CN108444874A - A kind of simulation inside fire flue gas measures Visualization platform and assay method - Google Patents
A kind of simulation inside fire flue gas measures Visualization platform and assay method Download PDFInfo
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- CN108444874A CN108444874A CN201810291987.5A CN201810291987A CN108444874A CN 108444874 A CN108444874 A CN 108444874A CN 201810291987 A CN201810291987 A CN 201810291987A CN 108444874 A CN108444874 A CN 108444874A
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- grain
- flue gas
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- gas
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- 239000003546 flue gas Substances 0.000 title claims abstract description 58
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000004088 simulation Methods 0.000 title claims abstract description 22
- 238000012800 visualization Methods 0.000 title claims abstract description 14
- 238000003556 assay Methods 0.000 title claims abstract description 11
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 50
- 239000007789 gas Substances 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 28
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims description 24
- 230000000007 visual effect Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 239000004020 conductor Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 4
- 239000001294 propane Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000000827 velocimetry Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of simulation inside fire flue gases to measure Visualization platform and assay method, the experiment porch, including model room, burning things which may cause a fire disaster, light source, gas grain mixing arrangement, tracer grain feedway, air feeder and digital camera system, the burning things which may cause a fire disaster is arranged in simulating chamber, the fire's point of origin is provided with tracer grain liberation port, the gas grain mixing arrangement is connected to by particle diversion pipe with tracer grain liberation port, it is provided with flow regulator on the particle diversion pipe, the tracer grain feedway is connected to gas grain mixing arrangement respectively with air feeder.It is at low cost, safe and environment-friendly using the experiment porch and assay method of the application, improve the accuracy to flue gas layer thickness and flue gas flow field structure determination.
Description
Technical field
The present invention relates to Fire Science research fields, and in particular to a kind of simulation inside fire flue gas measurement Visualization
Platform and assay method.
Background technology
In Fire Science research, real scale experiment is a kind of most direct research method, however its of high cost, experiment condition
It is larger to be difficult to control, directly carry out test or study difficulty, therefore is in most cases replaced by reduced scale degree model test.Mould
Type experimental method is obtained according to the principle of similitude by being tested under the geometrical condition proportional with physical surroundings size
Experimental data under moulded dimension predicts corresponding parameter of the same name under full-scale conditions then according to certain transformational relation
Value restores the phenomenon under full-scale conditions with realizing.
Flow field structure etc. inside the thickness of flue gas layer, flue gas layer is the parameter paid close attention in fire test.However, should
The accurate difficult point for obtaining always fire test of class parameter, the reason is as follows that：First, the flue gas that fire burning generates causes to test
Visibility drastically declines in space so that is visually difficult to directly observe and record flue gas layer thickness with picture pick-up device.Some are learned
Person puts forward to judge the thickness of flue gas layer, but the longitudinal direction of temperature and smoke particle point indirectly with the method based on temperature gradients
There are larger differences for cloth.Therefore, the visual method of research and development fire smoke layer is very necessary；It secondly, can to the progress of fire smoke layer
Depending on changing the necessary condition only measured to its flow field structure.PIV (Particle Image are usually used in hydrodynamic calculations
Velocimetry) method stream field measures.PIV methods need the tracer grain that grain size is suitable, followability is good, photonasty is good
Son, the selection of trace particle and the physical parameter of fluid are closely related.It is worth noting that, the PIV in the fluid experiment of forefathers
It measures and is often directed to liquid, and fire smoke is hot gas, physical parameter has very big difference with liquid, the tracer used in forefathers
Particle is simply not proposed to fire smoke.Fire burning generate smoke particle mostly in the form of aerosol disperse in flue gas layer it
In, the grain size of such smoke particle is bad into small and photonasty, is visually difficult to common picture pick-up device to the single of this kind of grain size
Smoke particle is differentiated.Therefore, suitable trace particle need to be in addition added, PIV measurements could be carried out to fire smoke flow field；And
And in fire test, concern is more flue gas layer thickness and structure under quasi-steady state, the plane paid close attention to for PIV
The focal point of (two-dimensional/three-dimensional) flow field velocity is not consistent, and PIV experiment has equipment costliness, requirement of experiment higher, tracer
The difficult feature of particle selection.
