CN102322739B - Experimental apparatus for diffusion flames in forced convection environment - Google Patents
Experimental apparatus for diffusion flames in forced convection environment Download PDFInfo
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- CN102322739B CN102322739B CN 201110211328 CN201110211328A CN102322739B CN 102322739 B CN102322739 B CN 102322739B CN 201110211328 CN201110211328 CN 201110211328 CN 201110211328 A CN201110211328 A CN 201110211328A CN 102322739 B CN102322739 B CN 102322739B
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Abstract
The invention discloses an experimental apparatus for diffusion flames in a forced convection environment. The apparatus can be used for studying the influence of forced-convection velocities on the characteristics such as height, width, color, oscillation frequency and the like of diffusion flames. The experimental apparatus disclosed by the invention is concretely characterized in that a forced convection generation device is added into the existing experimental apparatus for diffusion flames, and the existing ignition device is replaced with a retractable automatic ignition device, so that the ignition device does not affect a forced convection environment created by the invention. The experimental apparatus disclosed by the invention has an important significance to the study on the combustion mechanism of diffusion flames.
Description
Technical field
The present invention relates to a kind of diffusion flame experimental provision, particularly diffusion flame experimental provision under the forced convection environment.
Background technology
One of major influence factors of diffusion flame burning situation is the forced convection condition, research forced convection condition has very important meaning to the influence of features such as diffusion flame height, width, color, frequency of oscillation to combustion mechanism and the fire image detection The Application of Technology of understanding diffusion flame in depth, but how to obtain various flows after the match the diffusion flame feature never have suitable device.The researcher is many both at home and abroad at present tests at the indoor diffusion flame that carries out of fuel flask, existing diffusion flame device comprises burning cabin, diffusion flame generation device, data acquisition unit etc., described diffusion flame generation device comprises igniter, burner and gas supply device, igniter and burner are in the fuel flask chamber interior, the fuel flask chamber interior also has exhaust fume collecting hood, described exhaust fume collecting hood is placed on fuel flask interior flame central upper portion place, and the bottom surface down; Described burner is stainless steel tube, and described igniter is electric wire filament's fire of punctuating.Existing apparatus can only be studied features such as the height, width, color, frequency of oscillation of diffusion flame under the still air environment, can not produce the forced convection environment.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, diffusion flame experimental provision under a kind of forced convection environment is provided, this experimental provision can produce the forced convection environment, and improves existing igniter, makes igniter not influence the forced convection environment that the present invention creates.
Technical solution of the present invention: diffusion flame experimental provision under a kind of forced convection environment, burning cabin, burner, scalable automatic ignition device, forced convection generation device, fuel supply room; Described forced convection generation device specifically comprises ventilation shaft, blower fan, micropore aluminium honeycomb core, wind-speed adjusting device, machine box etc.; It is characterized in that: will have diffusion flame device fuel flask indoor exhaust fume collecting hood and top cover now and remove, described burning cabin is cuboid, described ventilation shaft integral body is square, the place, right angle is arc transition, be installed in the fuel flask chamber interior, the ventilation shaft air inlet is fixed on the sidewall of burning cabin, communicate with external environment, fixedly there is described blower fan at the air outlet place, horizontal positioned, two described micropore aluminium honeycomb cores have been arranged above and below above the fuel flask indoor fan, leave certain distance between two described micropore aluminium honeycomb cores, described micropore aluminium honeycomb core is the porous flat plate of cuboid, with described burning cabin sidewall for fixedlying connected, the indoor micropore aluminium honeycomb core of fuel flask top is the diffusion flame combustion space, burner is fixed on the micropore aluminium honeycomb core, blower fan adopts the mode of forced draft by ventilation shaft surrounding air to be blown into the combustion space, described machine box is cuboid, be placed on fuel flask outdoor side, three dc sources and a wireless remote control module are arranged in the machine box, one of them dc source links to each other with wireless remote control module, and have control this wireless remote control module work radio remote control switch, radio remote control switch is a movably remote control switch, be used for manually-operated control, another dc source links to each other with electromagnet with two time relays, one way switch of wireless remote control module links to each other with the time relay, the 3rd dc source links to each other with blower fan, fixedly there is power switch and the wind-speed adjusting device that links to each other with described blower fan the side of machine box outside, be used for the described blower fan wind speed of control, fuel flask outdoor another side is the fuel supply room, internal fixation has low pressure gas cylinder, the low pressure gas cylinder outlet is installed with pressure-reducing valve, be installed with flow controller on the gas pipeline of pressure-reducing valve outlet, the gas pipeline of flow controller outlet links to each other with burner by T connector.
