CN104406196B - The pre-film layered portion of a kind of twin-stage premixing high temperature rises chamber structure - Google Patents

The pre-film layered portion of a kind of twin-stage premixing high temperature rises chamber structure Download PDF

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CN104406196B
CN104406196B CN201410645127.9A CN201410645127A CN104406196B CN 104406196 B CN104406196 B CN 104406196B CN 201410645127 A CN201410645127 A CN 201410645127A CN 104406196 B CN104406196 B CN 104406196B
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air
combustion
cyclone
stage
twin
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CN104406196A (en
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刘存喜
杨金虎
刘富强
阮昌龙
穆勇
徐纲
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Institute of Engineering Thermophysics of CAS
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Abstract

The invention discloses the high temperature rise combustor structure of the pre-film layered portion of a kind of twin-stage premix, in combustion chamber, primary zone flame is divided into pre-combustion grade and main combustion stage, adopt respectively diffusion combustion and fuel direct injection burning, diffusion combustion and fuel direct injection burning coupling realize layered portion premixed combustion. Main combustion stage and pre-combustion grade fuel oil all adopt pre-membrane type air atomizing technology in passage, pre-combustion grade utilizes eddy flow and steady flame device widen the stable operation range under engine low thrust state and provide stable incendiary source for the pre-film layered portion of twin-stage premixing high temperature rises combustion chamber under engine high thrust state, and the high-temperature fuel gas that main combustion stage flame utilizes eddy flow and pre-combustion grade flame to provide stabilizes the flame. Pre-combustion grade nozzle improves atomization quality by the pre-film air atomizing of twin-stage eddy flow, and main combustion stage nozzle is by separately realizing the blending of oil gas Quick uniform fuel-oil atmozation and blending process.

Description

The pre-film layered portion of a kind of twin-stage premixing high temperature rises chamber structure
Technical field
The present invention relates to aero-engine field, relate in particular to a kind of atomization and blending substep of utilizing and carry outPre-film air atomizing and fast oil gas Mixing Technology realize the evenly layered portion premixing high temperature of burning of primary zoneRise chamber structure.
Background technology
High temperature rise combustor is that military aero-engine is needed. For meeting thrust-weight ratio 12~15 of future generationThe aerothermodynamic character of military aero-engine, military aero-engine turbine inlet temperature (TIT) is than active serviceMilitary aero-engine obviously improve. Therefore, combustion chamber components design will be burnt to high temperature rise high heat capacityFuture development. The temperature rise of active service military aero-engine combustion chamber is about 900 DEG C, follow-on military aviationFanjet requires combustion chamber temperature rise to be roughly 1400 DEG C. Along with the raising of combustion chamber temperature rise, combustion chamberHead air inlet amount obviously increases with respect to traditional combustion chamber, is increased to more than 60% by 20% left and right, willCause burning tissue, fuel-air matching and blending, wall cooling and quality controls of outlet temperature field etc. are a series ofA difficult problem, must seek at aspects such as aerothermodynamics, fuel-oil atmozation, new construction, heat-resistant light materialsBreak through.
High temperature rise combustor distributes in poor oil firing's stability and outlet temperature with respect to conventional temperature rise combustion chamberThe requirement of quality aspect can not reduce, and the oil-gas ratio under large state of high temperature rise combustor is higher, because ofThis, the challenge of the technology that first high-temperature combustion chamber faces is to widen combustion chamber stable operation range; SimultaneouslyHigh temperature rise combustor increases and needs more air to participate in burning with oil-gas ratio, after primary zone temperature increases,On the contrary still less, this has proposed new to combustion chamber wall surface is cooling with outlet temperature profile adjustment cooling air volumeA difficult problem and challenge.
For the technical research of high temperature rise combustor, some research approaches, combustion chamber are all delivered both at home and abroadHead burning tissue is the key that ensures comprehensively to meet combustibility. At present, subregion grading combustion technology is logicalCross in the time of low operating mode pre-combustion grade partial combustion and under high operating mode pre-combustion grade and main combustion stage simultaneously in primary zoneBurning, is expected to widen the stable operation range of high temperature rise combustor; Due to technical know-how reason, high temperature riseIt is less that the correlation technique of combustion chamber is published. Existing disclosed subregion classification technique utilizes fractional combustionWiden combustion chamber stable operation range, utilize the poor premixed combustion of main combustion stage for reducing NOX pollutant simultaneouslyDischarge. But poor premixed combustion exists hot acoustic shock the combustion instability problem such as to swing, with combustor inlet temperatureIncrease, combustion instability is strengthened, and is not suitable for the high temperature rise combustor that pressure ratio is higher.
