CN105222828B - Synchronization measurement device for wall-adherent jet speed field and concentration field and method - Google Patents
Synchronization measurement device for wall-adherent jet speed field and concentration field and method Download PDFInfo
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- CN105222828B CN105222828B CN201510644060.1A CN201510644060A CN105222828B CN 105222828 B CN105222828 B CN 105222828B CN 201510644060 A CN201510644060 A CN 201510644060A CN 105222828 B CN105222828 B CN 105222828B
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- 238000005259 measurement Methods 0.000 title abstract description 16
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- 239000001301 oxygen Substances 0.000 claims abstract description 80
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 80
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- 239000000523 sample Substances 0.000 claims description 22
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- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- -1 aromatic hydrocarbon organic compound Chemical class 0.000 claims description 6
- 229920002521 macromolecule Polymers 0.000 claims description 6
- CUIWZLHUNCCYBL-UHFFFAOYSA-N decacyclene Chemical compound C12=C([C]34)C=CC=C4C=CC=C3C2=C2C(=C34)C=C[CH]C4=CC=CC3=C2C2=C1C1=CC=CC3=CC=CC2=C31 CUIWZLHUNCCYBL-UHFFFAOYSA-N 0.000 claims description 5
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- IUGYQRQAERSCNH-UHFFFAOYSA-N pivalic acid Chemical compound CC(C)(C)C(O)=O IUGYQRQAERSCNH-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 3
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- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a synchronization measurement device for a wall-adherent jet speed field and a concentration field, consisting of a coal-powder boiler modularized device, an oxygen sensitive coating wall surface, a high speed CCD camera, a PIV camera, a high intensity excitation light source, a pulse laser sheet light source, an uniform mixing chamber, a synchronization controller and a computer. The PIV camera is utilized to shoot the flowing track of PIV particles in a main air flow in the wall-adherence jet, the high speed CCD camera is utilized to shoot the color rendering rule of the oxygen sensitive coating wall surface along the change of the oxygen concentration in the jet, and the synchronization measurement of the speed field and the concentration field in the process of mutual interaction of the wall-adherence jet and the main flow is realized through the controller regulating and controlling the interval frame working mode between the PIV camera and the high speed CCD camera. . The invention realizes the synchronization measurement in the process of air-air mutual interaction, which not only obtains the turbulence flowing characteristics of the wall adherence jet, but also obtains component transportation characteristics of the specific component in the jet air. The invention benefits the comprehensive understanding the convection movement of the jet air and the diffusion process, and provides reference to the optimization design and the operation parameter of the nozzle.
Description
Technical field
The invention belongs to Multiphase Flow parameter measuring technical field, more particularly to a kind of wall-jets velocity field and concentration
The method for synchronously measuring and device of field.
Background technology
Face-fired boiler controls NOx emission frequently with Researched of Air Staging Combustion Burning Pulverized Coal mode, but fractional combustion can produce deep-etching
Property gas, be highly vulnerable to breakage the iron oxide diaphragm of water-cooled wall surface, there is serious high temperature corrosion so as to cause water-cooling wall.Mesh
Before, introduce wall-jets and form air film, stop effect of the corrosive gas to wall, it is that solution face-fired boiler water-cooling wall is high
Warm etching problem most efficient method.However, how to organize wall-jets to prevent high temperature corrosion is but that safe operation of the boiler runs into
A new problem, it would be highly desirable to solve.
The stop air film that wall-jets are formed need to meet following primary condition：
(1) enough film overcast rates：This is the precondition of air film function, only covers whole corrosion area,
Air film is possible to retardance stove inward turning flow field；
(2) adherent air film oxygen concentration is not less than 2%：When near wall atmospheric oxygen concentration is more than 2%, corrosive gas concentration
Sufficiently small and be not susceptible to high temperature corrosion, this is the necessary condition that air film plays anti-corrosion function；
(3) jet gas ratio is not higher than 5%：Excessive jet tolerance can weaken the effect of Researched of Air Staging Combustion Burning Pulverized Coal, and
Easily flowing in interference stove, and then influence burning behavior in stove；
(4) in specific region film forming：Load and fuel change need to carry out the adjustment of aerodynamic field, and this can cause corrosivity
The change of air-flowing environment, perishable region is also accordingly shifted, and the corresponding adjustment requirement air film of fluidic operations parameter follows corrosion area
It is mobile.As can be seen here, air film internal speed and concentration field are the important indicators of the effective film forming of wall-jets, obtain these information
Adjustment for wall-jets operating parameter is of crucial importance.