Described scalable automatic ignition device comprises the protection cavity, the protection cavity is cuboid, be provided with an end spring of fixedlying connected with described protection cavity and the iron pipe of fixedlying connected with described spring right-hand member in it, electromagnet links to each other with described dc source, and all be positioned at the other end of described spring with iron pipe, be flexible connection between insulation tube and the protection cavity, and fixedly connected with described iron pipe, its inside is embedded with two iron staffs and stretches out insulation tube one segment distance and links to each other with heating wire, fixedly there is protective cap the end of described insulation tube, also fixedly there are very first time relay and second time relay in protection inside cavity bottom surface, and exterior lateral sides fixedly has the hand switch that links to each other with described electromagnet; Iron pipe, insulation tube, two iron staffs, protective caps are cylindrical; the diameter of iron pipe and protective cap is greater than the insulation tube diameter; putting the back above-below direction well is radial direction; insulation tube is positioned at micropore aluminium honeycomb core top, and insulation tube is flexible connection with the burning cabin, and electromagnet pastes mutually with iron pipe; inhale mutually with iron pipe the energising back; very first time relay is in normally open, and second time relay is in normally off, and the time relay is used for the described DC power supply time of control.
The present invention's advantage compared with prior art is:
(1) the present invention has added the forced convection generation device in existing diffusion flame experimental provision, has realized diffusion flame experiment under the forced convection condition of the experimental provision (as hypobaric chamber, hyperbaric chamber) in some environmental simulations.
(2) the present invention is designed to scalable automatic ignition device with igniter, makes igniter not influence the forced convection environment that the present invention creates.
(3) the present invention can be applied to study changing features such as diffusion flame height, width, color, frequency of oscillation under the forced convection environment, for combustion mechanism and the fire image detection The Application of Technology of understanding diffusion flame in depth has very important meaning, all can provide the support of experimental study to the research of above-mentioned research field.
Description of drawings
Fig. 1 is that diffusion flame experimental provision of the present invention is arranged schematic diagram;
Fig. 2 is scalable automatic ignition device schematic diagram among the present invention;
Fig. 3 is the internal structure schematic diagram of machine box among the present invention.
Among the figure: 1; the burning cabin, 2; igniter, 3; the micropore aluminium honeycomb core; 4; the machine box, 5; blower fan, 6; ventilation shaft; 7; glass window, 8; burner, 9; pressure-reducing valve; 10; low pressure gas cylinder, 11; flow controller, 12; video camera; 13; spring, 14; the protection cavity, 15; iron pipe; 16; protective cap, 17; very first time relay, 18; second time relay; 19; hand switch 20; electromagnet, 21; insulation tube, 22; iron staff; 23; heating wire; 24; wireless remote control module, 25; power switch, 26; radio remote control switch; 27; dc source, 28; wind-speed adjusting device.