Invention content
In view of this, the purpose of the present invention is to provide a kind of simulation inside fire flue gas measure Visualization platform and
Assay method, to realize the accurate measurement to flue gas layer thickness and flue gas flow field structure.
The present invention is solved the above problems by following technological means：A kind of simulation inside fire flue gas measurement Visualization
Platform, including model room, burning things which may cause a fire disaster, light source, gas grain mixing arrangement, tracer grain feedway, air feeder and number
Camera system, the burning things which may cause a fire disaster are arranged in simulating chamber, and the fire's point of origin is provided with tracer grain liberation port, the gas grain mixing
Device is connected to by particle diversion pipe with tracer grain liberation port, is provided with flow regulator on the particle diversion pipe, institute
Tracer grain feedway is stated to be connected to gas grain mixing arrangement respectively with air feeder.
Further, the air feeder includes gas-drying apparatus and air compressor.
Further, the digital camera system includes image processing unit and is arranged in the indoor Image Acquisition list of model
Member.
Further, using propane gas burner simulation fire source.
Further, the light source is semiconductor laser sheet laser.
Further, the output power of the semiconductor laser sheet laser be 0.8-1.2W, line width 0.8-1.2mm.
Further, the model room is made of transparent toughened glass.
The invention also discloses a kind of simulation inside fire flue gas assay methods, and flue gas is carried out using above-mentioned test platform
Measurement, include the following steps：
1) the indoor air of burning things which may cause a fire disaster heating model is used, air is made to flow；
2) it is proportionally added into and is shown to gas grain mixing arrangement respectively by tracer grain feedway and air feeder
Track particle and air make tracer grain be uniformly mixed with air by gas grain mixing arrangement, by tracer grain liberation port to mould
Fire smoke tracer grain is injected in type room, and the indoor flow of tracer grain injection model and stream are adjusted by flow regulator
Speed；
3) the piece optical plane on vertical direction is formed in model room by light source, keeps the flue gas layer thickness in the plane logical
It crosses grain light-reflection and reaches visual, observe flue gas tracer grain；
4) picture of digital camera system shooting smoke modelling distribution of particles and the video image of moving situation are used；
5) picture and video image are handled by software, analysis obtains flue gas layer thickness and flue gas flow field structure.
Further, by adjusting tracer grain and compressed gas mixed proportion and light source watt level, keep piece light flat
Flue gas layer thickness in face reaches visual by grain light-reflection.
Beneficial effects of the present invention：
1) test platform of the invention, it is simple in structure, it is significantly dropped relative to traditional PI V methods in terms of experimental cost
It is low.
2) in terms of accuracy, by adjusting the watt level of the mixed proportion and light source of tracer grain and compressed gas,
So that flue gas layer thickness is passed through grain light-reflection and reach visual, smoke modelling distribution of particles can directly be shot using digital camera system
Picture and moving situation video image, relative to it is traditional using temperature field replace flue gas field distribution method for, greatly
The big accuracy improved to flue gas layer thickness and flue gas flow field structure determination.
3) in safety and environmental-friendly aspect, using propane gas burner simulation fire source, fire source power is controllable, burning
Fully completely, product cleaning：It is environmentally safe using boron nitride as tracer grain, to no damage to human body, to experimental facilities
It is corrosion-free.
4) use the trace particle of 1 μm of nitridation canopy particle as flow of flue gas, it is at low cost and to fire smoke with
It is casual good：Trace particle is uniform from gas grain mixing arrangement with the air-flow of air compressor, steadily enters the indoor cigarette of model
Gas-bearing formation avoids the randomness being manually added, and stream field interference is small.
