CN106482154A - The lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type - Google Patents
The lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type Download PDFInfo
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- CN106482154A CN106482154A CN201610929177.9A CN201610929177A CN106482154A CN 106482154 A CN106482154 A CN 106482154A CN 201610929177 A CN201610929177 A CN 201610929177A CN 106482154 A CN106482154 A CN 106482154A
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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
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/30—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising fuel prevapourising devices
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Abstract
The invention discloses the lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type, including diffuser, casing；Casing be internally provided with head of combustion chamber, the burner inner liner being connected with head of combustion chamber, head of combustion chamber is divided into level on duty and main two parts；Described main is looped around the outer shroud of level on duty；Described level on duty is provided with one-level axial swirler, and described main is provided with two grades of axial swirlers, three-level axial swirler；The present invention adopts diffusion combustion mode by level on duty, main adopts lean premixed preevaporated combustion mode, and the splashing type atomizing effect being combined with liquid film type atomization using the direct jet atomization of multipoint fuel, homogenous combustion flame can be formed, reduce flame temperature, so as to largely reduce NOx, UHC, CO and the discharge of the pollutant such as smolder, main restrains venturi and premix chamber design can effectively prevent the appearance of spontaneous combustion and tempering phenomenon.
Description
Technical field
The invention belongs to aero-engine field, relate generally to a kind of main with splashing type be atomized lean premixed preevaporated
Low pollution combustor.
Background technology
At present, civil engine is increasing to the pollutant of airborne release, and atmospheric pollution is also on the rise.For
Control the impact that aircraft engine emission causes to environment, International Civil Aviation Organization has just promulgated " environmental conservation mark in the eighties
Accurate " and " aero engine emissions " regulations, and constantly revise perfect, and have started to execute CAEP6 discharge standard at present, particularly right
NOx emission requires more and more stricter.In order to meet CAEP6 standard, Ge great aero-engine company and research institution all carry out low
The research of pollution combustion technology.The combustor that GE company develops adopts up-to-date bicyclic premixed swirl（Twin Annular
Premixing Swirler, TAPS）Combustor Technologies, have been used on Leap-X electromotor, and CAEP6 is compared in its NOx pollutant emission
Low by 47.7%.Pu Hui company develops TALON X combustor, on PW1000G electromotor, its NOx using RQL combustion technology
Pollutant emission is lower by 40% than CAEP6.
Traditional military secret main chamber uses diffusion combustion, and under 100% operating mode, main burning area oil-gas ratio is that chemistry is proper
When oil-gas ratio design, high combustion efficiency, but primary zone fuel gas temperature is very high, therefore can produce substantial amounts of thermal NO x；And
During slow train operating mode, efficiency of combustion is low, incomplete combustion, and therefore pollutant CO and UHC generates relatively more.Therefore, conventional diffusion combustion
Burning mode difficult to reach is at present or low pollution emission in future requires.At present, existing low pollution combustor begin with lean premixed
Pre-vaporize ＆ premix combustion technique, can reduce the discharge of pollutant NOx to a certain extent in the combustion technology of existing combustor, but
Chamber performance it cannot be guaranteed that, therefore design a kind of new combustion chamber, ensure combustor can steady operation while, and energy
Enough ensure uniform combustion flame, reduce the discharge of NOx, UHC, CO and the pollutant such as smolder, always ability to the full extent
Field technique personnel technical barrier to be solved.
Content of the invention
The present invention is directed to the deficiencies in the prior art, provides the lean premixed preevaporated low dirt that a kind of main is atomized with splashing type
Dye combustor, this combustor is by being classified to air and fuel oil, and air enters combustor from main value preset class respectively
Head；Level on duty is diffused burning using low discharge pressure atomized fog jet, and main carries out partly-premixed prevapourising burning, from
And ensure chamber performance and reduce pollutant emission.
The present invention is achieved in that the lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type,
Including diffuser, the casing being connected with diffuser；Casing be internally provided with head of combustion chamber, the fire being connected with head of combustion chamber
Flame cylinder, inside Fuel Injector Bar insertion casing, and connects in head of combustion chamber, described head of combustion chamber is circular bicyclic cavity configuration,
It is divided into level on duty and main two parts；Described main is looped around the outer shroud of level on duty；Described main includes two grades and axially revolves
Stream device, three-level axial swirler, the tongue piece between two grades of axial swirlers and three-level axial swirler, the premix at tongue piece rear
Chamber, the convergence venturi at premix chamber rear；Described convergence venturi is in the exit position of premix chamber；By in premix intracavity oil gas
Even blend, forms premix and pre-evaporation homogenous combustion flame in main convergence venturi outlet, reduces flame temperature, so as to larger
Degree reduces NOx, UHC, CO and the discharge of the pollutant such as smolder, and main convergence venturi and premix chamber design can effectively prevent spontaneous combustion
Appearance with tempering phenomenon；Multipoint fuel direct-injection type spray orifice is provided with described main, and position is relative with tongue piece.
