CN104614485B - A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment and experimental technique thereof - Google Patents

Abstract

The invention discloses a kind of experimental provision containing additive fine mist fire-fighting efficiency assessment and experimental technique thereof, this device includes oxidant stream weight feed and the transport system being made up of frequency conversion whirlpool blower fan, vortex-shedding meter, small-sized wind tunnel, atomising device, sprayer support, the fuel gas weight feed being made up of column-shaped porous burner, automatic gas distribution system and transport system, the sign system being made up of with flame interaction finder, flame temperature metering device and condensed phase particle diameter, velocity measuring device water mists, data acquisition and tele-control system.Present invention achieves the weight feed of air and fuel gas, the distribution of liquid phase extinguishing chemical particle diameter, burst size and the adjustability of additive concentration, the sign of temperature, grain diameter and speed near stagnation point.This device can be used for: 1) screening efficient water mists additive, qualitative assessment additive types, concentration etc. are for the fire suppression effectiveness of specific flame；2) physics of researching condensed rephasing extinguishing chemical and flame interaction and chemism.

Description

A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment and experimental technique thereof

Technical field

The present invention relates to technical field of fire hazard safety, be specifically related to a kind of fine mist fire-fighting efficiency assessment experimental provision Han additive And experimental technique.

Background technology

Water mists is the extinguishing chemical of a kind of clean and effective, and its main extinguishing mechanism is cooling, starvation and degrading radiation.For Improve the extinguishing property of water mists, some physics and chemical addition agent be used for improving the atomization characteristics of water mists, wetting characteristics, Flame chemistry rejection characteristic etc..But, the water mists suppression containing heterogeneity additive is different with the performance of knock down the flame, needs The factor of additive to affect fine mist fire-fighting ability is carried out quantitatively characterizing, research water smoke and the mechanism of action of flame, thus sieves Select efficient water mists additive.

At present people generally use when assessing extinguishing chemical suppression knock down the flame ability cup burner, plane flames in opposing direction burner, Device or the methods such as reduced scale cun or full scale tests, blast ball, shock tube, flame combustion pipe, wherein cup burner, Plane flames in opposing direction burner and reduced scale cun or full scale tests can be used for the research assessing extinguishing chemical with diffusion flame effect, Blast ball, shock tube and flame combustion pipe are applicable to the research assessing extinguishing chemical with premixed flame effect.In general fire, expand Scattered flame is the most common form, and therefore the former result of the test more can reflect that the ability of general fire is extinguished in extinguishing chemical suppression. The standard relating to cup burner in the world has many, such as NFPA 2001 (Standard on Clean Agent Fire Extinguishing Systems)、ISO 14520-Part 1(Gaseous fire-extinguishing systems-Physical properties and system design).The flame of cup burner is coaxial diffusion flame, the reaction core that rim of a cup top is formed It it is the key of flame stabilization.But, in standard, the cup burner of regulation is only applicable to assess the extinguishing property of gaseous fire extinguishing agent, The suitability for condensed phase extinguishing chemical is not specified by.China Science & Technology University Ph.D. Dissertation (20060401) " many groups The simulation study that point water mists interacts with diffusion flame " in describe and utilize cup burner research water mists and flame interaction Method, but the shortcoming that the method exists optical measurement difficulty, wall loss is serious, water smoke difficult quantitation, consumption are big, It is not suitable for screening water mists additive.In plane flames in opposing direction burner, combustible gas stream is reverse with the oxidant stream being loaded with extinguishing chemical Flowing, forms plane flames in opposing direction.Although this burner energy fixing quantity condensed phase extinguishing chemical burst size, sign condensed phase fire extinguishing The particle diameter distribution of agent, but plane flames in opposing direction needs high-accuracy burner alignment system and the gas transport system of high stable, It is difficult to apply to common lab；In the method, combustible gas and compressed air consumption are big, and cost is high.Reduced scale cun or full size modular Intend test and be difficult to provide accurate quantitative data, and experimentation cost is big, is not suitable for the screening of extinguishing chemical.

Summary of the invention

It is an object of the invention to provide a kind of fine mist fire-fighting efficiency assessment experimental provision Han additive, for the efficient thin water of screening Mist additive and research physics and chemism containing additive water mists with flame interaction provide condition guarantee.The employing present invention can Realize different additive composition and concentration, different water mists burst size and particle diameter distribution, different combustible gas components and flow, The quantitatively characterizing tested containing additive fine mist fire-fighting under different air mass flows, filters out efficient water mists additive, can be used for Research water smoke and the physics of flame interaction and chemism are it can also be used to research contains the heat and mass machine of the single water droplet of additive Reason.

