CN107543201A - A kind of oil-poor directly injection and mixing low pollution combustor - Google Patents

A kind of oil-poor directly injection and mixing low pollution combustor Download PDF

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Publication number
CN107543201A
CN107543201A CN201710608804.3A CN201710608804A CN107543201A CN 107543201 A CN107543201 A CN 107543201A CN 201710608804 A CN201710608804 A CN 201710608804A CN 107543201 A CN107543201 A CN 107543201A
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main combustion
combustion stage
duty
level
oil
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CN107543201B (en
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于涵
孙付军
李乐
朱鹏飞
徐丁欢
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Northwestern Polytechnical University
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Northwestern Polytechnical University
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Abstract

The present invention relates to a kind of oil-poor directly injection and low pollution combustor is mixed, is made up of casing, head of combustion chamber, flame drum outer wall and burner inner liner inwall in diffuser, outer combustion case, combustion chamber;Combustion air all enters burner inner liner by head of combustion chamber, and using Grading And Zoning combustion strategies, head of combustion chamber is divided into level and main combustion stage on duty;Level and main combustion stage on duty using directly injection and mixed combustion mode, effectively avoid spontaneous combustion and the generation of tempering phenomenon, and reduce the risk of hugging appearance;The level work only on duty under idling rating, it is partially rich to design local equivalent proportion, ensure combustion chamber operational stability, with the increase of combustion chamber operational state, main combustion stage is gradually opened, under big state, main combustion stage and level on duty work simultaneously, designed combustion area average equivalent ratio is partially poor, combustion zone mean temperature is effectively reduced, so as to reduce fluff pulp.

Description

A kind of oil-poor directly injection and mixing low pollution combustor
Technical field
The invention belongs to low pollution combustor field, is related to a kind of oil-poor directly injection and mixing low pollution combustor.
Background technology
In recent years, international community is to the attention degree more and more higher of environmental protection problem, the pollutant row of aero-engine Although put account for environment gross contamination discharge proportion it is little, high-altitude pollutant is mainly derived from aero-engine.Therefore, it is international The ICAO subordinate Environmental Protection Committee of civil aviation organization CAEP has formulated series of standards to civil aircraft engine CO, UHC and NOx Discharge be made that strict regulations, Certification could be obtained by only meeting the engine of emission request.Therefore, it is necessary to send out energetically Combustion with reduced pollutants technology is opened up to reduce aero-engine pollutant emission level, so as to meet that present and following higher discharge will Ask.
At present, aero-engine combustion with reduced pollutants technology mainly includes:Fuel-rich combustion-quick extinguishing-poor oil firing's technology Rich burn-Quick quench-Lean burn, RQL, lean premixed preevaporated combustion technology Lean Premixed Prevaporised, LPP and oil-poor lean direct injection technology Lean Direct Injection, LDI, wherein oil-poor direct Spray combustion technology is also known as oil-poor directly mixed combusting technology Lean Direct Mixing, LDM.The low dirt of PW companies design Contaminating combustion chamber TALON II and use RQL technologies, its level of NOx emission can just meet CAEP6 requirement, but due in RQL technologies, Extinguishing process is possible to produce the reaction condition close to stoichiometric ratio, and so as to generate a large amount of NOx, therefore RQL technologies reduce dirt The limited potential of discharge is contaminated, it is difficult to meet the more strict discharge standards of following ICAO.The patent of GE companies application LPP technologies are applied to low pollution combustor by US6354072, US6418726, US6363726, US8607575 and US8171735 In, 50% and 60% are reduced using regulation of the combustion chamber NOx emission than CAEP6 of TAPS I and TAPS II of LPP Technology designs again, And it is used for GE9X TAPS III regulation of the NOx emission than CAEP8 also low 30%.LDI technologies are that fuel oil is directly injected into combustion Burn to mix with air in room and diffusion combustion occurs, asked due to no fuel oil and air pre-mixing, therefore in the absence of spontaneous combustion with what is be tempered Topic, and its combustion instability sex chromosome mosaicism is also serious like that without LPP.Thus many research institutions have carried out on LDI in recent years The research of technology, under the NASA ERA project supports, Goodrich companies devise array LDI combustion chambers, the NOx of the program Discharge lower than CAEP6 regulation 75%.Parker companies are under the NASA UEET project supports, it is proposed that multistage subregion LDI burnings Scheme, its pollutant emission level can meet that reduction CAEP6 provides the requirement of NOx emission 70%, the application of Dalavan companies US9644844 patents, it is proposed that a kind of oil-poor direct ejection schemes of new multiple spot, disposal of pollutants level can be effectively reduced.
