CN105067026B - For studying extraneous wind speed to flame propagation and the device and method of stability influence - Google Patents
For studying extraneous wind speed to flame propagation and the device and method of stability influence Download PDFInfo
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- CN105067026B CN105067026B CN201510553241.3A CN201510553241A CN105067026B CN 105067026 B CN105067026 B CN 105067026B CN 201510553241 A CN201510553241 A CN 201510553241A CN 105067026 B CN105067026 B CN 105067026B
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Abstract
The present invention is disclosed for studying extraneous wind speed to flame propagation and the device and method of stability influence.The device includes blower fan, air quantity regulation panel, wind speed and is uniformly distributed panel, experiment tunnel, measuring wind speed window, flue gas measurement window, air-introduced machine, support, Bunsen burner, height regulating platform, rubber tube, flowmeter, valve, gas bomb, test the air-supply of tunnel one end, one end air inducing, it can study under uniform extraneous wind speed, fixed burning things which may cause a fire disaster flame transmission characteristic and its stability.The manufacturing cost of apparatus of the present invention is low, simple in construction, easy to operate, control is flexible, and experimental phenomena is easy to observe and measured, and the data obtained is true and reliable, it is that the flame structure under research relative motion, combustion characteristic, and analysis flame transmission feature and stability provide experiment basis.
Description
Technical field
The present invention relates to extraneous wind speed to flame propagation and the experimental technique field of stability influence, and in particular to for grinding
Extraneous wind speed is studied carefully to flame propagation and the device of stability influence.
Background technology
Flame transmission feature and its combustion stability are one of study hotspot of domestic and international many scholars all the time.It is logical
The flame combustion characteristic of research controlled burning is crossed, the development condition and its combustion propagation process of burning things which may cause a fire disaster diffusion combustion is may recognize that,
So as to further derive the formation and development rule of the processes such as the fire under runaway combustion state, this can be to efficiently reduce fire
Calamity provides necessary theoretical foundation and experiment basis to the harm that human society is caused.
When geo-stationary burning things which may cause a fire disaster burns, flame undergoes the process by laminar combustion to turbulent combustion.It is fiery in this course
The propagation on the preceding sharp side of flame is irregular.Numerous scholars carried out research and inquirement to this process, and it is special to have stated out this propagation
Levy.At present, for geo-stationary burning things which may cause a fire disaster combustion flame the existing part achievement of propagation characteristic and the theoretical research of stability, Li Yu
It is red etc.（Detailed numerical value simulation [J] engineering thermophysicses of Li Yuhong, Qi Haiying, Zhang Hongwu methane premixed combustion flames
Report, 2002,23 (1):119-122.）Numerical simulation was carried out to the premixed combustion flame of methane, obtained in combustion process
The concentration distribution of ten kinds of primitive components including CO and NO.Ellis C de C O（Ellis C de C O. Flame
movement in gaseous explosive mixtures[J]. Journal of Fuel Science, 1928, 7:
502 - 508.）CO and O is carried out2Premixed combustion experiment in a length of 19. 5 cm, the cm of internal diameter 5 closed conduct,
And combustion flame is shot in experimentation, the abnormal propagation of Flame front is observed, has been drawn in fire
In flame communication process, Flame front forms the conclusion of cusp from being changed into front curve backward.M. Matalon etc.
（MatalonM, Metzener P. The propagation of premixed flames in closed tubes[J].
Journal of Fluid Mechanics,1997,336:331-350.）Premixed gas fire has been carried out in one section of closed conduct
The experimental study that flame is propagated, test result indicates that during flame propagation, Flame front can form many vortexs, and these
Vortex can cause the vortex of burnt gas, ultimately form Tulip flame structures.Liu Yuying etc.（Liu Yuying, MOST Jean-
Flame holding [J] the combustion sciences and technology of Miche, BAUER Philippe, Yang Mao woods dilute combustions, 2009,
15(2):103-108.）By the research of the methane air flame diluted to nitrogen, reactant preheating temperature and dilution are discussed
Influence of two factors of rate to flame holding, test result indicates that influence of the reactant preheating temperature to flame holding is more
Significantly, it is to influence the principal element of flame holding.