Further, setting combuster inner ring channel and combustor outer ring channel between described burner inner liner and casing；
Combustor inner ring channel and combustor outer ring channel are designed by air mass flow Distribution dynamics；
Further, described level on duty includes converging portion, the larynx that one-level axial swirler is sequentially connected with one-level axial swirler
Road, expansion segment；Expansion segment design can not only solve head carbon-collecting problem moreover it is possible to guarantee value class downstream help to igniting with
The recirculating zone on duty of flame stabilization；Throat design can solve the problems, such as tempering and the carbon trumpet of level on duty；
Further, described Fuel Injector Bar is provided with double oil line pipes of level swirl atomizer on duty and main fuel feed pump；Described value
The center of the one-level axial swirler that class's swirl atomizer is located in level on duty；Described main fuel feed pump passes through collection chamber and master
Level is connected；The setting of double oil line pipes makes oil circuit one side pass through main fuel feed pump, then enters in burner inner liner through main
Portion；On the other hand entered back into inside burner inner liner by the level swirl atomizer on duty being arranged within Fuel Injector Bar.
Further, described main passes sequentially through collection chamber, main fuel feed pump is connected with Fuel Injector Bar.Further, described
One-level axial swirler, axial swirl vane is all installed in two grades of axial swirlers and three-level axial swirler.
Further, the blade angle of the blade angle degree of two grades of described axial swirlers and one-level axial swirler
Degree is contrary；The blade angle degree of described three-level axial swirler identical with the blade angle degree of two grades of axial swirlers or
Person is contrary.
Further, described level on duty cools down assembly with main by head internal ring and is connected；Described main and burner inner liner
Cool down assembly by head outer shroud to connect.
Further, described head internal ring cooling assembly is provided with head cooling aperture, described head internal ring cools down
Forward portion is connected with head internal ring splash pan；It is provided with head outer shroud cooling aperture on described head outer shroud cooling assembly,
Described head outer shroud cooling forward portion is connected with head outer shroud splash pan.
Further, described connected mode is to be connected with each other by welding or bolt.
The present invention is had the beneficial effects that with prior art：
（1）Air of the present invention and fuel oil are classified, and the level on duty in the present invention adopts diffusion combustion mode, can guarantee that combustor
Steady operation, the design of its expansion segment can not only solve head carbon-collecting problem moreover it is possible to guarantee value class downstream helps to light a fire
Recirculating zone on duty with flame stabilization；Throat design can solve the problems, such as tempering and the carbon trumpet of level on duty；
（2）Secondly, the main of the present invention adopts lean premixed preevaporated combustion technology, and directly sprays mist using multipoint fuel
Change the splashing type atomizing effect combining with liquid film type atomization, and formed pneumatic under the conditions of main twin-stage swirling inlet further
Atomizing effect, and in premix intracavity oil gas even blend, form premix and pre-evaporation burning or half premix and pre-evaporation combustion mode,
Main convergence venturi outlet forms premix and pre-evaporation homogenous combustion flame, reduces flame temperature, so as to largely reduce
NOx, UHC, CO and the discharge of the pollutant such as smolder, main convergence venturi and premix chamber design can effectively prevent spontaneous combustion existing with tempering
The appearance of elephant.
Brief description
Fig. 1 is that a kind of structure of lean premixed preevaporated low contamination combustion chamber that is atomized with splashing type of main of the present invention is shown
It is intended to；
Fig. 2 is that a kind of head construction of lean premixed preevaporated low contamination combustion chamber that is atomized with splashing type of main of the present invention shows
It is intended to.
Wherein, 1- level on duty, 2- main, 3- head internal ring cooling assembly, 4- head outer shroud cooling assembly, 5- burner inner liner,
6- casing, 7- Fuel Injector Bar, 8- one-level axial swirler, 9- converging portion, 10- venturi, 11- expansion segment, bis- grades of axial rotational flows of 12-
Device, 13- three-level axial swirler, 14- tongue piece, 15- premix chamber, 16- restrains venturi, and 17- head outer shroud cools down aperture, 18- head
Portion's outer shroud splash pan, 19- level on duty swirl atomizer, 20- main fuel feed pump, 21- collection chamber, 22- multipoint fuel direct-injection type spray orifice,
23- head internal ring cools down aperture, 24- head internal ring splash pan, 25- diffuser, 26- combustor inner ring channel, and 27- burning is outdoor
Ring passage, 28- head of combustion chamber.
