CN108844063A - A kind of air/methane burner for high temperature pure air heat accumulating type heating equipment - Google Patents

A kind of air/methane burner for high temperature pure air heat accumulating type heating equipment Download PDF

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Publication number
CN108844063A
CN108844063A CN201810805967.5A CN201810805967A CN108844063A CN 108844063 A CN108844063 A CN 108844063A CN 201810805967 A CN201810805967 A CN 201810805967A CN 108844063 A CN108844063 A CN 108844063A
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methane
air
head
body portion
burner
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CN201810805967.5A
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CN108844063B (en
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王勇
杨伟东
李龙飞
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Xian Aerospace Propulsion Institute
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Xian Aerospace Propulsion Institute
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/66Preheating the combustion air or gas
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)

Abstract

A kind of air/methane burner for high temperature pure air heat accumulating type heating equipment, it is characterised in that including:Head and body portion;Head and body portion are fixed together, form air/methane burner overall structure, premix chamber is provided in head, it is combustion chamber inner cavity in body portion, air is entered the adjustable methane of the flow radially sprayed at premix chamber and premix chamber with cyclonic form and completes to blend formation premix gas in head, forms sudden expansion face recirculating zone on head and body portion junction, the igniting that air/methane premix gas is carried out at the sudden expansion face recirculating zone, provides preheating heat source for heat accumulating type heating equipment.Head of the invention devises pintle structure, by actuator driven, changes methane gas jets spray area, guarantees gas medium always with the mixing of best ratio of momentum, it is ensured that premix igniting and the efficient burning of gas.

