CN105258116B - Suitable for the taper flame burner and its method of Study of Liquid fuel combustion characteristics - Google Patents

Suitable for the taper flame burner and its method of Study of Liquid fuel combustion characteristics Download PDF

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Publication number
CN105258116B
CN105258116B CN201510669562.XA CN201510669562A CN105258116B CN 105258116 B CN105258116 B CN 105258116B CN 201510669562 A CN201510669562 A CN 201510669562A CN 105258116 B CN105258116 B CN 105258116B
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China
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air
liquid fuel
burner
fuel
section
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CN201510669562.XA
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CN105258116A (en
Inventor
许沧粟
胡洋洋
麻剑
谢阳
罗麒元
王洪涛
刘阳训
周旋
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Zhejiang University ZJU
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Zhejiang University ZJU
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D11/00Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D11/00Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36Details, e.g. burner cooling means, noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2208/00Control devices associated with burners

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Spray-Type Burners (AREA)

Abstract

The invention discloses a kind of taper flame burner and its method suitable for Study of Liquid fuel combustion characteristics.It includes burner, temperature indicator, heater controller, first flow controller and display instrument, the first pressure-reducing valve, compressed air reservoir, accurate oil mass pump, fuel tank, protective gas air accumulator, the second pressure-reducing valve, second flow controller and display instrument, and burner includes that taper flame forms section, steady flow segment, liquid fuel atomization section, air bringing-up section, burner outlet, protective gas kuppe, porous ceramics flow straightener, insulation material, temperature sensor, air contact formula electric heater, liquid fuel atomization room.Liquid fuel taper flame burner of the invention, the natural air of taper flame periphery can be completely cut off, the stable flame not influenceed by outside air is formed, by the regulation to air capacity and fuel quantity and air heating-up temperature, liquid fuel combustion characteristic is studied.