The present invention is adopted the technical scheme that for achieving the above object: a kind of reality containing additive fine mist fire-fighting efficiency assessment Experiment device, including oxidant stream weight feed and transport system, fuel gas weight feed and transport system, characterizes system, number According to gathering and computer remote control system four part, oxidant stream weight feed and transport system include frequency conversion whirlpool blower fan, whirlpool Street effusion meter, small-sized wind tunnel, atomising device, sprayer support, fuel gas weight feed and transport system include column-shaped porous Burner, automatic gas distribution system, sign system includes water mists and flame interaction finder, flame temperature metering device and coagulates Rephasing grain diameter, velocity measuring device, described frequency conversion whirlpool blower fan is connected by the entrance straight tube of corrugated tube with vortex-shedding meter Connecing, the outlet straight tube of vortex-shedding meter is connected with the entrance of small-sized wind tunnel by corrugated tube, described small-sized wind tunnel include changeover portion, Bend loss, diffuser, damping section, condensed phase introduce section, stationary stream section and contraction section, and they use Flange joint the most successively, In changeover portion and bend loss junction, bend loss be equipped with honeycomb with diffuser junction, the damping full section of section be provided with honeycomb and It introduces with diffuser, condensed phase and has clamped damping screen at the flange connection surface of section, and condensed phase introduces a pair side upper shed of section and uses In installing aerosol apparatus bracing frame, bracing frame being equidistantly provided with three aerosol apparatus and fixes buckle, aerosol apparatus is the most quartzy two phase flow mist Changing device, air intlet and liquid-inlet are connected by flexible pipe and spinner flowmeter and syringe pump respectively, stationary stream section and water mists and fire Connect with moving axle Vickers contraction section between flame Functional observation device, condensed phase introduce section and stationary stream section material be PMMA for Observing nebulizer situation, contraction section material is rustless steel, and outer surface posts heated at constant temperature sheet, described water mists and flame Functional observation device and contraction section Flange joint, finder ring flange is provided with screwed hole for fixed burner fixed support With lifter firm banking, four hollow out sides of finder are provided with groove for clamping optical quartz glass sheet, solid at burner Having circular hole on the quartz glass plate of fixed rack side for installing column multi-orifice burner, column-shaped porous burner is by push-in Interface is connected with automatic gas distribution system, the post that the thermocouple wire butt welding point of described flame temperature metering device is placed in observation window Immediately below shape multi-orifice burner, it is connected with vertical displacement lifter by cantilever, described condensed phase grain diameter, tachometric survey Device is made up of isochronous controller, camera, LASER Light Source, camera lens and the line of LASER Light Source central point and described column The axis parallel of multi-orifice burner and be positioned at immediately below it, described data acquisition and computer remote control system and frequency conversion whirlpool Whirlpool blower fan, vortex-shedding meter, syringe pump, automatic gas distribution system, flame temperature metering device, condensed phase grain diameter, speed Measurement apparatus is connected.

Wherein, described column-shaped porous burner includes porous burner head, inorganic ceramic thin layer, burner base, wherein porous Combustion head half external cylindrical surface is coated with smooth high temperature resistant inorganic thin layers of ceramic, and porous burner head is with burner base by screw thread even Connect, burner base is provided with two screwed holes, be respectively mounted fast slotting straight coupling and screw-fixing type thermocouple.

Wherein, described atomising device includes quartz glass concentric atomizer, high-accuracy syringe pump, glass rotameter, stone English glass concentric atomizer is fixed on sprayer support, and feed tube and air inlet pipe are each passed through the through hole on sprayer support terminal It is connected with syringe pump and glass rotameter.

Wherein, sprayer support includes a cylindrical support frame with three buckles and the hermetic terminal of two side annular knurls, There is external screw thread at bracing frame two ends for being connected with two hermetic terminals, and hermetic terminal is provided with fits mutually with water inlet pipe and air inlet pipe caliber The through hole answered.

