CN105953265B - A kind of combined burning room - Google Patents
A kind of combined burning room Download PDFInfo
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- CN105953265B CN105953265B CN201610361623.0A CN201610361623A CN105953265B CN 105953265 B CN105953265 B CN 105953265B CN 201610361623 A CN201610361623 A CN 201610361623A CN 105953265 B CN105953265 B CN 105953265B
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 233
- 238000001704 evaporation Methods 0.000 claims abstract description 50
- 230000008020 evaporation Effects 0.000 claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000000295 fuel oil Substances 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000013461 design Methods 0.000 claims abstract description 10
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 34
- 241000251468 Actinopterygii Species 0.000 claims description 25
- 230000003134 recirculating effect Effects 0.000 claims description 23
- 239000002737 fuel gas Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 4
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 239000000567 combustion gas Substances 0.000 description 8
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
-
- 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
- F23R3/32—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising fuel prevapourising devices being tubular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/34—Feeding into different combustion zones
-
- 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
- F23R3/36—Supply of different fuels
-
- 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
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/52—Toroidal combustion chambers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Spray-Type Burners (AREA)
Abstract
The present invention relates to a kind of combined burning room, head of combustion chamber is made of main combustion stage and pre-combustion grade, and main combustion stage is by single-stage axial swirler, main combustion stage nozzle and Venturi tube composition；Pre-combustion grade is made of concave-concave chamber and pre-combustion grade nozzle.Main combustion stage of the present invention makes fuel oil reach required concentration and particle size Size Distribution using single oil circuit swirl atomizer by pressure atomization.Pre-combustion grade is sprayed onto evaporation tube by simple nozzle and is carried out primary atomization using evaporation tube nozzle, fuel oil, and secondary-atomizing and evaporation mixing are carried out with air shear action in evaporation tube.The present invention passes through fractional combustion, particularly pre-combustion grade and the special structure design of main combustion stage and arrangement, the target that low pollution combustor reduces pollutant emission can not only be reached, can also solve the problems, such as the burning of high temperature rise combustor small state unstability and big state under it is visible smolder, so as to widen the stable operation range of high temperature rise combustor.
Description
Technical field
The present invention relates to a kind of combined burning rooms, mainly as aero-engine, the combustion in ground and marine gas turbine
Burn room.
Background technology
As aero engine technology further develops, thrust-weight ratio is continuously increased, combustor inlet temperature rise, combustion chamber
Oil-gas ratio, temperature rise, the requirement to chamber performance also steps up, but at the same time exists to the limitation of combustion chamber weight
Further increase, therefore, the development of high oil-gas ratio combustion chamber is faced with many technological challenges：1st, stablize in broader scope
Work mainly solves visible smoking of the exhaust burning under combustion stability and high power state in a low-power state；2nd, exist
Under conditions of cooling tolerance distribution reduces and cools down gas quality decline, further keep even improving the durability of burner inner liner；3、
The discharge of pollutant is reduced under big state；4th, turbine works normally under the adverse circumstances of excessive temperature, it is necessary to be greatly lowered
Combustor exit temperature breadth coefficient.The approach to solve the above problems can be divided into two classes, and one kind is the optimization that takes reasonable measure
Conventional swirl stabilized combustion room, feasible measure include fuel oil classification, air classification, lean premixed and prevapourising and multistage
Eddy flow etc.；It is another kind of, it is that brand-new combustion method, development new concept combustion are explored on the basis of basic principle is grasped
Room, such as standing vortex burning chamber (trapped vortex combustor, TVC), ultra-compact combustion chamber (ultra compact
Combustor, UCC) etc..
On the other hand, with the rapid development of aero engine technology, the increasingly fierceness of market competition and environmental requirement
Constantly stringent, big aircraft engine is towards expense is lower, performance higher and the better direction of environmental protection characteristic develop.For this purpose, changing
Develop into engines such as development GE90, PW4084, TRENT800 and completely newly GP7200, TRENT900, GEnx and TRENT1000 etc.
While engine, performance is developed and demonstrated in a series of beforehand research plan of USA and EU country independence or Joint Implementation
Height, light weight, reliability are high and discharge is low with noise the big aircraft engine technology of following regular circulation, exploratory development is more
Good technology has been laid in the big aircraft engine technology of advanced cycling economical and environmentally friendly, the development for following big aircraft engine
Basis.
