CN105972639B - Concave-concave chamber flame stabilization burner based on air classification backward jet technology - Google Patents
Concave-concave chamber flame stabilization burner based on air classification backward jet technology Download PDFInfo
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- CN105972639B CN105972639B CN201610330834.8A CN201610330834A CN105972639B CN 105972639 B CN105972639 B CN 105972639B CN 201610330834 A CN201610330834 A CN 201610330834A CN 105972639 B CN105972639 B CN 105972639B
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- cavity
- air
- concave
- flame stabilization
- backward jet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
- F23R3/18—Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/34—Feeding into different combustion zones
Abstract
The present invention provides a kind of concave-concave chamber flame stabilization burner based on air classification backward jet technology, including auxiliary air air inlet shunting preheating section, flame stabilization cavity section, spiral-flow type R-joining backward jet section and the tapered outlet section of flaring that coaxial line is linked in sequence.The present invention uses flow distribution plate on device head, mainstream channel wall uses spiral-flow type R-joining backward jet air inlet and the tapered outlet section of flaring, burning Indoor Combustion area is split, the inclined hole air inlet of flow distribution plate both sides enters in cavity, blending disturbance is carried out with wall air inlet before and after cavity, promote the combustion process in primary zone in cavity, the air-flow wall that flow distribution plate air feeding in center and two bursts of spiral-flow type R-joining backward jet air inlets are formed, differentiation of being burnt in mainstream channel is segmented into three combustion zones, so that the good stability of flame is still ensured that when air inflow is larger, improve efficiency of combustion, the steady combustion scope of device is widened, temperature is axially distributed more uniform simultaneously, it is too high to avoid local temperature, extend service life.
Description
Technical field
The present invention relates to engine combustion control technology field, and in particular to one kind is based on air classification backward jet technology
Concave-concave chamber flame stabilization burner.
Background technology
Engine has penetrated into each main economic department, its application field as wide variety of dynamic power machine
It is related to many aspects such as sea, land and sky, service object benefits military, civilian.Combustion chamber is the important component of engine, hair
Exhibition stability and high efficiency low stain engine chamber is the target that researcher pursues.Because fuel in combustion chamber is in flow at high speed
In, fuel ignition, mixing and burning are generally relatively difficult, in the prior art, to make fuel more smooth ignition, it will usually in point
Flame range domain sets cavity.Air-flow flows through cavity can form recirculating zone in cavity, and under the effect of recirculating zone, flame resides in recessed all the time
Intracavitary, the region constantly promote the burning of unburnt gas as stable incendiary source sustained ignition incoming fresh fuel.It is recessed
Chamber integrates propellant spray, mixing enhancing and flame stabilization effect in a combustion chamber, is played in terms of engine performance is improved
Important effect.
But present inventor has found that there is also following defect for the engine with cavity by research：Firstth,
Tradition carries the combustion chamber of cavity, and under main flow straight channel intake method, the combustion zone that cavity bottom is formed is relatively stable, on cavity
The combustion zone in portion is not sufficiently stable, and fuel economy is still waited to improve；Secondth, existing combustion chamber uses single air inlet, fuel
Residence time inside cavity is not grown, and causes fuel combustion insufficient；3rd, unburnt gas enters major flow in cavity
Road, combustion zone are gradually moved to rear combustion chamber, easily cause that local temperature in combustion chamber is too high, the even feelings of temperature distributing disproportionation
Condition；4th, when air inflow is smaller in available engine combustion chamber, burning is relatively stable, and the requirement of high power burner is big
Contradiction be present with putting out phenomenon in flow.