However, the measuring method of routine can only independent measurement gas velocity field.For gas concentration, mainly there are two kinds of surveys
Amount method：A. sampling test point is arranged in flow field, extracting sample by probe carries out the acquisition such as chemical analysis, gas chromatographic analysis
Measuring point concentration value；B., laser or ultrasonic transmitter are set outside flow field, are divided by being compared through the feedback signal wave spectrum of gas
Inverting obtains concentration value after analysis, SVEL decay.Method A belongs to contact type measurement, and the easy interference flowing field of sample probe, measurement is missed
Difference is big, though and method B belongs to non-contact measurement, feedback signal contains laser or sound wave travels through the information of stroke, measures
Concentration value be two-dimensional linear average value.Meanwhile, both approaches are typically limited only to spot measurement, though have discrete based on grid
The multi-point measurement system of change, but be also difficult to accurately represent face domain concentration information.It follows that traditional measuring method cannot meet
The requirement of synchro measure velocity field and concentration field.
Therefore, the present invention be exactly under such background propose one kind can synchro measure wall-jets velocity field and
The method and apparatus of concentration field.
The content of the invention
Goal of the invention：When the present invention interacts for wall-jets with eddy flow, main flow, it is difficult to which the accurate jet that obtains is in master
Velocity field in stream, and wall-jets are in the diffusion process of main flow, it is impossible to concentration field of oxygen component etc. is obtained in real time asks
Topic, there is provided the synchronous measuring apparatus and method of a kind of wall-jets concentration field and velocity field.
Technical scheme：In order to solve the above technical problems, the present invention provides the same of a kind of wall-jets velocity field and concentration field
Step measurement apparatus, including the quick coating wall of coal-powder boiler modelling device, oxygen, high speed CCD camera, PIV cameras, high intensity excitation light
Source, pulse laser sheet laser, mixed room, isochronous controller and computer, wherein：
Described coal-powder boiler modelling device constitutes concave shape part, the quick painting of oxygen by transparent part for front sight, left plate and right form
Layer wall collectively constitutes circumferential closed device body with the concave shape part, and described device body bottom portion enters for mainstream gas
Mouthful, top is gas vent, and left plate is offered at the quick coating wall of nearly oxygen and is further opened with efflux nozzle, and same absolute altitude
Eddy flow spout；
The pulse laser sheet laser is set up in above air stream outlet, is directed downward, and is freely rotatable, and makes sheet laser parallel
Or perpendicular to the quick coating wall of oxygen, can be moved freely along parallel or perpendicular to the quick coating wall direction of oxygen, flow field section is presented
Velocity field information；
The high intensity excitation light source is positioned over coal-powder boiler modelling device outside, the right opposite of the quick coating wall of oxygen, high-strength
Degree excitation light source inwardly irradiates through transparent part for front sight, can cover the quick coating wall of whole oxygen；
Described room of mixing is placed in coal-powder boiler modelling device outside, for uniform mixture of oxygen, nitrogen and PIV spikes grain
Son, mixed Dual-Phrase Distribution of Gas olid is entered in coal-powder boiler modelling device by efflux nozzle；
Described mixing chamber is placed in coal-powder boiler modelling device outside, for uniform mixing nitrogen and carbon monoxide, after mixing
Air-flow entered in coal-powder boiler modelling device by eddy flow spout and main flow inlet；
Described high speed CCD camera is arranged at coal-powder boiler modelling device outside, the right opposite of the quick coating wall of oxygen, camera
The quick coating wall of alignment lenses oxygen, the photo of shooting is transmitted to computer disposal；
Described PIV cameras are arranged at coal-powder boiler modelling device outside, when the quick coating wall of sheet laser and oxygen is parallel,
PIV cameras are arranged in the right opposite of transparent part for front sight, and when the quick coating wall of sheet laser and oxygen is vertical, PIV cameras are arranged in right form
Right opposite, the photo of shooting transmitted to computer disposal；
Described isochronous controller encourages light source, high speed CCD camera, PIV with pulse laser sheet laser, high intensity respectively
Camera is connected with computer, and its effect is high speed CCD camera and PIV cameras is taken turns to operate, while making pulse laser piece light
Source and PIV cameras, high intensity excitation light source and high speed CCD camera work simultaneously；
Described computer is connected with high speed CCD camera, PIV cameras and controller, is taken the photograph from high-speed CCD for storing
The data of camera and PIV cameras, and image procossing is carried out, obtain tangent plane velocity field and wall concentration field.