The specific embodiment
As shown in Figure 1, the present invention includes burning cabin 1, burner 8, scalable automatic ignition device 2, forced convection generation device, machine box 4, fuel supply room.Burning cabin 1 is cuboid, ventilation shaft 6 integral body are square, the place, right angle is arc transition, be installed in burning 1 inside, cabin, ventilation shaft 6 air inlets are fixed on 1 sidewall of burning cabin, communicate with external environment, fixedly there is blower fan 5 at the air outlet place, horizontal positioned, burning 1 inner blower, 5 tops, the cabin two described micropore aluminium honeycomb cores 3 that have been arranged above and below, leave certain distance between two described micropore aluminium honeycomb cores 3, described micropore aluminium honeycomb core 3 is the porous flat plate of cuboid, with described burning cabin 1 sidewall for fixedlying connected, micropore aluminium honeycomb core 3 tops are the diffusion flame combustion space in the burning cabin 1, burner 8 is fixed on the micropore aluminium honeycomb core 3, the mode that blower fan 5 adopts forced drafts is blown into the combustion space by ventilation shaft 6 with surrounding air, machine box 4 is cuboid, be placed on burning cabin 1 exterior lateral sides, three dc sources 27 and a wireless remote control module 24 are arranged in the machine box 4, one of them dc source links to each other with wireless remote control module 24, another dc source links to each other with electromagnet 20 with two time relays, one way switch of wireless remote control module 24 links to each other with two time relays, the 3rd dc source links to each other with blower fan 5, fixedly there is power switch 25 and the wind-speed adjusting device 28 that links to each other with described blower fan 5 side of machine box 4 outsides, be used for described blower fan 5 wind speed of control, the radio remote control switch 26 of controlling described wireless remote control module 24 work is a movably remote control switch, be used for manually-operated control, burning 1 outside another side, cabin is the fuel supply room, internal fixation has low pressure gas cylinder 10, low pressure gas cylinder 10 outlets are installed with pressure-reducing valve 9, be installed with flow controller 11 on the gas pipeline of pressure-reducing valve 9 outlets, the gas pipeline of flow controller 11 outlets links to each other with burner 8 by T connector; Scalable automatic ignition device 2 comprises protection cavity 14, protection cavity 14 is cuboid, be provided with an end and protection cavity 14 spring 13 of fixedlying connected and the iron pipe 15 of fixedlying connected with spring 13 right-hand members in it, electromagnet 20 links to each other with power supply 27, and all be positioned at the other end of described spring 13 with iron pipe 15, be flexible connection between insulation tube 21 and the protection cavity 14, and fixedly connected with described iron pipe 15, its inside is embedded with two iron staffs 22 and stretches out insulation tube 21 1 segment distances and links to each other with heating wire 23, fixedly there is protective cap 16 end of described insulation tube 21, protection cavity 14 inner bottom surface also fixedly have very first time relay 17 and second time relay 18, and exterior lateral sides fixedly has the hand switch 19 that links to each other with described electromagnet 20; Iron pipe 15, insulation tube 21, two iron staffs 22, protective caps 16 are cylindrical; the diameter of iron pipe 15 and protective cap 16 is greater than insulation tube 21 diameters; putting the back above-below direction well is radial direction; insulation tube 21 is positioned at micropore aluminium honeycomb core 3 tops; insulation tube 21 is flexible connection with burning cabin 1, and electromagnet 20 pastes mutually with iron pipe 15, and inhale mutually with iron pipe 15 the energising back; very first time relay 17 is in normally open, and second time relay 18 is in normally off.Described heating wire 23 is placed on top, burner 8 exits, is used for lighting gas.The setting-up time of the material of the size of low pressure gas cylinder 10, heating wire 23 and length, the time relay, the diameter of nozzle etc. all can be determined according to the experiment needs.
In the experimentation, used parameter acquisition instrument can determine that the image information that the embodiment of the invention adopts video camera 12 to gather flame is in the whole experiment according to the experiment needs, video camera 12 is in start shooting state, and there is glass window 7 burning 1 side, cabin among the present invention.Process is as follows:
Open fan power switch 25, dc source 27 provides power supply for blower fan, blower fan is started working, produce air flow field, reach the required wind speed of experiment by regulating wind-speed adjusting device 28, surrounding air is delivered to burning cabin 1 by ventilation shaft 6, air-flow at first enters one section space behind the current stabilization through a slice micropore aluminium honeycomb core 3, make air-flow be more evenly distributed through second micropore aluminium honeycomb core 3 again and stablize, enter space, burner 8 place at last, it is the diffusion flame combustion space, open pressure-reducing valve 9, fuel gas in the low pressure gas cylinder 10 is delivered to burner 8 by gas pipeline, regulates flow controller 11 to the flow velocity of experiment desired gas fuel, and gaseous fuel enters the forced convection environment; Press hand switch 19, dc source 27 is electromagnet 20 power supplies, iron pipe 15 is mobile in protection cavity 14 under the effect of electromagnet 20 suction, and with spring 13 stretchings, insulation tube 21 reaches burner 8 tops simultaneously, press a way switch of radio remote control switch 26, one way switch closure of wireless remote control module 24, dc source 27 is very first time relay and the power supply of second time relay, very first time relay 17 is closed in setting-up time, heating wire 23 energisings begin igniting, second time relay 18 disconnects in setting-up time, heating wire 23 and electromagnet 20 outages, and igniting is finished, the suction of 20 pairs of iron pipes 15 of electromagnet disappears, and iron pipe 15 is withdrawn under the restoring force effect of spring in the protection cavity 14 with the insulation tube 21 that links to each other with iron pipe; The change of air-flow makes burning situation change, influenced the Air Entrainment of flame, make the parameter attribute such as height, width of diffusion flame change, because of ventilation shaft 6 and environmental communication, burning 1 top, cabin is open, experimentizes so the present invention can directly be placed under the varying environment according to the experiment needs.
