CN104165749A - Experimental device for simulating influence mechanism to flame structure flow field characteristics of bottom cross wind - Google Patents
Experimental device for simulating influence mechanism to flame structure flow field characteristics of bottom cross wind Download PDFInfo
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- CN104165749A CN104165749A CN201410435915.5A CN201410435915A CN104165749A CN 104165749 A CN104165749 A CN 104165749A CN 201410435915 A CN201410435915 A CN 201410435915A CN 104165749 A CN104165749 A CN 104165749A
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Abstract
The invention discloses an experimental device for simulating an influence mechanism to flame structure flow field characteristics of bottom cross wind. The experimental device comprises a combustion box body, a wind tunnel system and a measurement and control system. The bottom of the combustion box body is provided with an open structure, and hollow stainless steel tubes are arranged every 10 cm on the open structure. One side face of the open structure is an observation window, and an operation opening is formed in the middle of the wall face corresponding to the observation window. The wind tunnel system is placed at the bottom of the air tunnel system and comprises a box body, a fan and a rectifying device. The length, the width and the height of the box body are the same as those of the combustion box body. The upper portion of the wind tunnel system is communicated with the bottom of the combustion box body, and the bottom of the wind tunnel system is close to the ground. The fan is placed at one end of the box body, and the other end of the box body is open. The rest two faces are closed by quartz heat insulation plates with the thickness being 8 mm. The experimental device is used for studying the occurrence regularity of internal fires and plume spreading rules in a limited space when the wind is placed at the bottom of a fire source, and a theoretical support is provided for developing related extinguishing methods and control measures.
Description
Technical field
The invention belongs to safety engineering technical field of measurement and test, be specifically related to the experiment test device of disaster combustion.
Background technology
In fire process, extraneous wind plays a decisive role conventionally to the generation of fire and development.On the one hand, wind, by a large amount of fresh airs is provided to combustion zone, impels burning more fierce, and may make ignition zone expand rapidly; On the other hand, wind may make the ashes that extinguish occur revivable situation, causes secondary combustion, increases casualties and property loss.
Use for laboratory is mainly wind-tunnel in acoustic wind to the device of fire combustion effects at present.As: (Tao Changfa, Wang Xishi, Zhang Xiaonan. the impact [J] of changing wind direction ventilation on the pond fire length of flame. combustion science and technology, 2013,19 (3): 261-267.), introduced a kind of wind tunnel experiment device that changing wind direction ventilates on pond fire length of flame impact of testing, it is inner that such device burning things which may cause a fire disaster when measuring is positioned at whole wind-tunnel completely, and in wind-tunnel, wind direction is adjustable, whole sectional wind velocity is even, can acoustic wind combustion position and flow field characteristic under different condition during perpendicular to flame.When such device can not acoustic wind be positioned at burning things which may cause a fire disaster bottom, the burning of wind field top burning things which may cause a fire disaster and smoke plume situation of change.Yet under actual conditions, as: the automobile galloping at all speed, when its nacelle or internal fires, there is by headstock the wind to tailstock direction in bottom, when being subject to the interference of tailstock baffle plate and bottom barrier, along with the expansion in wind speed flow field, bottom wind will exert an influence to top burning.
Summary of the invention
In order to solve the above-mentioned technical matters existing in prior art, the invention provides a kind of bottom transverse of simulating and aweather flame structure and flow field characteristic are affected the experimental provision of mechanism, comprise burning casing, wind tunnel system and TT&C system, described burning bottom half is open design, every 10cm, a hollow stainless-steel tube is set, one of them side is view window, the wall middle part corresponding with view window is gathering hole, described wind tunnel system is positioned at burning bottom half, comprise casing, blower fan and fairing, casing length, width is with highly all identical with combustion burning casing, top is communicated with burning bottom half, bottom ground proximity, blower fan is positioned at one end of casing, the other end of casing opens wide, the quartzy thermal insulation board sealing that it is 8mm that all the other two faces adopt thickness, described fairing is positioned at box house, height is identical with casing, by blower fan wind field out after fairing, can make wind field more even, described TT&C system comprises wind speed measuring apparatus, video camera and electronic balance (10), and described wind speed measuring apparatus and electronic balance are connected to main control computer by data line.
Further, described view window adopts the flame resistant glass that thickness is 5mm to make.
Further, described gathering hole, can freely take off or install, and for preventing smoke spillage, can adopt high temperature resistant tinfoil glue by peripheral sealing in experiment.
Further, described fairing is honeycomb core screens, and mesh diameter is 2mm.
Further, described wind speed measuring apparatus comprises 27 wind speed probes, is array and is evenly arranged in burning things which may cause a fire disaster place, and described video camera and burning things which may cause a fire disaster upper surface are at a surface level, and electronic balance is positioned at burning things which may cause a fire disaster below, for real time record fuel mass, changes.