Also there are many patent applications on low pollution combustor the country in recent years.Patent 201010591264.0, 201110214905.5th, 201310065034.4,201310722586.8 four kinds of low pollution combustors are disclosed, is to burn Room is divided into main combustion stage and pre-combustion grade, and wherein pre-combustion grade uses swirl stabilized diffusion combustion mode, and main combustion stage uses premixed combustion Mode, pollutant emission is reduced while combustion chamber steady operation condition is ensured.Patent 201510011730.6 discloses one Kind pre-combustion grade RQL, main combustion stage LPP center classification low pollution combustor, pre-combustion grade use rich oil diffusion combustion mode so that combustion Working stability under the small operating mode in room is burnt, and in spin chamber's tip designs quenching hole, reduces the disposal of pollutants of pre-combustion grade.It is domestic at present The widely used fractional combustion strategy of low pollution combustor, wherein main combustion stage generally uses premix and pre-evaporation combustion system, existing Under some engine behaviors, this is strictly the method for highly effective reduction pollutant, but with alternate-engine work Make being substantially improved for state, combustor inlet temperature and inlet pressure dramatically increase, using premix and pre-evaporation mode meeting band back and forth Fire and spontaneous combustion risk, and it is possible to cause serious combustion instability sex chromosome mosaicism, therefore start for following civil aviation The working condition of machine, there is an urgent need to one kind both can guarantee that combustion chamber steady operation, while and can meets the low of emission requirement Contamination combustion chamber.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of oil-poor directly injection and mixes combustion with reduced pollutants Room, combustion chamber is divided into level and main combustion stage on duty, and under small state, level work only on duty, level on duty uses the non-pre- of local rich oil Mixed lift-off flame combustion mode, ensures combustion chamber steady operation under small state;Under big state, level and main combustion stage on duty are simultaneously Work, main combustion stage is directly sprayed using multiple spot and mixed combusting technology, and the average equivalent ratio of level and main combustion stage on duty is partially poor, reduces Fluff pulp of the combustion chamber under big state.
Technical scheme
A kind of oil-poor directly injection and mixing low pollution combustor, including diffuser, burner inner liner and combustion box;It is special Sign is:Multiple staged combustion devices are circumferentially arranged at head of combustion chamber 7, and the staged combustion device includes level 8 on duty It is interior with level 8 on duty, to be outer using concentric-ring pattern arrangement and connected by welding, structure is main combustion stage 9 with main combustion stage 9:It is on duty Level nozzle 16 is coaxially placed in level cyclone inwall 13 on duty by level nozzle mounting seat 17 on duty, level nozzle mounting seat 17 on duty with The end face of level cyclone on duty is concordant, and level nozzle 16 on duty is concordant with the other end outlet damper 14 of level cyclone on duty;It is main Combustion level oil collecting ring outer wall 24 is coaxially fixed on level cyclone outer wall 12 on duty, forms main combustion stage oil-collecting ring cavity 31, end between the two The uniform multiple main combustion stage fuel inlets 23 in face;Main combustion stage oil collecting ring outer wall 24 passes through main combustion stage fuel-oil atmozation air duct ribs 25 connection main combustion stage fuel-oil atmozation air duct outer walls 26, ribs form main combustion stage fuel-oil atmozation air intlet 32, both it Between form main combustion stage cooling air and fuel-oil atmozation air duct 30;Multiple main combustion stage fuel nozzles 27, which are evenly distributed, to be fixed on The outside of level cyclone outlet baffle plate 14 on duty, with main combustion stage fuel-oil atmozation air duct outer wall 26, main combustion stage oil collecting ring outer wall 24 And level cyclone outer wall 12 on duty is connected, and it is 10 °~30 ° with the axial angle of level nozzle 16 on duty;Main combustion stage fuel nozzle Import 33 connects with main combustion stage oil-collecting ring cavity 31, the main combustion stage fuel-oil atmozation air duct 36 of nozzle and main combustion stage cooling air and Fuel-oil atmozation air duct 30 is connected, and main combustion stage is provided between level cyclone outlet baffle plate 14 and main combustion stage fuel nozzle 27 on duty Nozzle installs baffle plate 29;Main combustion stage cyclone outlet baffle plate 37 is fixed on main combustion stage fuel-oil atmozation air duct outer wall 26, passes through The non-rotational flow air channel support rib 38 of main combustion stage connects main combustion stage cyclone inwall 39, and the outside of main combustion stage cyclone inwall 39 is same The connected main combustion stage swirler blades 40 of axle, main combustion stage swirler blades 40 are main combustion stage cyclone outer wall 41;The main combustion stage spray Mouth, which is installed, is evenly equipped with cooling aperture 28 on the expansion segment of baffle plate 29 and main combustion stage cyclone outlet baffle plate 37.