Description

A kind of air/methane burner for high temperature pure air heat accumulating type heating equipment
Technical field
The present invention relates to air/methane burners, in particular to for high temperature pure air heat accumulating type heating equipment air/ Methyl hydride combustion device can be applied to the direct-connected testing stand of ultra-combustion ramjet and other need to provide the burner of a wide range of Variable power.
Background technique
Scramjet engine ground-testing plant mostly uses combustion heating or electric arc heated etc. to pollute heating method at present. There are the burning heater of the fuel such as hydrogen, methane, alcohol and kerosene, electric arc heated mode in the country.Studies have shown that using combustion heating Or electric arc heated mode scramjet engine ground experiment performance and pure air exist between experimental performance to flow down Many differences, mainly simulation incoming flow have H2O、CO2With the pollution components such as NOx, there are so-called " polluting effects ".Heat accumulating type adds The basic principle of the direct-connected wind-tunnel of the pure air of thermal technology is:Heat is generated with conventional heat sources (oxygen-enriched burner) and is stored In energy storage bed material, during subsequent test, thermal energy passes to high pressure air flow from heat-storing material to improve air themperature, It is supplied again to equipment jet pipe and is expanded to target Mach number.This can not only provide relatively pure air incoming flow, can truer mould Quasi- engine behavior, while being also of great significance to studying and assessing ground experiment " polluting effect ".Currently, in the world Almost all of storage heater is all made of the preheating method of high-temperature fuel gas, technology maturation, reliable for operation.And the country is temporarily without height The application of warm pure air heat accumulating type heating equipment also lacks the preheated burning device for matching use therewith.
Summary of the invention
Present invention solves the technical problem that being:Overcome the deficiencies in the prior art is set according to the heating of high temperature pure air heat accumulating type The demand of standby application, provides a kind of adjustable air/methane burner, in flow a wide range of 1:When 10 variation, it can light a fire Reliably, flameholding has the characteristics that high combustion efficiency and temperature-controllable, and in heating equipment operation phase, burner energy Enough realize the reversed sealing and the effective thermal protection of burner of high temperature and pressure air.
Technical solution of the invention is:
A kind of air/methane burner for high temperature pure air heat accumulating type heating equipment, including:Head and body portion;
Head and body portion are fixed together, and form air/methane burner overall structure, are provided with premix chamber in head, It is combustion chamber inner cavity in body portion, air enters the flow radially sprayed at premix chamber and premix chamber with cyclonic form in head Adjustable methane completes blending and forms premix gas, sudden expansion face recirculating zone is formed on head and body portion junction, in the sudden expansion face The igniting that air/methane premix gas is carried out at recirculating zone, provides preheating heat source for heat accumulating type heating equipment.
The head includes pintle structure, top cover flange, head matrix, air nozzle, fixed cylinder, homogenizing plate and eddy flow Device;
Air nozzle is fixedly connected on the matrix of head, and cyclone, homogenizing plate and fixed cylinder are successively installed on head matrix Among, top cover flange is fixedly connected on the matrix of head by fastening screw;Air enters in head by air nozzle, passes through Homogenizing plate and cyclone form cyclonic form and enter premix chamber;Pintle structure passes through top cover flange and premix chamber, and end is goed deep into Into the combustion chamber inner cavity in body portion, and pintle structure can be axially moveable relative to top cover flange;Methane passes through pintle knot In structure after cavity, radially it is injected into head premix chamber and air carries out blending and forms premix gas.
The head further includes water-cooling flange, and water-cooling flange is fixed on outside the premix chamber, for cooling down to premix chamber.
The water-cooling flange is premix cavity radiating by circulating water therein.
The pintle structure includes actuator connector, upright bar, water inlet pipe, outlet pipe, methane cavity, methane nozzle, close Seal, pintle head and cooling floor;
Actuator connector is for connecting pneumatically or electrically actuator;Actuator connector is connected to methane chamber by upright bar Body, for driving pintle structure to be axially moveable;
The pintle structure centre includes three coaxial cables, i.e. water inlet pipe, outlet pipe and methane nozzle;Form stream Road, i.e.,:Outside methane channel, inside intake tunnel and central water outlet channel;Methane enters in pintle structure by methane cavity Outside methane channel;Methane nozzle and pintle head are integrally welded, are connected through a screw thread with methane cavity;Cooling water is by intaking Pipe flow to the cooling floor of pintle structure, realizes the thermal protection of pintle head, then flows out cooling duct through outlet pipe, exhalant canal and Outside methane channel is isolated by two seals.