Description

Suitable for the taper flame burner and its method of Study of Liquid fuel combustion characteristics
Technical field
The present invention relates to a kind of taper flame burner and its method suitable for Study of Liquid fuel combustion characteristics.
Background technology
The method of tradition research laminar flame combustion characteristics has a stagnation face method, constant volume bullet method and plane flame method etc., wherein Stagnation face method is difficult to determine the shape of flame front, and very big difficulty is brought to calculating flame stretching rate, and in high reynolds number feelings It can be limited under condition to measure flame speed;Constant volume bullet method complex structure, and experiment is only completed in moment every time, it is impossible to provide One flame for being persistently available for observation;Flat flame method Flame heat losses are larger, influence laminar flame speed, Different Plane Measurement error between flame burner is larger.These methods have respective defect, otherwise it is complicated, or exist influence because Element is more, and error is larger, it is impossible to provides a continual and steady reliable flame and is studied, regarding to the issue above, the present invention is proposed A kind of of a tightly knit structure, controlled variable is more, can be prevented effectively from flame by natural air influenceed suitable for Study of Liquid fuel combustion The taper flame burner of characteristic.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided one kind is applied to Study of Liquid fuel laminar flame speed The taper flame burner and its method of degree, intermediate product, Soot Formation mechanism and living radical.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is as follows:
Taper flame burner suitable for Study of Liquid fuel combustion characteristics includes burner, temperature indicator, heating Device controller, first flow controller and display instrument, the first pressure-reducing valve, compressed air reservoir, accurate oil mass pump, fuel Case, protective gas air accumulator, the second pressure-reducing valve, second flow controller and display instrument, burner are formed including taper flame Section, steady flow segment, liquid fuel atomization section, air bringing-up section, burner outlet, protective gas kuppe, porous ceramics flow straightener, Insulation material, temperature sensor, air contact formula electric heater, liquid fuel atomization room;
Burner is sequentially provided with taper flame and forms section, steady flow segment, liquid fuel atomization section, air heating from top to bottom Section, burner top is that taper flame formation section is provided with burner outlet, and burner outlet periphery is provided with protective gas kuppe, Protective gas kuppe is connected through second flow controller and display instrument, the second pressure-reducing valve with protective gas air accumulator, burning Device middle part is provided with porous ceramics flow straightener, and burner bottom is provided with air contact formula electric heater i.e. air bringing-up section, and air connects Touch electric heater is connected with heating controller, and air contact formula electric heater upper end is provided with temperature sensor, temperature sensor It is connected with temperature indicator, compressed air reservoir connects through the first pressure-reducing valve, first flow controller and display instrument and air Touch electric heater bottom is connected, and liquid fuel atomization room is provided between porous ceramics flow straightener and air contact formula electric heater That is liquid fuel atomization section, fuel tank is connected through accurate oil mass pump with liquid fuel atomization room, liquid fuel atomization section and taper Flame is steady flow segment between forming section, and burner outer wall is provided with insulation material.
Described liquid fuel atomization section is from bottom to top tapered divergent structure, and fuel feed mouthful is provided with throat's circumference.
It is uniformly distributed on described throat's circumference and is provided with multiple fuel feeds mouthful, and aperture is different.
Four gas atmosphere inlets are uniform-distribution with described protective gas kuppe circumference.
Method for controlling combustion suitable for the taper flame burner of Study of Liquid fuel combustion characteristics is:During work, first Air is passed through, and opens air contact formula electric heater, by the Signal Regulation heating power of temperature sensor feedback, when preheating is empty Temperature degree reach liquid fuel to be studied required for temperature when, protective gas air accumulator starts to supply protective gas, and starts Liquid fuel to be studied is passed through from fuel tank, the fuel quantity being passed through can be by accurate measurement pump precise control, then according to being surveyed The physicochemical property of the different liquids fuel of examination is viscosity, surface tension, molecular weight, density, selects different liquid fuel atomizations Room throat fuel