CN108627478A - Soot measuring device in the stable state flame of a kind of combination light extinction method and radiant light - Google Patents
Soot measuring device in the stable state flame of a kind of combination light extinction method and radiant light Download PDFInfo
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- CN108627478A CN108627478A CN201810430463.XA CN201810430463A CN108627478A CN 108627478 A CN108627478 A CN 108627478A CN 201810430463 A CN201810430463 A CN 201810430463A CN 108627478 A CN108627478 A CN 108627478A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
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Abstract
The invention discloses soot measuring devices in the stable state flame of a kind of combination light extinction method and radiant light, are related to the combustion field of dynamic power machine, this experimental provision includes soot delustring test system and soot radiation optical tests system；Soot delustring test system includes LED light, diffusion sheet, convex lens and a first high-speed digital camera for loading narrow pass filter piece；Soot radiation optical tests system includes the second high-speed digital camera of convex lens, light splitting piece and a second narrow pass filter piece of load；The spatial distribution of amount of soot can be obtained by soot extinction coefficient；The overall strength that soot radiant light projects under setted wavelength on optical path can be obtained by soot radiation optical tests system and light intensity caliberating device；Then in conjunction with extinction coefficient of the soot on optical path that background extinction coefficient obtains, the Temperature Distribution that three-dimensional reconstruction obtains soot is carried out to soot radiation picture in stable state flame further according to radiation transfer equation.
Description
Technical field
The present invention relates to research fields more particularly to a kind of combination delustrings such as basis burning and the burning of dynamic power machine
Soot measuring device in the stable state flame of method and radiant light.
Background technology
Soot Formation oxidation process in flame contains extremely complex physical phenomenon and chemical dynamics process, is related to
A large amount of intermediate species for being difficult to quantitative measurment so that the understanding that oxidation process is generated to it is also extremely limited, therefore is badly in need of exploitation
More structurally sound optical diagnostic method, realization more comprehensively and accurately measure soot transient response under various work condition environments.
In recent years, in order to promote the understanding to Soot Formation oxidation process, a variety of optical diagnostic methods have been developed；Duochrome method is based on
Two kinds of different wave lengths radiate light intensity, can realize quantitative measurment to transient state amount of soot and its temperature.But due to soot different layers
The influence of face signal self-priming so that its test result has very big uncertainty.With high-speed digital camera and advanced light source
Development, a kind of diffusion are penetrated bias light delustring technology and are applied in the world, but this technology cannot obtain the letter of soot temperature
Breath.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of influence considering soot self-absorption light, realizes to stable state fire
The measuring device of amount of soot and soot temperature synchro measure in flame；The measuring device by soot to the Extinction Characteristic of bias light and
The radiation characteristic of soot itself combines, and is imaged using high-speed digital, can capture the generation of soot in stable state flame simultaneously
Amount and soot temperature, to overcome the deficiencies in the prior art.
The present invention achieves the above technical objects by the following technical means：
Soot measuring device in the stable state flame of a kind of combination light extinction method and radiant light, including soot delustring test system and
Soot radiates optical tests system；The soot delustring test system is used to obtain the production quantity of soot in stable state flame；The carbon
Cigarette radiates optical tests system and tests the local extinction coefficient k that system obtains according to soot delustringλObtain soot temperature in stable state flame
Degree；The soot delustring test system includes that LED light, diffusion sheet, convex lens, the first narrow pass filter piece and first are high from right to left
Fast digital camera；Combuster is set between the diffusion sheet and convex lens；First is offered at left and right sides of the combustion chamber
Optical window and the second optical window；It is provided with fuel injector in the combustion chamber；The convex lens and the first narrow pass filter piece it
Between be provided with spectroscope；First high-speed digital camera triggers LED light, and it is the first high-speed digital camera to make the pulse frequency of LED light
Half, a photo can be obtained in this way and had powerful connections light, a background is without bias light, a series of pictures so staggeredly, so
Interpolation calculates the Fire Radiation intensity for obtaining each moment；
The soot radiation optical tests system includes spectroscope, the second narrow pass filter piece and the second high-speed digital camera；Institute
The first high-speed digital camera and the second high-speed digital camera is stated to arrange in 90 ° of angles；The first high-speed digital camera passes through conducting wire
It is connected respectively with the second high-speed digital camera, LED light；The pulse frequency of second high-speed digital camera and the first high-speed digital phase
The pulse frequency of machine is identical.
Further, the wave of the first narrow pass filter piece placed before the first high-speed digital camera and light at LED light crest value
Long consistent, the light of this wavelength can enter in the first high-speed digital camera.
Further, the bias light for a branch of diffusion that can be obtained by LED light and diffusion sheet, to reduce schlieren effect to carbon
The influence of smoke measurement accuracy.