However, these researchs are limited to the flame of small-scale experiment in numerical simulation or hermetic and half-hermetic spaces mostly
Burning, without the influence in view of extraneous wind speed to flame transmission feature and stability.Under actual operating mode, flame combustion
Burning occurs under wide-open system mostly.Therefore, extraneous wind speed is carried out to flame transmission feature and stability shadow
Loud research has more realistic meaning.
The content of the invention
To make up the deficiency in above-mentioned background technology, the present invention provide it is a kind of be used to studying extraneous wind speed to flame propagation and
The apparatus and method of stability influence, to help researcher to simulate flame combustion actual condition, are fully realized in extraneous wind speed
Under the influence of, flame is developed into the condition and its process of turbulent combustion by laminar combustion, is researched and analysed in different combustion powers, no
Flame propagation and stability features under the conditions of same air quantity, different extraneous wind speed, and burning primary product content distribution feature,
So as to efficiently control combustion process.
The purpose of the present invention is realized at least through one of following technical scheme.
It is a kind of to be used to study extraneous wind speed to flame propagation and the device of stability influence, including blower fan, air quantity regulation face
Plate, wind speed are uniformly distributed panel, experiment tunnel, measuring wind speed window, flue gas measurement window, air-introduced machine, support, Bunsen burner, height
Spend regulating platform, rubber tube, flowmeter, valve, gas bomb.Wherein, experiment tunnel is supported by support, at experiment tunnel portal
Blower fan, air quantity regulation panel, wind speed are respectively mounted successively is uniformly distributed panel, experiment tunnel exit pipeline and air-introduced machine phase
Even.Away from the circular flame confession Bunsen burner that an a diameter of 10cm is provided with port 1/3 on experiment tunnel bottom center line
Flame is put in experiment tunnel, and Bunsen burner is placed on height regulating platform, the gas access connection rubber tube of Bunsen burner, in rubber
The end of pipe is connected by flowmeter with the outlet valve of gas bomb, passes through valve adjustable gas flow.
Further, described experiment tunnel is that the centre being made up of transparent grp is cuboid-type, and two ends are in loudspeaker
The tunnel of shape.A diameter of 10cm circle is had on forward and backward face and top center line at 3/4 away from experiment tunnel port
Shape measuring wind speed window, real-time wind speed is measured for anemobiagraph.The forward and backward two sides at 4/5 away from experiment tunnel port has 5
The length of side of individual equidistant arrangement is 5cm square flue gas measurement window, is stretched into for the probe of flue gas analyzer, and measurement burning is main
The content of product.
Further, described air quantity regulation panel is a component, including handle, movable regulating plate, movable regulating plate
Centre bore, fan-shaped air inlet, secured adjusted plate, fan-shaped air outlet and secured adjusted plate centre bore, wherein, movable regulating plate is with consolidating
Determine adjustable plate to combine by way of movable regulating plate centre bore and secured adjusted plate centre bore are installed on the same axis,
And be mutually close to.Secured adjusted plate is fixed at experiment tunnel portal end flanges with bolt succession, is adjusted by rotation activity
Save the handle on plate, the sector wind mouthful overlapping area between regulation secured adjusted plate and movable regulating plate so that control air inlet with
The relative opening degree of air outlet, and then control the size of air quantity.
Further, it is on one piece of dividing plate, to offer the row circular vent of 3 row 5 that described wind speed, which is uniformly distributed panel,
To ensure that the wind speed profile for entering experiment tunnel is uniform, the cross sectional shape of its dividing plate is square.
Further, described Bunsen burner is a component, and it includes lamp bracket, lamp cylinder, air adjustment ring, gas access.