Wherein, flame temperature metering device includes that lifter fixes seat, lifter, and connecting rod fixes seat, cantilever, earthenware, The naked silk of R type butt welding thermocouple, lifter fixes seat associated jaw portion and is anchored on the ring flange of finder and contraction section, lifter Being fixed on lifting platform and fix on seat, connecting rod fixes the slide block of seat connecting cantilever and lifter, and there are through hole, earthenware in cantilever one end Inserting through hole to be fixed on cantilever, the naked silk of butt welding thermocouple passes earthenware, is connected to data collecting system by compensating wire.

Experimental technique containing additive fine mist fire-fighting efficiency assessment experimental provision of the present invention comprises the following steps:

(1) extract the aqueous solution containing additive of certain volume with the syringe of known caliber and be fixed on syringe pump, arranging Good syringe sampling volume flow；Open frequency conversion whirlpool blower fan and vortex-shedding meter, adjust air mass flow every little to 5～8 cubic metres Time；Open the heated at constant temperature sheet attached on contraction section, contraction section is heated to preset temperature；Start condensed phase grain diameter, speed The degree isochronous controller of measurement apparatus, camera and LASER Light Source；

(2) open automatic gas distribution system, set combustible gas component and mass flow；Open combustible gas source, by lighter It is placed in directly over column-shaped porous burner and lights a fire, form stable parcel flame；Now R type thermocouple is entered by lifting controllable device Row location, measures Stagnant flame face and the temperature of upper and lower various location；

(3) opening the air relief valve of aerosol apparatus air source, air source enters aerosol apparatus, regulation by needle valve and spinner flowmeter Needle valve knob, adjusts air to preset flow；Starting syringe pump, liquid introduces section and quiet at condensed phase after nebulizer Stream section mixes with air, forms speed in water mists and flame interaction viewing section porch substantially uniform after contraction section accelerates Oxidant stream；Now may utilize condensed phase grain diameter measurement apparatus measure various location immediately below columnar burner particle diameter and VELOCITY DISTRIBUTION；

(4) incoming frequency being gradually increased whirlpool blower fan improves whirlpool fan outlet volume flow, and corresponding different wind speed can profit Respectively flame temperature and granule phase particle diameter are distributed by sign system and characterize；When flame is suddenlyd change to wake flow flame by wrapping up flame Time, corresponding air mass flow is under specific fuel gas, water mists flow and atomizing particle size distribution, additive types and concentration Eigenvalue；It is possible not only to filter out the most carefully by the value of feature air mass flow under control variate method contrast different affecting factors Water smoke additive, it is also possible to disclose containing the extinguishing mechanism adding water mists.

It is an advantage of the current invention that:

Experimental provision water mists of the present invention and flame interaction finder four side all use quartz glass, are conducive to using high-speed camera The equipment such as machine, schlieren system, PIV, thermal camera obtain water mists and the transient process of flame interaction, velocity field distribution, The information such as Temperature Distribution.When sprayer unit and syringe pump replace with solid or gas extinguishing agent sampling device, the present invention tests dress Put and can be used for studying solid and the mechanism of gas extinguishing agent fire extinguishing, screening efficient solid and gas extinguishing agent.When column is burnt When device replaces to the solid such as wire, PMMA post, experimental provision of the present invention can also be studied water mists and extinguish the machine of solid phase combustion Reason.Owing to the present invention can provide speed homogeneous, quantitative, variable air stream at viewing section, column burning therefore can be taken off Device also blocks the round mouth on windowpane, utilizes syringe pump produce single drop and be suspended in viewing section, uses thermal infrared imager to see Examine the variations in temperature on drop surface, thus study the heat and mass transfer process of single drop.

Compared with cup burner column type observation window, this experimental provision viewing section uses the quartz glass observation window being parallel to each other, Overcome the image distortion through cylinder quartz glass；Easily condense on wall and damping screen with cup burner liquid phase extinguishing chemical Comparing, in this experimental provision, condensed phase introduces section and stationary stream section cross-sectional area is big, and water smoke is difficult at wall after being driven by air-flow in the same direction Condensing, contraction section constant temperature processes the thermal boundary layer formed and prevents the loss on wall of the liquid phase extinguishing chemical the most further；With cup Formula burner extinguishing chemical increase agent concentration reaches the method for fire extinguishing critical point and compares, and this experimental provision uses and increases air velocity Method reach put out a fire critical point, overcome the shortcoming that extinguishing chemical consumption is big.Compared with plane flames in opposing direction burner, this reality Experiment device uses small-sized wind tunnel and column-shaped porous burner to provide uniform, stable oxidant and combustible gas to liquidate air-flow respectively, keeps away Exempt to use high-accuracy position system and high stable gas delivery system；In this experimental provision, air source is carried by frequency conversion whirlpool blower fan Confession, overcomes the shortcoming that plane flames in opposing direction burner compressed air consumption is big.Compared with reduced scale cun or full scale tests, The experimentation cost of this experimental provision is low, and overcomes liquid phase extinguishing chemical accurate quantification difficulty, the particle diameter uncontrollable shortcoming of distribution.