Specific embodiment
The present invention provides the lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type, for making the present invention
Purpose, technical scheme and effect clearer, clearly, and referring to the drawings and give an actual example to the present invention further specifically
Bright.It should be understood that described herein be embodied as, only in order to explain the present invention, being not intended to limit the present invention.
The work process of the main splashing type atomizing effect of the combustor of the present invention is as follows：By from high-pressure compressor
Air, after diffuser 25 enters combustor, divides three tunnels to respectively enter combustor inner ring channel 27, head of combustion chamber 28, combustion afterwards
Burn room outer ring channel 26.Head of combustion chamber 28 includes level 1 on duty and main 2.In main 2, fuel oil（Account for the 40% of total amount of fuel
～95%）Spray through multipoint fuel direct-injection type spray orifice 22 and carry out primary atomization, by from two grades of axial swirler 12 gas of main
The impact grinding of stream, forms secondary pneumatic nebulization, then fuel oil splash forms oil film on tongue piece 14, and transports forward along tongue piece
Dynamic, the shearing-crushing of two grades of axial swirlers 12 of oil film acceptor level and three-level axial swirler 13 exit flow carries out three mists
Change, enter premix chamber 15 afterwards, fuel oil and air continue premix chamber 15 in atomization and vaporization and with air even blend after entrance
Combustion zone, forms pre- dark prevapourising burning or the burning of half premix and pre-evaporation.Can be by adjusting main multipoint fuel direct-injection type
The splashing type atomizing effect to adjust main 2 for the charge oil pressure of the spray angle of spray orifice 22 and main fuel feed pump 20, specific as follows：
The combustor of the present invention, including diffuser 25, head of combustion chamber 28, burner inner liner 5, combustor inner ring channel 26, combustor
Outer ring channel 27, Fuel Injector Bar 7 and casing 6, Fuel Injector Bar 7 is arranged on casing 6, and head of combustion chamber 28 passes through Fuel Injector Bar（7）With machine
Casket 6 is connected, setting combuster inner ring channel 27 and combustor outer ring channel 26 between burner inner liner 5 and casing 6, and burning is indoor
Ring passage 26 and combustor outer ring channel 27 are designed by air mass flow Distribution dynamics, and described Fuel Injector Bar 7 is on duty for being provided with
Level swirl atomizer 19 and double oil line pipes of main fuel feed pump 20, the primary axis that level swirl atomizer 19 on duty is located in level 1 on duty
To in the middle of cyclone 8；Main 2 passes sequentially through collection chamber 21, main fuel feed pump 20 is connected with Fuel Injector Bar 7, described chamber head
Portion 28 is circular bicyclic cavity configuration, is divided into level 1 on duty and main 2 two parts, and described main 2 is for being looped around the outer of level 1 on duty
Ring.Described level on duty 1 includes one-level axial swirler 8, converging portion 9, venturi 10, expansion segment 11, peace in one-level axial swirler 8
Equipped with axial rotational flow blade, the converging portion 9 being sequentially connected with one-level axial swirler 8, venturi 10, expansion segment 11, one-level is axially
Cyclone 8 is centered around outside level swirl atomizer 19 on duty.Main 2 include two grades of axial swirlers 12, three-level axial swirler 13,
Tongue piece 14, premix chamber 15, convergence venturi 16, main fuel feed pump 20, collection chamber 21 and multipoint fuel direct-injection type spray orifice 22, two grades of axles
To being provided with tongue piece 14 between cyclone 12 and three-level axial swirler 13, tongue piece 14 rear is provided with premix chamber 15, premix chamber
15 rears are provided with convergence venturi 16；Described convergence venturi 16 is in the exit position of premix chamber 15；Two grades of axial swirlers
12 and three-level axial swirler 12 in axial swirl vane is installed, described multipoint fuel direct-injection type spray orifice 22 is arranged under tongue piece 14
Side, described premix chamber 15 is arranged on tongue piece 14 rear, and described convergence venturi 16 is arranged on the outlet of premix chamber 15.
It is provided with head internal ring cooling assembly 3, air cools down assembly 3 through head internal ring between described level on duty 1 and main 2
On head cooling aperture 23 enter, impinging cooling is carried out to head internal ring splash pan 24, and described main 2 and burner inner liner 5 it
Between be provided with head outer shroud cooling assembly 4, air head outer shroud cooling aperture 17 enter, head outer shroud splash pan 18 is carried out
Impinging cooling.