The content of the invention
The present invention provides a kind of combined burning room, and main combustion stage to combine with the special construction and arrangement of pre-combustion grade
The flowing of combustion chamber pre-combustion grade is substantially from the influence of main combustion stage, not only so that the flame stabilization performance of combined burning room is better than biography
The swirl combustion chamber of system and traditional standing vortex burning chamber and so so that main combustion stage feed fuel oil when, the surrounding of combustion gas has
The combustion gas of high temperature and flame, further improve combustibility.And pre-combustion grade cavity and calotte are subjected to integrated design, make
Obtain the more compact structure of combined burning room, space availability ratio higher.
The present invention adopts the following technical scheme that：A kind of combined burning room, including diffuser, interior casing, outer casing, fuel feeding system
System, high-energy ignition sparking plug and burner inner liner, the burner inner liner form the inside and outside circuit of combustion chamber with interior casing and outer casing；Burner inner liner
Head is made of main combustion stage and pre-combustion grade；
The main combustion stage includes several level-one axial direction main combustion stage cyclone, Venturi tube and main combustion stage fuel nozzles, described
Level-one axial direction main combustion stage cyclone is uniformly arranged on flame tube head centre, by joining flame between adjacent main combustion stage cyclone
Plate is fixedly connected；
The pre-combustion grade includes the outer cavity of pre-combustion grade, pre-combustion grade inner cavity and pre-combustion grade fuel nozzle, outside the pre-combustion grade
Cavity is to protrude the cavity body structure formed, the pre-burning by the flame tube wall for being located at the flame tube head on the outside of main combustion stage cyclone
Grade inner cavity is to protrude the cavity body structure formed by the flame tube wall for being located at the flame tube head on the inside of main combustion stage cyclone；It is described
The outer cavity of pre-combustion grade and pre-combustion grade inner cavity are arc by annulus wall that an axial cross section is straight line and an axial cross section
Arc ring wall one end integral type connection composition, the annulus wall face main combustion stage cyclone and perpendicular to connection flame plate；
Several interior side-inlets, arc ring are offered on the annulus wall of the outer cavity of the pre-combustion grade and pre-combustion grade inner cavity
Several outer side-inlets are offered on wall；Wherein inside air admission hole, which had both been played, blends to reach rational with pre-combustion grade fuel oil
Oil-gas ratio plays the role of cooling down cavity front face and evaporation tube again.On the one hand outside air admission hole plays in auxiliary air admission hole recessed
On the other hand flame tube wall that cavity downstream is played the role of cooling down in stable recirculating zone is formed in chamber.
The high-energy ignition sparking plug is arranged on the outside of the outer cavity of pre-combustion grade.The high-temperature fuel gas of the pre-combustion grade, by joining flame
Flame is transferred to from outer cavity in inner cavity by plate, so under big state when main combustion stage supplies fuel oil, the combustion gas of main combustion stage
Surrounding can have high-temperature fuel gas and flame so that the fuel oil burning of main combustion stage is more abundant under big state.
Further, the pre-combustion grade fuel nozzle is evaporation tube nozzle.
Further, the evaporation tube nozzle is made of simple nozzle, air inlet fish mouth and evaporation cavity, the air inlet fish
Mouth be with the integrated design of arc ring wall into fish mouth shaped air inlet, so entirely evaporation tube nozzle and cavity relative position
So that entire evaporation tube nozzle all has higher temperature in most of state in addition to fired state, be conducive to the steaming of fuel oil
Hair.Simple nozzle spray fuel oil and suction nozzle in air it is tangent so that fuel oil carry out secondary-atomizing, be conducive to fuel oil into
Evaporate to one step.
Further, the oil supply system includes pre-combustion grade oil supply system, main combustion stage oil supply system and cyclone；It is described pre-
Combustion grade oil supply system includes：The outer cavity fuel manifold import of pre-combustion grade, the outer cavity fuel manifold of pre-combustion grade, pre-combustion grade evaporation tubular type
The air inlet fish mouth of nozzle, pre-combustion grade evaporation tube nozzle evaporation cavity, the import of pre-combustion grade inner cavity fuel manifold, pre-combustion grade inner cavity
Fuel manifold, pre-combustion grade evaporation tube nozzle mix gas spurt；Fuel oil from simple nozzle spray into pre-combustion grade evaporate tube nozzle into
Primary atomization is carried out in gas fish mouth and with carrying out secondary-atomizing blending into the air in pre-combustion grade evaporation tube nozzle is tangent, mixed
Gas evaporates further evaporation mixing in tube nozzle evaporation cavity in the air inlet fish mouth of pre-combustion grade evaporation tube nozzle with pre-combustion grade
And it mixes to spray in gas spurt from pre-combustion grade evaporation tube nozzle and reaches required with carrying out blending into the air in cavity and work as
Amount ratio；Wherein：Wanting control range that mixed gas is made to be unable to spontaneous combustion into the air in air inlet fish mouth and the equivalent proportion of fuel oil will not
It is tempered.