The depth of axial step through hole 34 and main combustion stage fuel nozzle in the main combustion stage fuel nozzle 27 export 35 diameters Than for 5~20.
Described main combustion stage fuel nozzle inner passage length is 5-20 times of injection diameter
The angle of described value class swirler blades 11 is 30 °~50 °, and the number of blade is 6~20.
The angle of main combustion stage swirler blades 40 is 45 °~75 °, and the number of blade is 6~20.
The contraction side of described value class cyclone outlet baffle plate 14 is 30 °~60 ° with the axial angle of level 8 on duty.
The expansion segment of the main combustion stage cyclone outlet baffle plate 37 is 30 °~70 ° with the axis angle of main combustion stage 9.
Beneficial effect
One kind proposed by the present invention it is oil-poor directly spray and mix low pollution combustor, by diffuser, outer combustion case, Casing, head of combustion chamber, flame drum outer wall and burner inner liner inwall composition in combustion chamber;Combustion air is all entered by head of combustion chamber Enter burner inner liner, using Grading And Zoning combustion strategies, head of combustion chamber is divided into level and main combustion stage on duty;Level and main combustion stage on duty are equal Using directly injection and mixed combustion mode, spontaneous combustion and the generation of tempering phenomenon are effectively avoided, and reduces hugging appearance Risk;The level work only on duty under idling rating, it is partially rich to design local equivalent proportion, ensures combustion chamber operational stability, with The increase of combustion chamber operational state, main combustion stage are gradually opened, and under big state, main combustion stage and level on duty work simultaneously, design combustion It is partially poor to burn area's average equivalent ratio, combustion zone mean temperature is effectively reduced, so as to reduce fluff pulp.
Present invention advantage possessed compared with prior art is as follows:
1 uses fractional combustion concept, and head of combustion chamber is divided into level and main combustion stage on duty, solves combustion with reduced pollutants chamber-head Portion's air inflow increase and the design contradiction of small in stable condition work, on the basis of combustion chamber stable operation range is widened, effectively Reduce fluff pulp;
2 main combustion stages are avoided spontaneous combustion and tempering problem, effectively reduced using oil-poor directly injection and mixed combusting technology The risk that hugging occurs;
The injection of 3 main combustion stage fuel oils is directly sprayed using the coaxial following current with annular air, can be ensured in the full work in combustion chamber There is rational jet penetration in the range of work, and multi-point injection mode of recovering the oil, ensure that fuel oil can be mixed quickly with air Close and form uniform flammable mixed gas.