Accompanying drawing explanation

Fig. 1 is this experimental provision structural representation；

Fig. 2 is column-shaped porous burner structure schematic diagram；

Fig. 3 is atomising device and sprayer support structural representation；

Fig. 4 is flame temperature metering device structural representation；

Fig. 5 is automatic gas distribution system structural representation.

Detailed description of the invention

Below in conjunction with accompanying drawing, the invention will be further described.

With reference to Fig. 1, the experimental provision containing additive fine mist fire-fighting efficiency assessment includes oxidant stream weight feed and with transporting is System, fuel gas weight feed and transport system, characterize system, data acquisition and computer remote control system four part, oxygen Agent stream weight feed and transport system include frequency conversion whirlpool blower fan 1, vortex-shedding meter 2, small-sized wind tunnel 3, atomising device 4, Sprayer support 5, fuel gas weight feed and transport system include column-shaped porous burner 6, automatic gas distribution system 7, characterize System includes water mists and flame interaction finder 8, flame temperature metering device 9 and condensed phase grain diameter measurement apparatus 10, Frequency conversion whirlpool blower fan 1 is connected with 0.3 meter of import straight tube of vortex-shedding meter 2 by one-inch corrugated tube, and vortex-shedding meter 2 uses The ring flange access conduit of DN25, coupled outlet conduit uses 1 cun of corrugated tube to be connected with wind-tunnel entrance, small-sized wind tunnel 3 include changeover portion 3-1, bend loss 3-2, diffuser 3-3, damping section 3-4, condensed phase introduce section 3-5, stationary stream section 3-6 and Contraction section 3-7, wherein changeover portion 3-1 inlet diameter 25 millimeters, outlet diameter 125 millimeters, length 600 millimeters, 90 degree of bend pipes Section 3-2 cross-sectional diameter is 125 millimeters, expands and calculates the section 3-3 side of being turn circle reducing joint, its round mouth diameter 125 millimeters, square opening The length of side 250 millimeters, high 150 millimeters, damping section 3-4, condensed phase introduce section 3-5, stationary stream section 3-6 cross section is the length of side 250 The square of millimeter, high respectively 80 millimeters, 330 millimeters and 120 millimeters, contraction section 3-7 shrinkage curve uses and moves axle Vickers Curve, entrance cross-section is the square of the length of side 250 millimeters, and exit cross-section is that the length of side is respectively 40 millimeters and 120 millimeters Rectangle, above each section is sequentially connected with, at changeover portion 3-1 and bend loss 3-2 junction, bend loss from bottom to top by flange 3-2 and diffuser 3-3 junction are equipped with honeycomb, and the damping full section of section 3-4 is provided with honeycomb and itself and diffuser 3-3, cohesion Introducing mutually and clamp 8 mesh and the damping screen of 12 mesh respectively at the flange connection surface of section 3-5, air enters condensed phase and introduces section 3-5 Rear turbulivity reduces, and condensed phase introduces the round mouth having diameter 25 millimeters on a pair side of section 3-5 and supports for installing aerosol apparatus Frame 5, bracing frame 5 is equidistantly provided with three aerosol apparatus and fixes buckle, and aerosol apparatus 4-1 is the most quartzy two phase flow nebulizer, by The water smoke that aerosol apparatus 4-1 produces mixes with the air stream of co-flow, water smoke and the speed difference base of air after stationary stream section 3-6 This disappearance, is connected with contraction section 3-7 between stationary stream section 3-6 and water mists with flame interaction finder 8, and connected mode is method Blue connection, water smoke goes out, at contraction section, the velocity field that interruption-forming is substantially uniform after oxidant circulation supercontraction section 3-7 of air composition, Contraction section 3-7 material is rustless steel, and outer surface posts heated at constant temperature sheet, for forming thermal boundary layer to reduce drop on surface Coalescence, water mists and flame interaction finder 8 material are blackout aluminum, and four hollow out sides are provided with groove for clamping long 235.6 Millimeter, thick 4.8 millimeters, the wide optical quartz glass sheet 8-2 being respectively 105.6 millimeters and 25.6 millimeters, four sides are surrounded Cavity cross-sectional area be long 120 millimeters, the rectangle of wide 40 millimeters, the side quartz glass of a width of 105.6 millimeters has The circular hole of a diameter of 31 millimeters is used for installing column multi-orifice burner 6, and finder 8 ring flange is provided with M5*0.8 screwed hole It is respectively used to fixing aluminum burner fixed support 8-1 and flame temperature metering device 9, condensed phase grain diameter, tachometric survey Device 10 is made up of isochronous controller, camera, LASER Light Source, camera lens and the line of LASER Light Source central point and described The axis parallel of column-shaped porous burner 6 and be positioned at immediately below it, utilizes the principle of shadowing method can measure stagnation point and the most not The distribution of grain diameter and velocity field at co-located, data acquisition and computer remote control system 11 and frequency conversion whirlpool blower fan (1), Vortex-shedding meter 2, syringe pump 4-2, automatic gas distribution system 7, flame temperature metering device 9, condensed phase grain diameter, speed Measurement apparatus 10 is connected.