Further, in combustion process, LED light and the second high-speed digital phase are triggered by the first high-speed digital camera
Machine realizes the synchro measure to amount of soot and soot temperature.
Further, the wavelength for the second narrow pass filter piece placed before the second high-speed digital camera is higher, and soot radiation is strong
Degree increases with wavelength, improves signal-to-noise ratio.
To assume the stable state soot flame under quasi-static environments as symmetrical structure, testing system by soot delustring can obtain
The KL factors for obtaining soot totality, carry out three-dimensional reconstruction to it, can obtain local extinction coefficient (kλ).Then according to Mie scattering
Principle obtains the volume fraction distribution of soot；It is projected on optical path by the radiant light of caliberating device acquisition soot total strong
Spend (Ir)。
For the light of setted wavelength (λ), the overall intensity of radiation (I in optical path projectionr) it is each soot layer office
Portion spectral radiance (kλIb) and self-absorption light difference aggregated result；It is any on optical path according to Beer-Lamert principles
The radiation intensity of position (y) soot penetrates black matrix light intensity after living through subsequent path extinction and can indicate as follows：
Wherein, ymaxFor soot apart from the nearest coordinate in perspective plane on optical path, y ' is from soot y location to ymaxArbitrarily
Coordinate on soot layer optical path.Therefore, the intensity totally projected in each pixel can indicate as follows：
yminFor the farthest coordinate apart from perspective plane on soot layer optical path；Optical tests system is radiated according to soot to obtain
Overall drop shadow intensity (I at each pixelr), the extinction coefficient (k obtained then in conjunction with soot delustring test systemλ) to carbon
Cigarette radiation image carries out three-dimensional reconstruction and can get local spectral radiance (k againλIb), and then obtain blackbody radiation intensity (Ib)。
Finally soot temperature spatially is can get according to Planck law (Plank) to be distributed.
Advantageous effect：
1, more traditional double color temperature measuring method is compared, the self-absorption light that this technology considers soot influences, makes to measure amount of soot and carbon
Smoke temperature degree is more accurate.
2, this extinction coefficient can capture soot transient state evolution in flame, compare more traditional laser induced incandescence
Method and dot laser light extinction method, this technology have good space-time characterisation.
3, this technology can radiate picture by soot and accurately be divided to Soot Formation region, and then can use this soot
Region deviding extinction coefficient obtains soot region in picture and eliminates the uncertainty brought by liquid phase Mie scattering and schlieren effect
It influences.
Description of the drawings
Fig. 1 be the present invention relates to combination light extinction method and radiant light stable state flame in soot measuring device schematic diagram.
1, LED light 2, diffusion sheet 3, combustion chamber 4, test flame 5, fuel injector 6, the first optical window 7, convex lens
8, spectroscope 9, the first narrow pass filter piece 10, the first high-speed digital camera 11, the second narrow pass filter piece 12, the second high speed number
Code camera 13, the second optical window.
Specific implementation mode
Invention is further explained below in conjunction with the accompanying drawings.
A branch of high-speed pulse, which is generated, by LED light 1 and diffusion sheet 2 spreads bias light, after bias light passes through flame, soot
System is tested in delustring and soot radiation optical tests system penetrates rear remaining bias light and soot radiant light is added by convex lens 7
The the first high-speed digital camera 10 for carrying the first narrow pass filter piece 9 receives；I.e. by one Beer law of lambert (Beer-lambert)
The KL factors of the soot in transient state flame can be calculated, and then obtain the quality and volume fraction of soot.
The first high-speed digital camera 10 is triggered simultaneously in triggering fuel injector fuel injection signal, then passes through the first high-speed digital phase
Machine 10 triggers LED light 1 and the second high-speed digital camera 12, and sets LED light output frequency as the first high-speed digital camera 10
Half, 12 frequency of the second high-speed digital camera are consistent with the first high-speed digital camera 10；The light beam of LED light 1 passes through diffusion
Piece 2 generates a branch of diffusion bias light for covering entire flame, after spreading bias light across soot, remaining diffusion bias light
The radiant light of intensity and soot itself corresponding with the first narrow 9 wavelength of pass filter piece be each passed through convex lens 7, spectroscope 8 and
First narrow pass filter piece 9 is received by the first high-speed digital camera 10；At the same time, soot corresponding with the second narrow pass filter piece 11
The radiant light of itself is received by convex lens 7, spectroscope 8 and the second narrow pass filter piece 11 by the second high-speed digital camera 12.