Brief description of the drawings
The loopful combustion chamber three-dimensional axonometric drawing of Fig. 1 present invention
The loopful chamber structure sectional view of Fig. 2 present invention
The head of combustion chamber structure sectional view of Fig. 3 present invention
The head of combustion chamber level structure signal on duty of Fig. 4 present invention and sectional view
The head of combustion chamber main combustion stage structural representation of Fig. 5 present invention and sectional view
The head of combustion chamber main combustion stage fuel nozzle structural representation of Fig. 6 present invention and sectional view
In figure:1- diffusers, 2- outer combustion cases, casing in 3- combustion chambers, 4- flame drum outer walls, in 5- burner inner liners Wall, 6- blending holes, 7- head of combustion chamber, 8- levels on duty, 9- main combustion stages, 10- level fuel inlets on duty, 11- level cyclones on duty Blade, 12- level cyclone outer walls on duty, 13- level cyclone inwalls on duty, 14- level cyclone outlet baffle plates on duty, 15- are on duty Level nozzle installation pad, 16- level nozzles on duty, 17- level nozzle mounting seats on duty, 18- level rotational flow air imports on duty, 19- values Class's swirl channel, 20- level rotational flow air annular straight channels on duty, 21- level rotational flow air annular convergent passages on duty, 22- Level rotational flow air outlet on duty, 23- main combustion stage fuel inlets, 24- main combustion stage oil collecting ring outer walls, the fuel-oil atmozation of 25- main combustion stages are empty Gas channel support rib, 26- main combustion stage fuel-oil atmozation air duct outer walls, 27- main combustion stage fuel nozzles, 28- cooling apertures, 29- Main combustion stage nozzle installs baffle plate, 30- main combustion stages cooling air and fuel-oil atmozation air duct, 31- main combustion stage oil-collecting ring cavities, 32- Main combustion stage fuel-oil atmozation air intlet, 33- main combustion stage fuel nozzle imports, 34- main combustion stage fuel nozzles inner passage, 35- master Fire the outlet of level fuel nozzle, 36- main combustion stage fuel-oil atmozation air ducts, 37- main combustion stage cyclone outlet baffle plates, 38- main combustion stages Non- rotational flow air channel support rib, 39- main combustion stage cyclone inwalls, 40- main combustion stage swirler blades, 41- main combustion stage cyclones Outer wall, 42- main combustion stage rotational flow air imports, 43- main combustion stage rotational flow air passages, the non-rotational flow air passage of 44- main combustion stages, 45- Main combustion stage air annular straight channel, 46- main combustion stage air annular convergent passages, 47- main combustion stage air outlet slits, 48- main combustion stages Non- rotational flow air import.
Embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described:
The present invention uses following technical scheme:It is a kind of based on it is oil-poor directly spray and mix low pollution combustor, including Diffuser, outer combustion case, casing, flame drum outer wall, burner inner liner inwall, blending hole and head of combustion chamber in combustion chamber.It is high Fast air-flow is divided into three strands after diffuser deceleration diffusion, and one enters the outer shroud that outer combustion case and flame drum outer wall surround Chamber, one enters the interior ring cavity that casing and burner inner liner inwall surround in combustion chamber, and one enters outside burner inner liner from head of combustion chamber The combustion zone that wall and burner inner liner inwall surround, the air capacity for participating in burning all enter from head of combustion chamber.The chamber head Portion uses grading combustion technology, is divided into level and main combustion stage on duty, and level and main combustion stage on duty are arranged using concentric-ring pattern and pass through weldering Connect in succession.Described value class includes level swirler blades on duty, level cyclone outer wall on duty, level cyclone inwall on duty, on duty Level cyclone outlet baffle plate, level nozzle on duty installation pad, level nozzle on duty and level nozzle mounting seat on duty, air is from level on duty Rotational flow air import enters the value surrounded by level cyclone outer wall on duty, level swirler blades on duty and level cyclone inwall on duty In class's swirl channel, so that air-flow produces rotary motion, stable recirculating zone is formed in level downstream on duty and is used for stationary value Class's flame, level nozzle on duty are arranged on level center on duty, and level jet expansion on duty keeps flat with level rotational flow air on duty outlet Together, the burning of guarantee value class is complete non-premixed combustion mode.The main combustion stage includes main combustion stage oil collecting ring outer wall, main combustion stage is fired Oil atomization air duct ribs, main combustion stage fuel-oil atmozation air duct outer wall, main combustion stage fuel nozzle, cooling aperture, main combustion