Further, burning things which may cause a fire disaster and electronic balance are positioned over burning casing away from one end of blower fan, and wind speed measuring apparatus correspondence is arranged at burning things which may cause a fire disaster oil sump top every 0.1m place.
Further, it is 2mm that thickness is placed at described burning casing lower hollow stainless-steel tube middle part, and the quartzy thermal insulation board that width is 0.1m, on electronic balance placement and quartzy thermal insulation board.
Further, described wind tunnel system (11) and burning casing (4) are away from padded 30 ° of one end of blower fan.
When the experimental provision that simulation bottom transverse of the present invention aweather affects mechanism to flame structure and flow field characteristic is used for studying wind and is positioned at burning things which may cause a fire disaster bottom, in the generation of restricted clearance interior fires and pests occurrence rule and plume, spread rule, can be the relevant extinguishing method of development and control measure theory support is provided.
Accompanying drawing explanation
Fig. 1 is that simulation bottom transverse of the present invention aweather affects the structural representation of the experimental provision of mechanism on flame structure and flow field characteristic;
Fig. 2 is the side view of this experimental provision.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
embodiment 1
As illustrated in fig. 1 and 2, simulation bottom transverse of the present invention aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, comprises burning casing 4, wind tunnel system 11 and TT&C system 12, described burning casing 4 is of a size of 5m * 0.5m * 0.5m, bottom is open design, every 10cm, a length being set is 5m, diameter is 2cm, thickness is the hollow stainless-steel tube 3 of 1mm, for ease of observing flame structure and smoke plume flow field characteristic in experiment, one of them side is view window 15, adopt the flame resistant glass that thickness is 5mm to make, the wall middle part corresponding with view window 15 is gathering hole 7, gathering hole 7 is of a size of 0.5m * 1m, two ends, left and right are 2m apart from the size at burning casing 4 two ends, left and right, the quartzy thermal insulation board that employing thickness is 8mm is made, can freely take off or install, for preventing smoke spillage, in experiment, can adopt high temperature resistant tinfoil glue by peripheral sealing, the quartzy thermal insulation board that it is 8mm that burning casing 4 other surfaces adopt thickness is made, wind tunnel system 11 is positioned at burning casing 4 bottoms, comprise casing 13, blower fan 1 and fairing 5, casing length, width and highly all identical with burning casing 4, top is communicated with burning casing 4 bottoms, bottom ground proximity, blower fan 1 is positioned at one end of casing 13, the other end of casing 13 opens wide, the quartzy thermal insulation board sealing that it is 8mm that all the other two faces adopt thickness, fairing 5 is positioned at casing 13 inside, length is 0.1m, height is identical with casing 13, its one end towards blower fan 1 and blower fan 1 distance are 0.2m, for honeycomb core screens, mesh diameter is 2mm, by blower fan 1 wind field 2 out after fairing 5, can make wind field more even, described TT&C system 12 comprises wind speed measuring apparatus 8, video camera 14 and electronic balance 10, wind speed measuring apparatus 8 comprises 27 wind speed probes, be array and be evenly arranged in burning things which may cause a fire disaster 9 places, transverse and longitudinal spacing is 0.1m, video camera 14 and burning things which may cause a fire disaster 9 upper surfaces are at a surface level, electronic balance 10 is positioned at burning things which may cause a fire disaster below, for real time record fuel mass, changes, and wind speed measuring apparatus 8 and electronic balance 10 are connected to main control computer by data line,
During experiment, burning things which may cause a fire disaster 9 fuel adopt kerosene, and oil sump 6 diameters are 20cm, are highly 5cm, and 100ml kerosene is poured in oil sump 6, and oil sump 6, by gathering hole 7, is positioned on electronic balance 10, and electronic balance 10 is positioned on burning casing 4 middle part stainless-steel tubes 3; On oil sump 6 tops, every 0.1m place, arrange the wind speed probe of 3 row 3 row, shutoff operation mouth 7, seals gathering hole around with tinfoil glue; Video camera 14 is positioned over to the position with flame same level; Open video camera 14, regulate focal length, unlocking electronic balance, peeling, open wind speed measuring apparatus 8 control device power supplys, igniting, open blower fan, wind speed is 10m/s, and in this process, the main control computer that the simulating signal that wind speed measuring apparatus 8 obtains is input to TT&C system through digital-to-analog conversion carries out data storage and computing; When the kerosene afterburnt, close main control computer power supply, after the casing 4 that burns is cooling, close blower fan; The present embodiment can be positioned at while burning casing middle part by simulation fire source, the affect rule of bottom wind on its flame structure, plume flow field characteristic.