Further, the interior side-inlet is apart from 3 to 5 millimeters of cavity arc ring wall section, and the outer side-inlet is in axis
It is flushed to position with main combustion stage cyclone outlet.This design method is conducive to form stable pre-burning in cavity outside pre-combustion grade
The outer cavity recirculating zone of grade；Stable pre-combustion grade inner cavity recirculating zone is formed in pre-combustion grade inner cavity.
Further, it is divided into three strands, one into combustion chamber after diffuser slows down supercharging from the air of blower outlet
The bypass road into combustion chamber, the interior circuit for being partly into combustion chamber, a part is divided to enter burning by the cyclone on head
Room；
Bypass road air-flow is divided into six parts：(1) side-inlet enters outer cavity in cavity outside pre-combustion grade；(2) from pre-burning
The outer side-inlet of the outer cavity of grade enters outer cavity；(3) into the air inlet fish mouth of the outer cavity evaporation tube nozzle of pre-combustion grade and with
The mixed gas that fuel oil forms certain equivalent proportion is entered back into outer cavity；(4) enter from the cooling hole on flame tube wall in burner inner liner；
(5) cut off into burner inner liner from the primary holes on burner inner liner and assist to form main combustion stage recirculating zone；(6) from burner inner liner
Into burner inner liner in blending hole, carry out blending with high-temperature fuel gas and adjust outlet temperature field；
Interior circuit air-flow is divided into six parts：(1) side-inlet enters inner cavity out of pre-combustion grade inner cavity；(2) from pre-burning
The outer side-inlet of grade inner cavity enters inner cavity；(3) into pre-combustion grade inner cavity evaporation tube nozzle air inlet fish mouth in and with
The mixed gas that fuel oil forms certain equivalent proportion is entered back into inner cavity；(4) it is right in burner inner liner to enter from the cooling hole on flame tube wall
Flame tube wall is cooled down；(5) cut off into burner inner liner from the primary holes on burner inner liner and assist to form main combustion stage reflux
Area；(6) carry out blending into burner inner liner from the blending hole on burner inner liner with high-temperature fuel gas and adjust outlet temperature field.
Further, the main combustion stage swirler blades established angle is between 30 degree to 45 degree, and blade quantity is at 8 to 12
Between, swirling number is between 0.45 to 0.8.
Further, the combined burning room is loopful shape structure.
Further, in engine start, electric spark of the high-energy ignition sparking plug release with number Joule energy will be flammable
Gaseous mixture is lighted, and forms stable flame under the recirculating zone effect in cavity；It is blocked up joining shaft section, i.e. mainstream where flame plate
Shaft section is filled in, the high temperature mixed air-flow of having fired in outer cavity is converged with the unburned mixed gas in inner cavity to connection flame plate and lights inner cavity
Unburned mixed gas；There was only cavity fuel feeding during small state, mainstream fuel feeding and the primary air shape with passing through cyclone when big state
Into mainstream combustion gas, the work for the fixed incendiary source that high-temperature fuel gas of the mainstream combustion gas after the wake flame of concave-concave chamber and connection flame plate is formed
It ignites under, after mainstream is ignited, from mainstream newly into mixed gas, in mainstream recirculating zone, cavity wake flame joins the height after flame plate
Stablize burning under the collective effect of warm combustion gas, the high-temperature fuel gas in primary zone and dilution air carry out blending outflow burner inner liner and go forward side by side one
Walk impulse turbine.