The pintle head and methane nozzle are integrated, and storage heater equipment is in heating period, premixed flow Stablize through pintle head in sudden expansion face recirculating zone and burns;Heating terminates, and under pneumatically or electrically actuator driven, pintle structure is to combustion Burner head movement, simultaneously closes off air and methane nozzle, and pintle head and head matrix are close by cambered surface and cone angle realization metal Envelope realizes burner head and upper to realize that the reversed face of burner is shut down under actuator pretightning force and buffer brake effect The thermal protection of play pipe road.
The methane nozzle includes multiple groups along axial parallel arrangement, the straight hole of radially uniform distribution, with the sky in premix chamber Gas is in 60~120 degree of angle sprays, is blended.
In the case that methane jet velocity is constant, range of flow maximum changes 10 times.
Body portion includes body portion flange, body portion liner, body portion outer wall and cooling tube;
Body portion liner is fixedly connected by burning body portion by body portion flange with body portion outer wall, and it is whole to constitute burning body portion Structure;More cooling tube setting cavities between burning body portion liner and body portion outer wall, it is circumferentially close uniformly distributed, constitute cooling Channel;Cooling water passes through body portion flange, passes through crack between cooling tube after reaching cooling pipe end from cooling tube internal flow It returns, it is ensured that the cooling in body portion;
Electric igniter mounting base and flame scanner are set on body portion flange, premix gas point for recirculating zone air and methane Fire, and real-time monitoring is carried out to case of fire.
The preheated burning device of a kind of high temperature pure air heat accumulating type heating equipment, the heat accumulating type heating equipment uses the sky Gas/methyl hydride combustion device is realized.
Compared with the prior art, the invention has the advantages that:
(1) air/methane burner of the invention, borrows pintle formula ejector filler design concept, and the pintle structure of design is used In adjusting methane exit area of nozzle, methane nozzle exit velocity is adjusted when changing methane flow, always with air and methane Best ratio of momentum mixing, guarantees to premix gas reliable ignition and burning within the scope of burner Wide Range.
(2) air/methane burner of the invention borrows valve seal design theory, and shut down pintle in the reversed face of design Head can realize burner pintle at the end of heating, under pneumatically or electrically actuator driven and high back voltage air effect The metal sealing of head and head matrix, achievees the purpose that burner head and upstream thermal protection.
(3) the pintle head floor type of cooling of the invention and burning body portion cooling scheme, can be realized air/methane and exist Heat accumulating type heating equipment is in the thermal protection requirement for preheating and increasing the stage.
(4) air/methane burner of the invention is used, working range is wide, and within the scope of Wide Range, can light a fire can It leans on, flameholding, and thermal protection is effective.
Detailed description of the invention
Fig. 1 is the air/methane burner structure figure for high temperature pure air heating equipment of the invention;
Fig. 2 is air/methane burner pintle structure structure chart of the invention;
Fig. 3 is that air and methane medium of the invention flow to structural schematic diagram;
Fig. 4 is the pintle structural schematic diagram of reversed face off-mode of the invention.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawings and detailed description:
A kind of adjustable air/methane burner provided by the invention meets the heating of high temperature pure air heat accumulating type and sets The demand of standby application, realizes a wide range of variable working condition and high temperature and pressure air reversely seals.It can be applied to the direct-connected examination of ultra-combustion ramjet It tests platform and other needs to provide the burner of a wide range of Variable power.
As shown in Figure 1, a kind of air/methane for high temperature pure air heat accumulating type heating equipment proposed by the present invention is burnt Device, including:Head and body portion;
Head and body portion are fixed together, and form air/methane burner overall structure, are provided with premix chamber in head, It is combustion chamber inner cavity in body portion, air enters the flow radially sprayed at premix chamber and premix chamber with cyclonic form in head Adjustable methane completes blending and forms premix gas, sudden expansion face recirculating zone is formed on head and body portion junction, in the sudden expansion face The igniting that air/methane premix gas is carried out at recirculating zone, provides preheating heat source for heat accumulating type heating equipment.
As shown in Figure 1, head include pintle structure 1, top cover flange 2, head matrix 3, air nozzle 4, fixed cylinder 5, Flowing plate 6 and cyclone 7;
Air nozzle 4 is fixedly connected on head matrix 3, and cyclone 7, homogenizing plate 6 and fixed cylinder 5 are successively installed on head Among matrix 3, top cover flange 2 is fixedly connected on head matrix 3 by fastening screw 13;Pintle structure 1 passes through top cover flange 2 And premix chamber, end is deep into the combustion chamber inner cavity in body portion, and pintle structure 1 can be along axis relative to top cover flange 2 To movement.Head further includes water-cooling flange 8, and water-cooling flange 8 is fixed on outside the premix chamber, for cooling down to premix chamber.Water Cold process orchid 8 is premix cavity radiating by circulating water therein.
