CN210295491U - Experimental device for research oil bath conflagration boiling combustion phenomenon - Google Patents
Experimental device for research oil bath conflagration boiling combustion phenomenon Download PDFInfo
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- CN210295491U CN210295491U CN201920887496.7U CN201920887496U CN210295491U CN 210295491 U CN210295491 U CN 210295491U CN 201920887496 U CN201920887496 U CN 201920887496U CN 210295491 U CN210295491 U CN 210295491U
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Abstract
The utility model discloses an experimental device for researching the boiling combustion phenomenon of oil pool fire, which comprises a fire scene simulation system, a fuel monitoring system and a measuring system; the fire scene simulation system comprises a transverse wind generating device, and the transverse wind generating device is connected with a limited space; the fuel monitoring system includes a camera; the measuring system comprises a liquid fuel quality change measuring module and a temperature measuring module. The device can comprehensively simulate the fire scene in special building facilities, and research the influence of a limited space on the boiling combustion development of liquid by changing the size and the position of the top opening; simulating a ventilation system in a special building facility by changing the speed of transverse wind, and revealing the influence rule of environmental convection on liquid boiling combustion; the real fire scene environment can be simulated through the heat radiation module, and then technical support is provided for researching the boiling combustion phenomenon of liquid in the oil pool in the special environmental facility.
Description
Technical Field
The utility model relates to a conflagration dynamics technical field particularly, relates to an experimental apparatus of research oil bath conflagration boiling combustion phenomenon.
Background
Different openings and ventilation conditions are required to be designed in the basement, the cargo storage room, the aircraft cargo hold, the ship, the naval vessel and other building facilities for realizing specific functions, and compared with the common vertical opening type ground building, the special fire disaster type ground building has specificity, and is reflected in the special fire disaster type, the special fire disaster load body and the special structure of the building. A large amount of combustible liquid such as fuel oil, lubricating oil, cleaning agent and the like is generally stored in the building facilities, and once the combustible liquid suddenly overflows from the storage container and is contacted with electronic equipment or a high-temperature heat source, a flowing fire disaster, a jet fire disaster, a pool fire disaster and the like can be caused. The deep research on the liquid combustion rule under the special boundary condition has important significance for preventing and extinguishing special fire in the building facilities. The scholars find out a special liquid boiling combustion phenomenon by researching important fire parameters such as gas temperature distribution, gas concentration distribution, fuel combustion rate and the like of liquid pool fire combustion in a limited space, and the uneven distribution of oxygen concentration can cause flames to swim along the wall after the pool fire boiling combustion, so that secondary disasters with great harm such as backfire, flashover and the like are induced. At present, no report of the phenomenon of liquid boiling combustion in a freely open pool fire exists, and the critical condition of the liquid pool fire boiling combustion, the form change rule of flame in the boiling combustion state, the time-space distribution rule of smoke flowing, the time-space distribution rule of temperature and the like are deeply researched.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides an experimental apparatus of oil bath conflagration boiling combustion phenomenon can overcome prior art's the aforesaid not enough.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
an experimental device for researching the boiling combustion phenomenon of an oil pool fire comprises a fire scene simulation system, a fuel monitoring system and a measuring system; the fire scene simulation system comprises a transverse wind generating device, and the transverse wind generating device is connected with a limited space; the fuel monitoring system includes a camera; the measuring system comprises a liquid fuel quality change measuring module and a temperature measuring module;
a fan section, a diffusion section and a rectification section are sequentially arranged in the transverse wind generating device, a fan is arranged in the fan section, and the fan is electrically connected with a power supply system; an oil pool is arranged in the limited space;
the fuel mass change measuring module comprises an electronic balance, the electronic balance is located below the oil pool, the temperature measuring module is a plurality of thermocouples, and the electronic balance and the thermocouples are in signal connection with the data acquisition system.
Further, the electronic balance is mounted on the tray.
Furthermore, the electronic balance is in signal connection with the data acquisition system through an RS 485-to-USB connecting line.
Further, a radiation generator is arranged outside the restricted space.
Furthermore, the thermocouples are uniformly distributed in and above the oil pool.