With reference to Fig. 2, column-shaped porous burner 6 includes that rustless steel porous burner head 6-1, inorganic ceramic thin layer 6-2, rustless steel fire Burner base 6-3, wherein a diameter of 30 millimeters of porous burner head 6-1, end has the convex of high 1 millimeter, porous burner head 6-1 The porous web that minimum-value aperture is 30 μm being made up of multiple layer metal braiding silk screen that middle part is wide 20 millimeters, its upper half outside cylinder Topcoating is covered with smooth refractory ceramics thin layer 6-2, porous burner head 6-1 and the burner base 6-3 screw thread by M24*1 Connect, burner base be provided with the screwed hole of two M5*0.8, M8*1.25, be respectively used to install fast insert straight coupling and Screw-fixing type thermocouple, fast inserting connects with four fluorine tube between straight coupling and the outlet of automatic gas distribution system 7 hybrid chamber, and screw thread is solid Fixed pattern K-type thermocouple is connected with data collecting system, and fuel gas forms a constant static-pressure in porous burner head cavity body 6-1, logical Crossing porous combustion head 6-1 lower half circle cylinder to flow out equably, in combustion head, the temperature of fuel gas is surveyed by fixed K-type thermocouple ?.

With reference to Fig. 3, atomising device 4 includes quartz glass concentric atomizer 4-1, high-accuracy syringe pump 4-2, glass rotors flow Meter 4-3, needle valve 4-4, sprayer support 5 includes a cylindrical support frame 5-1 with the diameter 15 millimeters of three buckles With the hermetic terminal 5-2 of two side annular knurls, bracing frame 5-1 two ends have M11*1.5 external screw thread for two hermetic terminal 5-2 Connecting, hermetic terminal 5-2 is provided with the through hole of two diameters 5 millimeters, and quartz glass concentric atomizer 4-1 is fixed on aerosol apparatus On support 5-1, air inlet pipe and feed tube are turned with syringe pump 4-2 and glass by the through hole on sprayer support terminal 5-2 respectively Subflow gauge 4-3 connects, and atomization air flow can be controlled by needle valve 4-4.

With reference to Fig. 4, flame temperature metering device 9 includes that lifter fixes seat 9-1, lifter 9-2, connecting rod fix seat 9-3, Cantilever 9-4, earthenware 9-5, R type butt welding thermocouple naked silk 9-6, lifter fixes seat 9-1 associated jaw portion by two M5*0.8 Star-like handle be anchored on finder 8 with on the ring flange of contraction section 3-7, lifter 9-2 is solid by 4 M6*1 screws Fixing on seat 9-1 due to lifter, connecting rod is fixed seat 9-3 and is fixed on the cunning of lifter 9-2 by the screw of 4 M5*0.8 On block, and 3 M3*0.5 screws are utilized to fix one end of cantilever diameter 10 millimeters, inverted U-shaped cantilever 9-4 other end diameter 2 millimeters, its bottom is provided with 1.2 millimeters of through holes of diameter, and 1 millimeter of diplopore alundum tube 9-5 of diameter inserts through hole and is fixed on cantilever On, 50 μm butt welding thermocouple naked silk 9-6 passes alundum tube 9-5, is connected to data collecting system, lifter by compensating wire 9-2 can be by computer control, and minimum precision 0.01 millimeter can be to the flame temperature of diverse location by controlling lifter slide block Measure.