As shown in Fig. 2, pintle structure 1 includes actuator connector 16, upright bar 17, water inlet pipe 18, outlet pipe 19, methane chamber Body 20, methane nozzle 21, sealing ring 22, pintle head 23 and cooling floor 24;
Actuator connector 16 is for connecting pneumatically or electrically actuator;Actuator connector 16 is connected to by upright bar 17 Methane cavity 20, for driving pintle structure 1 to be axially moveable;
1 center of pintle structure includes three coaxial cables, i.e. water inlet pipe 18, outlet pipe 19 and methane nozzle 21;Form 3 Runner, i.e.,:Outside methane channel, inside intake tunnel and central water outlet channel;Methane enters pintle knot by methane cavity 20 Outside methane channel in structure 1;Methane nozzle 21 and pintle head 23 are integrally welded, are connected through a screw thread with methane cavity 20; Cooling floor 24 is encapsulated in inside pintle head 23, and it is close by twice to form cooling water flow conduits, exhalant canal and outside methane channel Seal 22 is isolated.
As shown in figure 3, storage heater equipment, in the heating period, air dielectric 25 enters head by air nozzle 4 In portion, cyclonic form is formed by homogenizing plate 6 and cyclone 7 and enters premix chamber;Methane medium 26 is by cavity in pintle structure 1 Afterwards, head premix chamber and air dielectric 25 are radially injected into, blending formation is carried out in advance in premix chamber 28 with best ratio of momentum Mixed gas.Premixed flow, which is stablized through pintle head 23 in sudden expansion face recirculating zone, burns;Cooling water 27 flow to pintle structure 1 by water inlet pipe 18 Cooling floor 24, realize pintle head 23 thermal protection, then through outlet pipe 19 flow out cooling duct.Methane nozzle 21 includes multiple groups Along axial parallel arrangement, the straight hole of radially uniform distribution, it is in 60~120 degree of angle sprays with the air in premix chamber, is mixed It is mixed.As pintle structure 1 is axially moveable, the quantity that the straight hole of methane nozzle 1 is connected to premix chamber changes, and causes in first In the case that alkane jet velocity is constant, changes in flow rate, the present invention in, methane flow variation range maximum change 10 times.
As shown in figure 4, at the end of storage heater equipment heats, under pneumatically or electrically actuator driven, pintle knot Structure 1 is moved to burner head, simultaneously closes off air 25 and methane nozzle 21, pintle head 23 and head matrix 3 by cambered surface and Cone angle realizes metal sealing, to realize that the reversed face of burner is shut down under actuator pretightning force and buffer brake effect, realizes Burner head and upstream thermal protection.As shown in Figure 1, body portion includes body portion flange 9, body portion liner 10, body portion outer wall 11 And cooling tube 12;
Body portion liner 10 is fixedly connected by burning body portion by body portion flange 9 with body portion outer wall 11, constitutes burning body Portion's overall structure;The more setting of cooling tube 12 cavities between burning body portion liner 10 and body portion outer wall 11, circumferentially closely It is uniformly distributed, constitute cooling duct;Cooling water passes through body portion flange 9, from 12 internal flow of cooling tube, after reaching 12 end of cooling tube, It is returned by crack between cooling tube 12, when burner works long hours, can guarantee the reliable cooling in body portion;
Electric igniter mounting base and flame scanner are set on body portion flange 9, premix gas for recirculating zone air and methane Igniting is lighted a fire reliable and stable, and carries out real-time monitoring, Real-time Feedback kindling state, in case storage heater to case of fire The emergency safety of equipment is braked.
Based on above-mentioned air/methane burner, the invention also provides a kind of high temperature pure air heat accumulating type heating equipments, should The preheated burning device of heat accumulating type heating equipment is realized using the air/methane burner.
Embodiment:
According to the application demand of certain high temperature pure air heat accumulating type heating equipment, the air/methane of 50~500kW is devised Preheated burning device, structure are as shown in Figure 1.68.0~174.5g/s of the burner air working range, methane working range 1.0~ 10.0g/s can be realized the requirement under the conditions of high temperature pure air accumulation of heat heating equipment different capacity and temperature, in different works Under condition matching condition, burner can complete the reliable ignition of 10 times of condition ranges variation and stablize burning.
The air/methane burner of high temperature pure air heat accumulating type heating equipment of the present invention is examined by test of many times, is reached Expected purpose, when a wide range of variable working condition, igniting is reliable, stablizes burning, and reversed face shutdown is effective.
The foregoing description and attached drawing of present embodiment represent preferred embodiment of the invention, and those skilled in the art can root Various supplements are carried out in the range of defined without departing from the claims in the present invention according to different design requirement and design parameter, are changed Into and replacement, therefore, the present invention is extensive.