Summary of the invention
The technical problem to be solved in the present invention is: for overcoming the shortcoming and defect of above-mentioned prior art, thisThe pre-film layered portion of bright twin-stage premixing high temperature rises chamber structure, adopts the pre-film layered portion burning of twin-stageTechnology, fully in conjunction with the large feature of high thrust-weight ratio engine head of combustion chamber air inflow, pre-combustion grade adopts pre-Film air atomizing improves fuel-oil atmozation quality, to improve the combustion stability under running on the lower load, main combustion stageAdopt pre-film air atomizing and fuel-oil atmozation/oil gas blending substep to realize the blending of oil gas Quick uniform, keep awayExempt from the combustion instability such as spontaneous combustion or tempering problem, in primary zone, evenly localized hyperthermia is avoided in burning simultaneously,Be conducive to the regulation and control of outlet temperature distributed mass, adjust the length of flame by main combustion stage swirl strength, forShorten chamber length.
The technical solution adopted for the present invention to solve the technical problems:
According to an aspect of the present invention, provide the pre-film layered portion of a kind of twin-stage premixing high temperature to rise combustion chamberStructure, comprise combustion box, diffuser and burner inner liner, and described diffuser is arranged on combustion boxInlet end, described burner inner liner be arranged in the inner chamber of combustion box and with the central axis of combustion boxOverlap, double-deck pre-film air atomizing is set on the end wall of a side of the close described diffuser of described burner inner linerNozzle, is characterized in that,
The circumferential arranged outside of the pre-film air atomizer spray nozzle of described bilayer has and is connected with described burner inner liner end wallBaffle head, a side that stretches into burner inner liner inside and an annular of the pre-film air atomizer spray nozzle of described bilayer are ledStream plate connects, and the pre-film air atomizer spray nozzle of described bilayer comprises main combustion stage assembly and pre-combustion grade assembly, wherein,
Described pre-combustion grade assembly comprise the central guiding flow cone that sets gradually from inside to outside, main air cyclone,Main air swirler passages shell body, secondary air swirler passages inner housing, secondary air cyclone,Second cyclone runner shell body, three grades of air cyclones and three grades of air cyclone shell bodies, wherein,
The ring of described main air swirler passages shell body and secondary air swirler passages inner housing compositionPre-combustion grade fuel gallery is set in shape cylindrical shell, in described pre-combustion grade fuel gallery, is provided with pre-combustion grade fuel oilCyclone, the entrance point of described pre-combustion grade fuel gallery is communicated with pre-combustion grade fuel pipe, the port of export is provided withAnnular oil burning jet loophole, the fuel oil flowing out through described annular oil burning jet loophole is at described main air cycloneIn the interior sidewall surface of passage shell body, form oil film, then at one-level rotational flow air and secondary rotational flow airUnder effect, carry out pre-film air atomizing;
Described main combustion stage assembly is positioned at the outer ring of described pre-combustion grade assembly coaxial with described pre-combustion grade assembly,Comprise the level Four air cyclone, the level Four air cyclone runner shell body, five that set gradually from inside to outsideLevel air cyclone runner inner housing, Pyatyi air cyclone, Pyatyi cyclone shell body and six grades of airCyclone, wherein,
The ring of described level Four air cyclone runner shell body and Pyatyi air cyclone runner inner housing compositionMain combustion stage fuel gallery is set in shape cylindrical shell, in described main combustion stage fuel gallery, is provided with main combustion stage fuel oilCyclone, the entrance point of described main combustion stage fuel gallery is communicated with main combustion stage fuel pipe, the port of export is provided withMain combustion stage oil burning jet loophole, main combustion stage fuel oil under the effect of described main combustion stage fuel oil cyclone through described masterAfter flowing out, combustion level oil burning jet loophole forms the even thin oil film of annular, being total to of level Four and Pyatyi rotational flow airUnder same-action, atomization fast, with six grades of rotational flow air blending, forms uniform gas mixture afterwards, entersEntering primary zone burns.