The present invention has the advantages that：
(1) combined burning room of the present invention is a kind of fractional combustion room, due to the special structure of pre-combustion grade and main combustion stage with
Position Design can realize the efficient low-discharging burning under wider operating mode；In conventional combustion room, air after cyclone by producing
Raw recirculating zone, high-temperature fuel gas upstream lights fresh flammable mixed gas under being acted in recirculating zone, therefore recirculating zone acts as stable point
The effect of burning things which may cause a fire disaster.Combined burning room then employs the concept of Grading And Zoning burning, and pre-combustion grade is set by flame tube head by special
The inside and outside concave-concave chamber composition counted and formed, the air in cavity is entered by rationalization, makes the whirlpool that stabilization is formed in cavity
Fluidal texture, while fuel oil is fed, since vortex is stayed calmly in pre-combustion grade, burning can be stablized under various operating modes；
Main combustion stage (mainstream) air enters main burning area by the cyclone on head, and cyclone acts the work for strengthening blending and flame stabilization
Being used for propagating flame with, the connection flame plate that the flame tube wall between two cyclones is formed makes main combustion stage (mainstream) being capable of smooth quilt
Pre-combustion grade flame ignition.Under small state, only pre-combustion grade fuel feeding, main combustion stage (mainstream) not fuel feeding；Under big state, pre-combustion grade,
Main combustion stage (mainstream) while fuel feeding work.
(2) combined burning room of the present invention, due to pre-combustion grade and the special structure and Position Design of main combustion stage so that pre-burning
The stability of air flow condition and flame in grade, so as to improve ignition performance, is opened up hardly by the flow effect of main combustion stage
Wide range of flame；
(3) in high thrust-weight ratio or low emission level engine, using the burning of the organizationally efficient stabilization in combined burning room, and
Effectively reduce the discharge for emitting smoke and gas state pollutant；
(4) combined burning room fuel system of the invention is simpler, and head of combustion chamber is compacter, is greatly shortened
The axial length of combustion chamber.
Description of the drawings
Fig. 1 is the loopful structure diagram of combined burning room of the present invention.
Fig. 2 is the partial sectional view of combined burning room shown in Fig. 1.
Fig. 3 is the burner inner liner loopful schematic diagram in combined burning room shown in FIG. 1.
Fig. 4 is combined burning room oil supply system structure diagram of the present invention.
Fig. 5 sectional flow and combustion process schematic diagram where the cyclone of combined burning room of the present invention.
Fig. 6 is place shaft section flowing and combustion process schematic diagram among two cyclones in combined burning room of the present invention.
Wherein：
It is 1- combined burnings room, 2- diffusers, the outer casings of 3-, casing in 4-, 5- main combustion stages fuel manifold, recessed outside 6- pre-combustion grades
Chamber fuel manifold, 7- pre-combustion grade inner cavities fuel manifold, 8- Fuel Injector Bars, 9- main combustion stages fuel nozzle, the spray of 10- pre-combustion grades fuel oil
Mouth, 11- cyclones, 12- Venturi tubes, the air inlet fish mouth of 13- pre-combustion grades evaporation tube nozzle, 14- pre-combustion grades evaporation tube nozzle
Evaporation cavity, 15- pre-combustion grades evaporation tube nozzle mix gas spurt 16- pre-combustion grades outer cavity, 17- pre-combustion grades inner cavity, 18- pre-combustion grades
Air admission hole on the inside of the outer cavity of air admission hole, 19- pre-combustion grades, air admission hole, 21- pre-burning on the outside of 20- pre-combustion grade inner cavities on the outside of outer cavity
The outer cavity recirculating zone of air admission hole, 22- pre-combustion grades, 23- pre-combustion grade inner cavities recirculating zone, the reflux of 24- main combustion stages on the inside of grade inner cavity
Area, 25- main combustion stages recirculating zone, 26- connection flames plate, 27- high-energy ignitions sparking plug, 28- high-energy ignition sparking plugs mounting seat, 29- flames
Cylinder, 30- primary holes, 31- blending holes, 32- cooling holes, 33- outer ring channels, 34- inner ring channels, 35- main combustion stages fuel manifold into
The outer cavity fuel manifold import of mouth, 36- pre-combustion grades, 37- pre-combustion grade inner cavity fuel manifold imports.
Specific embodiment
Below in conjunction with the accompanying drawings and the present invention is discussed in detail in specific embodiment.
It refer to shown in Fig. 1 to Fig. 5, combined burning room of the present invention, mainly by diffuser 2, outer combustion case 3 and interior machine
Casket 4, head have the compositions such as the burner inner liner 29, high-energy ignition sparking plug 27, cyclone 11 of concave-concave cavity configuration.The combined burning room
For loopful shape structure, the pre-burning formed using cavity 16 outside the pre-combustion grade by special construction design with pre-combustion grade inner cavity 17
Flame is stablized in the outer cavity recirculating zone 22 of grade and pre-combustion grade inner cavity recirculating zone 23, by the burner inner liner wall institute shape between two cavitys
Into connection flame plate 26 flame is reached into inner cavity 17 and mainstream by outer cavity 16.