The blade of two grades of axial swirlers 12 of described main, tongue piece 14, the blade of three-level axial swirler 13 pass through whole
The modes such as body machining, one piece casting or welding process formation, and collection chamber 21 is permissible with two grades of axial swirlers 12 of main
It is connected with each other by welding, head outer shroud splash pan 18 passes through welding or bolt connection, main with head outer shroud cooling assembly 4
2 cool down assembly 4 with head outer shroud is connected with each other by welding or bolt, and head internal ring cooling assembly 3 and main 2 pass through welding
Or bolt is connected with each other, head internal ring splash pan 24 and head internal ring are cooled down assembly 3 and are connected with each other by welding or bolt,
Head internal ring cooling assembly 3 passes through welding or bolt connection with level 1 on duty.
Described multipoint fuel direct-injection type spray orifice 22 is evenly arranged on annulus, quantity, spray angle and described main fuel feeding
The charge oil pressure of pipe 20 can be according to the blade quantity of required working condition and two grades of axial swirlers 12 of main Lai really
Fixed, described multipoint fuel direct-injection type spray orifice 22 is evenly arranged quantity on annulus and is 6～36, multipoint fuel direct-injection type spray orifice 22
Spray angle between -45～60, the charge oil pressure of main fuel feed pump 20 between 0.1MPa～4MPa, by design lead
Level fuel feed pump 20 charge oil pressure so that multipoint fuel direct-injection type spray orifice 22 spray fuel oil can be ejected on tongue piece 14, thus
Form liquid-sheet atomization, and under the twin-stage rotational flow pneumatic atomization collective effect of main, so that main 2 splashing type atomizing effect
Optimization, and the air-fuel mixture of premix chamber 15 is more uniform.
, between 20 °～65 °, blade quantity is 6～20 for the blade angle degree of the one-level axial swirler 8 of level 1 on duty
Between piece, and the rotation direction of one-level axial direction swirler blades can be counterclockwise or clockwise along airflow direction；Two grades of described main
The blade angle degree of axial swirler 12 between 20 °～60 °, blade quantity between 8～24, three-level axial swirler
13 blade angle degree between 30 °～60 °, blade quantity between 10～40, the blade of three-level axial swirler 13
Setting angle is identical or contrary with the blade angle degree of two grades of axial swirlers 12.
The angle of described level converging portion 9 on duty and centrage X between 30 °～60 °, the angle of expansion segment 11 and centrage X
Degree is between 30 °～75 °.
The air of described head of combustion chamber 28 accounts for the 50%～85% of combustor import total air, and level 1 wherein on duty accounts for head
The 20%～50% of portion's air capacity, main 2 accounts for the 50%～80% of head air capacity.
The foregoing is only the preferable possible embodiments of the present invention, not thereby limit to the scope of the claims of the present invention, thus all
It is the equivalence changes made with description of the invention and accompanying drawing content, all comprise and protection scope of the present invention.
Claims (10)
1. the lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type, including diffuser（25）, with diffusion
Device（25）The casing connecting（6）；Casing（6）Be internally provided with head of combustion chamber（28）, with head of combustion chamber（28）Connect
Burner inner liner（5）It is characterised in that
Fuel Injector Bar（7）Insertion casing（6）Inside, and in head of combustion chamber（28）Connect, described head of combustion chamber（28）For circle
The bicyclic cavity configuration of shape, is divided into level on duty（1）And main（2）Two parts；Described main（2）It is looped around level on duty（1）Outer shroud；
Described main（2）Including two grades of axial swirlers（12）, three-level axial swirler（13）, two grades of axial swirlers（12）
With three-level axial swirler（13）Between tongue piece（14）, tongue piece（14）The premix chamber at rear（15）, premix chamber（15）Rear
Convergence venturi（16）；Described convergence venturi（16）It is in premix chamber（15）Exit position；
Described main（2）On be additionally provided with multipoint fuel direct-injection type spray orifice（22）, and position and tongue piece（14）Relatively.
2. the lean premixed preevaporated low contamination combustion chamber that main according to claim 1 is atomized with splashing type, its feature
It is, described level on duty（1）Including one-level axial swirler（8）, and one-level axial swirler（8）The converging portion being sequentially connected
（9）, venturi（10）, expansion segment（11）.
3. the lean premixed preevaporated low contamination combustion chamber that main according to claim 1 is atomized with splashing type, its feature
It is, described burner inner liner（5）With casing（6）Between arrange combuster inner ring channel（27）And combustor outer ring channel
（26）.
