the wall silk thread display methods in distance piece flow field Download PDFInfo
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- CN106768813A CN106768813A CN201611104859.2A CN201611104859A CN106768813A CN 106768813 A CN106768813 A CN 106768813A CN 201611104859 A CN201611104859 A CN 201611104859A CN 106768813 A CN106768813 A CN 106768813A
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- silk thread
- wall
- 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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of hypersonic interior rotatable air intake duct and the wall silk thread display methods in distance piece flow field, belong to hydrodynamics technology field, the method replaces the part wall of interior rotatable air intake duct and distance piece inner flow passage using transparent material, the transparent wall of side is used as observation, and multiple rows of micropore is processed on the transparent wall of opposite side；Silk thread is cemented after being penetrated through micropore on the outside of wall, and in outside wall surface paste context paper；During experiment, use up and be radiated on background paper, while shooting the wall silk thread flow pattern of interior flow field from opposite side；By multiple rows of silk thread micropore known to locus, optical distortion amendment can be carried out to silk thread flow pattern picture, make the interior flow field structure observed more accurately and reliably.The present invention is by expanding the potentiality of wall silk thread Display Technique, there is provided a kind of for interior rotatable air intake duct and the interior flow field Display Technique of distance piece, to recognize and understand the complicated three-dimensional flow structure of interior rotatable air intake duct and distance piece inside.
Description
Technical field
The invention belongs to hydrodynamics technology field, and in particular to hypersonic interior rotatable air intake duct and distance piece inside stream
A kind of display methods of field.
Background technology
Hypersonic interior rotatable air intake duct is captured and compressed that efficiency is higher to air-flow, and aerodynamic drag is smaller, and easily with
Circular chamber merges, and these advantages cause the extensive concern of domestic and international researcher.Due to interior rotatable air intake duct it is special three
Dimension structure type and resulting Three-dimensional Flow are very complicated, and traditional schlieren method is getable with pressure measurement method institute
Information of flow is more limited, it is difficult to which the three-dimensional flow structure of internal rotatable air intake duct obtains comprehensively understanding, deeper into it is careful
Analysis be not easy to carry out with understanding.
Wall silk thread display methods can show the dynamic silk thread flow pattern of near wall, such that it is able to judge flow direction and
Pattern of flow, has been obtained for being widely applied and develops in low speeds flow field." ultra-combustion ramjet starts document in shock tunnel
Wall silk thread display methods is expanded and is applied in shock tunnel, seen by the face pressure of machine three indentation air flue flow field experimental observation " (yellow oceangoing ship)
Measure the silk thread flow pattern on hypersonic three face pressures indentation air flue configuration external compression wall and side wall.Document is " in hypersonic
The wall silk thread of rotatable air intake duct flowing shows " (Li Zhufei) further apply the method in hypersonic interior rotatable air intake duct
External compression face on, flow separation zone scope that is directly perceived, dynamically showing external compression face near wall, and for turning in judging
Whether formula air intake duct starts.However, these trials are difficult to be applied directly to the internal flow ring of interior rotatable air intake duct and distance piece
In border.Accordingly, it would be desirable to develop suitable Flow visualisation method and measurement means, flowed with obtaining in interior rotatable air intake duct and distance piece
The complicated Three-dimensional Flow information in road.
The content of the invention
It is an object of the present invention 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 the complicated Three-dimensional Flow of interior rotatable air intake duct and distance piece inside
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 of side is used as observation, and multiple rows of micropore is processed on the transparent wall of opposite side；In silk thread is penetrated one by one through micropore
After runner, cemented on the outside of wall；The outside wall surface paste context paper of the transparent component of silk thread is being stained with, increase silk thread is carried on the back with conduct
The contrast of the transparent component of scape；During experiment, use up and be radiated on background paper, while shooting the wall of interior flow field from opposite 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 repaiied
Just, make the interior flow field structure observed more accurately and reliably.