5) it is based on the above advantage, the fire smoke flow field tracer method that this experiment uses can be widely applied to small size
In full-scale fire test, the laboratory research for carrying out fire has prodigious application value.By using this fire
Calamity smoke flow field tracer method is tested, and the key parameters such as thickness, form and the flow field structure of fire smoke layer can be obtained,
To instructing Fire Smoke Control to be of great significance.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
Below with reference to attached drawing, the present invention is described in detail, as shown in Figure 1：The present invention provides in a kind of simulating chamber
Fire smoke measures Visualization platform, including model room 1, burning things which may cause a fire disaster 2, light source 3, gas grain mixing arrangement 4, tracer grain supply
Device 5, air feeder 6 and digital camera system 7, the model room are made of transparent toughened glass, to observe note
The case where recording model Indoor Flow Field；The burning things which may cause a fire disaster is arranged in simulating chamber, and using propane gas burner simulation fire source, power is
4.2KW, power is controllable, and burning is fully complete, and product cleaning, fire's point of origin is provided with tracer grain liberation port 8；The light source is
Semiconductor laser sheet laser, the output power of light source is 0.8-1.2W, line width 0.8-1.2mm, preferably output power 1W, line
Wide 1mm；The gas grain mixing arrangement is connected to by particle diversion pipe 9 with tracer grain liberation port, is set on the particle diversion pipe
It is equipped with flow regulator 10, the tracer grain feedway is connected to gas grain mixing arrangement respectively with air feeder,
Tracer grain feedway is uniform into gas grain mixing arrangement, steadily inputs tracer grain, is made using 1 μm of nitridation canopy particle
It is at low cost and good to the followability of fire smoke for the tracer grain of flow of flue gas, meanwhile, it is environmentally safe, to human body
Fanout free region, it is corrosion-free to experimental facilities；The air feeder includes gas-drying apparatus and air compressor, air compressor
The air-flow of generation flows into gas grain mixing arrangement after gas-drying apparatus is dried, and tracer grain is with the air-flow of air compressor from gas grain
In mixing arrangement uniformly, steadily enter the indoor flue gas layer of model, avoid the randomness being manually added, and stream field interferes
It is small；During the test, by adjusting tracer grain and compressed gas mixed proportion and light source watt level, make flue gas layer
Thickness reaches visual by grain light-reflection, using digital camera system can directly shoot smoke modelling distribution of particles picture and
The video image of moving situation is substantially increased for traditional method for being replaced flue gas field distribution using temperature field
To the accuracy of flue gas layer thickness and flue gas flow field structure determination；The digital camera system include image processing unit and
Setting carries out storage and preliminary treatment, Image Acquisition list in the indoor image acquisition units of model, image processing unit to image
Member is for acquiring image.
Disclosed herein as well is a kind of simulation inside fire flue gas assay methods, sample above-mentioned test platform and carry out flue gas
Measurement, include the following steps：
1) the indoor air of burning things which may cause a fire disaster heating model is used, air is made to flow；
2) it is proportionally added into and is shown to gas grain mixing arrangement respectively by tracer grain feedway and air feeder
Track particle and air make tracer grain be uniformly mixed with air by gas grain mixing arrangement, by tracer grain liberation port to mould
Fire smoke tracer grain is injected in type room, and the indoor flow of tracer grain injection model and stream are adjusted by flow regulator
Speed；
3) the piece optical plane on vertical direction is formed in model room by light source, keeps the flue gas layer thickness in the plane logical
It crosses grain light-reflection and reaches visual, observe flue gas tracer grain；Specifically, by adjusting the mixing of tracer grain and compressed gas
The watt level of ratio and light source makes the flue gas layer thickness in piece optical plane pass through grain light-reflection and reaches visual；
4) picture of digital camera system shooting smoke modelling distribution of particles and the video image of moving situation are used；
5) picture and video image are handled by software, analysis obtains flue gas layer thickness and flue gas flow field structure.
Some column processing such as the gray processing to result picture, binaryzation, denoising are specifically included, this is the prior art, is not described in detail；It is soft
Part uses matlab.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.
Claims (10)
1. a kind of simulation inside fire flue gas measures Visualization platform, it is characterised in that：Including model room, burning things which may cause a fire disaster, light source,
Gas grain mixing arrangement, tracer grain feedway, air feeder and digital camera system, the burning things which may cause a fire disaster setting are being simulated
Interior, the fire's point of origin are provided with tracer grain liberation port, and the gas grain mixing arrangement passes through particle diversion pipe and tracer
Grain liberation port is connected to, and flow regulator is provided on the particle diversion pipe, and the tracer grain feedway is supplied with air
It is connected to respectively with gas grain mixing arrangement to device.
2. simulation inside fire flue gas according to claim 1 measures visualized experiment platform, it is characterised in that：The sky
Air feed system includes gas-drying apparatus and air compressor.