Further, the basic operation process of described device is：Rubber tube is connected on the gas access of Bunsen burner, first
Air adjustment ring is switched to full-shut position；The valve of crack gas bomb makes combustible gas flow into Bunsen burner, while rotary air is adjusted
Section ring allows a small amount of fresh air to enter Bunsen burner, and Bunsen burner is lighted in then burning, and according to requirement of experiment, control valve and air
Regulation ring makes flame height reach setting height；The Bunsen burner being burning is placed on height regulating platform, and makes flame through circle
Flame hole enters in experiment tunnel straight length, adjusts the height of height regulating platform, makes the flame bottommost and experiment tunnel of Bunsen burner
The bottom surface in road is on a horizontal plane.Blower fan is opened, handle is rotated, the wind speed in experiment tunnel straight length is reached experiment setting
Value, or air-introduced machine is opened, handle is rotated, the wind speed in experiment tunnel straight length is reached setting value；Start whole measuring instrumentss,
The profile of flame is recorded with digital camera, test the temperature of flue gas, O in tunnel with thermometer and flue gas analyzer record2、CO、
CO2、NO、NOxDeng concentration, with anemobiagraph record flue gas flow velocity, the flow with cmf record combustion gas；Pass through control valve
Coordinate with air adjustment ring and with rotating handle, to realize the experiment work under different combustion powers, flame height, extraneous wind speed
Condition.After experiment is finished, first air adjustment ring is shut, then turns off the valve of gas bomb, rubber tube is extracted.
Wherein, described blower fan is in the way of flange is connected on experiment tunnel portal end pipe road, and air-introduced machine is with flange
The mode of connection can choose whether dismounting on demand on experiment tunnel exit end pipe road during experiment.
Wherein, described rubber tube is connected between gas access and gas bomb in the way of kink is connected.
Wherein, described wind speed is uniformly distributed the centre section that panel is welded on the experiment horn-like tapered pipeline in tunnel portal end
At face, the regulation to air quantity is completed jointly with air quantity regulation panel, and wind is flowed into an uniform way in experiment tunnel straight length.
During experiment, air-introduced machine need to be pulled down using during blower fan, and using that need to pull down blower fan during air-introduced machine, blower fan is provided
Wind speed profile section be parabolically shape, the wind speed profile that air-introduced machine is provided is uniform, therefore can study two kinds not
Influence of the congener wind speed to flame propagation and stability.
During experiment, the flame size and height of Bunsen burner can be adjusted on demand, and the ratio of combustion gas and air can pass through regulation
The aperture of the valve of gas bomb, or the aperture of air adjustment ring are controlled.Multiple interfaces or survey are provided with experimental provision
Window is measured, each physical quantity such as the air mass flow under the conditions of various experimental studies, wind speed and smoke components is entered for corresponding instrument
Row measurement.
It is of the invention compared with existing experimental provision, its beneficial remarkable result is as follows：
1st, experimental provision research cost of the present invention is low, simple in construction, easy to operate, and control is flexible, and experimental phenomena is easy to see
Examine, carry out research the data obtained true and reliable.
2nd, compared with traditional fire test device, this experimental provision, which can carry out extraneous wind speed and burning things which may cause a fire disaster point, has certain phase
To under velocity conditions, flame propagation feature and its stability experiment to study flame structure and combustion characteristic, and analyze flame
Propagation characteristic and stability provide experiment basis.
Brief description of the drawings
Fig. 1 is used to study extraneous wind speed to flame propagation and the apparatus structure front view of stability influence for the present invention.
Fig. 2 is used to study extraneous wind speed to flame propagation and the apparatus structure top view of stability influence for the present invention.
Fig. 3 is the structural representation of Bunsen burner.
Fig. 4 is the structure chart that wind speed is uniformly distributed panel.
Fig. 5 a, Fig. 5 b are the structure chart that air quantity adjusts panel.
In figure：1- blower fans；2- air quantity adjusts panel；3- wind speed is uniformly distributed panel；4- tests tunnel；
5- measuring wind speed windows；6- flue gas measurement windows；7- air-introduced machines；8- supports；9- Bunsen burners；10- height regulating platforms；
11- rubber tubes；12- flowmeters；13- valves；14- gas bombs；15- circular flames mouthful；16- lamp brackets；17- lamps cylinder；18- air
Regulation ring；19- gas accesses；20- circular vents；21- dividing plates；22- handles；23- movable regulating plates；24- movable regulating plates
Centre bore；25- sector air inlets；26- secured adjusted plates；27- sector air outlets；28- secured adjusted plate centre bores.