Further, the inner flow passage part of hypersonic interior rotatable air intake duct and distance piece include air intake duct in compression section and
Distance piece, can be observed to a portion, it is also possible to which several parts are observed together.
Further, the inner flow passage wall to be observed can be processed all using transparent material, it is also possible to only in wall
Upper and lower both sides or the left and right sides are embedded in a pair transparent mounting blocks, and transparent material needs to ensure certain translucency, to ensure 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, to reduce optical distortion, it is also possible to
Do not carry out repairing type.
Further, the micropore processed on transparent wall should try one's best vertical with internal face holding, and micro well locations can be any,
The spread pattern of micropore can be the proper alignment such as square, circular array, it is also possible to irregular arrangement.
Further, after silk thread penetrates micropore on transparent wall, pasted on the outside of wall, it is also possible to noted in micropore
Enter glue to be fixed, or directly in internal face stickup silk thread.
Further, it is increase silk thread and the contrast of the transparent component as background, translucency is pasted on the outside of wall
Get well and the uniform white scraps of paper are used as background, it would however also be possible to employ other materials or other colors.
Further, from silk thread position, corresponding opposite side wall is shot, and shooting angle can be adjusted, it is also possible in silk thread
Homonymy shot.
Further, by multiple rows of silk thread micropore known to locus, optics can be carried out to silk thread flow pattern picture abnormal
Become amendment, it is also possible to correct by other means, do not correct even.
Principle of the invention is described as follows：
The inner flow passage part of hypersonic interior rotatable air intake duct and distance piece includes compression section and distance piece in air intake duct, under
Face illustrates 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
Form, internal face still use original inner flow passage molded line, the Profile Design of outside wall surface into simple shape, such as square or circle
Deng to reduce optical distortion；Or the main body of distance piece is using conventional opaque material, and in distance piece wall or so or up and down
Both sides are embedded in a pair transparent mounting blocks, and the internal face of the mounting blocks still keeps 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 to distance piece side does not deal with, as observation, and on the transparent wall of opposite side, processing
Multiple rows of micropore, micropore is tried one's best vertical with internal face holding, and the arrangement mode of micropore, spacing and coverage, visual observation need
Depending on；
3) by the silk thread of moderate length, the micropore for having processed is penetrated one by one, keep the free one end of silk thread in interior stream
Road, the other end cements silk thread with a small amount of glue in micropore from outside wall surface, while sealing micropore, this silk thread method of attaching
Can not only ensure that silk thread there are enough frees degree to follow the direction of local air-flow, and it is smaller to the interference of interior flow field；
4) after silk thread is pasted and finished, process being pasted with the outside wall surface of transparent component of silk thread, to increase silk thread
With the contrast of the transparent component as background, the good and uniform blank sheet of paper of translucency such as is pasted as background in outside wall surface,
Other trnaslucent materials or other colors can be used；
5) when carrying out wind tunnel experiment, it is radiated on the part for being stained with silk thread with light beam, silk thread stream is shown using transmitted light
Spectrum, is shot in other side；
6) because the 3D shape of transparent wall is complicated, the silk thread flow pattern picture that photographs it may happen that optical distortion,
Now, by multiple rows of silk thread micropore known to locus, optical distortion amendment can be carried out to silk thread flow pattern picture, so that
To accurate silk thread flow pattern.
Other inner flow passage parts of hypersonic interior rotatable air intake duct and distance piece can also be seen according to the above method
Survey.
The present invention compared with prior art, has 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, with reference to wall silk thread display methods, is obtained in that the wall silk thread flow pattern of interior flow field；
(2) present invention fixes silk thread using wall micropore, can not only ensure that silk thread has enough frees degree, to follow gas
The direction of stream, and reduce the interference to interior flow field；
(3) light path that the present invention is used is simple, can directly carry out the shooting of silk thread flow pattern, and field range is big；
(4) present invention can be made by multiple rows of silk thread micropore known to steric position on wall to three-dimensional wall
Into optical distortion be modified, make observe interior flow field structure more accurately and reliably.
