CN108916911B - A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure - Google Patents
A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure Download PDFInfo
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- CN108916911B CN108916911B CN201810391328.9A CN201810391328A CN108916911B CN 108916911 B CN108916911 B CN 108916911B CN 201810391328 A CN201810391328 A CN 201810391328A CN 108916911 B CN108916911 B CN 108916911B
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- combustion grade
- combustion
- diaphragm plate
- oil
- working connection
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/16—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration with devices inside the flame tube or the combustion chamber to influence the air or gas flow
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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
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
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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
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
Abstract
The invention discloses a kind of pre-combustion grades to be classified low emission combustor head using the center of pre- diaphragm plate structure, and the head is using center classification, the design of pre-combustion grade double oil circuits.Pre-combustion grade double oil circuits include working connection and auxiliary oil circuit.When fuel flow is smaller, only pre-combustion grade auxiliary oil circuit provides fuel oil, so that nozzle atomization quality with higher under small operating condition.When fuel flow is larger, pre-combustion grade working connection and auxiliary oil circuit provide fuel oil simultaneously.The fuel oil of pre-combustion grade working connection supply is injected in pre- diaphragm plate inner surface by pre-combustion grade working connection spray-hole, forms oil film.Occur under the action of outer air swirl including the oil film broken, it is ensured that preferable atomizing effect.Pre-combustion grade double oil circuits design of the invention can make nozzle guarantee higher atomization quality within the scope of wider working condition pressure, be conducive to the full combustion of fuel oil in a combustion chamber, reduce the production quantity of pollutant.
Description
Technical field
The present invention relates to the technical field on low emission combustor head, in particular to a kind of pre-combustion grade uses pre- diaphragm plate structure
Center be classified low emission combustor head.
Background technique
Civil engine, which comes into operation, must satisfy air worthiness regulation, and to the requirement of pollutant emission in air worthiness regulation
It is higher and higher.According to the regulation (ICAO) of International Civil Aviation Organization, carbon monoxide (CO), unburned hydrocarbon (UHC), smolder (Smoke),
Nitrogen oxides (NOx) is the major pollutants that aero-engine generates.Wherein, CO and UHC is mainly largely created on low-power shape
State, Smoke and NOx are mainly generated in high power state.The core for reducing disposal of pollutants is to control the uniformity of temperature and temperature,
Lean premixed preevaporated (low emission) combustion chamber is common low pollution combustor.
Swirl atomizer is pressure atomization type nozzle, it makes fuel-oil atmozation by the pressure of fuel oil.Into the combustion of swirl atomizer
Oil does tangential motion, under the influence of centrifugal force, forms hollow oil film in jet expansion.In the common of surface wave and aerodynamic force etc.
Under effect, Oil Film Instability forms mist of oil.Adjusting to guarantee fuel oil while being limited to the maximum pressure of fuel oil than range, is centrifuged
The design of nozzle is often based upon biggish fuel flow.And when fuel flow is smaller, the atomizing effect of fuel oil is poor, efficiency of combustion
Low, fluff pulp is high.
The present invention devises a kind of pre-combustion grade using the center classification low emission combustor head of pre- diaphragm plate structure.This head
Feature is that pre-combustion grade oil circuit is divided into working connection and auxiliary oil circuit.When fuel flow is smaller, only pre-combustion grade auxiliary oil circuit provides fuel oil.
When fuel flow is larger, pre-combustion grade working connection and auxiliary oil circuit provide fuel oil simultaneously.The design of pre-combustion grade double oil circuits can make nozzle exist
Guarantee higher atomization quality within the scope of wider working condition pressure.
Summary of the invention
The technical problem to be solved by the present invention is needing to guarantee to fire under different operating conditions to achieve the purpose that combustion with reduced pollutants
The atomization quality of oil.The design of conventional centrifugal nozzle is often based upon biggish fuel flow, and when fuel flow is smaller, fuel oil
Atomizing effect it is poor, efficiency of combustion is low, and fluff pulp is high.