The content of the invention
For technical problem existing for prior art, the present invention provides a kind of double based on air classification backward jet technology
Cavity flame stabilization burner, the device is while ensureing that fuel-efficient stably burns, by controlling Indoor Combustion of burning
Area, make burning indoor temperature distribution more uniform.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of concave-concave chamber flame stabilization burner based on air classification backward jet technology, including coaxial line order connect
Auxiliary air air inlet shunting preheating section, flame stabilization cavity section, spiral-flow type R-joining backward jet section and the tapered outlet of flaring connect
Section；Wherein,
The auxiliary air air inlet shunting preheating section includes auxiliary air entrance and is installed on the W types point on burner head
Flowing plate, the central area of the flow distribution plate for matrix and offer the strip straight hole with centerline axis parallel, the flow distribution plate
Two side areas offer round taper hole with central axis into 12 °~18 ° angles, the round taper hole is to deviate the center
The mode of axis tilts to upper and lower both sides；
The flame stabilization cavity section includes the top flame stabilization cavity and bottom flame stabilization cavity of relative configuration, institute
The rear surface for stating top flame stabilization cavity and bottom flame stabilization cavity is equipped with least one primary air spray orifice, cavity
Front face is equipped with least one fuel gas spurt, and the primary air spray orifice and fuel gas spurt interlaced arrangement；
The spiral-flow type R-joining backward jet section include be arranged on mainstream channel on upper tertiary air spray orifice and under three times
Air jet orifices, the tertiary air spray orifice up and down are spiral-flow type R-joining backward jet spray orifice, its airintake direction and primary air side
To on the contrary, and being mounted to central axis into 30 °~60 ° angles；
The tapered outlet section of flaring includes converging diverging channels and combustor exit, in the converging diverging channels gradually
Expand entrance equivalent diameter and be more than tapered outlet equivalent diameter.
Compared with prior art, the concave-concave chamber flame stabilization combustion provided by the invention based on air classification backward jet technology
Device is burnt, burner head uses W type flow distribution plates, and mainstream channel wall uses spiral-flow type R-joining backward jet air inlet and flaring
Tapered outlet section, burning Indoor Combustion area is split, the inclined hole air inlet of flow distribution plate both sides enters in cavity, before and after cavity
Wall air inlet carries out blending disturbance, promotes the combustion process in primary zone in cavity；Flow distribution plate axially (i.e. center) air inlet and two strands
The air-flow wall that spiral-flow type R-joining backward jet air inlet is formed, differentiation of being burnt in mainstream channel is segmented into three combustion zones so that
Flame good stability is still ensured that when air inflow is larger, efficiency of combustion is improved, has widened the steady combustion scope of burner；Together
Shi Wendu is axially distributed more uniformly to avoid that local temperature is too high, extends the service life of burner, further opens up
The wide application of burner.
Further, the flow distribution plate uses the ceramic material with strong heat accumulation function.
Further, the central area of the flow distribution plate is provided with multiple row strip straight hole, middle strip straight hole aperture compared with
Big and densely distributed, the strip straight hole aperture of middle both sides is smaller and distribution is sparse；The two side areas of the flow distribution plate is provided with
Multiple row round taper hole, and close to the round taper hole distribution comparatively dense at the flow distribution plate edge.
Further, the primary air spray orifice of the cavity rear surface is at the top of cavity, the fuel of the cavity front face
Gas spurt is close to cavity bottom.
Further, the default intake velocity of primary air spray orifice is the 1~2 of the default intake velocity of fuel gas spurt
Times.
Further, cavity front face fuel gas, cavity rear surface primary air and the part auxiliary air are in cavity
Mutually disturbance, main burning area is formed in cavity.
Further, the height ratio of the cavity rear surface and cavity front face is 1~1.2, the cavity length and cavity
The height ratio of front face is 1~1.4.
Further, the R-joining backward jet section, two strands of tertiary airs of R-joining backward jet section and flow distribution plate center two
The flat air-flow that secondary air is formed intersects the disturbance that liquidates, and the air-flow wall that flow perturbation is formed is by mainstream channel burning differentiation
It is cut into three regions：Two intermediate zones and a reverse reflux burning-out zone.
Further, the primary air spray orifice, auxiliary air entrance and the default air inlet amount ratio of tertiary air spray orifice
For 3：4：4.
Further, the auxiliary air entrance divergent segment and flame stabilization cavity rear surface, and before flame stabilization cavity
Wall is connected with mainstream channel using chamfering circular arc.
Brief description of the drawings
Fig. 1 is cuing open for the concave-concave chamber flame stabilization burner provided by the invention based on air classification backward jet technology
Face structural representation.
Fig. 2 is auxiliary air inlet distribution plate left view structural representation provided by the invention.