4. the lean premixed preevaporated low contamination combustion chamber that main according to claim 1 is atomized with splashing type, its feature
It is, described Fuel Injector Bar（7）It is provided with level swirl atomizer on duty（19）With main fuel feed pump（20）Double oil line pipes；Described
Level swirl atomizer on duty（19）Positioned at level on duty（1）In one-level axial swirler（8）Center；Described main fuel feed pump
（20）With main（2）It is connected.
5. the lean premixed preevaporated low contamination combustion chamber that main according to claim 4 is atomized with splashing type, its feature
It is, described main（2）Pass sequentially through multipoint fuel direct-injection type spray orifice（22）, collection chamber（21）, main fuel feed pump（20）With
Fuel Injector Bar（7）It is connected.
6. the lean premixed preevaporated low contamination combustion chamber that main according to claim 1 is atomized with splashing type, its feature
It is, described one-level axial swirler（8）, two grades of axial swirlers（12）With three-level axial swirler（13）Inside all installation axle
To swirl vane.
7. the lean premixed preevaporated low contamination combustion chamber that main according to claim 6 is atomized with splashing type, its feature
It is, described two grades of axial swirlers（12）Blade angle degree and one-level axial swirler（8）Blade angle degree
On the contrary；Described three-level axial swirler（13）Blade angle degree and two grades of axial swirlers（12）Blade angle degree
Identical or contrary.
8. the lean premixed preevaporated low contamination combustion chamber that main according to claim 1 is atomized with splashing type, its feature
It is, described level on duty（1）With main（2）Assembly is cooled down by head internal ring（3）Connect；Described main（2）With flame
Cylinder（5）Assembly is cooled down by head outer shroud（4）Connect.
9. the lean premixed preevaporated low contamination combustion chamber that main according to claim 8 is atomized with splashing type, its feature
It is, described head internal ring cools down assembly（3）On be provided with head cooling aperture（23）, described head internal ring cooling assembly
（3）Front portion is connected with head internal ring splash pan（24）；Described head outer shroud cooling assembly（4）On be provided with head outer shroud cooling
Aperture（17）, described head outer shroud cooling assembly（4）Front portion is connected with head outer shroud splash pan（18）.
10. the lean premixed preevaporated low contamination combustion chamber that main according to claim 8 or claim 9 is atomized with splashing type, its
It is characterised by, described connected mode is to be connected with each other by welding or bolt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610929177.9A CN106482154A (en) | 2016-10-31 | 2016-10-31 | The lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type |
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|---|---|---|---|
| CN201610929177.9A CN106482154A (en) | 2016-10-31 | 2016-10-31 | The lean premixed preevaporated low contamination combustion chamber that a kind of main is atomized with splashing type |
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Cited By (4)
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| CN108626749A (en) * | 2018-03-16 | 2018-10-09 | 南京航空航天大学 | A kind of 7 points of oil-poor direct injection heads for low pollution combustor |
| CN108844097A (en) * | 2018-03-16 | 2018-11-20 | 南京航空航天大学 | A kind of oil-poor low pollution combustor directly sprayed of multiple spot |
| CN108980891A (en) * | 2018-04-27 | 2018-12-11 | 北京航空航天大学 | A kind of center classification low emission combustor head with pneumatic water conservancy diversion and anti-backfire structure |
| CN115507389A (en) * | 2022-09-02 | 2022-12-23 | 哈尔滨工程大学 | Low-pollution tower type coaxial grading swirler for liquid fuel ship |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108626749A (en) * | 2018-03-16 | 2018-10-09 | 南京航空航天大学 | A kind of 7 points of oil-poor direct injection heads for low pollution combustor |
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| CN108980891A (en) * | 2018-04-27 | 2018-12-11 | 北京航空航天大学 | A kind of center classification low emission combustor head with pneumatic water conservancy diversion and anti-backfire structure |
| CN108980891B (en) * | 2018-04-27 | 2020-08-21 | 北京航空航天大学 | Center-graded low-emission combustion chamber head with pneumatic flow guide and anti-backfire structure |
| CN115507389A (en) * | 2022-09-02 | 2022-12-23 | 哈尔滨工程大学 | Low-pollution tower type coaxial grading swirler for liquid fuel ship |
| CN115507389B (en) * | 2022-09-02 | 2024-03-19 | 哈尔滨工程大学 | Low-pollution tower type coaxial grading cyclone for liquid fuel ship |
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Application publication date: 20170308 |