In one embodiment, the right form and left plate open up fluted in the plate edge of open side, groove
Internal face is stained with sealing mat, and the quick coating wall of oxygen collectively constitutes four face closures after inserting groove with concave shape part
Device body.
Preferably, the transparent part for front sight and right form are made up of high-purity transparent plexiglass plate, and left plate is by rubber slab system
Into.
Specifically, the quick coating wall of described oxygen is made up of rectangle PVC board, and a side surface is plane or well-regulated convex
Face, it is shaped as any one in semicircle, equilateral triangle or rectangle, and convex side bottom spray-coated white paint is uniformly covered above
, by a certain percentage be supported on host material probe molecule material by physisorphtion by lid host material.
More specifically, when convex surface is for semicircle, its diameter D=1/50~1/30W, when convex surface is equilateral triangle, its
Length of side L=1/50~1/30W, when convex surface is rectangle, its bottom surface X=1/50~1/30W, H=1/3~1/2X high, wherein, W
It is the width of the quick coating wall of oxygen.
Preferably, the main component of described host material be silicon-containing polymer in macromolecule matrix, fluoro containing polymerses,
Glassy polymer；Described probe molecule material is pyrene class, the decacyclene Lei in multiring aromatic hydrocarbon organic compound He perylene class.
The present invention proposes the method for synchronously measuring of a kind of wall-jets velocity field and concentration field simultaneously, it is characterised in that
Comprise the following steps：
(1) a certain proportion of probe molecule material is loaded on host material, being sprayed at surface has certain convex shape
White wall on, be prepared into the quick coating wall of oxygen；
(2) oxygen, nitrogen and PIV trace particles are uniformly mixed in proportion in mixed room, is laterally flowed by efflux nozzle
The quick coating wall of peroxide, while carbon monoxide and nitrogen are uniformly mixed in proportion in mixing chamber, by eddy flow spout and main flow
Entrance is introduced in coal-powder boiler modelling device, is interacted with wall-jets；
(3) using the high intensity excitation light source irradiation quick coating wall of oxygen, excite probe molecule to send fluorescence, luminous intensity with
Surface oxygen concentration is inversely proportional, the luminous intensity inspired using high speed CCD camera record, according to Stern-Volmer formula, leads to
Graphical analysis is crossed, the colour developing on the quick coating wall top layer of oxygen under the conditions of different oxygen concentrations, probe molecule species, load percentage is obtained
Rule；
(4) the coal-powder boiler modelling device using the quick coating wall of oxygen as jet film forming wall, overhead stream exit are built
Arrangement pulse laser sheet laser, high speed CCD camera and PIV cameras, oblique surface are set up in the front of the quick coating wall of oxygen
Set excitation light source, isochronous controller triggering sheet laser and excitation light source every frame work, and with high speed CCD camera and PIV phases
Machine works asynchronously, and the wall image of the tangent plane velocity field and excitation light source irradiation irradiated by sheet laser is caught respectively, at image
The velocity field of tangent plane and the concentration field of wall are obtained after reason.