Embodiment
The invention is further described with reference to the accompanying drawings and examples：
Refer to shown in the structure flow chart front view and top view of Fig. 1 and Fig. 2 apparatus of the present invention, one kind is used to study outer
Boundary's wind speed is uniform to flame propagation and the apparatus structure front view of stability influence, including blower fan 1, air quantity regulation panel 2, wind speed
Panel 3, experiment tunnel 4, measuring wind speed window 5, flue gas measurement window 6, air-introduced machine 7, support 8, Bunsen burner 9, height is distributed to adjust
Save platform 10, rubber tube 11, flowmeter 12, valve 13, gas bomb 14, circular flame mouth 15.Wherein, experiment tunnel 4 is by support 8
Supported, the experiment porch of tunnel 4 is respectively mounted blower fan 1, air quantity regulation panel 2, wind speed and is uniformly distributed panel 3 successively, real
Test on the outlet conduit of tunnel 4 and be filled with air-introduced machine 7.Wherein, the secured adjusted plate 26 in the air quantity regulation component of panel 2 is connected with bolt
Mode is fixed on the experiment arrival end flange of tunnel 4, and wind speed is uniformly distributed panel 3 and is welded on the experiment entrance of tunnel 4, blower fan 1
With air-introduced machine 7 so that in access device in the form of flange is connected, rubber tube 11 is connected on Bunsen burner 9 by kink.In experiment
The circular flame mouthful 15 that an a diameter of 10cm is provided with the bottom centre's line-spacing entrance 1/3 of tunnel 4 is put in for the flame of Bunsen burner 9
Test in tunnel 4, Bunsen burner 9 is placed on height regulating platform 10, the connection rubber tube 11 of gas access 19 of Bunsen burner 9, in rubber
The end of pipe 11 is equipped with flowmeter 12, and is connected with the valve 13 of gas bomb 14, and fuel gas stream is can adjust by valve 13
Amount.A diameter of 10cm circular wind is had on forward and backward face and top center line at the arrival end 3/4 in experiment tunnel 4
Fast measurement window 5 measures real-time wind speed for anemobiagraph, tests the forward and backward two sides at the 4/5 of the arrival end of tunnel 4 and has 5
The length of side of equidistant arrangement is 5cm square flue gas measurement window 6, is stretched into for the probe of flue gas analyzer, and measurement burning is main
The content of product.In experiment, wind speed can be measured using model XMXR3-AZ8912 anemobiagraph, model IMR can be used
2000 Marine flue gas analyzer measurement O2And burning primary product CO, CO2、NO、NOxDeng content.
Described air quantity regulation panel 2 is a component, including handle 22, movable regulating plate 23, movable regulating plate center
Hole 24, fan-shaped air inlet 25, secured adjusted plate 26, fan-shaped air outlet 27 and secured adjusted plate centre bore 28, wherein, activity adjustment
Plate 23 is installed on the same axis with secured adjusted plate 26 by movable regulating plate centre bore 24 and secured adjusted plate centre bore 28
Mode is combined, and is mutually close to.
Basic process of the present invention in experiment test is as follows：When being tested using blower fan 1, air-introduced machine 7 is unloaded, by rubber tube
11 are connected on the gas access 19 of Bunsen burner 9, and air adjustment ring 18 is first switched to full-shut position；The valve of crack gas bomb 14
Door 13 makes combustible gas flow into Bunsen burner 9, by the display reading of flowmeter 12, while rotary air regulation ring 18 allows a small amount of fresh
Air enters Bunsen burner 9, and Bunsen burner 9 is lighted in then burning, and according to requirement of experiment, controls the valve 13 of gas bomb 14 to open
Degree, adjustment gas flow numerical value needed for, and air adjustment ring 18 makes flame height reach setting height；This life that will be burning
Lamp 9 is placed on height regulating platform 10, and flame is entered through circular flame mouthful 15 in the experiment straight length of tunnel 4, and regulation height is adjusted
The height of platform 10 is saved, makes the flame bottommost of Bunsen burner 9 with testing the bottom surface in tunnel 4 on a horizontal plane.Blower fan 1 is opened,
Handle 22 is rotated, regulating air volume measures real-time wind speed using anemobiagraph, reaches the wind speed in the straight length of experiment tunnel 4
Test setting value；After waiting burning and steady air current after a while, start whole measuring instrumentss, using High-speed Schlieren Technique or
The profile of flame is recorded with digital camera, test the temperature of flue gas, O in tunnel 4 with thermometer and flue gas analyzer record2、CO、
CO2、NO、NOxDeng concentration, with anemobiagraph record flue gas flow velocity, with flowmeter 12 record combustion gas flow；Pass through regulating valve
Door 13 and air adjustment ring 18 simultaneously coordinate with rotating handle 22, to realize under different combustion powers, flame height, extraneous wind speed
Experiment condition, so as to obtain under each operating mode extraneous wind speed to flame propagation and stability influence experimental correlation data.Testing
Bi Hou, first shuts air adjustment ring 18, then turns off the valve 13 of gas bomb 14, extracts rubber tube 11.