Claims (10)

1. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment, it is characterised in that including:Head and Body portion;
Head and body portion are fixed together, and form air/methane burner overall structure, are provided with premix chamber, body portion in head Interior is combustion chamber inner cavity, and it is adjustable with cyclonic form to enter the flow radially sprayed at premix chamber and premix chamber for air in head Methane complete blending and form premix gas, form sudden expansion face recirculating zone in head and body portion junction, flow back in the sudden expansion face The igniting that air/methane premix gas is carried out at area, provides preheating heat source for heat accumulating type heating equipment.
2. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 1, It is characterized in that:The head includes pintle structure (1), top cover flange (2), head matrix (3), air nozzle (4), fixed cylinder (5), homogenizing plate (6) and cyclone (7);
Air nozzle (4) is fixedly connected on head matrix (3), and cyclone (7), homogenizing plate (6) and fixed cylinder (5) are successively installed Among head matrix (3), top cover flange (2) is fixedly connected on head matrix (3) by fastening screw (13);Air passes through Air nozzle (4) enters in head, forms cyclonic form by homogenizing plate (6) and cyclone (7) and enters premix chamber;Pintle structure (1) top cover flange (2) and premix chamber are passed through, end is deep into the combustion chamber inner cavity in body portion, and pintle structure (1) is opposite It can be axially moveable in top cover flange (2);It is pre- to be radially injected into head after pintle structure (1) interior cavity for methane Mixed chamber and air carry out blending and form premix gas.
3. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 2, It is characterized in that:The head further includes water-cooling flange (8), and water-cooling flange (8) is fixed on outside the premix chamber, for premix Chamber cooling.
4. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 3, It is characterized in that:The water-cooling flange (8) is premix cavity radiating by circulating water therein.
5. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 2, It is characterized in that:The pintle structure (1) include actuator connector (16), upright bar (17), water inlet pipe (18), outlet pipe (19), Methane cavity (20), methane nozzle (21), sealing ring (22), pintle head (23) and cooling floor (24);
Actuator connector (16) is for connecting pneumatically or electrically actuator;Actuator connector (16) is connected by upright bar (17) To methane cavity (20), for driving pintle structure (1) to be axially moveable;
Pintle structure (1) center includes three coaxial cables, i.e. water inlet pipe (18), outlet pipe (19) and methane nozzle (21);3 runners are formed, i.e.,:Outside methane channel, inside intake tunnel and central water outlet channel;Methane passes through methane cavity (20) enter the outside methane channel in pintle structure (1);Methane nozzle (21) and pintle head (23) are integrally welded, with methane Cavity (20) is connected through a screw thread;Cooling water is flow to the cooling floor (24) of pintle structure (1) by water inlet pipe (18), realizes pintle The thermal protection of head (23), then cooling duct is flowed out through outlet pipe (19), exhalant canal and outside methane channel pass through two seals Enclose (22) isolation.
6. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 5, It is characterized in that:The pintle head (23) and methane nozzle (21) are integrated, storage heater equipment in the heating period, Premixed flow, which is stablized through pintle head (23) in sudden expansion face recirculating zone, burns;Heating terminates, under pneumatically or electrically actuator driven, Pintle structure (1) is moved to burner head, simultaneously closes off air and methane nozzle (21), pintle head (23) and head matrix (3) metal sealing is realized by cambered surface and cone angle, to realize that burner is anti-under actuator pretightning force and buffer brake effect It shuts down to face, realizes burner head and upstream thermal protection.
7. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 5, It is characterized in that:The methane nozzle (21) includes multiple groups along axial parallel arrangement, the straight hole of radially uniform distribution, in premix chamber Air be in 60~120 degree of angle sprays, blended.
8. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 5, It is characterized in that:In the case that methane jet velocity is constant, range of flow maximum changes 10 times.
9. a kind of air/methane burner for high temperature pure air heat accumulating type heating equipment according to claim 1, It is characterized in that:Body portion includes body portion flange (9), body portion liner (10), body portion outer wall (11) and cooling tube (12);
Body portion liner (10) is fixedly connected by burning body portion by body portion flange (9) with body portion outer wall (11), constitutes burner Body portion overall structure;More cooling tube (12) settings cavity, edges between burning body portion liner (10) and body portion outer wall (11) It is circumferential close uniformly distributed, constitute cooling duct;Cooling water passes through body portion flange (9), from cooling tube (12) internal flow, reaches cooling After managing (12) end, returned by crack between cooling tube (12), it is ensured that the cooling in body portion;
Electric igniter mounting base and flame scanner are set on body portion flange (9), premix gas point for recirculating zone air and methane Fire, and real-time monitoring is carried out to case of fire.
10. a kind of high temperature pure air heat accumulating type heating equipment, it is characterised in that:The preheated burning device of the heat accumulating type heating equipment is adopted It is realized with the air/methane burner as described in any one of claim 1~9.
CN201810805967.5A 2018-07-20 2018-07-20 Air/methane burner for high-temperature pure air heat accumulating type heating equipment Active CN108844063B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110985238A (en) * 2019-12-31 2020-04-10 西北工业大学 Variable working condition rocket engine capable of realizing height compensation
CN111271733A (en) * 2020-03-02 2020-06-12 北京航空航天大学 Combustion heater
CN111594351A (en) * 2020-06-12 2020-08-28 中国人民解放军战略支援部队航天工程大学 Variable thrust pintle injector
CN112240570A (en) * 2020-10-20 2021-01-19 西安航天动力研究所 Swirl torch igniter based on 3D printing forming

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042603A (en) * 2010-12-31 2011-05-04 中国航天科技集团公司第六研究院第十一研究所 Adjustable high-efficient waste acid combined burner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102042603A (en) * 2010-12-31 2011-05-04 中国航天科技集团公司第六研究院第十一研究所 Adjustable high-efficient waste acid combined burner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110985238A (en) * 2019-12-31 2020-04-10 西北工业大学 Variable working condition rocket engine capable of realizing height compensation
CN111271733A (en) * 2020-03-02 2020-06-12 北京航空航天大学 Combustion heater
CN111594351A (en) * 2020-06-12 2020-08-28 中国人民解放军战略支援部队航天工程大学 Variable thrust pintle injector
CN111594351B (en) * 2020-06-12 2022-02-22 中国人民解放军战略支援部队航天工程大学 Variable thrust pintle injector
CN112240570A (en) * 2020-10-20 2021-01-19 西安航天动力研究所 Swirl torch igniter based on 3D printing forming
CN112240570B (en) * 2020-10-20 2021-12-03 西安航天动力研究所 Swirl torch igniter based on 3D printing forming

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