The utility model has the advantages that: the device can comprehensively simulate the fire scene in special building facilities, and research the influence of a limited space on the boiling combustion development of liquid by changing the size and the position of the top opening; simulating a ventilation system in a special building facility by changing the speed of transverse wind, and revealing the influence rule of environmental convection on liquid boiling combustion; the real fire scene environment can be simulated through the heat radiation module, and then technical support is provided for researching the boiling combustion phenomenon of liquid in the oil pool in the special environmental facility.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an experimental apparatus for studying boiling combustion phenomenon of an oil pool fire according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fuel mass change measurement module according to an embodiment of the present invention;
fig. 3 is a distribution diagram of thermocouples for measuring the temporal and spatial distribution of the liquid temperature of the oil pool in the horizontal direction according to the embodiment of the invention;
fig. 4 is a distribution diagram of thermocouples in the vertical direction for measuring the temporal and spatial distribution of the liquid temperature of the oil pool according to the embodiment of the present invention;
fig. 5 is a distribution diagram of a thermocouple for monitoring temperature variation of an oil pool wall according to an embodiment of the present invention;
in the figure: 1. the device comprises a transverse wind generating device 10, a power supply system 11, a fan section 12, a diffusion section 13, a rectifying section 14, a fan 2, a limited space 21, an oil pool 22, a top opening 3, an electronic balance 4, a data acquisition system 5, a camera 6 and a thermocouple.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
As shown in fig. 1-5, the experimental apparatus for researching the boiling combustion phenomenon of an oil pool fire according to the embodiment of the present invention includes a fire scene simulation system, a fuel monitoring system and a measurement system; the fire scene simulation system comprises a transverse wind generating device 1, wherein the transverse wind generating device 1 is connected with a limited space 2; outside the confined space 2 a radiation generator is arranged. The fuel monitoring system comprises a camera 5, and can monitor the liquid level height change in real time; the measuring system comprises a liquid fuel quality change measuring module, a temperature measuring module and a flame form measuring device, and dynamic parameters before and after liquid boiling combustion can be measured in real time; a fan section 11, a diffusion section 12 and a rectification section 13 are sequentially arranged in the transverse wind generating device 1, a fan 14 is arranged in the fan section 11, and the fan 14 is electrically connected with a power supply system 10; an oil pool 21 is arranged in the limited space 2; the fuel mass change measuring module comprises an electronic balance 3, the electronic balance 3 is arranged on the tray and is positioned below the oil pool 21, and the electronic balance 3 is in signal connection with the data acquisition system 4 through an RS 485-USB connecting line; the temperature measuring module is a plurality of thermocouples 6, and the thermocouples 6 are in signal connection with the data acquisition system 4. The thermocouples are evenly distributed in the oil sump 21 and above the oil sump 21.
The temperature measuring module is a three-beam thermocouple. The first bundle of thermocouples is used for measuring the time-space distribution of the liquid temperature of the oil pool, 9 0.5mm sheathed (K-type) thermocouples are radially arranged in the horizontal direction with the middle of the oil pool as the center of a circle and the radius of 5cm, and 9 sections of thermocouples are distributed below the liquid level in the vertical direction; the second thermocouple is used for monitoring the temperature change of the wall of the fire pool, and 4 thermocouples are distributed in the height of 27 mm; the third thermocouple is arranged in the flame, 5 thermocouples are evenly arranged in the radial range of the oil pool in the horizontal direction, and 10 thermocouples are evenly arranged in the range from the position above the liquid level to the position below the top of the restricted space. The data acquisition system is monitored by the console.
Referring to FIGS. 3-5, nine thermocouples were placed in the fuel in the center of the sump at distances of 1mm, 2mm, 3.5 mm, 5mm, 6.5mm, 8mm, 10mm, 11mm, and 12mm from the bottom of the sump, respectively, and labeled TC 1-TC 9. Four thermocouples of TC10 to TC13 were arranged on the inner wall of the oil sump at heights of 2mm, 6.5mm, 12mm and 27mm, respectively.