When being tested using air-introduced machine 7, blower fan 1 is unloaded, above-mentioned same operation is carried out.
Claims (1)
1. for studying extraneous wind speed to flame propagation and the device of stability influence, it is characterised in that including blower fan (1), air quantity
Regulation panel (2), wind speed be uniformly distributed panel (3), experiment tunnel (4), measuring wind speed window (5), flue gas measurement window (6),
Air-introduced machine (7), support (8), Bunsen burner (9), height regulating platform (10), rubber tube (11), flowmeter (12), valve (13) are gentle
Body steel cylinder (14), wherein, experiment tunnel (4) is supported by support (8), and experiment tunnel (4) porch is respectively mounted wind successively
Machine (1), air quantity regulation panel (2), wind speed are uniformly distributed panel (3), and experiment tunnel (4) outlet conduit is connected with air-introduced machine (7)；
On experiment tunnel (4) bottom centerline this life is supplied away from the circular flame mouthful (15) that an a diameter of 10cm is provided with port 1/3
The flame of lamp (9) is put in experiment tunnel (4), and Bunsen burner (9) is placed on height regulating platform (10), and the gas of Bunsen burner (9) enters
Mouth (19) connection rubber tube (11), the outlet valve of flowmeter (12) and gas bomb (14) is passed through in the end of rubber tube (11)
(13) it is connected, passes through valve (13) adjustable gas flow；Experiment tunnel (4) is that the centre being made up of transparent grp is rectangular
Build, two ends are in horn-like tunnel；On forward and backward face and top center line at 3/4 away from experiment tunnel (4) port respectively
A diameter of 10cm circular measuring wind speed window (5) is provided with, the forward and backward two sides at 4/5 away from experiment tunnel (4) port is opened respectively
The square flue gas measurement window (6) that the length of side for having 5 equidistant arrangements is 5cm；Air quantity regulation panel (2) is a component, bag
Include handle (22), movable regulating plate (23), movable regulating plate centre bore (24), fan-shaped air inlet (25), secured adjusted plate (26),
Fan-shaped air outlet (27) and secured adjusted plate centre bore (28), wherein, movable regulating plate (23) passes through with secured adjusted plate (26)
The mode that movable regulating plate centre bore (24) and secured adjusted plate centre bore (28) are installed on the same axis is combined, and phase
Mutually it is close to；Secured adjusted plate (26) is fixed on experiment tunnel (4) arrival end flange with bolt succession, passes through rotation activity
Handle (22) on adjustable plate (23), the relative position between regulation secured adjusted plate (26) and movable regulating plate (23), so as to control
The relative opening degree of air inlet and air outlet processed, reaches the purpose of control air force；Blower fan (1) is mounted in the way of flange is connected
Test on tunnel (4) arrival end pipeline, dismounting can be chosen whether during experiment on demand；Air-introduced machine (7) is in the way of flange is connected
On experiment tunnel (4) port of export pipeline, dismounting can be chosen whether during experiment on demand；During using blower fan (1), by air-introduced machine
(7) disassemble；During using air-introduced machine (7), blower fan (1) is disassembled；Wind speed be uniformly distributed panel (3) be one piece every
On plate (21), the row circular vent (20) of 3 row 5 is offered, the cross sectional shape of dividing plate (21) is square；Bunsen burner (9) is one
Individual component, it includes lamp bracket (16), lamp cylinder (17), air adjustment ring (18), gas access (19)；Wind speed is uniformly distributed panel
(3) it is common complete with air quantity regulation panel (2) at the intermediate cross-section for being welded on the experiment horn-like tapered pipeline of tunnel (4) arrival end
The regulation of paired air quantity, and wind is flowed into an uniform way in experiment tunnel (4) straight length；A variety of connect is provided with experimental provision