Preferably, described combustion box comprises casing in outer combustion case and combustion chamber.
Preferably, described burner inner liner comprises burner inner liner urceolus and burner inner liner inner core.
Preferably, described main air swirler passages shell body and secondary air swirler passages inner housingShape be substantially consistent, include inducer and outlet section, and the diameter of outlet section is less than inducerDiameter.
Preferably, described main air cyclone is arranged on described central guiding flow cone and main air cycloneBetween the inducer of passage shell body.
Preferably, described secondary air cyclone is arranged on described secondary air swirler passages inner housingBetween the inducer of outlet section and second cyclone runner shell body, described second cyclone runner shell bodyOutlet section be the diminishing taper of diameter.
Preferably, described three grades of air cyclones are arranged on the import of described second cyclone runner shell bodyBetween section and the inducer of three grades of air cyclone runner shell bodies, outside described three grades of air cyclone runnersThe outlet section of housing is the tubaeform of diameter sudden expansion, and described three grades of air cyclones are for cooling three swirlerDevice runner shell body, in the low regime that pre-combustion grade flame stabilization forms in the sudden expansion of three swirler device shell body.
Preferably, described six grades of air cyclones are radial air inlet, the bottom surface of its left side wall and described fiveThe internal face of level cyclone shell body is concordant, the central axis weight of the axis of its right side wall and combustion boxClose.
Preferably, the installation site of described level Four air cyclone and Pyatyi air cyclone is at axial locationOn the installation site of more described secondary air cyclone and three grades of air cyclones near described diffuser.
Preferably, described main air cyclone is contrary with secondary air cyclone rotation direction, and three grades of air revolveStream device is identical with second level air cyclone rotation direction.
Preferably, described level Four air cyclone is contrary with Pyatyi air cyclone rotation direction, and six grades of air revolveStream device is contrary with Pyatyi air cyclone rotation direction, to be conducive to the quick blending of main combustion stage fuel-oil atmozation and oil gas.
Preferably, described pre-combustion grade and main combustion stage fuel oil are controlled respectively.
Preferably, described three swirler device adopts strong eddy flow, makes three swirler air be close to three swirler deviceShell body flared section internal face, to ensure cooling effect, blade with respect to the tendency angle of central shaft is50~75 °, three swirler device outer side surface flared section angle is between 10~30 °.
Preferably, the pre-film air atomizer spray nozzle of described twin-stage main combustion stage fuel distribution ratio is 60~90%.
Preferably, described head of combustion chamber air inflow accounts for the 60-90% of total tolerance.
The pre-film layered portion of twin-stage of the present invention premixing high temperature rises in chamber structure, main combustion stage and pre-combustion gradeFuel oil assembly all makes full use of high thrust-weight ratio engine head of combustion chamber burning air inflow with respect to traditional combustionThe feature that chamber increases, adopts pre-film air atomizer spray nozzle in passage, and coupling diffusion combustion and fuel oil directly sprayPenetrate burning and form layered portion premixed combustion, widen combustion chamber stable operation range, improve high temperature rise simultaneouslyCombustor exit Temperature Distribution quality; Pre-combustion grade flame adopts three swirler device and the stable fire of flameholderFlame, first order air cyclone and second level air cyclone that rotation direction is contrary have utilized shearing force atomizationThe fuel oil of pre-film, the flameholder in the cooling pre-combustion grade flame of three swirler device outside; Main combustion stage flame is adoptedBurn by fuel direct injection mode, fuel-oil atmozation process is separated and is carried out with oil gas blending process, fuel oil warpMain combustion stage fuel gallery, main combustion stage fuel oil cyclone and main combustion stage oil burning jet loophole form annular thin oil film,Fuel oil carries out pre-film air atomizing under the effect of fourth stage rotational flow air and level V rotational flow air, subsequently,In main combustion stage cyclone exit, the rotational flow air in the gas mixture of atomization and the 6th grade of cyclone entersRow rapid mixing, main combustion stage adopts this atomizing type can avoid combustion instability, and can carryHigh oil gas blending quality, is conducive to the regulation and control that high temperature rise combustor outlet temperature distributes.