Brief description of the drawings
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 silk thread distribution of hypersonic interior rotatable air intake duct and distance piece internal face
Schematic diagram.
Fig. 3 is the signal of example of the present invention for the interior flow field display methods of compression section in interior rotatable air intake duct
Figure.
Fig. 4 is the interior flow field display side that the present invention is embedded in compression section in a pair air intake ducts of transparent mounting blocks for wall
One schematic diagram of example of method.
Specific embodiment
To make the purpose of the present invention, technical solution and advantage and good effect become more apparent, below in conjunction with
Instantiation, and referring to the drawings, the present invention is described in more detail.
Fig. 1 is the present invention for hypersonic interior rotatable air intake duct and the distance piece interior flow field display side of isolation segment model
One schematic diagram of 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, light path 6, high-speed motion picture camera 7.
In instantiation, air intake duct external compression section 1 is processed jointly with compression section 2 in air intake duct, it is also possible to after separate machined
It is attached again；Distance piece 3 is individually processed using transparent material, is then connected by flange with compression section in air intake duct 2；Isolation
The internal face of section 3 still uses the molded line of original molded line, outside wall surface to simplify using cylinder；In the side of the wall of distance piece 3
Process multiple rows of micropore；During silk thread penetrated into micropore, and silk thread is cemented on the outside of wall；Then it is close to one on the outside of wall in vain
Coloured paper piece is used as background.
Operation principle：During wind tunnel experiment, the high light that light source 4 sends is dissipated by lens 5, and light path 6 is radiated at isolation
On the background paper of section outside wall surface, transmitted light illuminates all of wall silk thread in observation area；In the other side of distance piece, with a high speed
Video camera 7 is directly shot, and obtains the silk thread flow pattern of wind tunnel experiment condition lower wall surface.
Fig. 2 is an example of the present invention for the silk thread distribution of hypersonic interior rotatable air intake duct and distance piece internal face
Schematic diagram, Fig. 2 gives the silk thread distribution situation on distance piece internal face in Fig. 1 examples.As shown in Fig. 2 the silk of internal face
Line distribution includes distance piece 3 and wall silk thread 101.In instantiation, wall silk thread 101 is arranged in the inwall of the side of distance piece 3
On face, 30 × 6 silk threads are had, the flow direction distance and span distance between silk thread are consistent respectively, and wire length is also tried one's best
It is consistent；The diameter that the micropore of silk thread root is constrained on wall can not be too big, to reduce the interference of stream field.Operation principle：
Multiple rows of micropore is processed on the wall of the side of distance piece 3, micropore is tried one's best perpendicular to internal face；Wall silk thread 101 is inserted into micropore,
Make silk thread that certain length is kept inside wall, cut silk thread on the outside of wall afterwards and the one end by silk thread in micropore is glued
Jail；It is last to paste that translucency is good and the uniform white scraps of paper are used as background on the outside of wall.
Fig. 3 is the schematic diagram of example of the present invention for the interior flow field display methods of compression section in air intake duct, Fig. 3
Compared with Fig. 1 examples, the method used by both is identical, and application site has changed compression section in air intake duct into by distance piece.Such as Fig. 3 institutes
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
Blue 102.In instantiation, the separate machined of compression section 2 in air intake duct external compression section 1 and air intake duct is connected by adpting flange 102
Connect, flange design on the inside of wall, to reduce the interference to flow field on the outside of wall；Compression section 2 uses transparent material in air intake duct
Processing, processes multiple rows of micropore on the wall of its side, micropore is tried one's best vertical with internal face holding；During silk thread penetrated into micropore, and
Silk thread is cemented on the outside of the wall of compression section in the air intake duct, a white scraps of paper are then close on the outside of wall as background.
Operation principle is similar with Fig. 1 examples.