Level nozzle installation baffle plate, main combustion stage cyclone outlet baffle plate, the non-rotational flow air channel support rib of main combustion stage, in main combustion stage cyclone Wall, main combustion stage swirler blades and main combustion stage cyclone outer wall, wherein main combustion stage cyclone inwall, main combustion stage swirler blades and Main combustion stage cyclone outer wall to form main combustion stage rotational flow air passage by being welded to connect, and main combustion stage cyclone inwall, main combustion stage are non- Rotational flow air channel support rib and main combustion stage cyclone outlet baffle plate to form the non-rotational flow air passage of main combustion stage by being welded to connect, Main combustion stage air one enters main combustion stage rotational flow air passage from the import of main combustion stage rotational flow air, forms rotational flow, another portion Air is divided to enter the non-rotational flow air passage of main combustion stage, subsequent rotational flow air and non-rotational flow air from the non-rotational flow air import of main combustion stage Mixed in main combustion stage air annular straight channel and eliminate eddy flow tail, then accelerated by main combustion stage air annular convergent passage Flowed out from main combustion stage air outlet slit;Main combustion stage oil collecting ring outer wall, level cyclone outer wall on duty and level cyclone outlet baffle plate on duty By being welded to connect and surrounding main combustion stage oil-collecting ring cavity, main combustion stage fuel nozzle is by welded and installed in level cyclone outlet on duty On baffle plate and main combustion stage nozzle installation baffle plate, main combustion stage fuel oil enters main combustion stage oil-collecting ring cavity from main combustion stage fuel inlet, then Enter main combustion stage fuel nozzle inner passage from the import of main combustion stage fuel nozzle, finally export and spray from main combustion stage fuel nozzle. Main combustion stage fuel-oil atmozation air and cooling air lead to from main combustion stage fuel-oil atmozation air intlet into main combustion stage fuel-oil atmozation air Road, portion of air enter main combustion stage fuel-oil atmozation air duct, and the partial air sprays together with fuel oil, promote fuel oil quick Atomization, another part air enter cooling aperture, and the partial air is used to cool down main combustion stage nozzle installation baffle plate and main combustion stage rotation Device outlet damper is flowed, prevents high-temperature fuel gas from burning out baffle plate.
The principle of the present invention is as follows:By rationally control local equivalent proportion, the average equivalent ratio in burning Indoor Combustion area with And air-fuel mixture uniformity coefficient controls the Temperature Distribution of combustion zone, so as to the growing amount of effective contaminant restraining, reach low dirt Contaminate the purpose of burning.The high velocity air come out from compressor is divided into three strands after diffuser deceleration diffusion, flows to outer shroud respectively Chamber, interior ring cavity and head of combustion chamber, combustion air whole flowing in combustion chamber head, head of combustion chamber are divided into level on duty and main combustion Level, under small state, level work only on duty, level on duty uses non-premixed combustion mode, and now level part equivalent proportion on duty is partially rich, Ensure combustion chamber under small state can steady operation, under big state, level and main combustion stage on duty work simultaneously, main combustion stage use Oil-poor directly injection and mixed combustion mode, the injection of main combustion stage fuel oil use the coaxial following current directly side of injection with annular air Formula, main combustion stage fuel oil quickly mix with rotational flow air and form uniform flammable mixed gas, now level and main combustion stage on duty averagely when It is partially poor to measure ratio, so as to effectively control combustion zone temperature, reduces fluff pulp.Therefore, this oil-poor directly spray and mixed low Contamination combustion chamber both can guarantee that engine had wide steady operation border, and and can effectively reduces fluff pulp.
Described level swirler blades angle on duty is 30 ° -50 °, number of blade 6-20.
Described main combustion stage swirler blades angle is 45 ° -75 °, number of blade 6-20.
Described main combustion stage fuel nozzle is 10 ° -30 ° with axis angle.
The contraction side of described level cyclone outlet baffle plate on duty is 30 ° -60 ° with axis angle.
The convergence side of described main combustion stage cyclone outlet baffle plate is 30 ° -70 ° with axis angle
Described main combustion stage fuel nozzle inner passage length is 5-20 times of injection diameter.
Each technological parameter is suitably adjusted, can be caused:Level part equivalent proportion on duty is 0.9-1.5;Level on duty and main combustion Level average equivalent ratio is 0.4-0.9.