Principle of the present invention: the pre-film layered portion of twin-stage premixing high temperature rises combustion chamber based on layered portion premixBurning organisation realizes subregion fractional combustion, and pre-combustion grade adopts pre-film air atomizing to improve fuel-oil atmozation matterAmount, to improve the combustion stability under little state, main combustion stage adopts fuel-oil atmozation and oil gas blending to divide steppingThe pre-film air atomizing technology of row realizes the blending of oil gas Quick uniform, avoids the unstable combustion such as spontaneous combustion or temperingQualitative, the uniform main combustion stage gas mixture of blending simultaneously evenly burns in primary zone, is conducive to combustion chamberThe regulation and control that outlet temperature distributes, and the center pre-combustion grade of utilization stablizes main combustion stage flame, by main combustion stage eddy flowIntensity is adjusted the length of flame and flame forms, for shortening chamber length.
The present invention compared with prior art had advantages of:
(1) the present invention adopts layered portion premixed combustion organizational technology, fully in conjunction with high thrust-weight ratio engineThe feature that head of combustion chamber air inflow is more, the pre-film fuel oil of the twin-stage that has been coupled staged atomization, realizes a point differentiationLevel burning.
(2) pre-combustion grade fuel oil adopts pre-membrane type air atomizing to improve atomization quality, in conjunction with eddy flow and steady flame dressPut poor oil firing's stable operation range of widening under engine low thrust state, simultaneously in engine high thrustState, pre-combustion grade provides stable incendiary source for main combustion stage.
(3) main combustion stage fuel-oil atmozation adopts the method for fuel-oil atmozation and blending process substep to realize pre-film airAtomization and fast oil/gas blending, avoided the combustion instability problem of poor premixed combustion.
(4) in the present invention, the blending of main combustion stage oil gas Quick uniform can be avoided the product in district of localized hyperthermia, primary zoneRaw, be beneficial to the regulation and control of combustor exit temperature quality, utilize main combustion stage eddy flow to adjust flame forms and fire simultaneouslyFlame length, shortens chamber length.
Brief description of the drawings
Fig. 1 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises chamber structure cutaway view;
Fig. 2 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises flame combustion chamber barrel structure cutaway view;
Fig. 3 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises head of combustion chamber structure cutaway view;
Fig. 4 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises combustion chamber main combustion stage fuel nozzle knotStructure cutaway view.
Detailed description of the invention
For making object of the present invention, technical scheme and advantage clearer, develop simultaneously referring to accompanying drawingEmbodiment, further describes inventing type.
Fig. 1 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises chamber structure cutaway view, adoptsThe layered portion premixed combustion organization scheme of the pre-film of twin-stage and becate shape organization plan, comprise burning off-premises stationCasing 2 in casket 1, combustion chamber, diffuser 3, igniter 4, burner inner liner urceolus 5, burner inner liner inner core 6,Baffle head 7, deflector 8 and double-deck pre-film air atomizer spray nozzle 9.
Fig. 2 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises flame combustion chamber barrel structure cutaway view,Primary zone flame is divided into pre-combustion grade flame and main combustion stage flame, and fuel oil is respectively by main combustion stage nozzle and pre-burningLevel nozzle enters combustion chamber, and pre-combustion grade adopts diffusion combustion, stablizes work for widening combustion chamber poor oil firingMake scope, main combustion stage adopts oil-poor lean direct injection, for improving the uniformity of primary zone Temperature Distribution,Thereby improve combustor exit temperature quality.
Pre-combustion grade flame and main combustion stage flame are axially all different with radial space distribution in burner inner liner, pre-burningThe level more close head of combustion chamber of flame and center, main combustion stage flame is at the peripheral of pre-combustion grade flame and along streamTo near dirty, realize pre-combustion grade and the burning of main combustion stage subregion in combustion chamber. When low operating mode, pre-combustion grade listSolely work, when large operating mode, pre-combustion grade and main combustion stage are worked simultaneously. Main combustion stage fuel injected amount accounts for total fuel oil60~90% of amount, head of combustion chamber air inflow accounts for the 60-90% of total tolerance, main combustion stage and pre-combustion grade fuel oilNozzle makes full use of the feature of head of combustion chamber air inflow increase and adopts air atomizing, main combustion stage oil burning jetMouth separates fuel-oil atmozation and blending process, realizes the blending of oil gas Quick uniform in conjunction with pneumatic and design feature.
