CN101078773A - Flow field visualization method and device - Google Patents
Flow field visualization method and device Download PDFInfo
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- CN101078773A CN101078773A CN 200710055770 CN200710055770A CN101078773A CN 101078773 A CN101078773 A CN 101078773A CN 200710055770 CN200710055770 CN 200710055770 CN 200710055770 A CN200710055770 A CN 200710055770A CN 101078773 A CN101078773 A CN 101078773A
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Abstract
The invention relates to a particle operation path imaging device and the visual method, belonging to observation and analysis technologies for liquid flow field. In the flow field visual device camera, light source, light shielding plate, condensing lens and vessel for particles are installed on the platform. The light source emits infrared or ultraviolet light and light beam is formed after lights passes through the light shielding plate and the condensing lens to irradiate the vessel for particles. Particles display their moving paths in liquid medium and by camera their moving paths are recorded. The invention is applied for imaging of particle, which can absorb black light. It can record particle moving path directly by common camera or digital camera and infrared or ultraviolet linear light source. High-speed CCD of PIV system, laser and analysis calculation software for particle correlation can be omitted so that system cost can be decreased greatly. The cost of invention is about 1/40-1/10 of cost of current common PIV.
Description
Technical field:
The present invention relates to fluid flow fields observation and analytical technology, especially at a kind of running orbit imaging device and method for visualizing of particle.
Background technology:
For many years, flow field visualization research is the more interested problems of people always.Along with optics, electronic image technology and development of computer, people begin to utilize electron image and computer technology to research and analyse the flow process of fluid, comprise flow field demonstration, speed and Density Distribution etc.And widely used FLOW VISUALIZATION analytical technology close with function of the present invention is particle image velocimetry technology (Particle Image Velocimetry is called for short PIV) at present.The ultimate principle of particle image velocimetry technology is, being entrained in equably in the flow field to be measured with the similar small trace particle of fluid density, make the variation of trace particle can reflect the variation in flow field realistically, using laser (sheet) to shine in the flow field then shines on the trace particle in other words, because the reflection of particle, the variation in flow field just can reflect by these laser light reflected.At this moment use the tangent plane that the flow field changes on the sheet laser under the extraordinary CCD cameras record of high speed again, just note the information in flow field, the information that the extraordinary CCD camera of these high speeds is taken is transferred in the computing machine by data line, special-purpose software for calculation is installed in the computing machine, this software can control system work, and provide flow field picture and result of calculation, as velocity distribution of flow field figure, particle density or the like.The basic comprising of PIV technological system comprises laser instrument, the extraordinary CCD camera of high speed, computing machine, analytical calculation software.The PIV system price does not wait to millions of at hundreds of thousands.The main shortcoming of particle image velocimetry technology (PIV) is: 1, cost an arm and a leg, at present the most cheap homemade PIV system price is more than 500,000 yuan, and the price of import is higher, all more than 1,000,000 yuan; 2, demonstration of the flow field of PIV and speed calculation are based on and add the cross correlation principle that shows particle, and by draw the flow trace and the speed of particle as complicated calculations such as Fourier integral transformations, this calculating has had influence on result's accuracy owing to heavy surplus error.
Summary of the invention
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of high-speed CCD and laser instrument and particle correlation analysis software for calculation that has saved the PIV system is provided, equipment is simple, a kind of flow field visual device that effect of visualization is good.
Another object of the present invention is at above-mentioned the deficiencies in the prior art, and a kind of flow field visualization method is provided.
The objective of the invention is to realize in the following manner: flow field visual device is camera 1, light source 2 are housed on platform 7, near light source 2 shadow shield 3 are housed, shadow shield 3 and condenser 4 and between certain distance is arranged, place on the platform 7 and contain particle vessel 5.
Flow field visualization method comprises following order and step:
A, make the demonstration particle, get 206 polystyrene 80-92%, nylon or atom ash 5-10%, fluorescent powder or infrared absorbent 3-10% by mass percentage and mix;
B, 210-230 ℃ of fusion of heating, fusion be after the granulating machine granulation, particle diameter 0.8-1.2mm, density 1.08g/cm3.
C, preparation fluid media (medium), fluid media (medium) is water and salt, its density is 1.08g/cm3.
D, will show that particle and fluid media (medium) place and contain particle vessel 5.