Claims (6)
1. diffusion flame experimental provision under the forced convection environment is characterized in that comprising: burning cabin (1), burner (8), scalable automatic ignition device (2), forced convection generation device, fuel supply room and machine box (4); Ventilation shaft (6) is installed in burning inside, cabin (1), ventilation shaft (6) air inlet is fixed on the sidewall of burning cabin (1), communicate with external environment, fixedly there is blower fan (5) at ventilation shaft (6) air outlet place, two micropore aluminium honeycomb cores (3) have been arranged above and below above burning cabin (1) inner blower (5), leave distance between described two micropore aluminium honeycomb cores (3), micropore aluminium honeycomb core (3) and burning cabin (1) sidewall are for fixedlying connected, and micropore aluminium honeycomb core (3) top is the diffusion flame combustion space; Burner (8) is fixed on the micropore aluminium honeycomb core (3); Blower fan (5) adopts the mode of forced draft by ventilation shaft (6) surrounding air to be blown into the combustion space; Machine box (4) is placed on burning cabin (1) exterior lateral sides, three dc sources (27) and a wireless remote control module (24) are arranged in the machine box (4), and be furnished with and control the radio remote control switch (26) that this wireless remote control module (24) is worked, radio remote control switch (26) is a movably remote control switch, be used for manually-operated control, wherein first dc source (27) links to each other with wireless remote control module (24), second dc source (27) links to each other with electromagnet (20) with two time relays, one way switch of wireless remote control module (24) links to each other with two time relays, the 3rd dc source (27) links to each other with blower fan (5), fixedly there is power switch (25) and the wind-speed adjusting device (28) that links to each other with blower fan (5) the outside side of machine box (4), is used for control blower fan (5) wind speed; The scalable automatic ignition device of (2) is placed on top, burner (8) exit, is used for lighting gas.
2. diffusion flame experimental provision under the forced convection environment according to claim 1, it is characterized in that: described scalable automatic ignition device (2) comprises protection cavity (14), be provided with spring (13) and iron pipe (15) in the described protection cavity (14), one end of spring (13) is fixedlyed connected with protection cavity (14), and the other end of spring (13) is fixedlyed connected with iron pipe (15); Electromagnet (20) links to each other with second dc source (27), and all is positioned at the other end of spring (13) with iron pipe (15); Be flexible connection between insulation tube (21) and the protection cavity (14), and fixedly connected with iron pipe (15), insulation tube (21) inside is embedded with two iron staffs (22), two iron staffs (22) stretch out insulation tube (21) one segment distances and link to each other with heating wire (23), fixedly there is protective cap (16) end of insulation tube (21), protection cavity (14) inner bottom surface also fixedly has very first time relay (17) and second time relay (18), and protection cavity (14) exterior lateral sides fixedly has the hand switch (19) that links to each other with electromagnet (20); Insulation tube (21) is positioned at micropore aluminium honeycomb core (3) top, insulation tube (21) is flexible connection with burning cabin (1), electromagnet (20) pastes mutually with iron pipe (15), inhale mutually with iron pipe (15) the energising back, very first time relay (17) is in normally open, second time relay (18) is in normally off, and heating wire (23) is placed on top, burner (8) exit, is used for lighting gas.