The transverse wind generating device 1 has a total length of 3m, a width of 0.6m and a height of 1 m. The length of the fan section, the diffusion section and the rectification section is 0.6m, and the total length of the limited space section 6 and the outlet section is 1.2 m. The front surface of the restricted space section 6 is made of 3mm tempered glass, and the rest of the housing is made of 3mm thick stainless steel. The transverse wind generating device 1 can provide uniform and stable transverse wind with the wind speed of 0.1-3 m/s. The heat radiation plate is connected to the transformer, the radiation flux of the heat radiation plate is changed by changing the power supply voltage, and the relation between the radiation flux and the power supply voltage is calibrated according to the water-cooled bolometer before use, so that the radiation generator can supply radiation with the intensity ranging from 10 kw to 50 kw. At the top of the confined space 2 there is a square horizontal opening 22, 6 horizontal opening sizes can be set: 25cm2(5cm×5cm)，100 cm2(10cm×10cm)，225 cm2(15cm×15cm)，400 cm2(20cm×20cm)，625 cm2(25 cm. times.25 cm) and 900 cm2(30 cm. times.30 cm). The circular oil pool 21 is placed in the center of the bottom of the limited space section 2, the diameter of the oil pool 21 is 10cm, 14cm and 20cm, the height of the pool wall of the oil pool 21 is 4cm, and the thickness of the wall surface and the bottom surface are both 3 mm. The wall surface of the oil pool 21 can be provided with scales, and the height change of the liquid level can be monitored in real time through the camera 7. And (3) recording the mass change of the fuel in real time by using the electronic balance 3 in the experimental process so as to obtain the mass loss rate of the fuel and characterize the combustion intensity of the pool fire. The electronic balance 3 is arranged below the oil pool 21, the measuring range is 6.2 kg, and the precision is highWas 0.01 g.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.
In particular use, the transverse wind generating device 1 simulates a ventilation system in a special building facility; the radiation generator simulates the heat release effect of other combustible materials in the fire; the limited space 2 simulates the opening condition in a special building facility by changing the size and the position of the top opening 22, the data acquisition system 4 acquires the fuel quality change in the oil pool in real time, the fuel monitoring system monitors the oil level height change by the camera 7, calibrated scale marks are engraved on the wall of the oil pool, and the scale marks are opposite to the camera. The data acquisition system is monitored by the console.
The working process 1 of the experimental device is as follows: the setting area is 25cm2Arranging a thermocouple at a square horizontal opening of (5cm multiplied by 5cm), adjusting an electronic balance, and pouring n-heptane with the preheating temperature of 320K and the concentration of more than 98 percent into a circular oil pool with the diameter of 10cm, wherein the depth of the oil pool is 1.3 cm; starting a data acquisition system, igniting the fuel, and recording the consumption rate of the fuel by a fuel mass change measuring module through an electronic balance and a signal transmission device thereof; the temperature measuring module calculates the average temperature in the horizontal direction by measuring the liquid fuel in the oil pool and the internal and external temperature distribution of the flame and weighting thermocouples at different positions; recording the height change of the liquid level and the change of the flame form by using a camera; judging a critical value of the boiling combustion of the oil pool according to the temperature distribution and the change of the combustion rate under different opening conditions; the fire dynamics parameters of the pool fire in a boiling combustion state are revealed.
The working process 2 of the experimental device is as follows: the fixed horizontal opening area is 25cm2(5cm multiplied by 5cm), repeating the preparation work in the working process 1, adjusting the transverse wind speed, igniting the fuel, and recording the consumption rate of the fuel, the liquid fuel, the internal and external temperature distribution of the flame, the height change of the liquid level and the change of the flame form by adopting a data acquisition system in the working process 1; representing a response rule that the boiling combustion critical value of the oil pool changes along with the transverse wind speed; revealing cross-wind to pool fire boilingThe fire dynamics of the combustion state influence the law.
The working process 3 of the experimental device is as follows: the fixed horizontal opening area is 25cm2(5cm × 5cm), repeating the preparation work in the working process 1, setting a radiation power supply voltage according to a relationship between a pre-calibrated power supply voltage and a radiation flux, igniting the fuel, and recording the consumption rate of the fuel, the distribution of the liquid fuel and the internal and external temperature of the flame, the height change of the liquid level and the change of the flame form by adopting a data acquisition system in the working process 1; representing a response rule that an oil pool boiling combustion critical value changes along with external heat radiation flux; and disclosing the influence rule of external radiation on fire dynamics parameters of the boiling combustion state of the pool fire.