The technical solution adopted by the present invention are as follows: a kind of pre-combustion grade uses the center classification low emission combustor of pre- diaphragm plate structure
Head, using center classification, pre-combustion grade double oil circuits structure, mainly by pre-combustion grade beam hanger, pre-combustion grade swirl atomizer, pre- diaphragm plate,
Pre-combustion grade cyclone, interstage section, main combustion stage cyclone, main combustion stage oil circuit connection part, main combustion stage outer ring, anti-backfire ring are constituted；Its
In, pre-combustion grade beam hanger is formed by 3D printing, and internal pre-combustion grade double oil circuits are pre-combustion grade working connection and pre-combustion grade auxiliary oil circuit respectively,
Be distributed with pre-combustion grade working connection spray-hole on the wall surface of pre-combustion grade beam hanger end, at the same the internal screw thread of pre-combustion grade beam hanger end processing with
The external screw thread cooperation processed on pre-combustion grade swirl atomizer, composition described above pre-combustion grade oil circuit；Pre- diaphragm plate is welded on pre-combustion grade cyclone
On, and be integrated with interstage section welded connecting；Interstage section has screw thread for pre-combustion grade and main combustion stage flame, outer diameter to be isolated；
The main combustion stage cyclone of machined completion, main combustion stage oil circuit connection part, main combustion stage outer ring, anti-backfire ring are by being welded as one
Body forms main combustion stage oil pocket between main combustion stage cyclone and main combustion stage oil circuit connection part；Main combustion stage oil circuit connection part has interior
Screw thread is threadedly coupled with interstage section, forms head body.
Wherein, pre-combustion grade working connection and pre-combustion grade auxiliary oil circuit are contained in pre-combustion grade beam hanger, wherein pre-combustion grade working connection is effective
Circulation area is in 10~200mm2Between, pre-combustion grade auxiliary oil circuit valid circulation area is in 5~100mm2Between；Pre-combustion grade working connection
The fuel oil of supply is injected in pre- diaphragm plate inner surface by pre-combustion grade working connection spray-hole, forms oil film；The oil film is in inner air and outer air
Occur under the action of eddy flow broken, it is ensured that preferable atomizing effect；Pre-combustion grade auxiliary oil circuit supply fuel oil by pre-combustion grade from
Heart nozzle ejects oil droplet；Oil droplet is further blended with air swirl, is flowed to and is participated in burning in burner inner liner.
Wherein, pre-combustion grade working connection nozzle inside diameter is 0.4~1.2mm, and spray angle is 45~90 °, circumferentially distributed number
Amount is 6~24, can individually or simultaneously be distributed in different axial positions；Pre-combustion grade working connection spray-hole cross-sectional area can be with
It remains unchanged, gradually taper up or expands；When pre-combustion grade fuel flow is smaller, only pre-combustion grade auxiliary oil circuit supplies fuel oil, so that
Nozzle atomization quality with higher under small operating condition；When fuel flow is larger, in addition to pre-combustion grade auxiliary oil circuit supplies fuel oil, in advance
Combustion grade working connection is also supplied with fuel oil；The ratio between pre-combustion grade auxiliary oil circuit fuel flow and pre-combustion grade working connection fuel flow are 1~20；In advance
The fuel oil of combustion grade working connection supply is injected in pre- diaphragm plate surface by pre-combustion grade working connection spray-hole；Under big working condition, tool
There is higher atomization quality；So that nozzle can be made to guarantee within the scope of wider working condition pressure is higher for the design of pre-combustion grade double oil circuits
Atomization quality.
Wherein, pre-combustion grade working connection flow number is 5~15, and pre-combustion grade auxiliary oil circuit flow number is 1~5；In conceptual design,
Guarantee that pre-combustion grade working connection and pre-combustion grade auxiliary oil circuit flow number match, to reach the optimal effectiveness of atomization.
Wherein, pre- diaphragm plate import internal diameter is 18~24mm, and outer diameter is 19~28mm, can design pre- diaphragm plate inner air and outer air stream
The distribution of amount；Pre- diaphragm plate exit inside diameter is 10~14mm, and outlet outer diameter is 11~18mm；Change pre- diaphragm plate inner air and outer air stream
Speed, to adapt to different adjustment than range, flow field structure after changing nozzle, and then change atomization and mixing effect.
Wherein, pre- diaphragm plate inlet and outlet area contraction ratio is 0.2~0.6；Pre- diaphragm plate outlet flange angle is -45 °~60 °；
Pre- diaphragm plate surfaces externally and internally is airflow design, reduces the resistance of air flowing, it is therefore prevented that the generation of flow separation ensure that good
Good atomizing effect.
Wherein, pre- diaphragm plate is 8~15mm along axial length, results in the variation of pre- diaphragm plate exit oil film thickness, into
And the shattering process of oil film is changed, atomization and mixing effect are impacted.
Wherein, in conceptual design, guarantee pre-combustion grade working connection spray-hole size, quantity, angle and pre- diaphragm plate length, into
Outlet diameter, outlet flange angle match, to strengthen atomization process.