E, light source 2 send infrared ray or ultraviolet is contained particle vessel 5 by light tank 8 on the shadow shield 3 and condenser 4 formed light beam 6 irradiations, and particle shows its movement locus in fluid media (medium), by camera 1 its movement locus of record.
Purpose of the present invention can also realize in the following manner:
Light source 2, condenser 4, light beam 6, shadow shield 3, light tank 8 and contain particle vessel 5 on same straight line, and vertical with camera 1; Light source 2 is infrared light sources or ultraviolet light source; Shadow shield 3 is provided with long 80mm, wide 20mm light tank 8; Distance between shadow shield 3 and the condenser 4 is 20-50mm; Containing particle vessel 5 can be glass beaker, also can be the transparency vessel made of other materials preferably.
Beneficial effect: the present invention uses the particle imaging that absorbs invisible light, uses conventional camera or digital camera and infrared or ultraviolet light source, directly writes down the particle motion track; Save high-speed CCD and the laser instrument and the particle correlation analysis software for calculation of PIV system, reduced system cost significantly.Cost of the present invention approximately is 1/40 to 1/10 of a present general PIV price.
Description of drawings:
Fig. 1 is the flow field visual device structural drawing
Fig. 2 is the flow field visual device schematic diagram
Fig. 3 is the structural drawing of Fig. 1 shadow shield 3
1 camera, 2 light sources, 3 shadow shields, 4 condensers, 5 contain particle vessel, 6 light beams, 7 platforms, 8 light tanks.
Embodiment
Describe in further detail below in conjunction with drawings and Examples:
Embodiment 1:
Visualization system is contained the particle vessel by 1 camera, 2 light sources, 3 shadow shields, 8 light tanks, 4 condensers, 5 and is observed fluid and shows that particle and mounting platform 7 form, and its mounting structure as shown in Figure 1.Light source 2, condenser 4 and camera 1 can move on platform 7, so that obtain best illumination and imaging effect.Show that particle is mixed by 80g206 polystyrene, 10g nylon and 10g fluorescent powder, heat 210 ℃ of fully fusions, fuse after the granulating machine granulation particle diameter 0.8mm, density 1.05g/cm
3Fluid media (medium) is a water, and other regulates density with edible salt is 1.05g/cm
3Fluid diameter 120mm height 160mm glass beaker splendid attire.Ultraviolet light source 2 fronts add shadow shield 3, and long 80mm is arranged on the shadow shield 3, wide 2mm light tank 8.The 20mm place adds collector lens 4 (non-standard product, consigned processing as required) before the shadow shield 3, and collector lens 4 is apart from containing particle vessel 5 100mm.Camera 1 camera lens front end face is apart from containing particle vessel 5 100mm.Be used to observe as this routine system and contain particle vessel 5 flow fields after the artificial stirring, stir the about 5mm/s of back particle flow speed, can select shutter speed 1s, aperture 1/32 should be taken in the darkroom, and daytime, shooting should add optical filtering.
Embodiment 2:
The visualization system of present embodiment is contained the particle vessel by 1 camera, 2 light sources, 3 shadow shields, 8 light tanks, 4 condensers, 5 and is observed fluid and shows that particle and mounting platform 7 form, and its mounting structure as shown in Figure 1.Light source 2, condenser 4 and camera 1 can move on platform 7, so that obtain best illumination and imaging effect.Show that particle is mixed by 92g206 polystyrene, 5g atom ash, 3g infrared absorbent, heat 220 ℃ of fully fusions, fuse after the granulating machine granulation particle diameter 1.0mm, density 1.08g/cm
3Fluid media (medium) is a water, and other regulates density with edible salt is 1.08g/cm
3Fluid is contained particle vessel 5 splendid attires with diameter 120mm height 160mm.Infrared light sources 2 fronts add shadow shield 3, and long 80mm is arranged on the shadow shield 3, wide 2mm light tank 8.The 50mm place adds collector lens 4 (non-standard product, consigned processing as required) before the shadow shield 3, and collector lens 4 is apart from containing particle vessel 5 80mm.Camera 1 camera lens front end face is apart from containing particle vessel 5 200mm.Be used to observe beaker flow field after the artificial stirring as this routine system, stir the about 5mm/s of back particle flow speed, can select shutter speed 1s, aperture 1/32, daytime, shooting should add optical filtering.