In figure, 11, auxiliary air entrance；12nd, flow distribution plate；121st, strip straight hole；122nd, round taper hole；21st, top fire
The stable cavity of flame；22nd, bottom flame stabilization cavity；23rd, primary air spray orifice；24th, fuel gas spurt；31st, upper tertiary air spray
Hole；32nd, lower tertiary air spray orifice；41st, converging diverging channels；42nd, combustor exit.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
In the description of the invention, it is to be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ",
The orientation of instruction such as " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or two
More than.
It refer to shown in Fig. 1 and Fig. 2, the present invention provides a kind of concave-concave chamber flame based on air classification backward jet technology
Stable combusting device, including the auxiliary air air inlet that coaxial line is linked in sequence shunt preheating section, flame stabilization cavity section, spiral-flow type
R-joining backward jet section and the tapered outlet section of flaring；Wherein,
The auxiliary air air inlet shunting preheating section includes auxiliary air entrance 11 and is installed on the W types on burner head
Flow distribution plate 12, the central area of the flow distribution plate 12 for matrix and offer the strip straight hole 121 with centerline axis parallel, institute
The two side areas for stating flow distribution plate 12 offers round taper hole 122 with central axis into 12 °~18 ° angles, the round taper hole
122 are tilted in a manner of deviateing the central axis to upper and lower both sides；
The flame stabilization cavity section includes the top flame stabilization cavity 21 and bottom flame stabilization cavity of relative configuration
22, the rear surface of the top flame stabilization cavity 21 and bottom flame stabilization cavity 22 is equipped with least one primary air spray
Hole 23, the front face of cavity are equipped with least one fuel gas spurt 24, and the primary air spray orifice 23 and fuel gas spurt
24 interlaced arrangements；
The spiral-flow type R-joining backward jet section includes the upper tertiary air spray orifice 31 and lower three being arranged on mainstream channel
Secondary air jet orifices 32, the tertiary air spray orifice up and down are spiral-flow type R-joining backward jet spray orifice, its airintake direction and main gas
Stream is in opposite direction, and is mounted to central axis into 30 °~60 ° angles；
The tapered outlet section of flaring includes converging diverging channels 41 and combustor exit 42, the converging diverging channels 41
In flaring entrance equivalent diameter be more than tapered outlet equivalent diameter.
Compared with prior art, the concave-concave chamber flame stabilization combustion provided by the invention based on air classification backward jet technology
Device is burnt, burner head uses W type flow distribution plates, and mainstream channel wall uses spiral-flow type R-joining backward jet air inlet and flaring
Tapered outlet section, burning Indoor Combustion area is split, the inclined hole air inlet of flow distribution plate both sides enters in cavity, before and after cavity
Wall air inlet carries out blending disturbance, promotes the combustion process in primary zone in cavity；Flow distribution plate axially (i.e. center) air inlet and two strands
The air-flow wall that spiral-flow type R-joining backward jet air inlet is formed, differentiation of being burnt in mainstream channel is segmented into three combustion zones so that
Flame good stability is still ensured that when air inflow is larger, efficiency of combustion is improved, has widened the steady combustion scope of burner；Together
Shi Wendu is axially distributed more uniformly to avoid that local temperature is too high, extends the service life of burner, further opens up
The wide application of burner.
As specific embodiment, the material of the flow distribution plate 12 is ceramic material, has stronger heat accumulation function, thus can
Auxiliary air is tentatively preheated with the radiations heat energy that burnt in handy mainstream channel, reduces ignition heat, certain those skilled in the art exist
On the basis of previous embodiment, other materials with heat accumulation function can also be used.W type flow distribution plates both sides offer circular oblique
Hole 122, its direction is parallel with side wall (i.e. with central axis into 12 °~18 ° angles), such as is set as with central axis into 15 °
Angle, in order to which auxiliary air introduced into cavity, promote the formation of recirculation zone in cavity, the stabilization of burning in enhancing cavity
Property；The central area of W type flow distribution plates is matrix, offers strip straight hole 121, its direction and centerline axis parallel, by dividing
The throughput and gas range of flowing plate center straight hole are all higher than throughput and gas range by both sides round taper hole, by gradually
Expand section connection cavity.Meanwhile flow distribution plate central secondary air and two strands of tertiary airs of R-joining backward jet section mutually liquidate and disturbed
Dynamic, the air-flow wall for forming flat splits the combustion zone in mainstream channel, and provides air for intermediate zone, improves fuel
Efficiency of combustion.