Mouth or measurement window, for corresponding instrument to the air mass flow under the conditions of various experimental studies, wind speed and smoke components physical quantity
Measure；Rubber tube (11) is connected on the gas access of Bunsen burner (9) (19), first air adjustment ring (18) switched to entirely
Closed state；The valve (13) of crack gas bomb (14) makes combustible gas flow into Bunsen burner (9), while rotary air regulation ring (18)
A small amount of fresh air is allowed to enter Bunsen burner (9), Bunsen burner (9) is lighted in then burning, and according to requirement of experiment, control valve (13)
Flame height is set to reach setting height with air adjustment ring (18)；The Bunsen burner being burning (9) is placed on height regulating platform (10)
On, and flame is entered through circular flame mouthful (15) in experiment tunnel (4) straight length, the height of regulation height regulating platform (10),
Make the flame bottommost of Bunsen burner (9) with testing the bottom surface of tunnel (4) on a horizontal plane；Blower fan (1) is opened, handle is rotated
(22) wind speed in experiment tunnel (4) straight length is reached experiment setting value, or open air-introduced machine (7), rotate handle (22),
The wind speed in experiment tunnel (4) straight length is set to reach setting value；Start whole measuring instrumentss, the outer of flame is recorded with digital camera
Shape, the temperature with thermometer and flue gas analyzer record experiment tunnel (4) interior flue gas, O2、CO、CO2、NO、NOxConcentration, use wind
Flow velocity, the flow with flowmeter (12) record combustion gas of fast instrument record flue gas；Pass through control valve (13) and air adjustment ring
(18) and with rotating handle (22) coordinate, to realize the experiment condition under different combustion powers, flame height, extraneous wind speed；Survey
At the end of examination, first air adjustment ring (18) is shut, then turns off the valve (13) of gas bomb (14), rubber tube (11) is extracted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510553241.3A CN105067026B (en) | 2015-08-31 | 2015-08-31 | For studying extraneous wind speed to flame propagation and the device and method of stability influence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510553241.3A CN105067026B (en) | 2015-08-31 | 2015-08-31 | For studying extraneous wind speed to flame propagation and the device and method of stability influence |
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| CN105067026A CN105067026A (en) | 2015-11-18 |
| CN105067026B true CN105067026B (en) | 2017-10-20 |
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| CN109520759A (en) * | 2018-10-26 | 2019-03-26 | 南京航空航天大学 | It is a kind of using aviation kerosine as the premix and pre-evaporation Bunsen burner corrosion chamber of fuel |
| CN110542701A (en) * | 2019-07-08 | 2019-12-06 | 华侨大学 | combustible gas blows out limit testing arrangement |
| CN112014423A (en) * | 2020-07-24 | 2020-12-01 | 国网湖南省电力有限公司 | Fire extinguishing agent fire extinguishing performance testing device |
| CN114508859B (en) * | 2020-11-17 | 2023-11-07 | 云米互联科技(广东)有限公司 | Control method of gas water heater, gas water heater and readable storage medium |
| CN113447526A (en) * | 2021-06-29 | 2021-09-28 | 北京石油化工学院 | Device and method for testing ignition spreading characteristic of dust layer in pipeline |
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| CN100567929C (en) * | 2007-12-11 | 2009-12-09 | 华南理工大学 | Slope adjustable tunnel fire hazard wind tunnel experimental device |
| US8140290B2 (en) * | 2009-03-30 | 2012-03-20 | Advantest Corporation | Transmission characteristics measurement apparatus, transmission characteristics measurement method, and electronic device |
| CN203644291U (en) * | 2013-12-05 | 2014-06-11 | 中国科学技术大学 | Low-pressure airplane cargo bay fire experiment simulation device |
| CN205209521U (en) * | 2015-08-31 | 2016-05-04 | 华南理工大学 | A device for studying external wind speed influences flame propagation and stability |
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