In combustion chamber, import sets diffuser 2, and main function is to reduce by 29 inlet air flow velocity of burner inner liner, improves import
Pressure, this advantageously reduces the pressure loss, tissue burning.Wherein the outer casing 3 of combined burning room, interior casing 4 are combustion chambers
Main load component, and constitute the outer ring channel 33 of combustion chamber and inner ring channel 34 with burner inner liner 29.
The outer cavity 16 of pre-combustion grade further includes side-inlet in the outer side-inlet 18 of the outer cavity of pre-combustion grade and the outer cavity of pre-combustion grade
19, the wherein outer side-inlet 18 of the outer cavity of pre-combustion grade is flushed in axial position with the outlet of cyclone 11, on the inside of the outer cavity of pre-combustion grade
3 to 5 millimeters of the cavity arc section outside pre-combustion grade of air inlet 19, this design method are conducive to outside pre-combustion grade shape in cavity 16
Cavity recirculating zone 22 outside into stable pre-combustion grade；Pre-combustion grade inner cavity 17 further includes the outer side-inlet 20 of pre-combustion grade inner cavity and pre-
Side-inlet 21 in grade inner cavity is fired, the wherein outer side-inlet 20 of pre-combustion grade inner cavity exports together in axial position and cyclone 11
Flat, apart from 3 to 5 millimeters of pre-combustion grade inner cavity arc section, this design method is conducive to side-inlet 21 in pre-combustion grade inner cavity
Stable pre-combustion grade inner cavity recirculating zone 23 is formed in pre-combustion grade inner cavity 17.Oil supply system include pre-combustion grade oil supply system,
Main combustion stage oil supply system and cyclone, pre-combustion grade oil supply system include：Outside the outer cavity fuel manifold import 36 of pre-combustion grade, pre-combustion grade
Cavity fuel manifold 6, the air inlet fish mouth 13 of pre-combustion grade evaporation tube nozzle, pre-combustion grade evaporation tube nozzle evaporation cavity 14；Pre-burning
Grade inner cavity fuel manifold import 37, pre-combustion grade inner cavity fuel manifold 7, pre-combustion grade evaporation tube nozzle air inlet fish mouth 13,
Pre-combustion grade evaporation tube nozzle evaporation cavity 14, pre-combustion grade evaporation tube nozzle mix gas spurt 15；Fuel oil is sprayed into from simple nozzle
Primary atomization is carried out in the air inlet fish mouth of pre-combustion grade evaporation tube nozzle and with evaporating the air in tube nozzle into pre-combustion grade
Tangent progress secondary-atomizing blending mixes gas and evaporates tube nozzle with pre-combustion grade in the air inlet fish mouth of pre-combustion grade evaporation tube nozzle
In evaporation cavity further evaporation mixing and being mixed from pre-combustion grade evaporation tube nozzle sprayed in gas spurt with into the air in cavity
It carries out blending and reaches required equivalent proportion.It should be noted that：It will into the air in air inlet fish mouth and the equivalent proportion of fuel oil
Control within the specific limits, make mixed gas can neither spontaneous combustion will not be tempered.
It refer to described in Fig. 5 and Fig. 6, the operation principle of combined burning room of the present invention is：It is passed through from the air of blower outlet
It is divided into three strands into combustion chamber after the deceleration supercharging of diffuser 2, is partly into the outer shroud of combustion chamber, is partly into combustion chamber
Inner ring, a part enter combustion chamber by the cyclone on head.Bypass road air-flow is divided into six parts：(1) cavity outside pre-combustion grade
Interior side-inlet enters outer cavity；(2) side-inlet enters outer cavity outside cavity outside pre-combustion grade；(3) into recessed outside pre-combustion grade
The mixed gas that certain equivalent proportion is formed in the air inlet fish mouth of chamber evaporation tube nozzle and with fuel oil is entered back into outer cavity；(4) from fire
Cooling hole on flame barrel enters in burner inner liner；(5) cut off mainstream into burner inner liner from the primary holes on burner inner liner and assist
Cyclone forms main combustion stage recirculating zone；(6) from the blending hole on burner inner liner into burner inner liner blending tune is carried out with high-temperature fuel gas
Save outlet temperature field；Interior circuit air-flow is divided into six parts：(1) side-inlet enters inner cavity out of pre-combustion grade inner cavity；(2) from
The outer side-inlet of pre-combustion grade inner cavity enters inner cavity；(3) in the air inlet fish mouth that tube nozzle is evaporated into pre-combustion grade inner cavity
And the mixed gas that certain equivalent proportion is formed with fuel oil is entered back into inner cavity；(4) burner inner liner is entered from the cooling hole on flame tube wall
In flame tube wall is cooled down；(5) cut off mainstream into burner inner liner from the primary holes on burner inner liner and assist cyclone shape
Into main combustion stage recirculating zone；(6) carry out blending into burner inner liner from the blending hole on burner inner liner with high-temperature fuel gas and adjust outlet temperature
Spend field.