In specific implementation:As shown in Figure 1-2, the specific embodiment of the invention provides a kind of based on oil-poor directly injection and mixed The low pollution combustor of conjunction, including diffuser 1, outer combustion case 2, casing 3 in combustion chamber, flame drum outer wall 4, in burner inner liner Wall 5, blending hole 6 and head of combustion chamber 7.It is divided into from the high velocity air of high-pressure compressor outflow after the deceleration diffusion of diffuser 1 Three strands, one flows to the outer ring cavity that outer combustion case 2 and flame drum outer wall 4 surround, and one flows to casing 3 and fire in combustion chamber The interior ring cavity that flame cylinder inwall 5 surrounds, one burning surrounded from head of combustion chamber 7 into flame drum outer wall 4 and burner inner liner inwall 5 Area, an air part for ring cavity is used for burner inner liner wall cooling inside and outside inflow, and another part is used for from the inflow of blending hole 6 combustion zone Combustor exit temperature distribution is adjusted, by the leaked-in air of head of combustion chamber 7 all as combustion air.Head of combustion chamber 7 Air capacity account for the 60%-80% of combustion chamber total air, cooling air volume accounts for the 20%-30% of total air, dilution air Amount accounts for the 0%-10% of total air.
As shown in figure 3, the present invention uses grading combustion technology, head of combustion chamber 7 divides for level 8 on duty and main combustion stage 9, slow Level 8 only on duty works under car state, and now 8 local equivalent proportion of level on duty is 0.9-1.5, ensures fire of the combustion chamber under small state Flame is stable, and with the increase of combustion chamber operational state, main combustion stage 9 is gradually opened, and main combustion stage 9 and level on duty 8 are same under big state When work, now two-stage average equivalent ratio is 0.4-0.9, ensure burning by it is oil-poor directly injection and mixed combustion in a manner of carries out, So as to reduce fluff pulp.
As shown in figure 4, level 8 on duty mainly includes level swirler blades 11 on duty, level cyclone outer wall 12 on duty, level on duty Cyclone inwall 13, level cyclone outlet baffle plate 14 on duty, level nozzle on duty installation pad 15, level nozzle 16 on duty and level on duty Nozzle mounting seat 17, level swirler blades 11, level cyclone outer wall 12 on duty, level cyclone inwall 13 on duty and level on duty on duty By being welded to connect, level nozzle 16 on duty and level nozzle mounting seat 17 on duty are connected through a screw thread cyclone outlet baffle plate 14, and Level nozzle installation pad 15 on duty is installed additional to play sealing function.Level air on duty flows through value from level rotational flow air import 18 on duty Class's swirl channel 19 simultaneously produces swirling motion, and swirl vane tail is eliminated in level rotational flow air annular straight channel 20 on duty Influence, then pass through level rotational flow air annular convergent passage 21 on duty and accelerate flowing, 22 shapes are exported in level rotational flow air on duty The radially high VELOCITY DISTRIBUTION in the low outside in inner side, then in downstream, streamline is expanded to form recirculating zone, and level rotational flow air on duty goes out Mouth 22 is minimum flow area position on air flow circuit, can be by changing the area come regulated value class air capacity.Level combustion on duty Oil flows into the inner passage of level nozzle mounting seat 17 on duty from level fuel inlet 10 on duty, then passes through level fuel nozzle 16 on duty Mist of oil is downstream sprayed, is then quickly well mixed to form flammable mixed gas with air.Level swirler blades 11 on duty use axle stream Formula prismatic blade, eddy flow angle are 30 ° -50 °, and blade quantity is 6-20, the contraction side of level cyclone outlet baffle plate 14 on duty with Axis angle is 30 ° -60 °, and the outlet of level fuel nozzle 16 on duty is concordant with level rotational flow air on duty 22 holdings of outlet, ensures on duty Level is burnt in a manner of non-premixed combustion.