By 10 obtained picture of the first high-speed digital camera, by soot delustring radiating system according to Beer-lambert originals
Reason, which calculates, obtains totality KL values on soot optical path.Assuming that the stable state soot flame under quasi-static environments is symmetrical structure, it is right
Soot flame carries out the optical extinction coefficient that three-dimensional reconstruction stripping (onion method) obtains part.Then carbon is obtained according to Mie scattering principle
The volume fraction of cigarette is distributed (fv), shown in following formula.
keFor dimensionless factor, it can be calculated and be obtained by Rayleigh-Debye-Gans principles.
One tungsten bandgap calibration lamp is placed into flame same position, changes calibration lamp current, obtains calibration lamp in difference
Intensity under radiation intensity on 12 picture of the second high-speed digital camera, and then obtain target irradiation intensity and radiation diagram on piece number
The linear relationship of code intensity.Then, the soot radiation picture that the second high-speed digital camera 12 captures is calculated and obtains soot in light
Radiation intensity on ways for education diameter.Next, indicative of local optical extinction coefficient pair the second high speed number obtained in conjunction with soot extinction coefficient
The radiation picture that code camera 12 obtains carries out three-dimensional reconstruction, obtains local blackbody radiation intensity.Finally according to Planck law
(Plank) Temperature Distribution for obtaining soot is calculated.
The embodiment is the preferred embodiments of the present invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification all belongs to the scope of protection of the present invention.
Claims (5)
1. soot measuring device in the stable state flame of a kind of combination light extinction method and radiant light, which is characterized in that including soot delustring
Test system and soot radiate optical tests system；The soot delustring test system is used to obtain the generation of soot in stable state flame
Amount；The soot radiation optical tests system tests the local extinction coefficient k λ that system obtains according to soot delustring and obtains stable state flame
Middle soot temperature；
The soot delustring test system includes LED light (1), diffusion sheet (2), convex lens (7), the first narrow pass filter from right to left
Piece (9) and the first high-speed digital camera (10)；Combuster (3) is set between the diffusion sheet (2) and convex lens (7)；It is described
The first optical window (6) and the second optical window (13) are offered at left and right sides of combustion chamber (3)；It is set in the combustion chamber (3)
It is equipped with fuel injector (5)；It is provided with spectroscope (8) between the convex lens (7) and the first narrow pass filter piece (9)；First high speed number
Code camera (10) triggers LED light (1), and it is the half of the first high-speed digital camera (10) to make the pulse frequency of LED light (1), in this way
A photo can be obtained to have powerful connections light, a background is without bias light, a series of pictures so staggeredly, and then interpolation calculation obtains
Obtain the Fire Radiation intensity at each moment；
The soot radiation optical tests system includes spectroscope (8), the second narrow pass filter piece (11) and the second high-speed digital camera
(12)；The first high-speed digital camera (10) is arranged with the second high-speed digital camera (11) in 90 ° of angles；The first high speed number
Code camera (10) is connected with the second high-speed digital camera (11), LED light (1) respectively by conducting wire；Second high-speed digital camera
(11) pulse frequency is identical as the pulse frequency of the first high-speed digital camera (10).
2. soot measuring device in the stable state flame of a kind of combination light extinction method according to claim 1 and radiant light, special
Sign is, the first narrow pass filter piece (9) placed before the first high-speed digital camera (10) and light at LED light (1) crest value
Consistent wavelength, the light of this wavelength can enter in the first high-speed digital camera (10).
3. soot measuring device in the stable state flame of a kind of combination light extinction method according to claim 1 and radiant light, special
Sign is, the bias light for a branch of diffusion that can be obtained by LED light (1) and diffusion sheet (2), to reduce schlieren effect to amount of soot
The influence of measurement accuracy.
4. soot measuring device in the stable state flame of according to claim a kind of combination light extinction method and radiant light, feature
It is, in combustion process, LED light (1) and the second high-speed digital camera (12) is triggered by the first high-speed digital camera (10),
Realize the synchro measure to amount of soot and soot temperature.