As the presently preferred embodiments, the central area of the flow distribution plate 12 is provided with multiple row strip straight hole 121, middle strip
Shape straight hole aperture is larger and densely distributed, and the strip straight hole aperture of middle both sides is smaller and distribution is sparse, it is possible thereby to more preferably
Flow distribution plate central secondary air is introduced spiral-flow type R-joining backward jet section by ground；The two side areas of the flow distribution plate 12 is provided with multiple row
Round taper hole 122, and close to the round taper hole distribution comparatively dense at the flow distribution plate edge, it is possible thereby to preferably by flow distribution plate two
Side auxiliary air introduces flame stabilization cavity section.
As specific embodiment, the location dislocation installation of wall spray orifice 23 and 24, is easy to before and after the flame stabilization cavity
The formation of recirculation zone in cavity；Further, by the primary air spray orifice 23 of the cavity rear surface at the top of cavity, institute
The fuel gas spurt 24 of cavity front face is stated close to cavity bottom, it is possible thereby to make fuel mutually be disturbed with primary air, recessed
Bottom of chamber portion forms stable incendiary source, realizes the primary combustion of fuel；And the igniter of combustion chamber is inserted from the bottom of cavity
Cavity, extend into combustion chamber.
As the presently preferred embodiments, the 23 default intake velocity of primary air spray orifice be fuel gas spurt 24 it is default enter
1~2 times of gas velocity degree, the resistance of fuel outflow cavity is thereby increased, and the formation for recirculating zone in cavity provides power.
As the presently preferred embodiments, cavity front face fuel gas, cavity rear surface primary air and the part auxiliary air
Mutually disturbed in cavity, main burning area is formed in cavity, it is possible thereby to which the stable combustion zone for forming cavity bottom turns into
Stable incendiary source, fresh fuel is constantly lighted, cavity top, which forms the stable combustion zone of backflow and constantly rolled up, inhales high ambient temperatures flue gas,
Promote the blending preheating between ambient gas, and have the function that to protect cavity base burning area.
As specific embodiment, the height ratio of the cavity rear surface and cavity front face is 1~1.2, the cavity length
The height ratio of degree and cavity front face is 1~1.4, thus while the pressure loss is reduced, can further increase fuel and exist
Residence time in cavity, improve the efficiency of combustion of fuel.
As specific embodiment, the spiral-flow type R-joining backward jet spray orifice is air jetting holes, its R-joining are reversely penetrated three times
Spray orifice and central axis (i.e. horizontal direction) are flowed into 30 °~60 ° of angle, and airintake direction and primary air are in opposite direction, spray orifice
After structure is spiral-flow type, thus tertiary air is rotated into combustion chamber, suction high-temperature flue gas can be rolled up, improves own temperature, drop
Low fuel ignition heat, promotes the efficient stable burning of fuel, and combustion efficiency is preferable；Thus R-joining backward jet section, tiltedly is formed
Stitch two strands of tertiary airs of backward jet section and the flat air-flow of flow distribution plate central secondary air formation intersects to liquidate and disturbed
Dynamic, flow perturbation forms air-flow wall and mainstream channel combustion zone is divided into three regions：Two intermediate zones and one are reversely
Flow back burning-out zone, and thus increase fuel while the residence time, can improve burning interior flame stability in combustion chamber.
As specific embodiment, the flaring that the mainstream channel rear is connected with spiral-flow type R-joining backward jet section is tapered
Outlet section, its tapered outlet equivalent diameter are less than flaring entrance equivalent diameter, so that when fluid flows through divergent segment, Ke Yichong
Divide diffusion combustion, be advantageous to concentrate on the high temperature in combustion chamber the center of combustion chamber；And when fluid passes through converging transition wall
During face, fluid changes flow direction, forms reverse flow, promotes and enhance the burning in reverse reflux after-flame region.