With reference to shown in Fig. 5, in the shaft section without connection flame plate, i.e. mainstream flow area, from cavity inside air admission hole and cavity
Outside air admission hole enters the air of cavity, and stable pre-combustion grade recirculating zone is formed in cavity.Meanwhile it is steamed from pre-combustion grade (cavity)
The oil gas that hair tube nozzle mixes gas spurt ejection is blended with the air entered from air admission hole on the inside of cavity in cavity, forms certain model
The combustion mixture of equivalent proportion in enclosing.High-energy ignition sparking plug, in engine start, high-energy ignition are set on the outside of outer cavity
Electric spark of the sparking plug release with number Joule energy, combustion mixture is lighted, and is formed under the recirculating zone effect in cavity
Stable flame.With reference to shown in Fig. 6, join shaft section where flame plate, i.e. mainstream blocking shaft section, the combustion high temperature in outer cavity
Mixed air-flow is converged with the unburned mixed gas in inner cavity to connection flame plate and lights the unburned mixed gas of inner cavity.There was only cavity during small state
Fuel feeding, mainstream fuel feeding and the primary air formation mainstream combustion gas with passing through cyclone when big state, mainstream combustion gas is in concave-concave chamber
Wake flame and connection flame plate after the fixed incendiary source that is formed of high-temperature fuel gas under the action of ignite, after mainstream is ignited, from
Mainstream newly enters in mixed gas in mainstream recirculating zone, and cavity wake flame joins and stablizes burning under the collective effect of the high-temperature fuel gas after flame plate,
The high-temperature fuel gas in primary zone carries out blending outflow burner inner liner and further impulse turbine with dilution air.
Above example is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (8)
1. a kind of combined burning room, including diffuser (2), interior casing (3), outer casing (4), oil supply system, high-energy ignition sparking plug
And burner inner liner, the burner inner liner form the inside and outside circuit of combustion chamber with interior casing and outer casing；It is characterized in that, flame tube head
It is made of main combustion stage and pre-combustion grade；
The main combustion stage includes several level-one axial direction main combustion stage cyclones (11), Venturi tube (12) and main combustion stage fuel nozzle
(9), the level-one axial direction main combustion stage cyclone (11) is uniformly arranged on flame tube head centre, adjacent main combustion stage cyclone
(11) it is fixedly connected between by joining flame plate (26)；
The pre-combustion grade includes the outer cavity (16) of pre-combustion grade, pre-combustion grade inner cavity (17) and pre-combustion grade fuel nozzle (10), described
The outer cavity (16) of pre-combustion grade is to protrude the cavity formed by the flame tube wall for being located at the flame tube head on the outside of main combustion stage cyclone
Structure, the pre-combustion grade inner cavity (17) are to protrude shape by being located at the flame tube wall of the flame tube head on the inside of main combustion stage cyclone
Into cavity body structure；The outer cavity (16) of the pre-combustion grade and pre-combustion grade inner cavity (17) are by annulus that an axial cross section is straight line
Wall and an axial cross section form for arc ring wall one end integral type connection of arc, the annulus wall face main combustion stage eddy flow
Device and perpendicular to connection flame plate；
Several interior side-inlets are offered on the annulus wall of the outer cavity (16) of the pre-combustion grade and pre-combustion grade inner cavity (17)
(19,21) offer several outer side-inlets (18,20) on arc ring wall；
The high-energy ignition sparking plug is arranged on the outside of the outer cavity of pre-combustion grade.
2. a kind of combined burning room according to claim 1, which is characterized in that the pre-combustion grade fuel nozzle (10) is to steam
Send out tube nozzle.