Wherein, the main component of described host material is silicon-containing polymer, fluoro containing polymerses, the glass in macromolecule matrix
Glass state macromolecule；Described probe molecule material is pyrene class, the decacyclene Lei in multiring aromatic hydrocarbon organic compound He perylene class.
Beneficial effect：With conventional measuring method compared with device, the present invention has following characteristic and advantage：
(1) present invention realizes the same pacing to wall-jets velocity field and concentration field during gas atmosphere interaction
Amount, had both obtained the turbulent flow characteristic of wall-jets, also obtain the component transport property of special component in jet gas, helped
Can be that the selection of the optimization design and operating parameter of nozzle is carried in the convective motion and diffusion process that fully understand Gas Jet
For reference；
(2) conventional gas concentration measuring method, either arranges that side point extracts sample and carries out chemical analysis, or in stream
Portion sets laser or ultrasonic transmitter outside the venue, after comparing analysis, SVEL decay through the feedback signal wave spectrum of gas
Inverting obtains concentration value, spot measurement is all confined to, even the multi-point measurement system based on grid discretization is also difficult to accurately
Represent face domain concentration information, the present invention realizes the accurate of face domain oxygen concentration based on Fluorescence Quenching Principle combination image processing method
Measurement, solves the easy interference flowing field of conventional method sample probe, the problems such as measurement error is big；
(3) present invention realizes the pattern that takes turns to operate of high speed CCD camera and PIV cameras using isochronous controller, keeps away
Exempt from high intensity excitation light source and pulse laser sheet laser when Fast synchronization is measured to interfere, improve certainty of measurement；
(4) coal-powder boiler modelling device of the invention is presented concave shape structure, and left plate and right form edge have inwall
The groove of sealing mat has been inlayed in face, and this structure helps to change the quick coating wall of different oxygen at any time, can study surface shape
Influence of the shape characteristic to jet film forming characteristics.
Brief description of the drawings
Fig. 1 is the synchronous measuring apparatus schematic diagram of a kind of wall-jets velocity field of the invention and concentration field, wherein having：Oxygen
Gas A, nitrogen B, PIV trace particle C, carbon monoxide D, coal-powder boiler modelling device 1, left plate 2, right plate 3, transparent part for front sight 4, oxygen are quick
Coating wall 5, jet gas entrance 6, cyclone gas entrance 7, main flow gas entrance 8, gas vent 9, mixed room 10, mixing chamber 11, arteries and veins
Rush laser light sheet 12, high intensity excitation light source 13, PIV cameras 14, high speed CCD camera 15, isochronous controller 16, computer
17；
Fig. 2 is the coal-powder boiler modelling dress in the synchronous measuring apparatus of a kind of wall-jets velocity field of the invention and concentration field
Schematic diagram is put, wherein having：The quick coating wall 5 of left plate 2, right form 3, transparent part for front sight (poly (methyl methacrylate) plate) 4, oxygen, groove 18, sealing
Mat 19.
Specific embodiment
The present invention is described in detail referring to Fig. 1~2 to implement.The present embodiment carries out reality under premised on the technical program
Apply, give detailed implementation method and operating process, but protection scope of the present invention is not limited to following embodiments.
(1) synchronous measuring apparatus of wall-jets velocity field and concentration field are made.Use a block size for 500mm ×
Used as left plate 2, length side opens width 10mm to the rubber slab of 100mm × 15mm, the strip grooves (i.e. groove 18) of height 7mm,
In groove mat is sealed on three paste on wall.Opened up at left plate 2100mm height an efflux nozzle of diameter 20mm (as
Jet gas entrance 6) and an eddy flow spout of diameter 25mm (as cyclone gas entrance 7), between the two away from 60mm.Using one piece of chi
Very little is the high-purity transparent plexiglass plate of 500mm × 100mm × 15mm as right form 3, and length side opens width 10mm, height
The strip grooves (i.e. groove 18) of 7mm, mat is sealed on three paste on wall in groove.Use a block size for 500mm × 250mm ×
The high-purity transparent plexiglass plate of 10mm as transparent part for front sight 4, with left plate 2 and the side high intensity of the unslotted of right form 3
Glue bonding is into concave shape part.