feed mouthful passage, due to the tapered divergent structure of liquid fuel atomization room, fuel from throat be passed through when, due to sky The throttling action of gas, and preheated air provides temperature environment higher and promotes liquid fuel evaporation, promotes liquid fuel-preheating Air mixes, and premixed gas forms homogeneous laminar flow gaseous mixture by porous ceramics flow straightener, is then lighted in burner outlet, shape Into a continual and steady taper flame, and then combustion characteristics to institute's test liquid fuel is studied, and this burner passes through Change the heating power of contact electric heater in air, the oil mass that the accurate oil mass pump of control passes through and first flow controller And the air supply that passes through of display instrument studies different fuel i.e. gasoline, the bavin of different preheating temperatures, different air-fuel ratios Oil, biodiesel, the combustion characteristics of Aalcohols fuel are that laminar flame speed, intermediate product, Soot Formation mechanism and activity are free Base;By the selection of liquid fuel atomization section fuel feed mouthful, make tested different fuel i.e. gasoline, diesel oil, biodiesel, Aalcohols fuel is attained by optimized nebulization effect, and the selection of fuel feed mouthful is determined by the physicochemical property of tested fuel, Taper flame burner utilizes pre-add hot-air, and liquid fuel atomization section throat throttling action smashes liquid fuel, and by many Hole ceramics flow straightener forms an air and fuel mixture for uniform laminar flow, protects flame not by extraneous empty by protective gas The influence of gas, so as to generate a continual and steady flame, carries out experimental study.
Taper flame burner suitable for Study of Liquid fuel combustion characteristics of the invention is logical by different fuel entrance The selection in road is vapour according to institute's Study of Liquid fuel by the regulation to air capacity and fuel quantity and air preheating temperature Oil, diesel oil, biodiesel, the physicochemical property of Aalcohols fuel are that viscosity, surface tension, molecular weight, density select corresponding liquid Fluid fuel supply port, so as to realize the variable of different liquids fuel combustion characteristics(That is equivalent proportion, initial temperature)Control research, profit The protective layer provided with protective gas completely cuts off the natural air of taper flame periphery, forms one not by holding that outside air is influenceed Continuous stabilization flame.
Brief description of the drawings
Fig. 1 is the taper flame burner structural representation suitable for Study of Liquid fuel combustion characteristics;
Fig. 2 is burner structure schematic diagram of the invention;
Fig. 3 is protective gas kuppe sectional view of the invention;
Fig. 4 is liquid fuel atomization of the invention section throat section figure;
In figure:Burner taper flame forms section 1, steady flow segment 2, liquid fuel atomization section 3, air bringing-up section 4, temperature and shows Show device 5, heater controller 6, first flow controller and display instrument 7, the first pressure-reducing valve 8, compressed air reservoir 9, essence Close oil mass pump 10, fuel tank 11, protective gas air accumulator 12, the second pressure-reducing valve 13, second flow controller and display instrument 14, Burner outlet 15, protective gas kuppe 16, porous ceramics flow straightener 17, insulation material 18, temperature sensor 19, air connect Touch electric heater 20, liquid fuel atomization room 21.
Specific embodiment
Below in conjunction with the accompanying drawings with specific embodiment to it is of the invention suitable for Study of Liquid fuel laminar flame speed and The taper flame burner of intermediate product is described in further detail.
As shown in Figure 1, 2, it is adaptable to which the taper flame burner of Study of Liquid fuel combustion characteristics includes burner, temperature Display 5, heater controller 6, first flow controller and display instrument 7, the first pressure-reducing valve 8, compressed air reservoir 9, Accurate oil mass pump 10, fuel tank 11, protective gas air accumulator 12, the second pressure-reducing valve 13, second flow controller and display instrument 14, burner includes that taper flame forms section 1, steady flow segment 2, liquid fuel atomization section 3, air bringing-up section 4, burner outlet 15th, protective gas kuppe 16, porous ceramics flow straightener 17, insulation material 18, temperature sensor 19, air contact formula electrical heating Device 20, liquid fuel atomization room 21;