With reference to Fig. 5, automatic gas distribution system 7 is controlled by computer, mainly by gas bomb, in high precision mass flowmenter, premix Chamber, control circuit etc. form, and experimental gas gas cylinder is connected with 3 mass flowmenters, by the gas of effusion meter respectively by valve Body is pooled to premix in cavity and uniformly mixes.The concentration of initial premixed gas is unstable, can be by closing main pipeline valve, opening By-pass line valve discharge line, when automatic gas distribution system 7 shows that combustible gas concentration is stablized, closes bypath valve and opens supervisor Road valve.

Non-elaborated part of the present invention belongs to the known technology of those skilled in the art.

Claims (6)

1. the experimental provision containing additive fine mist fire-fighting efficiency assessment, it is characterised in that: include that oxidant stream is quantitative Supply and transport system, fuel gas weight feed and transport system, characterize system, data acquisition and computer long-distance control system Uniting four parts, oxidant stream weight feed and transport system include frequency conversion whirlpool blower fan (1), vortex-shedding meter (2), Miniature wind Hole (3), atomising device (4), sprayer support (5), fuel gas weight feed and transport system include that column-shaped porous burns Device (6), automatic gas distribution system (7), sign system includes water mists and flame interaction finder (8), flame temperature measurement Device (9) and condensed phase grain diameter, velocity measuring device (10), corrugated tube is passed through in described frequency conversion whirlpool blower fan (1) Being connected with the entrance straight tube of vortex-shedding meter (2), the outlet straight tube of vortex-shedding meter (2) is by corrugated tube and small-sized wind tunnel (3) Entrance connect, described small-sized wind tunnel (3) include changeover portion (3-1), bend loss (3-2), diffuser (3-3), damping Section (3-4), condensed phase introduce section (3-5), stationary stream section (3-6) and move axle Vickers contraction section (3-7), and they depend on from bottom to up Secondary Flange joint, at changeover portion (3-1) and bend loss (3-2) junction, bend loss (3-2) and diffuser (3-3) Junction is equipped with honeycomb, and the full section of damping section (3-4) is provided with honeycomb and it introduces section (3-5) with diffuser (3-3), condensed phase Flange connection surface at clamped damping screen, condensed phase introduces section (3-5) a pair side upper shed and is used for installing sprayer support (5), sprayer support (5) being equidistantly provided with three aerosol apparatus and fixes buckle, aerosol apparatus (4-1) is the most quartzy two phase flow Nebulizer, air intlet and liquid-inlet are connected by flexible pipe and spinner flowmeter (4-3) and syringe pump (4-2) respectively, quiet It is connected with shifting axle Vickers contraction section (3-7) between stream section (3-6) and water mists with flame interaction finder (8), condensed phase Introduce section (3-5) and stationary stream section (3-6) material is that PMMA is for observation nebulizer situation, shifting axle Vickers contraction section (3-7) material is rustless steel, and outer surface posts heated at constant temperature sheet, described water mists and flame interaction finder (8) with Moving axle Vickers contraction section (3-7) Flange joint, it is solid for fixed burner that finder (8) ring flange is provided with screwed hole Fixed rack (8-1) and lifter firm banking (9-1), (8) four hollow out sides of finder are provided with groove for clamping light Learn quartz glass plate (8-2), the quartz glass plate (8-2) of burner fixed support (8-1) side has circular hole for Installing column multi-orifice burner (6), column-shaped porous burner (6) is connected with automatic gas distribution system (7) by inserting type interface Connect, the column-shaped porous burner that the thermocouple wire butt welding point of described flame temperature metering device (9) is placed in observation window just under Side, the thermocouple wire butt welding point of described flame temperature metering device (9) is connected with vertical displacement lifter by cantilever, institute Condensed phase grain diameter, the velocity measuring device (10) stated are made up of isochronous controller, camera, LASER Light Source, camera lens With the line of LASER Light Source central point and the axis parallel of described column-shaped porous burner and be positioned at immediately below it, described number According to gathering and computer remote control system and frequency conversion whirlpool blower fan (1), vortex-shedding meter (2), syringe pump (4-2), automatically Air distribution system (7), flame temperature metering device (9), condensed phase grain diameter, velocity measuring device (10) are connected.