Mix room 10 and mixing chamber 11 is placed in the outside of coal-powder boiler modelling device 1, the former and oxygen A, nitrogen B and PIV
Trace particle C is connected, and the latter connects with carbon monoxide D and nitrogen B.Mixed when oxygen A, nitrogen B and PIV trace particle C enter
Substantially uniformity mixing behind room 11, is then entered in coal-powder boiler modelling device by efflux nozzle again.When carbon monoxide and nitrogen enter
After entering mixing chamber 11, entered in coal-powder boiler modelling device by eddy flow spout.
Pulse laser sheet laser 12 is set up in above gas coal-powder boiler modelling device 1, is directed downward, can be along parallel or vertical
Moved freely in the quick direction of coating wall 5 of oxygen, each tangent plane in making sheet laser to illuminate flow field.Meanwhile, pulse laser piece
Light source 12 also can freely be rotated in fixing point, make the sheet laser launched parallel or perpendicular to the quick coating wall 5 of oxygen.By high intensity
Excitation light source 13 is positioned over the outside of coal-powder boiler modelling device 1 top, and camera lens is on the lower side, and light source inwardly passes through the transparent organic glass of high-purity
Glass plate illuminates the quick coating wall 5 of whole oxygen.High speed CCD camera 15 is arranged at the outside of coal-powder boiler modelling device 1, and camera lens are just
To the quick coating wall 5 of oxygen.PIV cameras 14 are arranged at the outside of coal-powder boiler modelling device 1, when the quick coating wall of sheet laser and oxygen is parallel
When, PIV cameras 14 are arranged in the right opposite of transparent part for front sight, and when the quick coating wall of sheet laser and oxygen is vertical, PIV cameras 14 are arranged in
The right opposite of right form.Pulse laser sheet laser 12, high intensity excitation light source 13, high speed CCD camera 15 and PIV cameras 14 are equal
It is connected with isochronous controller 16 and computer 17.
(2) the quick coating wall of oxygen is made.From several pieces of rectangle PVC boards as the quick coating wall of oxygen, the surface of one block of plate is
Plane, the surface of remaining several blocks of plate has well-regulated convex surface, and its shape has semicircle, equilateral triangle, rectangle, when convex surface is semicircle
During shape, its diameter R=2.5mm, when convex surface is equilateral triangle, its length of side L=2.8mm, when convex surface is rectangle, its bottom surface is long
X=2.6mm, H=1.3mm high, while the white paint in bottom spraying.The pyrene that can be selected in multiring aromatic hydrocarbon organic compound
Class, decacyclene Lei, perylenes class are probe molecule material (selecting BaP herein), silicon-containing polymer, fluorine-containing height in macromolecule matrix
Molecule, glassy polymer are host material (selecting polysiloxanes herein), and probe molecule material is pressed into 10 by physisorphtion
~35% proportional load on host material, then by nanomatrix material spraying in PVC board.
(3) calibration experiment.The quick coating wall of oxygen that will be made inserts the groove of left and right side plate, forms complete coal-powder boiler
Modelling device body, beneath entrance is main flow gas entrance 8, and top upper outlet is gas vent 9.By oxygen and nitrogen respectively by 5%,
10%th, the ratio of 20%, 30%, 40% (volume ratio) is mixing room mixing, then enters coal-powder boiler modelling by efflux nozzle
Device.Close the air inlet of eddy flow entrance and main flow inlet.High intensity excitation light source is opened, the color for observing the quick coating wall of oxygen becomes
Change, using high speed CCD camera captured in real-time image information, and data signal transmission to computer is carried out into image procossing.Root
According to Stern-Volmer formula, by graphical analysis, obtain in different oxygen concentrations oxygen, probe molecule species, load percentage bar
The color regular on the quick coating wall surface of oxygen under part, forms oxygen concentration and colourity comparison data storehouse.