3. a kind of combined burning room according to claim 2, which is characterized in that the evaporation tube nozzle is sprayed by direct-injection type
Mouth, air inlet fish mouth (13) and evaporation cavity (14) composition, the air inlet fish mouth (13) be with the integrated design of arc ring wall into fish
Mouth shape air inlet.
4. a kind of combined burning room according to claim 3, which is characterized in that the oil supply system includes pre-combustion grade fuel feeding
System, main combustion stage oil supply system and cyclone；The pre-combustion grade oil supply system includes：The outer cavity fuel manifold import of pre-combustion grade
(36), the outer cavity fuel manifold (6) of pre-combustion grade, the air inlet fish mouth (13) of pre-combustion grade evaporation tube nozzle, pre-combustion grade evaporation tubular type
Nozzle evaporation cavity (14), pre-combustion grade inner cavity fuel manifold import (37), pre-combustion grade inner cavity fuel manifold (7), pre-combustion grade are steamed
Hair tube nozzle mixes gas spurt (15)；Fuel oil sprays into pre-combustion grade evaporation tube nozzle air inlet fish mouth from simple nozzle and carries out one
Secondary atomization simultaneously carries out secondary-atomizing blending with being sheared into the air in pre-combustion grade evaporation tube nozzle, mixes gas and is evaporated in pre-combustion grade
Further evaporation mixing in tube nozzle evaporation cavity is evaporated with pre-combustion grade and evaporated from pre-combustion grade in the air inlet fish mouth of tube nozzle
Tube nozzle mixes to spray in gas spurt reaches required equivalent proportion with carrying out blending into the air in cavity.
A kind of 5. combined burning room according to claim 1, which is characterized in that interior side-inlet (the 19,21) distance
3 to 5 millimeters of cavity arc ring wall section, the outer side-inlet (18,20) export in axial position and main combustion stage cyclone (11)
It flushes.
6. a kind of combined burning room according to claim 1, which is characterized in that from the air of blower outlet through diffuser
Slow down and be divided into three strands into combustion chamber after being pressurized, the bypass road for being partly into combustion chamber, the inner ring for being partly into combustion chamber
Road, a part enter combustion chamber by the cyclone on head；
Bypass road air-flow is divided into six parts：(1) side-inlet enters outer cavity in cavity outside pre-combustion grade；(2) outside pre-combustion grade
The outer side-inlet of cavity enters outer cavity；(3) into the air inlet fish mouth of the outer cavity evaporation tube nozzle of pre-combustion grade and and fuel oil
The mixed gas for forming certain equivalent proportion is entered back into outer cavity；(4) enter from the cooling hole on flame tube wall in burner inner liner；(5) from
Into burner inner liner in primary holes on burner inner liner, cut off and assist to form main combustion stage recirculating zone；(6) from the blending hole on burner inner liner
It is middle to enter burner inner liner, it carries out blending with high-temperature fuel gas and adjusts outlet temperature field；
Interior circuit air-flow is divided into six parts：(1) side-inlet enters inner cavity out of pre-combustion grade inner cavity；(2) out of pre-combustion grade
The outer side-inlet of cavity enters inner cavity；(3) into pre-combustion grade inner cavity evaporation tube nozzle air inlet fish mouth in and and fuel oil
The mixed gas for forming certain equivalent proportion is entered back into inner cavity；(4) enter from the cooling hole on flame tube wall in burner inner liner to flame
Barrel is cooled down；(5) cut off into burner inner liner from the primary holes on burner inner liner and assist to form main combustion stage recirculating zone；(6)
Into burner inner liner from the blending hole on burner inner liner, carry out blending with high-temperature fuel gas and adjust outlet temperature field.
A kind of 7. combined burning room according to claim 1, which is characterized in that main combustion stage cyclone (11) the blade peace
Angle is filled between 30 degree to 45 degree, blade quantity is between 8 to 12, and swirling number is between 0.45 to 0.8.
8. a kind of combined burning room according to claim 1, which is characterized in that the combined burning room is loopful shape knot
Structure.
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| CN201610361623.0A CN105953265B (en) | 2016-05-27 | 2016-05-27 | A kind of combined burning room |
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| CN201610361623.0A CN105953265B (en) | 2016-05-27 | 2016-05-27 | A kind of combined burning room |
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| CN105953265B true CN105953265B (en) | 2018-06-01 |
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