Burner is sequentially provided with taper flame formation section 1, steady flow segment 2, liquid fuel atomization section 3, air and adds from top to bottom Hot arc 4, burner top is that taper flame formation section 1 is provided with burner outlet 15, and burner outlet periphery is provided with protective gas Kuppe 16, protective gas kuppe is stored up through second flow controller and display instrument 14, the second pressure-reducing valve 13 with protective gas Gas tank 12 is connected, and burner middle part is provided with porous ceramics flow straightener 17, and burner bottom is provided with air contact formula electric heater 20 That is air bringing-up section 4, air contact formula electric heater is connected with heating controller 6, and the upper end of air contact formula electric heater 20 sets There is temperature sensor 19, temperature sensor is connected with temperature indicator 5, compressed air reservoir 9 is through the first pressure-reducing valve 8, first Flow controller and display instrument 7 are connected with air contact formula electric heater bottom, porous ceramics flow straightener and air contact formula Liquid fuel atomization room 21 i.e. liquid fuel atomization section 3 is provided between electric heater, fuel tank 11 is through accurate oil mass pump 10 and liquid Fluid fuel spray chamber 21 is connected, and is steady flow segment 2 between liquid fuel atomization section 3 and taper flame formation section 1, and burner outer wall sets There is insulation material 18.
Described liquid fuel atomization section 3 is from bottom to top tapered divergent structure, and fuel feed mouthful is provided with throat's circumference.
It is uniformly distributed on described throat's circumference and is provided with multiple fuel feeds mouthful, and aperture is different, to adapt to difference The physicochemical property of liquid fuel, reaches the atomizing effect for most reaching, as shown in Figure 4.
Four gas atmosphere inlets are uniform-distribution with the described circumference of protective gas kuppe 16, to ensure in burning fire Flame periphery provides a uniform protective layer, as shown in Figure 3.
Method for controlling combustion suitable for the taper flame burner of Study of Liquid fuel combustion characteristics is:During work, first Air is passed through, and opens air contact formula electric heater 20, the Signal Regulation heating power fed back by temperature sensor 19, when pre- Hot air temperature reach liquid fuel to be studied required for temperature when, protective gas air accumulator 12 start supply protective gas, And beginning is passed through liquid fuel to be studied from fuel tank 11, the fuel quantity being passed through can be by the precise control of accurate measurement pump 10, so Afterwards according to different liquids fuel i.e. gasoline, diesel oil, biodiesel, the physicochemical property i.e. viscosity of Aalcohols fuel, the surface tested Tension force, molecular weight, density, select the different throat's fuel feed mouthful passages of liquid fuel atomization room 21, due to liquid fuel mist Change the tapered divergent structure of room 21, fuel from throat be passed through when, due to the throttling action of air, and preheated air provides higher Temperature environment accelerate liquid fuel evaporation, promote the mixing of liquid fuel-preheated air, premixed gas passes through porous ceramics current stabilization Device 17 forms homogeneous laminar flow gaseous mixture, is then lighted in burner outlet 15, forms a continual and steady taper flame, and then Combustion characteristics to institute's test liquid fuel is studied, this burner by change contact electric heater 20 in air plus The compressed air that the oil mass and first flow controller and display instrument 7 that thermal power, the accurate oil mass pump 10 of control pass through pass through Measure study different preheating temperatures, the combustion characteristics i.e. laminar flame speed of the different fuel of different air-fuel ratio, intermediate product, Soot Formation mechanism and living radical;By the selection of liquid fuel atomization section 3 fuel feeds mouthful, make the different liquid tested Fluid fuel is that gasoline, diesel oil, biodiesel, Aalcohols fuel are attained by optimized nebulization effect, the selection of fuel feed mouthful be by What the physicochemical property of tested fuel was determined, taper flame burner utilizes pre-add hot-air, liquid fuel atomization section throat section Stream effect smashes liquid fuel, and forms an air and fuel mixture for uniform laminar flow by porous ceramics flow straightener, passes through Protective gas protects the flame not influenceed by outside air, so as to generate a continual and steady flame, carries out experimental study, can Control variable is more, and flame reproducibility is strong.
Different air-fuel ratios, the stable taper flame of different initial temperatures formed by this taper flame burner, can Using the spontaneous light characteristic of CH or OH free radicals, different optical filters are selected, shooting obtains taper flame profile image, further according to Mixed gas flow and resulting flame sectional area can calculate laminar flame speed;Can using different soot test equipments To measure Soot Formation amount, diameter, amounts of particles in combustion process, can further study in the carbon soot particles of capture not Same organic solute and soot structure;Using different laser Induced Fluorescence Technologies, the free radical of combustion process is measured, enter one Step analysis combustion mechanism, for Modeling Calculation burning velocity provides experimental verification.