Embodiment 3:
The visualization system of present embodiment is contained the particle vessel by 1 camera, 2 light sources, 3 shadow shields, 8 light tanks, 4 condensers, 5 and is observed fluid and shows that particle and mounting platform 7 form, and its mounting structure as shown in Figure 1.Light source 2, condenser 4 and camera 1 can move on platform 7, so that obtain best illumination and imaging effect.Show that particle is mixed by 85g206 polystyrene, 7g atom ash, 5g infrared absorbent, heat 230 ℃ of fully fusions, fuse after the granulating machine granulation particle diameter 1.2mm, density 1.08g/cm
3Fluid media (medium) is a water, and other regulates density with edible salt is 1.08g/cm
3Fluid is contained particle vessel 5 splendid attires with diameter 120mm height 160mm.Ultraviolet light source 2 fronts add shadow shield 3, and long 80mm is arranged on the shadow shield 3, wide 2mm light tank 8.The 35mm place adds collector lens 4 (non-standard product, consigned processing as required) before the shadow shield 3, and collector lens 4 is apart from containing particle vessel 5 50mm.Camera 1 camera lens front end face is apart from containing particle vessel 5 300mm.Be used to observe beaker flow field after the artificial stirring as this routine system, stir the about 5mm/s of back particle flow speed, can select shutter speed 1s, aperture 1/32, daytime, shooting should add optical filtering.
Claims (7)
1, a kind of flow field visual device is characterized in that, camera 1, light source 2 are housed on platform 7, shadow shield 3 are housed near light source 2, shadow shield 3 and condenser 4 and between certain distance is arranged, place to contain particle vessel 5 on the platform 7.
2, according to the described flow field visualization method of claim 1, it is characterized in that, light source 2, shadow shield 3, light tank 8, condenser 4, light beam 6 and contain particle vessel 5 on same straight line, and vertical with camera 1.
According to the described a kind of flow field visual device of claim 2, it is characterized in that 3, light source 2 is infrared light sources or ultraviolet light source.
According to the described flow field visual device of claim 2, it is characterized in that 4, shadow shield 3 is provided with long 80mm,, wide 20mm light tank 8.
According to claim 1 or 2 described flow field visual device, it is characterized in that 5, the distance between shadow shield 3 and the condenser 4 is 20-50mm.
According to the described flow field visual device of claim 1, it is characterized in that 6, containing particle vessel 5 can be glass beaker, also can be the transparency vessel made of other materials preferably.
7, according to the described flow field visualization method of claim 1, it is characterized in that, comprise following order and step:
A, make the demonstration particle, get 206 polystyrene 80-92%, nylon or atom ash 5-10%, fluorescent powder or infrared absorbent 3-10% by mass percentage and mix;
B, 210-230 ℃ of fusion of heating, fusion be after the granulating machine granulation, particle diameter 0.8-1.2mm, density 1.08g/cm3;
C, preparation fluid media (medium), fluid media (medium) is water and edible salt, its density is 1.08g/cm3;
D, will show that particle and fluid media (medium) place and contain particle vessel 5;
E, light source 2 send infrared ray or ultraviolet is contained particle vessel 5 by light tank 8 on the shadow shield 3 and condenser 4 formed light beam 6 irradiations, and particle shows its movement locus in fluid media (medium), by camera 1 its movement locus of record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100557706A CN100483150C (en) | 2007-06-18 | 2007-06-18 | Flow field visualization method and device |
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|---|---|---|---|
| CNB2007100557706A CN100483150C (en) | 2007-06-18 | 2007-06-18 | Flow field visualization method and device |
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| CN101078773A true CN101078773A (en) | 2007-11-28 |
| CN100483150C CN100483150C (en) | 2009-04-29 |
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| CNB2007100557706A Expired - Fee Related CN100483150C (en) | 2007-06-18 | 2007-06-18 | Flow field visualization method and device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538697A (en) * | 2011-05-25 | 2012-07-04 | 中国兵器工业集团第七○研究所 | Engine cylinder cover water chamber flow field visualization test method |