A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment the most according to claim 1, its feature exists In: described column-shaped porous burner (6) includes porous burner head (6-1), inorganic ceramic thin layer (6-2), burner base (6-3), wherein half external cylindrical surface of porous burner head (6-1) is coated with smooth high temperature resistant inorganic thin layers of ceramic (6-2), Porous burner head (6-1) is threaded connection with burner base (6-3), is provided with two screwed holes in burner base, It is respectively mounted fast slotting straight coupling and screw-fixing type thermocouple.

A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment the most according to claim 1, its feature exists In: described atomising device (4) includes quartz glass concentric atomizer (4-1), syringe pump (4-2), glass rotameter (4-3), described syringe pump (4-2) is high-accuracy syringe pump, and quartz glass concentric atomizer (4-1) is fixed on aerosol apparatus and props up On frame (5), the through hole that feed tube and air inlet pipe are each passed through on two hermetic terminals (5-2) of sprayer support (5) with Syringe pump (4-2) and glass rotameter (4-3) connect.

A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment the most according to claim 1, its feature exists In: sprayer support (5) includes a cylindrical support frame (5-1) with three buckles and the sealing of two side annular knurls Terminal (5-2), there is external screw thread at bracing frame (5-1) two ends for being connected with two hermetic terminals (5-2), hermetic terminal (5-2) It is provided with the through hole adapted with water inlet pipe and air inlet pipe caliber.

A kind of experimental provision containing additive fine mist fire-fighting efficiency assessment the most according to claim 1, its feature exists In: flame temperature metering device (9) includes lifter firm banking (9-1), lifter (9-2), connecting rod fix seat (9-3), Cantilever (9-4), earthenware (9-5), the naked silk of R type butt welding thermocouple (9-6), lifter firm banking (9-1) nip part Dividing on the ring flange being anchored on finder (8) and contraction section (3-7), lifter (9-2) is fixed on lifter firm banking (9-1), on, connecting rod fixes seat (9-3) connecting cantilever (9-4) and the slide block of lifter (9-2), cantilever (9-4) End has through hole, and earthenware (9-5) inserts through hole and is fixed on cantilever, and the naked silk of R type butt welding thermocouple (9-6) passes earthenware (9-5), it is connected to data collecting system by compensating wire.

6. the experimental technique containing additive fine mist fire-fighting efficiency assessment experimental provision described in claim 1, it is special Levy and be: comprise the following steps:

(1) extract the aqueous solution containing additive of certain volume with the syringe of known caliber and be fixed on syringe pump, arranging Good syringe sampling volume flow；Open frequency conversion whirlpool blower fan and vortex-shedding meter, adjust air mass flow every little to 5～8 cubic metres Time；Open the heated at constant temperature sheet attached on contraction section, contraction section is heated to preset temperature；Start condensed phase grain diameter, speed The degree isochronous controller of measurement apparatus, camera and LASER Light Source；

(2) open automatic gas distribution system, set combustible gas component and mass flow；Open combustible gas source, by lighter It is placed in directly over column-shaped porous burner and lights a fire, form stable parcel flame；Now R type thermocouple is entered by lifting controllable device Row location, measures Stagnant flame face and the temperature of upper and lower various location；

(3) opening the air relief valve of aerosol apparatus air source, air source enters aerosol apparatus, regulation by needle valve and spinner flowmeter Needle valve knob, adjusts air to preset flow；Starting syringe pump, liquid introduces section and quiet at condensed phase after nebulizer Stream section mixes with air, forms speed in water mists and flame interaction viewing section porch substantially uniform after contraction section accelerates Oxidant stream；Now may utilize condensed phase grain diameter, various location immediately below columnar burner measured by velocity measuring device Particle diameter and VELOCITY DISTRIBUTION；

(4) incoming frequency being gradually increased whirlpool blower fan improves whirlpool fan outlet volume flow, and corresponding different wind speed can profit Respectively flame temperature and granule phase particle diameter are distributed by sign system and characterize；When flame is suddenlyd change to wake flow flame by wrapping up flame Time, corresponding air mass flow is under specific fuel gas, water mists flow and atomizing particle size distribution, additive types and concentration Eigenvalue；It is possible not only to filter out the most carefully by the value of feature air mass flow under control variate method contrast different affecting factors Water smoke additive, it is also possible to disclose containing the extinguishing mechanism adding water mists.