(4) synchronous experiments of wall-jets velocity field and concentration field.The oxygen of known content, nitrogen and PIV are shown
Track particle is passed through and mix room mixing, wherein, oxygen volumetric concentration is 10%.Then gas-solid mixture is entered by efflux nozzle
Coal-powder boiler modelling device.Nitrogen and carbon monoxide are uniformly mixed in the ratio of volumetric concentration 70% in mixing chamber, is then distinguished
Coal-powder boiler modelling device is entered by eddy flow spout and main flow inlet.High intensity excitation light source is opened, the quick coating wall of oxygen is illuminated,
Observe the color change of the quick coating wall of oxygen.Pulse laser sheet laser is opened, lens direction is adjusted, makes section and the quick coating wall of oxygen
Face is parallel.High speed CCD camera and PIV cameras are opened, holding state is at.Controller is opened, adjusting parameter makes high-strength
Degree excitation light source and high speed CCD camera synchronous working, then make they be in holding state, unbalanced pulse laser light sheet and
PIV cameras simultaneously make them work asynchronously, and them is in holding state, open high intensity excitation light source and high-speed CCD is taken the photograph
Camera works asynchronously, and so both take turns to operate, and the tangent plane velocity field irradiated by sheet laser is caught respectively and is irradiated with excitation light source
Wall image.The photo real-time Transmission of shooting is obtained at the velocity field and wall of tangent plane to computer after image procossing
Oxygen concentration field.
Claims (8)
1. synchronous measuring apparatus of a kind of wall-jets velocity field and concentration field, it is characterised in that including coal-powder boiler modelling device,
The quick coating wall of oxygen, high speed CCD camera, PIV cameras, high intensity excitation light source, pulse laser sheet laser, mixed room, mixed gas
Room, isochronous controller and computer, wherein：
Described coal-powder boiler modelling device is sequentially connected by left plate, transparent part for front sight and right form and constitutes concave shape part, the oxygen
Quick coating wall collectively constitutes circumferential closed device body with the concave shape part, and described device body bottom portion is main gas
Body entrance, top is gas vent, and left plate is offered at the quick coating wall of nearly oxygen and also opened at efflux nozzle, and same absolute altitude
It is provided with eddy flow spout；
The pulse laser sheet laser is set up in above air stream outlet, is directed downward, and is freely rotatable, and makes sheet laser parallel or vertical
It is straight to be moved freely along parallel or perpendicular to the quick coating wall direction of oxygen in the quick coating wall of oxygen, the speed of flow field section is presented
Field information；
The high intensity excitation light source is positioned over coal-powder boiler modelling device outside, the right opposite of the quick coating wall of oxygen, and high intensity swashs
Encourage light source inwardly to be irradiated through transparent part for front sight, the quick coating wall of whole oxygen can be covered；
Described room of mixing is placed in coal-powder boiler modelling device outside, for uniform mixture of oxygen, nitrogen and PIV trace particles, mixes
Dual-Phrase Distribution of Gas olid after conjunction is entered in coal-powder boiler modelling device by efflux nozzle；
Described mixing chamber is placed in coal-powder boiler modelling device outside, for uniform mixing nitrogen and carbon monoxide, mixed gas
Stream is entered in coal-powder boiler modelling device by eddy flow spout and main flow inlet；
Described high speed CCD camera is arranged at coal-powder boiler modelling device outside, the right opposite of the quick coating wall of oxygen, camera lens
The alignment quick coating wall of oxygen, the photo of shooting is transmitted to computer disposal；
Described PIV cameras are arranged at coal-powder boiler modelling device outside, when the quick coating wall of sheet laser and oxygen is parallel, PIV phases
Machine is arranged in the right opposite of transparent part for front sight, and when the quick coating wall of sheet laser and oxygen is vertical, PIV cameras are arranged in the just right of right form
Face, the photo of shooting is transmitted to computer disposal；
Described isochronous controller encourages light source, high speed CCD camera, PIV cameras with pulse laser sheet laser, high intensity respectively
Be connected with computer, its effect is high speed CCD camera and PIV cameras is taken turns to operate, at the same make pulse laser sheet laser and
PIV cameras, high intensity excitation light source and high speed CCD camera work simultaneously；
Described computer is connected with high speed CCD camera, PIV cameras and controller, and CCD camera and PIV are come from for storing
The data of camera, and image procossing is carried out, obtain tangent plane velocity field and wall concentration field.