Fig. 3 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises head of combustion chamber structure cutaway view,Fuel nozzle comprises main combustion stage assembly and pre-combustion grade assembly, pre-combustion grade comprise pre-combustion grade central guiding flow cone 14,Main air cyclone 15, secondary air cyclone 28, three grades of air cyclones 29, pre-combustion grade fuel oilPassage, pre-combustion grade fuel oil cyclone 33 and pre-combustion grade oil burning jet loophole 20, wherein,
Central guiding flow cone 14 is positioned at the center of described device, and main air cyclone 15 is arranged at central guidingThe outside of flow cone 14, pre-combustion grade fuel gallery, pre-combustion grade burning cyclone 33 and pre-combustion grade fuel oil sprayMouth 20 is positioned at the centre of main air cyclone and secondary air cyclone, through annular oil burning jet loophole 20The fuel oil flowing out forms oil film in the interior sidewall surface of main air cyclone 15 passages, then revolves in one-levelUnder the effect of stream air and secondary rotational flow air, carry out pre-film air atomizing, three grades of air cyclones are positioned at twoThe outside of level air cyclone, for cooling three swirler device outer side surface 23, pre-combustion grade flame stabilization existsIn the low regime that 23 sudden expansions of three swirler device outer side surface form. Main combustion stage is positioned at the outer ring of described pre-combustion gradeAnd coaxial with described pre-combustion grade, comprise main combustion stage fuel pipe 19, fourth stage air cyclone 30, level VAir cyclone 31, the 6th grade of air cyclone 32 and main combustion stage fuel oil cyclone 34, main combustion stage combustionOil forms the even thin oil film of annular through cyclone 34, at the contrary fourth stage of rotation direction and level V cycloneThe lower quick atomization of pre-film of effect, then, the gas mixture of atomization is the outlet of main combustion stage cyclone and the 6thThe blending of level rotational flow air, forms uniform gas mixture.
Fig. 4 is that the pre-film layered portion of twin-stage of the present invention premixing high temperature rises combustion chamber main combustion stage fuel nozzleStructure cutaway view, comprises fourth stage air cyclone 30, level V air cyclone 31, the 6th grade of airCyclone 32, main combustion stage fuel oil cyclone 34 main combustion stage fuel galleries and main combustion stage oil burning jet loophole 35 etc.,Main combustion stage fuel oil forms the even thin oil film of annular through cyclone 34, the contrary fourth stage of rotation direction and the 5thThe pre-quick atomization of film under the effect of level cyclone, then, the gas mixture of atomization goes out at main combustion stage cycloneMouth and the 6th grade of rotational flow air blending, form uniform gas mixture, enters primary zone and burn.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all at thisWithin the spirit and principle of invention, any amendment of making, be equal to replacement, improvement etc., all should be included inWithin scope of the present invention.

Claims (12)

1. the pre-film layered portion of twin-stage premixing high temperature rises a chamber structure, comprises combustion box, expansionDepressor and burner inner liner, described diffuser is arranged on the inlet end of combustion box, and described burner inner liner is arranged onIn the inner chamber of combustion box and with the central axes of combustion box, the close institute of described burner inner linerState on the end wall of a side of diffuser double-deck pre-film air atomizer spray nozzle be set, it is characterized in that,
The circumferential arranged outside of the pre-film air atomizer spray nozzle of described bilayer has and is connected with described burner inner liner end wallBaffle head, a side that stretches into burner inner liner inside and an annular of the pre-film air atomizer spray nozzle of described bilayer are ledStream plate connects, and the pre-film air atomizer spray nozzle of described bilayer comprises main combustion stage assembly and pre-combustion grade assembly, wherein,
--described pre-combustion grade assembly comprises the central guiding flow cone, the main air eddy flow that set gradually from inside to outsideDevice, main air swirler passages shell body, secondary air swirler passages inner housing, secondary air revolveStream device, second cyclone runner shell body, three grades of air cyclones and three grades of air cyclone shell bodies,Wherein,
The ring of described main air swirler passages shell body and secondary air swirler passages inner housing compositionPre-combustion grade fuel gallery is set in shape cylindrical shell, in described pre-combustion grade fuel gallery, is provided with pre-combustion grade fuel oilCyclone, the entrance point of described pre-combustion grade fuel gallery is communicated with pre-combustion grade fuel pipe, the port of export is provided withAnnular oil burning jet loophole, the fuel oil flowing out through described annular oil burning jet loophole is at described main air cycloneIn the interior sidewall surface of passage shell body, form oil film, then at one-level rotational flow air and secondary rotational flow airUnder effect, carry out pre-film air atomizing;