embodiment 2
In the present embodiment, burning things which may cause a fire disaster 9 and electronic balance 10 are positioned over to burning casing 4 away from one end of blower fan, wind speed measuring apparatus 8 correspondences are arranged at burning things which may cause a fire disaster 9 oil sump 6 tops every 0.1m place, and other settings are identical with embodiment 1; When the present embodiment can simulation fire source be positioned at a side away from blower fan, wall place, the affect rule of bottom wind on top flame structure, plume flow field characteristic.
embodiment 3
In the present embodiment, at burning casing 4 lower hollow stainless-steel tube 3 middle parts, placing thickness is 2mm, the quartzy thermal insulation board that width is 0.1m, and on electronic balance 10 placements and quartzy thermal insulation board, other settings are identical with embodiment 1; The present embodiment can be simulated wind tunnel system 11 and burning while there is restraining mass between casing 4, the affect rule of bottom wind on top flame structure, plume flow field characteristic.
embodiment 4
In the present embodiment, wind tunnel system 11 and burning casing 4 are away from padded 30 ° of one end of blower fan, and other settings are identical with embodiment 1; The present embodiment can be simulated while there is certain angle, the affect rule of bottom wind on top flame structure, plume flow field characteristic.
Claims (8)
1. simulate bottom transverse and aweather flame structure and flow field characteristic are affected the experimental provision of mechanism for one kind, comprise burning casing (4), wind tunnel system (11) and TT&C system (12), it is characterized in that: described burning casing (4) bottom is open design, every 10cm, a hollow stainless-steel tube (3) is set, one of them side is view window (15), the wall middle part corresponding with view window (15) is gathering hole (7), described wind tunnel system (11) is positioned at burning casing (4) bottom, comprise casing (13), blower fan (1) and fairing (5), casing (13) length, width and highly all identical with combustion burning casing (4), top is communicated with burning casing (4) bottom, bottom ground proximity, blower fan (1) is positioned at one end of casing (13), the other end of casing (13) opens wide, the quartzy thermal insulation board sealing that it is 8mm that all the other two faces adopt thickness, described fairing (5) is positioned at casing (13) inside, height is identical with casing (13), by blower fan (1) wind field (2) out after fairing (5), can make wind field more even, described TT&C system (12) comprises wind speed measuring apparatus (8), video camera (14) and electronic balance (10), and described wind speed measuring apparatus (8) and electronic balance (10) are connected to main control computer by data line.
2. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: described view window (15) adopts the flame resistant glass that thickness is 5mm to make.
3. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: described gathering hole (7), can freely take off or install, for preventing smoke spillage, in experiment, can adopt high temperature resistant tinfoil glue by peripheral sealing.
4. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: described fairing (5) is honeycomb core screens, and mesh diameter is 2mm.
5. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: described wind speed measuring apparatus (8) comprises 27 wind speed probes, being array is evenly arranged in burning things which may cause a fire disaster (9) and locates, described video camera (14) and burning things which may cause a fire disaster (9) upper surface are at a surface level, electronic balance (10) is positioned at burning things which may cause a fire disaster below, for real time record fuel mass, changes.
6. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: burning things which may cause a fire disaster (9) and electronic balance (10) are positioned over burning casing (4) away from one end of blower fan, and wind speed measuring apparatus (8) correspondence is arranged at burning things which may cause a fire disaster (9) oil sump (6) top every 0.1m place.
7. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: it is 2mm that thickness is placed at described burning casing (4) lower hollow stainless-steel tube (3) middle part, width is the quartzy thermal insulation board of 0.1m, on electronic balance (10) placement and quartzy thermal insulation board.
8. simulation bottom transverse as claimed in claim 1 aweather affects the experimental provision of mechanism on flame structure and flow field characteristic, it is characterized in that: described wind tunnel system (11) and burning casing (4) are away from padded 30 ° of one end of blower fan.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109459221A (en) * | 2018-11-30 | 2019-03-12 | 卢万达 | A kind of fire balloon jet pipe extinguishing wind speed automatic test equipment and method of igniting |
| CN109459257A (en) * | 2018-11-13 | 2019-03-12 | 重庆大学 | Pilot system is influenced on building structure under a kind of wind fire coupling |
| CN113624908A (en) * | 2021-08-10 | 2021-11-09 | 中国科学技术大学 | Material ignition simulation experiment device |
| CN114269689A (en) * | 2019-09-17 | 2022-04-01 | 奥加诺株式会社 | Water treatment system, control device, water treatment method, and program |
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| CN113624908A (en) * | 2021-08-10 | 2021-11-09 | 中国科学技术大学 | Material ignition simulation experiment device |
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Application publication date: 20141126 |