2. synchronous measuring apparatus of wall-jets velocity field according to claim 1 and concentration field, it is characterised in that described
Right form and left plate open up fluted in the plate edge of open side, and groove inner wall face is stained with sealing mat, the quick painting of oxygen
Layer wall collectively constitutes circumferential closed device body after inserting groove with concave shape part.
3. synchronous measuring apparatus of wall-jets velocity field according to claim 1 and concentration field, it is characterised in that described
Transparent part for front sight and right form are made up of high-purity transparent plexiglass plate, and left plate is made up of rubber slab.
4. synchronous measuring apparatus of wall-jets velocity field according to claim 1 and concentration field, it is characterised in that described
The quick coating wall of oxygen be made up of rectangle PVC board, a side surface is plane or well-regulated convex surface, and it is shaped as semicircle, just
Any one or a few in triangle or rectangle, convex side bottom spray-coated white paint, in uniform fold host material above, passes through
By a certain percentage be supported on host material probe molecule material by physisorphtion.
5. synchronous measuring apparatus of wall-jets velocity field according to claim 4 and concentration field, it is characterised in that when convex
When face is for semicircle, its diameter D=1/50~1/30W, when convex surface is equilateral triangle, its length of side L=1/50~1/30W, when
When convex surface is rectangle, its bottom surface X=1/50W~1/30 long, H=1/3~1/2X high, wherein, W is the width of the quick coating wall of oxygen
Degree.
6. synchronous measuring apparatus of wall-jets velocity field according to claim 4 and concentration field, it is characterised in that described
The main component of host material be silicon-containing polymer in macromolecule matrix, fluoro containing polymerses or glassy polymer；It is described
Probe molecule material be pyrene class, the decacyclene Lei Huo perylene classes in multiring aromatic hydrocarbon organic compound.
7. the method for synchronously measuring of a kind of wall-jets velocity field and concentration field, it is characterised in that comprise the following steps：
(1) a certain proportion of probe molecule material is loaded on host material, being sprayed at surface has the white of certain convex shape
On color wall, the quick coating wall of oxygen is prepared into；
(2) oxygen, nitrogen and PIV trace particles are uniformly mixed in proportion in mixed room, oxygen is flowed transversely through by efflux nozzle
Quick coating wall, while carbon monoxide and nitrogen are uniformly mixed in proportion in mixing chamber, by eddy flow spout and main flow inlet
Introduce in coal-powder boiler modelling device, interacted with wall-jets；
(3) using the high intensity excitation light source irradiation quick coating wall of oxygen, probe molecule is excited to send fluorescence, luminous intensity and surface
Oxygen concentration is inversely proportional, the luminous intensity inspired using high speed CCD camera record, according to Stern-Volmer formula, by figure
As analysis, the colour developing rule on the quick coating wall top layer of oxygen under the conditions of different oxygen concentrations, probe molecule species, load percentage are obtained
Rule；
(4) the coal-powder boiler modelling device using the quick coating wall of oxygen as jet film forming wall, overhead stream exit arrangement are built
Pulse laser sheet laser, high speed CCD camera and PIV cameras are set up in the front of the quick coating wall of oxygen, oblique to be arranged above
Excitation light source, isochronous controller trigger pulse laser light sheet and excitation light source every frame work, and with high speed CCD camera and
PIV cameras work asynchronously, and the wall image of the tangent plane velocity field and excitation light source irradiation irradiated by sheet laser are caught respectively, through figure
As obtaining the velocity field of tangent plane and the concentration field of wall after treatment.
8. method according to claim 7, it is characterised in that the main component of described host material is macromolecule matrix
In silicon-containing polymer, fluoro containing polymerses or glassy polymer；Described probe molecule material organises for multiring aromatic hydrocarbon
Pyrene class, decacyclene Lei Huo perylene classes in compound.
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