Fig. 4 is the interior flow field display side that the present invention is embedded in compression section in a pair air intake ducts of transparent mounting blocks for wall
One schematic diagram of example of method, compared with Fig. 3 examples, both applies the compression section in air intake duct, but in Fig. 4 examples
Wall do not have all transparent, simply slotted in two side and be embedded in transparent mounting blocks.As shown in figure 4, wall 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 plate 104 of detachable transparent mounting blocks.In instantiation, air intake duct external compression section
1 processes together with compression section in air intake duct 2, wherein simplifying to the outside wall surface shape of compression section in air intake duct 2；In interior compression
The groove of insertion is designed in 2 both sides of section, loads detachable transparent mounting blocks 103, and reinforced with cover plate 104；Detachable transparent mounting blocks
103 internal face still uses original inner flow passage molded line, and the molded line of outside wall surface is square；In the detachable transparent installation of side
Block 103 processes multiple rows of micropore, and micropore is tried one's best perpendicular to internal face；During silk thread penetrated into micropore, and the compression section in air intake duct
Wall outside cements silk thread；Then it is close to a white scraps of paper on the outside of wall as background.Operation principle and Fig. 3 example class
Seemingly.
Above-described instantiation, is carried out to the purpose of the present invention, technical solution and advantage and good effect
Further describe, should be understood that and the foregoing is only instantiation of the invention, be not limited to
Invention, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc., should be included in this hair
Within bright protection domain.
Claims (9)
1. the wall silk thread display methods in a kind of hypersonic interior rotatable air intake duct and distance piece flow field, it is characterised in that：It is 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 of side is used as to see
Survey, multiple rows of micropore is processed on the transparent wall of opposite side；After silk thread penetrates inner flow passage one by one through micropore, glued on the outside of wall
Jail；It is being stained with the outside wall surface paste context paper of the transparent component of silk thread, the contrast of increase silk thread and the transparent component as background
Degree；During experiment, use up and be radiated on background paper, while shooting the wall silk thread flow pattern of interior flow field from opposite side；By space
Multiple rows of silk thread micropore known to arrangement position, can carry out optical distortion amendment to silk thread flow pattern picture, make the inside observed
Flow field structure is more accurately and reliably.
2. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：The inner flow passage part of hypersonic interior rotatable air intake duct and distance piece includes compression section and isolation in air intake duct
Section, can be observed, it is also possible to which several parts are observed together to a portion.
3. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：The inner flow passage wall to be observed can be processed all using transparent material, it is also possible to only in wall upper and lower two
Side or the left and right sides are embedded in a pair transparent mounting blocks, and transparent material needs to ensure certain translucency, with the silk for ensureing to shoot
Line chart piece is high-visible.
4. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：The molded line of inner flow passage outside wall surface can be modified as simple shape, to reduce optical distortion, it is also possible to not carry out
Repairing type.
5. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：The micropore processed on transparent wall should try one's best vertical with internal face holding, and micro well locations can be any, micropore
Spread pattern can be the proper alignment such as square, circular array, it is also possible to irregular arrangement.
6. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：After silk thread penetrates micropore on transparent wall, pasted on the outside of wall, it is also possible to glue is injected in micropore
It is fixed, or directly in internal face stickup silk thread.
7. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：It is the contrast of increase silk thread and the transparent component as background, translucency is pasted on the outside of wall good and equal
The even white scraps of paper are used as background, it would however also be possible to employ other materials or other colors.
8. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：From silk thread position, corresponding opposite side wall is shot, and shooting angle can be adjusted, it is also possible in the homonymy of silk thread
Shot.
9. the wall silk thread display methods in hypersonic interior rotatable air intake duct according to claim 1 and distance piece flow field,
It is characterized in that：By multiple rows of silk thread micropore known to locus, optical distortion amendment can be carried out to silk thread flow pattern picture,
Can also by other means correct, not correct even.
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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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|---|---|---|---|
| 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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| CN106768813A true CN106768813A (en) | 2017-05-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999845A (en) * | 2018-09-06 | 2018-12-14 | 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108999845A (en) * | 2018-09-06 | 2018-12-14 | 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 |
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| 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 |
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