3. diffusion flame experimental provision under the forced convection environment according to claim 1, it is characterized in that: described micropore aluminium honeycomb core (3) is the porous flat plate of cuboid.
4. diffusion flame experimental provision under the forced convection environment according to claim 2, it is characterized in that: described protection cavity (14) is cuboid.
5. diffusion flame experimental provision under the forced convection environment according to claim 2; it is characterized in that: described iron pipe (15), insulation tube (21), two iron staffs (22), protective cap (16) are cylindrical; the diameter of iron pipe (15) and protective cap (16) is greater than insulation tube (21) diameter, and putting the back above-below direction well is radial direction.
6. diffusion flame experimental provision under the forced convection environment according to claim 1 is characterized in that: described burning cabin (1) is cuboid, and ventilation shaft (6) integral body is square, and the place, right angle is arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211328 CN102322739B (en) | 2011-07-27 | 2011-07-27 | Experimental apparatus for diffusion flames in forced convection environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110211328 CN102322739B (en) | 2011-07-27 | 2011-07-27 | Experimental apparatus for diffusion flames in forced convection environment |
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| Publication Number | Publication Date |
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| CN102322739A CN102322739A (en) | 2012-01-18 |
| CN102322739B true CN102322739B (en) | 2013-07-17 |
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| CN 201110211328 Expired - Fee Related CN102322739B (en) | 2011-07-27 | 2011-07-27 | Experimental apparatus for diffusion flames in forced convection environment |
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| CN103884023B (en) * | 2014-04-22 | 2016-04-13 | 中国科学技术大学 | A kind of telescopic flammable liquid igniter |
| CN105004580B (en) * | 2015-07-28 | 2018-04-10 | 中国科学技术大学 | It is a kind of automatic ignition and the electrified wire combustion experimental device and method of cigarette to be adopted |
| CN105114980B (en) * | 2015-09-24 | 2018-03-27 | 贵州福泉川东化工有限公司 | A kind of yellow phosphoric tail gas ignition method and its device |
| CN113465061B (en) * | 2021-07-06 | 2022-08-09 | 辰航新材料科技有限公司 | Self-cleaning type cold and warm radiation aluminum plate |
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| US3418060A (en) * | 1967-05-25 | 1968-12-24 | Eclipse Fuel Eng Co | Nozzle mixing gas burner |
| DE3939943A1 (en) * | 1989-12-02 | 1991-06-06 | Ruhrgas Ag | Forced-draught burner operating method - continues fuel supply for set period after turning off |
| CN1467036A (en) * | 2002-07-12 | 2004-01-14 | 中国科学技术大学 | Strile-back experiment equipment |
| US6979433B1 (en) * | 2001-05-16 | 2005-12-27 | University Of Kentucky Research Foundation | Synthesis of multi-wall carbon nanotubes using unseeded hydrocarbon diffusion flames |
| CN101691924A (en) * | 2009-10-21 | 2010-04-07 | 北京航天动力研究所 | Water coal slurry pressure gasification process burner device with ignition device |
-
2011
- 2011-07-27 CN CN 201110211328 patent/CN102322739B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418060A (en) * | 1967-05-25 | 1968-12-24 | Eclipse Fuel Eng Co | Nozzle mixing gas burner |
| DE3939943A1 (en) * | 1989-12-02 | 1991-06-06 | Ruhrgas Ag | Forced-draught burner operating method - continues fuel supply for set period after turning off |
| US6979433B1 (en) * | 2001-05-16 | 2005-12-27 | University Of Kentucky Research Foundation | Synthesis of multi-wall carbon nanotubes using unseeded hydrocarbon diffusion flames |
| CN1467036A (en) * | 2002-07-12 | 2004-01-14 | 中国科学技术大学 | Strile-back experiment equipment |
| CN101691924A (en) * | 2009-10-21 | 2010-04-07 | 北京航天动力研究所 | Water coal slurry pressure gasification process burner device with ignition device |
Non-Patent Citations (1)
| Title |
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| 张永生，穆克进，张哲巅，王岳，肖云汉.不同空气和燃料旋流强度下合成气稀释扩散火焰特性研究.《中国电机工程学报》.2009,第29卷(第2期),63-65. * |
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