As seen in figs. 5-6, main combustion stage is by main combustion stage oil collecting ring outer wall 24, main combustion stage fuel-oil atmozation air duct ribs 25th, main combustion stage fuel-oil atmozation air duct outer wall 26, main combustion stage fuel nozzle 27, cooling aperture 28, main combustion stage nozzle installation gear Plate 29, main combustion stage cyclone outlet baffle plate 37, the non-rotational flow air channel support rib 38 of main combustion stage, main combustion stage cyclone inwall 39, Main combustion stage swirler blades 40 and main combustion stage cyclone outer wall 41 are formed.Main combustion stage cyclone inwall 39, main combustion stage cyclone leaf Piece 40 and main combustion stage cyclone outer wall 41 are by being welded to connect, main combustion stage cyclone inwall 39 and main combustion stage cyclone outlet baffle plate Connected between 37 by the non-rotational flow air channel support rib 38 of main combustion stage, the portion of air of main combustion stage 9 is from main combustion stage rotational flow air Import 42 enters main combustion stage rotational flow air passage 43, and another part air enters main combustion stage from the non-rotational flow air import 48 of main combustion stage Non- rotational flow air passage 44, subsequent main combustion stage rotational flow air and non-rotational flow air mix in main combustion stage air annular straight channel 45 Close to weaken swirl strength and eliminate swirl vane tail, then accelerate flowing in main combustion stage air annular convergent passage 46, Finally flowed out from main combustion stage air outlet slit 47.Main combustion stage oil collecting ring outer wall 24, level cyclone outer wall 12 on duty and level eddy flow on duty By being welded to connect and surrounding main combustion stage oil-collecting ring cavity 31, main combustion stage fuel nozzle 27 is existed device outlet damper 14 by welded and installed On level cyclone outlet baffle plate 14 and main combustion stage nozzle installation baffle plate 29 on duty, main combustion stage fuel oil enters from main combustion stage fuel inlet 23 Enter main combustion stage oil-collecting ring cavity 31, then enter main combustion stage fuel nozzle inner passage 34 from main combustion stage fuel nozzle import 33, most Sprayed afterwards from main combustion stage fuel nozzle outlet 35.Main combustion stage fuel-oil atmozation air and cooling air are from main combustion stage fuel-oil atmozation air Import 32 enters main combustion stage cooling air and fuel-oil atmozation air duct 30, and portion of air enters main combustion stage fuel-oil atmozation air Passage 36, the partial air spray together with fuel oil, promote fuel oil quick break, and another part air enters cooling aperture 28, The partial air is used to cool down main combustion stage nozzle installation baffle plate 29 and main combustion stage cyclone outlet baffle plate 37, prevents high-temperature fuel gas from burning Bad baffle plate.It is 5-20 that the length of main combustion stage fuel nozzle inner passage 34 and main combustion stage fuel nozzle, which export 35 diameter ratios, main combustion Level the ratio between fuel-oil atmozation air capacity and amount of fuel are 0.5-5, and main combustion stage fuel nozzle 27 is 10 ° -30 ° with axis angle.Main combustion Level swirler blades 40 use axial-flow type prismatic blade, and eddy flow angle is 45 ° -75 °, the convergence of main combustion stage cyclone outlet baffle plate 37 Side is 30 ° -70 ° with axis angle.