5. soot measuring device in the stable state flame of according to claim a kind of combination light extinction method and radiant light, feature
It is, the wavelength for the second narrow pass filter piece (11) placed before the second high-speed digital camera (12) is higher, and soot radiation is strong
Degree increases with wavelength, improves signal-to-noise ratio.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810430463.XA CN108627478B (en) | 2018-05-08 | 2018-05-08 | Extinction method and radiant light combined carbon smoke measuring device in steady-state flame |
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| CN201810430463.XA CN108627478B (en) | 2018-05-08 | 2018-05-08 | Extinction method and radiant light combined carbon smoke measuring device in steady-state flame |
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| CN108627478B CN108627478B (en) | 2020-03-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724981A (en) * | 2018-12-25 | 2019-05-07 | 江苏大学 | Soot apparatus for quantitatively and method in a kind of flame using radiant light |
| CN110632036A (en) * | 2019-08-22 | 2019-12-31 | 江苏大学 | Device and method for jointly measuring soot precursor and soot based on optical engine |
| CN114046883A (en) * | 2021-10-27 | 2022-02-15 | 东南大学 | Method and device for simultaneously reconstructing flame temperature and soot concentration distribution and storage medium |
| CN114216509A (en) * | 2021-12-14 | 2022-03-22 | 天津大学 | System and method for measuring temperature and volume fraction of soot particulate matter based on LED light source |
| CN114923866A (en) * | 2022-04-11 | 2022-08-19 | 哈尔滨工程大学 | Gas-liquid two-phase flow same-field testing system and processing method based on schlieren and MIE method |
| CN115639124A (en) * | 2022-11-16 | 2023-01-24 | 哈尔滨工业大学 | Device and method for realizing soot concentration measurement and in-situ calibration by using single-wavelength laser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680475A (en) * | 2012-04-28 | 2012-09-19 | 北京理工大学 | Device and method for rapidly measuring carbon black concentration in laminar flow diffusion flames based on parallel light |
| CN203745204U (en) * | 2013-07-12 | 2014-07-30 | 江苏大学 | Visual testing device for spraying and combustion dynamic conditions in diesel engine cylinder |
| CN105424558A (en) * | 2015-11-03 | 2016-03-23 | 上海理工大学 | Combustion particle multi-parameter measurement device and method adopting blue-ray back lighting |
| CN105466491A (en) * | 2015-12-28 | 2016-04-06 | 中国科学院武汉物理与数学研究所 | Imaging-type combustion temperature and concentration measurement device based on dual-channel molecule optical filtering |
| CN107144503A (en) * | 2017-05-19 | 2017-09-08 | 上海理工大学 | Liquid fuel spray burning drop and flame synchronous measuring apparatus and method |
-
2018
- 2018-05-08 CN CN201810430463.XA patent/CN108627478B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680475A (en) * | 2012-04-28 | 2012-09-19 | 北京理工大学 | Device and method for rapidly measuring carbon black concentration in laminar flow diffusion flames based on parallel light |
| CN203745204U (en) * | 2013-07-12 | 2014-07-30 | 江苏大学 | Visual testing device for spraying and combustion dynamic conditions in diesel engine cylinder |
| CN105424558A (en) * | 2015-11-03 | 2016-03-23 | 上海理工大学 | Combustion particle multi-parameter measurement device and method adopting blue-ray back lighting |
| CN105466491A (en) * | 2015-12-28 | 2016-04-06 | 中国科学院武汉物理与数学研究所 | Imaging-type combustion temperature and concentration measurement device based on dual-channel molecule optical filtering |
| CN107144503A (en) * | 2017-05-19 | 2017-09-08 | 上海理工大学 | Liquid fuel spray burning drop and flame synchronous measuring apparatus and method |
Non-Patent Citations (2)
| Title |
|---|
| BIN YANG ET AL.: "Simultaneous measurements of fine and coarse droplets of wet steam in a 330MW steam turbine by using imaging method", 《J POWER AND ENERGY》 * |
| 曹嘉伟等: "柴油燃烧火焰中碳烟生成的特性试验", 《内燃机学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724981A (en) * | 2018-12-25 | 2019-05-07 | 江苏大学 | Soot apparatus for quantitatively and method in a kind of flame using radiant light |
| CN110632036A (en) * | 2019-08-22 | 2019-12-31 | 江苏大学 | Device and method for jointly measuring soot precursor and soot based on optical engine |
| CN114046883A (en) * | 2021-10-27 | 2022-02-15 | 东南大学 | Method and device for simultaneously reconstructing flame temperature and soot concentration distribution and storage medium |
| CN114046883B (en) * | 2021-10-27 | 2023-12-22 | 东南大学 | Simultaneous reconstruction method and device for flame temperature and soot concentration distribution and storage medium |
| CN114216509A (en) * | 2021-12-14 | 2022-03-22 | 天津大学 | System and method for measuring temperature and volume fraction of soot particulate matter based on LED light source |
| CN114216509B (en) * | 2021-12-14 | 2023-06-27 | 天津大学 | System and method for measuring temperature and volume fraction of soot particles based on LED light source |
| CN114923866A (en) * | 2022-04-11 | 2022-08-19 | 哈尔滨工程大学 | Gas-liquid two-phase flow same-field testing system and processing method based on schlieren and MIE method |
| CN115639124A (en) * | 2022-11-16 | 2023-01-24 | 哈尔滨工业大学 | Device and method for realizing soot concentration measurement and in-situ calibration by using single-wavelength laser |
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