As specific embodiment, the fuel is secondary by cavity rear surface air inlet by cavity front face air inlet, primary air
Air is from mainstream channel air inlet, and tertiary air enters burning gallery by the backward jet of spiral-flow type R-joining, preferably by primary air
Spray orifice, auxiliary air entrance and the default air inlet amount ratio of tertiary air spray orifice are set to 3：4：4, it is possible thereby to be easy to burn
The formation of each recirculation zone in device, residence time of the fuel in combustion chamber is added, improves the efficiency of combustion of fuel,
Make combustion zone more stable, intra passage temperature is axially distributed more uniform.
As specific embodiment, the auxiliary air entrance divergent segment and flame stabilization cavity rear surface, and flame are steady
Determine cavity front face to be connected using chamfering circular arc with mainstream channel, it is possible thereby to reduce concentration problem of the stress in junction.
In concave-concave chamber flame stabilization burner provided by the invention based on air classification backward jet technology, described two
Auxiliary air is divided into edge by the air inlet of secondary air intake 11 by round taper hole 122 and strip straight hole 121 on flow distribution plate 12
Top flame stabilization cavity 21, bottom flame stabilization cavity 22 and along mainstream channel direction.Fuel gas spurt in the cavity
24th, primary air spray orifice 23 and part auxiliary air are mutually mixed disturbance, two recirculation zones up and down are formed in cavity, constantly
Volume inhales high ambient temperatures flue gas, and point of safes burning things which may cause a fire disaster is formed in cavity, increases the residence time of fuel and constantly to light incoming fresh
Fuel.R-joining backward jet spray orifice 31 in the burner is spiral-flow type, and two strands of tertiary airs are injected with predetermined angle
In mainstream channel, the part auxiliary air introduced with the central area strip straight hole 121 of flow distribution plate 12 is mutually mixed the disturbance that liquidates,
Burning in mainstream channel is distinguished into three：Two intermediate zones and a reverse reflux burning-out zone, are further increased
Residence time of the fuel in combustion chamber, and by flame stabilization in the front of combustion chamber, while improving fuel economy, stream
Temperature is axially distributed also more uniform in.Combustion high temperature flue gas in the burner enters converging diverging channels 41
Afterwards, the continuous diffusion combustion of fuel, the center for making burning concentrate in combustion chamber, make thermo parameters method more uniform, fluid flows through
Change flow direction during converging transition wall, promote and enhance the burning of reverse reflux burning-out zone, final high temperature combustion product is from burning
Discharged at room outlet 42, using the combustion chamber of this kind of structure, the temperature in its exit is radially distributed than more uniform.Therefore, adopt
The ignition heat of fuel can be reduced with Researched of Air Staging Combustion Burning Pulverized Coal mode provided by the invention, for improving the efficiency of combustion of fuel and changing
Kind combustion stability has the function that important.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (10)
1. the concave-concave chamber flame stabilization burner based on air classification backward jet technology, it is characterised in that including coaxial line
Auxiliary air air inlet shunting preheating section, flame stabilization cavity section, spiral-flow type R-joining backward jet section and the flaring being linked in sequence are gradually
Contracting outlet section；Wherein,
The auxiliary air air inlet shunting preheating section includes auxiliary air entrance and is installed on the W types shunting on burner head
Plate, the central area of the flow distribution plate for matrix and offer the strip straight hole with centerline axis parallel, the flow distribution plate
Two side areas offers the round taper hole into 12 °~18 ° angles with central axis, and the round taper hole is to deviate the central shaft
The mode of line tilts to upper and lower both sides；
The flame stabilization cavity section include relative configuration top flame stabilization cavity and bottom flame stabilization cavity, it is described on
The rear surface of portion's flame stabilization cavity and bottom flame stabilization cavity is equipped with least one primary air spray orifice, the antetheca of cavity
Face is equipped with least one fuel gas spurt, and the primary air spray orifice and fuel gas spurt interlaced arrangement；
The spiral-flow type R-joining backward jet section includes the upper tertiary air spray orifice being arranged on mainstream channel and lower tertiary air
Spray orifice, the tertiary air spray orifice up and down is spiral-flow type R-joining backward jet spray orifice, its airintake direction and primary air direction phase
Instead, and it is mounted to central axis into 30 °~60 ° angles；
The tapered outlet section of flaring includes converging diverging channels and combustor exit, and the flaring in the converging diverging channels enters
Mouth equivalent diameter is more than tapered outlet equivalent diameter.
2. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the flow distribution plate uses the ceramic material with strong heat accumulation function.
3. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the central area of the flow distribution plate is provided with multiple row strip straight hole, and middle strip straight hole aperture is larger and divides
Cloth is intensive, and the strip straight hole aperture of middle both sides is smaller and distribution is sparse；The two side areas of the flow distribution plate is justified provided with multiple row
Shape inclined hole, and close to the round taper hole distribution comparatively dense at the flow distribution plate edge.
4. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the primary air spray orifice of the cavity rear surface is at the top of cavity, the fuel gas spurt of the cavity front face
Close to cavity bottom.
5. the concave-concave chamber flame stabilization burner according to claim 4 based on air classification backward jet technology, its
It is characterised by, the default intake velocity of primary air spray orifice is 1~2 times of the default intake velocity of fuel gas spurt.
6. the concave-concave chamber flame stabilization burner according to claim 4 based on air classification backward jet technology, its
It is characterised by, the cavity front face fuel gas, cavity rear surface primary air and part auxiliary air the phase mutual interference in cavity
It is dynamic, main burning area is formed in cavity.
7. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the height ratio of the cavity rear surface and cavity front face is 1~1.2, the cavity length and cavity front face
Height ratio be 1~1.4.
8. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the R-joining backward jet section, the two strands of tertiary airs and flow distribution plate central secondary air of R-joining backward jet section
The flat air-flow of formation is intersected the disturbance that liquidates, and mainstream channel combustion zone is divided into three by the air-flow wall that flow perturbation is formed
Individual region：Two intermediate zones and a reverse reflux burning-out zone.
9. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
It is characterised by, the primary air spray orifice, auxiliary air entrance and the default air inlet amount ratio of tertiary air spray orifice are 3：4：
4。
10. the concave-concave chamber flame stabilization burner according to claim 1 based on air classification backward jet technology, its
Be characterised by, the auxiliary air entrance divergent segment and flame stabilization cavity rear surface, and flame stabilization cavity front face with
Mainstream channel is connected using chamfering circular arc.
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| CN201610330834.8A CN105972639B (en) | 2016-05-18 | 2016-05-18 | Concave-concave chamber flame stabilization burner based on air classification backward jet technology |
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| CN112413643B (en) * | 2020-11-23 | 2022-03-11 | 西安航天动力试验技术研究所 | Air injection mechanism for cavity-crossing-preventing high-temperature gas generation device |
| CN115371080B (en) * | 2022-07-05 | 2023-09-05 | 中国航发四川燃气涡轮研究院 | Reinforced tissue combustion chamber |
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| GB1132237A (en) * | 1965-08-12 | 1968-10-30 | Lucas Industries Ltd | Combustion apparatus for gas turbine engines |
| CN202973093U (en) * | 2012-12-28 | 2013-06-05 | 南昌航空大学 | Sudden expansion type bluff body flame stabilizer |
| CN103499106A (en) * | 2013-09-11 | 2014-01-08 | 中国科学院力学研究所 | Method for expanding stability limit of supersonic combustion flames |
| CN104764045A (en) * | 2015-04-21 | 2015-07-08 | 中国人民解放军国防科学技术大学 | Supersonic combustion chamber cavity ignition device and scramjet engine |
| CN104964310A (en) * | 2015-06-12 | 2015-10-07 | 中国航空工业集团公司沈阳飞机设计研究所 | Ramjet combustion chamber |
| CN105180212A (en) * | 2015-09-02 | 2015-12-23 | 中国人民解放军国防科学技术大学 | Combustion chamber of supersonic combustion ramjet engine |
| CN105371301A (en) * | 2015-10-08 | 2016-03-02 | 北京航空航天大学 | Staged combustor of high-temperature jet flow ignition self-stabilization flame |
| CN105402772A (en) * | 2015-12-07 | 2016-03-16 | 北京航空航天大学 | Pneumatic steady flame center staged combustor |
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