--described main combustion stage assembly is positioned at the outer ring of described pre-combustion grade assembly same with described pre-combustion grade assemblyAxle, comprise the level Four air cyclone that sets gradually from inside to outside, level Four air cyclone runner shell body,Pyatyi air cyclone runner inner housing, Pyatyi air cyclone, Pyatyi cyclone shell body and six grades of skiesCyclonic current device, wherein,
The ring of described level Four air cyclone runner shell body and Pyatyi air cyclone runner inner housing compositionMain combustion stage fuel gallery is set in shape cylindrical shell, in described main combustion stage fuel gallery, is provided with main combustion stage fuel oilCyclone, the entrance point of described main combustion stage fuel gallery is communicated with main combustion stage fuel pipe, the port of export is provided withMain combustion stage oil burning jet loophole, main combustion stage fuel oil under the effect of described main combustion stage fuel oil cyclone through described masterAfter flowing out, combustion level oil burning jet loophole forms the even thin oil film of annular, being total to of level Four and Pyatyi rotational flow airUnder same-action, atomization fast, with six grades of rotational flow air blending, forms uniform gas mixture afterwards, entersEntering primary zone burns.
2. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, described main air swirler passages shell body and secondary air swirler passages inner housingShape is consistent substantially, include inducer and outlet section, and the diameter of outlet section is less than inducerDiameter.
3. the pre-film layered portion of twin-stage according to claim 1 and 2 premixing high temperature rises chamber structure,It is characterized in that, described secondary air cyclone is arranged on described secondary air swirler passages inner housingBetween the inducer of outlet section and second cyclone runner shell body, described second cyclone runner shell bodyOutlet section be the diminishing taper of diameter.
4. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, described three grades of air cyclones are arranged on the inducer of described second cyclone runner shell bodyAnd between the inducer of three grades of air cyclone shell bodies, the outlet of described three grades of air cyclone shell bodiesSection is the tubaeform of diameter sudden expansion, and described three grades of air cyclones are for cooling three grades of air cyclone shellsBody, in the low regime that pre-combustion grade flame stabilization forms three grades of air cyclone shell body sudden expansions.
5. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, described six grades of air cyclones are radial air inlet, the bottom surface of its left side wall and described PyatyiThe internal face of cyclone shell body is concordant, the axis of its right side wall and the central axes of combustion box.
6. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, the installation site of described level Four air cyclone and Pyatyi air cyclone is on axial locationThe installation site of more described secondary air cyclone and three grades of air cyclones is near described diffuser.
7. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, described main air cyclone is contrary with secondary air cyclone rotation direction, three grades of air swirlsDevice is identical with secondary air cyclone rotation direction.
8. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure, itsBe characterised in that, described level Four air cyclone is contrary with Pyatyi air cyclone rotation direction, six grades of air swirlsDevice is contrary with Pyatyi air cyclone rotation direction, to be conducive to the quick blending of main combustion stage fuel-oil atmozation and oil gas.
9. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure,It is characterized in that, described three grades of air cyclones adopt strong eddy flow, make three swirler air be close to three grades of skiesCyclonic current device shell body flared section internal face, to ensure cooling effect, blade is with respect to the tendency of central shaftAngle is 50~75 °, and three grades of air cyclone outer side surface flared section angles are between 10~30 °.
10. the pre-film layered portion of twin-stage according to claim 1 premixing high temperature rises chamber structure,It is characterized in that, the pre-film air atomizer spray nozzle of described twin-stage main combustion stage fuel distribution ratio is 60~90%.
The pre-film layered portion of 11. twin-stage according to claim 10 premixing high temperature rises chamber structure,It is characterized in that, described head of combustion chamber air inflow accounts for the 60-90% of total tolerance.
The pre-film layered portion of 12. twin-stage according to claim 2 premixing high temperature rises chamber structure,It is characterized in that, described main air cyclone is arranged on described central guiding flow cone and main air cycloneBetween the inducer of passage shell body.
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