The working process 4 of the experimental device is as follows: changing the initial temperature of the fuel, the horizontal opening area, the transverse wind field and the external radiation flux in a coupling manner, repeating the preparation work in the working process 1, igniting the fuel, and recording the consumption rate of the fuel, the distribution of the liquid fuel and the internal and external temperature of the flame, the height change of the liquid level and the change of the flame form by adopting a data acquisition system in the working process 1; an orthogonal analysis method is adopted to represent a response rule that the boiling combustion critical value of the oil pool is changed along with the multi-parameter coupling of the initial temperature of the fuel, the opening condition, the transverse wind field and the external radiation flux; and disclosing the influence rule of opening conditions, transverse wind fields and external radiation flux multi-parameter coupling on fire dynamics parameters of the boiling combustion state of pool fire.
To sum up, with the aid of the above-mentioned technical scheme of the utility model, change oil bath fire burning border condition through changing confined space open-ended size and position, simulation transverse wind, external radiation, confined space conflagration scene. The liquid level height in the oil pool, the wall surface of the oil pool and the liquid temperature in the combustion process are measured in real time, the liquid mass loss rate before and after boiling combustion, the flame temperature distribution, the flame shape and the like are measured in real time, the boiling combustion characteristics of the liquid and the response rule of the boiling combustion characteristics of the liquid along with the change of boundary conditions can be comprehensively researched, and the method has important significance for comprehensively researching the boiling combustion characteristics of the fire in the pool in special building facilities.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An experimental device for researching the boiling combustion phenomenon of a fire disaster in an oil pool is characterized by comprising a fire scene simulation system, a fuel monitoring system and a measuring system; the fire scene simulation system comprises a transverse wind generating device (1), wherein the transverse wind generating device (1) is connected with a limited space (2); the fuel monitoring system comprises a camera (5); the measuring system comprises a liquid fuel quality change measuring module and a temperature measuring module;
a fan section (11), a diffusion section (12) and a rectification section (13) are sequentially arranged in the transverse wind generating device (1), a fan (14) is arranged in the fan section (11), and the fan (14) is electrically connected with a power supply system (10); an oil pool (21) is arranged in the limited space (2);
the fuel mass change measuring module comprises an electronic balance (3), and the electronic balance (3) is positioned below the oil pool (21); the temperature measuring module is a plurality of thermocouples (6); the electronic balance (3) and the thermocouple (6) are in signal connection with the data acquisition system (4).
2. The experimental apparatus for researching the boiling combustion phenomenon of the oil pool fire is characterized in that the electronic balance (3) is installed on a tray.
3. The experimental device for researching the boiling combustion phenomenon of the fire in the oil pool according to the claim 1, wherein the electronic balance (3) is in signal connection with the data acquisition system (4) through an RS 485-USB connection line.
4. The experimental apparatus for studying boiling combustion phenomenon of oil pool fire as claimed in claim 1, wherein a radiation generator is provided outside the confined space (2).
5. The experimental apparatus for researching oil pool fire boiling combustion phenomenon as claimed in claim 1, wherein said thermocouples are uniformly distributed in the oil pool (21) and above the oil pool (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920887496.7U CN210295491U (en) | 2019-06-13 | 2019-06-13 | Experimental device for research oil bath conflagration boiling combustion phenomenon |
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| CN201920887496.7U CN210295491U (en) | 2019-06-13 | 2019-06-13 | Experimental device for research oil bath conflagration boiling combustion phenomenon |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113450613A (en) * | 2021-05-28 | 2021-09-28 | 中国矿业大学(北京) | Device and method for simulating influence of high-temperature heat-conducting component on fire extinguishing |
| CN114674584A (en) * | 2022-03-09 | 2022-06-28 | 中国辐射防护研究院 | Large-scale mobile experimental device for simulating pool fire in finite space |
-
2019
- 2019-06-13 CN CN201920887496.7U patent/CN210295491U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113450613A (en) * | 2021-05-28 | 2021-09-28 | 中国矿业大学(北京) | Device and method for simulating influence of high-temperature heat-conducting component on fire extinguishing |
| CN113450613B (en) * | 2021-05-28 | 2022-07-08 | 中国矿业大学(北京) | Device and method for simulating influence of high-temperature heat-conducting component on fire extinguishing |
| CN114674584A (en) * | 2022-03-09 | 2022-06-28 | 中国辐射防护研究院 | Large-scale mobile experimental device for simulating pool fire in finite space |
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