Claims (5)

1. a kind of taper flame burner suitable for Study of Liquid fuel combustion characteristics, it is characterised in that including burner, temperature Degree display(5), heater controller(6), first flow controller and display instrument(7), the first pressure-reducing valve(8), compression it is empty Gas air accumulator(9), accurate oil mass pump(10), fuel tank(11), protective gas air accumulator(12), the second pressure-reducing valve(13), second Flow controller and display instrument(14), burner include taper flame formed section(1), steady flow segment(2), liquid fuel atomization section (3), air bringing-up section(4), burner outlet(15), protective gas kuppe(16), porous ceramics flow straightener(17), thermal insulating material Material(18), temperature sensor(19), air contact formula electric heater(20), liquid fuel atomization room(21);
Burner is sequentially provided with taper flame and forms section from top to bottom(1), steady flow segment(2), liquid fuel atomization section(3), air Bringing-up section(4), burner top is that taper flame forms section(1)It is provided with burner outlet(15), burner outlet periphery is provided with Protective gas kuppe(16), protective gas kuppe is through second flow controller and display instrument(14), the second pressure-reducing valve (13)With protective gas air accumulator(12)It is connected, burner middle part is provided with porous ceramics flow straightener(17), burner bottom is provided with Air contact formula electric heater(20)That is air bringing-up section(4), air contact formula electric heater and heating controller(6)It is connected, Air contact formula electric heater(20)Upper end is provided with temperature sensor(19), temperature sensor and temperature indicator(5)It is connected, pressure Contracting air storage tank(9)Through the first pressure-reducing valve(8), first flow controller and display instrument(7)With air contact formula electrical heating Device(20)Bottom is connected, porous ceramics flow straightener(17)With air contact formula electric heater(20)Between be provided with liquid fuel atomization Room(21)I.e. liquid fuel atomization section(3), fuel tank(11)Through accurate oil mass pump(10)It is connected with liquid fuel atomization room, liquid Fuel atomization section(3)Section is formed with taper flame(1)Between be steady flow segment(2), burner outer wall is provided with insulation material(18).
2. a kind of taper flame burner suitable for Study of Liquid fuel combustion characteristics as claimed in claim 1, its feature It is, described liquid fuel atomization section(3)It is from bottom to top tapered divergent structure, fuel feed mouthful is provided with throat's circumference.
3. a kind of taper flame burner suitable for Study of Liquid fuel combustion characteristics as claimed in claim 2, its feature It is to be uniformly distributed to be provided with multiple fuel feeds mouthful on described throat's circumference, and aperture is different.
4. a kind of taper flame burner suitable for Study of Liquid fuel combustion characteristics as claimed in claim 1, its feature It is described protective gas kuppe(16)Four gas atmosphere inlets are uniform-distribution with circumference.
5. a kind of combustion using the taper flame burner suitable for Study of Liquid fuel combustion characteristics as claimed in claim 1 Burn control method, it is characterised in that:During work, air is first passed through, and open air contact formula electric heater(20), passed by temperature Sensor(19)The Signal Regulation heating power of feedback, the temperature required for preheated air temperature reaches liquid fuel to be studied When, protective gas air accumulator(12)Start to supply protective gas, and start from fuel tank(11)It is passed through liquid fuel to be studied, institute The fuel quantity being passed through is by accurate measurement pump(10)Precise control, then according to the different liquids fuel i.e. gasoline, diesel oil tested, Biodiesel, the physicochemical property of Aalcohols fuel are viscosity, surface tension, molecular weight, density, select different liquid fuel atomizations Room(21)Throat's fuel feed mouthful passage, due to liquid fuel atomization room(21)Tapered divergent structure, fuel is passed through from throat When, because the throttling action of air, and preheated air provide temperature environment higher and accelerate liquid fuel evaporation, promote liquid Fuel-preheated air mixing, premixed gas passes through porous ceramics flow straightener(17)Homogeneous laminar flow gaseous mixture is formed, then in burning Device is exported(15)Light, form a continual and steady taper flame, and then combustion characteristics to institute's test liquid fuel is carried out Research, this burner is by changing contact electric heater in air(20)Heating power, control accurate oil mass pump(10)It is logical The oil mass and first flow controller and display instrument crossed(7)The air supply for passing through studies different preheating temperatures, no It is laminar flame speed, intermediate product, Soot Formation mechanism and living radical with the combustion characteristics of the different fuel of air-fuel ratio; By liquid fuel atomization section(3)The selection of fuel feed mouthful, make tested different fuel i.e. gasoline, diesel oil, biodiesel, Aalcohols fuel is attained by optimized nebulization effect, and the selection of fuel feed mouthful is determined by the physicochemical property of tested fuel, Taper flame burner utilizes pre-add hot-air, and liquid fuel atomization section throat throttling action smashes liquid fuel, promotes atomization, And an air and fuel mixture for uniform laminar flow is formed by porous ceramics flow straightener, flame is protected not by protective gas Influenceed by outside air, so as to generate a continual and steady flame, carried out experimental study.
CN201510669562.XA 2014-11-17 2015-10-13 Suitable for the taper flame burner and its method of Study of Liquid fuel combustion characteristics Expired - Fee Related CN105258116B (en)

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CN201410652024.5A CN104390215A (en) 2014-11-17 2014-11-17 Cone-shaped flame burner applicable for researching combustion characteristics of liquid fuel and method thereof
CN201510669562.XA CN105258116B (en) 2014-11-17 2015-10-13 Suitable for the taper flame burner and its method of Study of Liquid fuel combustion characteristics

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CN108731254B (en) * 2018-07-27 2023-12-29 云南玮昊能源发展有限公司 Coiled pipe fuel heater capable of automatically controlling fuel injection quantity and control method thereof
CN110345473B (en) * 2019-08-01 2024-05-28 中国科学技术大学 Fuel supply device for cup burner
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CN113533620B (en) * 2021-07-06 2023-09-05 中国科学院广州能源研究所 Device and method for measuring propagation speed of high-temperature laminar flame of self-adaptive liquid fuel
CN114893768B (en) * 2022-04-28 2023-03-14 上海交通大学 Liquid hydrocarbon fuel laminar flow flame combustion device based on tower-shaped structure mixing

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