3. simulation inside fire flue gas according to claim 2 measures Visualization platform, it is characterised in that：The number
Word camera system includes image processing unit and is arranged in the indoor image acquisition units of model.
4. simulation inside fire flue gas according to claim 1 measures Visualization platform, it is characterised in that：Using third
Alkane gas burner simulation fire source.
5. simulation inside fire flue gas according to claim 1 measures Visualization platform, it is characterised in that：The light
Source is semiconductor laser sheet laser.
6. simulation inside fire flue gas according to claim 5 measures Visualization platform, it is characterised in that：Described half
The output power of conductor Laser sheet laser is 0.8-1.2W, line width 0.8-1.2mm.
7. simulation inside fire flue gas according to claim 1 measures Visualization platform, it is characterised in that：The mould
Type room is made of transparent toughened glass.
8. a kind of simulation inside fire flue gas assay method, it is characterised in that：Using as described in claim 1-7 any one
It simulates inside fire flue gas and measures Visualization platform.
9. simulation inside fire flue gas assay method according to claim 8, which is characterized in that include the following steps：
1) the indoor air of burning things which may cause a fire disaster heating model is used, air is made to flow；
2) tracer is proportionally added into gas grain mixing arrangement by tracer grain feedway and air feeder respectively
Grain and air, make tracer grain be uniformly mixed with air by gas grain mixing arrangement, by tracer grain liberation port to model room
Interior injection fire smoke tracer grain adjusts the indoor flow and flow rate of tracer grain injection model by flow regulator；
3) the piece optical plane on vertical direction is formed in model room by light source, the flue gas layer thickness in the plane is made to pass through
Grain is reflective to reach visual, observes flue gas tracer grain；
4) picture of digital camera system shooting smoke modelling distribution of particles and the video image of moving situation are used；
5) picture and video image are handled by software, analysis obtains flue gas layer thickness and flue gas flow field structure.
10. simulation inside fire flue gas assay method according to claim 9, it is characterised in that：By adjusting tracer
Grain and the mixed proportion of compressed gas and the watt level of light source, make the flue gas layer thickness in piece optical plane pass through grain light-reflection and reach
To visual.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810291987.5A CN108444874A (en) | 2018-03-30 | 2018-03-30 | A kind of simulation inside fire flue gas measures Visualization platform and assay method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810291987.5A CN108444874A (en) | 2018-03-30 | 2018-03-30 | A kind of simulation inside fire flue gas measures Visualization platform and assay method |
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| Publication Number | Publication Date |
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| CN108444874A true CN108444874A (en) | 2018-08-24 |
Family
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051084A1 (en) * | 2018-09-04 | 2020-03-12 | Lam Research Corporation | Software emulator for hardware components in a gas delivery system of substrate processing system |
| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN112415007A (en) * | 2020-11-13 | 2021-02-26 | 上海交通大学 | NO for representing thermal typexImaging monitoring method and device for generated path |
| CN112581848A (en) * | 2020-12-11 | 2021-03-30 | 中国建筑科学研究院有限公司 | Tunnel fire smoke motion measurement simulation test system |
| CN112863286A (en) * | 2021-01-21 | 2021-05-28 | 公安部物证鉴定中心 | Full-size residential fire experiment system and method for case investigation |
| CN114414201A (en) * | 2021-12-31 | 2022-04-29 | 浙江大学 | Visual device of celadon kiln internal flow field simulation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020051084A1 (en) * | 2018-09-04 | 2020-03-12 | Lam Research Corporation | Software emulator for hardware components in a gas delivery system of substrate processing system |
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| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN111624140B (en) * | 2020-05-18 | 2021-08-17 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
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| CN112415007B (en) * | 2020-11-13 | 2021-09-21 | 上海交通大学 | NO for representing thermal typexImaging monitoring method and device for generated path |
| CN112581848A (en) * | 2020-12-11 | 2021-03-30 | 中国建筑科学研究院有限公司 | Tunnel fire smoke motion measurement simulation test system |
| CN112863286A (en) * | 2021-01-21 | 2021-05-28 | 公安部物证鉴定中心 | Full-size residential fire experiment system and method for case investigation |
| CN114414201A (en) * | 2021-12-31 | 2022-04-29 | 浙江大学 | Visual device of celadon kiln internal flow field simulation |
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