Claims (7)

1. a kind of oil-poor directly injection and mixing low pollution combustor, including diffuser, burner inner liner and combustion box;Its feature It is:Multiple staged combustion devices are circumferentially arranged at head of combustion chamber (7), and the staged combustion device includes level on duty (8) it is and main combustion stage (9), interior with level on duty (8), main combustion stage (9) is arranged using concentric-ring pattern and is connected by welding to be outer, knot Structure is:Level nozzle (16) on duty is coaxially placed in level cyclone inwall (13) on duty by level nozzle mounting seat (17) on duty, on duty Level nozzle mounting seat (17) is concordant with the end face of level cyclone on duty, level nozzle (16) on duty and the other end of level cyclone on duty Face outlet damper (14) is concordant;Main combustion stage oil collecting ring outer wall (24) is coaxially fixed on level cyclone outer wall (12) on duty, both it Between form main combustion stage oil-collecting ring cavity (31), the uniform multiple main combustion stage fuel inlets (23) in end face;Main combustion stage oil collecting ring outer wall (24) Main combustion stage fuel-oil atmozation air duct outer wall (26), ribs are connected by main combustion stage fuel-oil atmozation air duct ribs (25) Main combustion stage fuel-oil atmozation air intlet (32) is formed, forms main combustion stage cooling air and fuel-oil atmozation air duct between the two (30);Multiple main combustion stage fuel nozzles (27), which are evenly distributed, to be fixed on the outside of level cyclone outlet baffle plate (14) on duty, with master It is solid to fire level fuel-oil atmozation air duct outer wall (26), main combustion stage oil collecting ring outer wall (24) and level cyclone outer wall on duty (12) Even, and with level nozzle (16) axial angle on duty it is 10 °~30 °;Main combustion stage fuel nozzle import (33) and main combustion stage oil collecting ring Chamber (31) connects, main combustion stage fuel-oil atmozation air duct (36) and main combustion stage cooling air and the fuel-oil atmozation air duct of nozzle (30) connect, main combustion stage nozzle installation gear is provided between level cyclone outlet baffle plate (14) on duty and main combustion stage fuel nozzle (27) Plate (29);Main combustion stage cyclone outlet baffle plate (37) is fixed on main combustion stage fuel-oil atmozation air duct outer wall (26), passes through main combustion Non- rotational flow air channel support rib (38) the connection main combustion stage cyclone inwall (39) of level, the outside of main combustion stage cyclone inwall (39) Coaxially connected main combustion stage swirler blades (40), main combustion stage swirler blades (40) are main combustion stage cyclone outer wall (41);It is described Cooling aperture (28) is evenly equipped with the expansion segment of main combustion stage nozzle installation baffle plate (29) and main combustion stage cyclone outlet baffle plate (37).
2. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:The main combustion stage combustion Axial step through hole (34) depth and main combustion stage fuel nozzle outlet (35) diameter ratio in oil burner nozzle (27) are 5~20.
3. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:Described main combustion stage Fuel nozzle inner passage length is 5-20 times of injection diameter.
4. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:Described value class revolves It is 30 °~50 ° to flow device blade (11) angle, and the number of blade is 6~20.
5. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:The main combustion stage rotation It is 45 °~75 ° to flow device blade (40) angle, and the number of blade is 6~20.
6. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:Described value class revolves It is 30 °~60 ° to flow the contraction side of device outlet damper (14) and level on duty (8) axial angle.
7. oil-poor according to claim 1 directly spray and mix low pollution combustor, it is characterised in that:The main combustion stage rotation It is 30 °~70 ° to flow the expansion segment of device outlet damper (37) and main combustion stage (9) axis angle.
CN201710608804.3A 2017-07-25 2017-07-25 One kind is oil-poor directly to spray and mixes low pollution combustor Active CN107543201B (en)

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CN113251440A (en) * 2021-06-01 2021-08-13 成都中科翼能科技有限公司 Multi-stage partition type combustion structure for gas turbine
CN113324262A (en) * 2021-06-16 2021-08-31 哈尔滨工程大学 Coaxial staged gas fuel combustor head for low emission gas turbine
CN113324261A (en) * 2021-06-07 2021-08-31 西北工业大学 Diffuser with rectifying plate and application thereof

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CN111174233A (en) * 2020-01-14 2020-05-19 西北工业大学 Central-grading lean-oil premixed low-pollution combustion chamber
CN111174233B (en) * 2020-01-14 2021-06-15 西北工业大学 Central-grading lean-oil premixed low-pollution combustion chamber
CN111594875A (en) * 2020-04-21 2020-08-28 南京航空航天大学 Intelligent control system for head multipoint fuel injection of combustion chamber and working method
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CN113251440A (en) * 2021-06-01 2021-08-13 成都中科翼能科技有限公司 Multi-stage partition type combustion structure for gas turbine
CN113251440B (en) * 2021-06-01 2021-11-30 成都中科翼能科技有限公司 Multi-stage partition type combustion structure for gas turbine
CN113324261A (en) * 2021-06-07 2021-08-31 西北工业大学 Diffuser with rectifying plate and application thereof
CN113324261B (en) * 2021-06-07 2022-07-05 西北工业大学 Diffuser with rectifying plate and application thereof
CN113324262A (en) * 2021-06-16 2021-08-31 哈尔滨工程大学 Coaxial staged gas fuel combustor head for low emission gas turbine

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