| CN102661912A (en) * | 2012-05-03 | 2012-09-12 | 东南大学 | Measuring device and measuring method for drag coefficient of irregular particle |
| CN102818690A (en) * | 2012-01-15 | 2012-12-12 | 洛阳理工学院 | Testing device for analyzing internal flow fields and pressure losses of silencer |
| CN103267622A (en) * | 2013-05-13 | 2013-08-28 | 中国航空工业集团公司沈阳空气动力研究所 | Device and method for measuring fluorescent oil flow friction force field |
| CN103344409A (en) * | 2013-05-09 | 2013-10-09 | 浙江理工大学 | Measurement apparatus using tracer particles to simulate gaseous phase flow field in high-speed spinning cup |
| CN104236847A (en) * | 2013-06-07 | 2014-12-24 | 长沙理工大学 | Method for measuring water-sand two-phase flow field by using particle image velocimetry technology |
| CN104469177A (en) * | 2014-12-19 | 2015-03-25 | 中国人民解放军国防科学技术大学 | Transient structure imaging method and device of supersonic moving fluid |
| CN104501737A (en) * | 2014-12-19 | 2015-04-08 | 中国人民解放军国防科学技术大学 | Device and method for positioning boundary of liquid jet spray |
| CN104897065A (en) * | 2015-06-09 | 2015-09-09 | 河海大学 | Measurement system for surface displacement field of shell structure |
| CN104931224A (en) * | 2015-06-16 | 2015-09-23 | 哈尔滨工业大学 | Device and method used for observing air flow field structure in environment of different degrees of vacuum |
| CN109154548A (en) * | 2016-04-29 | 2019-01-04 | 赫尔辛基大学 | The method and apparatus of Physico-Chemical Characterization for material |
| CN109580170A (en) * | 2018-12-28 | 2019-04-05 | 清华大学 | Liquid flow field is distributed detection method, apparatus and system in fluorescent tracing battery |
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| CN108195419B (en) * | 2017-12-21 | 2020-11-24 | 中山大学 | Novel fluid multi-field observation system and method |
-
2007
- 2007-06-18 CN CNB2007100557706A patent/CN100483150C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538697A (en) * | 2011-05-25 | 2012-07-04 | 中国兵器工业集团第七○研究所 | Engine cylinder cover water chamber flow field visualization test method |
| CN102818690B (en) * | 2012-01-15 | 2015-04-29 | 洛阳理工学院 | Testing device for analyzing internal flow fields and pressure losses of silencer |
| CN102818690A (en) * | 2012-01-15 | 2012-12-12 | 洛阳理工学院 | Testing device for analyzing internal flow fields and pressure losses of silencer |
| CN102661912A (en) * | 2012-05-03 | 2012-09-12 | 东南大学 | Measuring device and measuring method for drag coefficient of irregular particle |
| CN102661912B (en) * | 2012-05-03 | 2014-02-12 | 东南大学 | Measuring device and measuring method for drag coefficient of irregular particle |
| CN103344409A (en) * | 2013-05-09 | 2013-10-09 | 浙江理工大学 | Measurement apparatus using tracer particles to simulate gaseous phase flow field in high-speed spinning cup |
| CN103267622A (en) * | 2013-05-13 | 2013-08-28 | 中国航空工业集团公司沈阳空气动力研究所 | Device and method for measuring fluorescent oil flow friction force field |
| CN104236847A (en) * | 2013-06-07 | 2014-12-24 | 长沙理工大学 | Method for measuring water-sand two-phase flow field by using particle image velocimetry technology |
| CN104469177A (en) * | 2014-12-19 | 2015-03-25 | 中国人民解放军国防科学技术大学 | Transient structure imaging method and device of supersonic moving fluid |
| CN104501737A (en) * | 2014-12-19 | 2015-04-08 | 中国人民解放军国防科学技术大学 | Device and method for positioning boundary of liquid jet spray |
| CN104469177B (en) * | 2014-12-19 | 2018-02-02 | 中国人民解放军国防科学技术大学 | The transient buildup imaging method and device of a kind of Supersonic Motion fluid |
| CN104897065A (en) * | 2015-06-09 | 2015-09-09 | 河海大学 | Measurement system for surface displacement field of shell structure |
| CN104931224A (en) * | 2015-06-16 | 2015-09-23 | 哈尔滨工业大学 | Device and method used for observing air flow field structure in environment of different degrees of vacuum |
| CN109154548A (en) * | 2016-04-29 | 2019-01-04 | 赫尔辛基大学 | The method and apparatus of Physico-Chemical Characterization for material |
| CN109580170A (en) * | 2018-12-28 | 2019-04-05 | 清华大学 | Liquid flow field is distributed detection method, apparatus and system in fluorescent tracing battery |
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| CN100483150C (en) | 2009-04-29 |
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