The present invention has the advantage that as follows compared with prior art:
(1) atomizing effect is good under different fuel flows.The head is designed using pre-combustion grade double oil circuits structure, in fuel oil
When flow is smaller, only pre-combustion grade auxiliary oil circuit provides fuel oil, so that nozzle atomization quality with higher under small operating condition.It is firing
When oil stream amount is larger, pre-combustion grade working connection and auxiliary oil circuit provide fuel oil simultaneously.The fuel oil of pre-combustion grade working connection supply passes through pre-burning
Grade working connection spray-hole is injected in pre- diaphragm plate inner surface, forms oil film.Occur under the action of outer air swirl including the oil film broken
It is broken, it is ensured that preferable atomizing effect.
(2) structural variability is flexible.Pre-combustion grade working connection injection hole number, size, angle can flexibly change, Ke Yidan
Solely or simultaneously it is distributed in different axial positions.Pre- diaphragm plate inlet and outlet diameter and length can also flexibly change, good to guarantee
Atomizing effect.
(3) low in cost.Pre- diaphragm plate structure is simple, and class is produced by machining mode, the company with pre-combustion grade cyclone
Mode is connect as welding, low production cost.
Detailed description of the invention
Fig. 1 is the structural representation that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure
Figure；
Fig. 2 is the positive equal side views of pre-combustion grade of the invention using the center classification low emission combustor head of pre- diaphragm plate structure
Figure；
Fig. 3 is the schematic diagram that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure,
Wherein, Fig. 3 (a) is left view, and Fig. 3 (b) is rearview, and Fig. 3 (c) is front view；
Fig. 4 is the pre-combustion grade master that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure
The just equal side views of oil circuit spray-hole, wherein Fig. 4 (a) is benchmark scheme, and Fig. 4 (b) is variable orifice angular arrangements, and Fig. 4 (c) is variable orifice
Diameter scheme, Fig. 4 (d) are variable orifice quantity scheme；
Fig. 5 is the pre-combustion grade master that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure
Oil circuit spray-hole cross-sectional view, wherein Fig. 5 (a) is benchmark scheme, and Fig. 5 (b) is variable orifice angular arrangements, and Fig. 5 (c) is variable orifice diameter side
Case, Fig. 5 (d) are variable orifice quantity scheme；
Fig. 6 is the pre- diaphragm plate of change that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure
Length schematic diagram, wherein Fig. 6 (a) is benchmark scheme, and Fig. 6 (b) is to become pre- diaphragm plate length scheme；
Fig. 7 is the pre- diaphragm plate knot that pre-combustion grade of the invention is classified low emission combustor head using the center of pre- diaphragm plate structure
Composition, wherein Fig. 7 (a), which is positive, waits side views, and Fig. 7 (b) is front view, and Fig. 7 (c) is cross-sectional view；
In figure: 1 is pre-combustion grade beam hanger, and 2 be pre-combustion grade swirl atomizer, and 3 be pre- diaphragm plate, and 4 be pre-combustion grade cyclone, and 5 be grade
Between section, 6 be main combustion stage cyclone, 7 be main combustion stage oil circuit connection part, 8 be main combustion stage outer ring, 9 be anti-backfire ring, 10 be pre-combustion grade
Working connection, 11 be pre-combustion grade auxiliary oil circuit, and 12 be pre-combustion grade working connection spray-hole, and 13 be main combustion stage oil pocket.
Specific embodiment
With reference to the accompanying drawing and the present invention is discussed in detail in specific embodiment:
As shown in Figure 1, Figure 2, Figure 3 shows, the center of pre- diaphragm plate structure is used for a kind of pre-combustion grade described in the embodiment of the present invention
It is classified low emission combustor head, using the design feature of center classification and pre-combustion grade double oil circuits, mainly by pre-combustion grade beam hanger
1, pre-combustion grade swirl atomizer 2, pre- diaphragm plate 3, pre-combustion grade cyclone 4, interstage section 5, main combustion stage cyclone 6, main combustion stage oil circuit connection
Part 7, main combustion stage outer ring 8, anti-backfire ring 9 are constituted.Pre- diaphragm plate 3 is welded on pre-combustion grade cyclone 4, and is welded and connected with interstage section 5
It is connected in one.Interstage section 5 has screw thread for pre-combustion grade and main combustion stage flame, outer diameter to be isolated.The master of machined completion
Combustion grade cyclone 6, main combustion stage oil circuit connection part 7, main combustion stage outer ring 8, anti-backfire ring 9 are revolved by being welded as a whole in main combustion stage
It flows and forms main combustion stage oil pocket 13 between device 6 and main combustion stage oil circuit connection part 7.Main combustion stage oil circuit connection part 7 has internal screw thread, with grade
Between section 5 be threadedly coupled, form head body.Pre-combustion grade beam hanger 1 is inserted into pre-combustion grade cyclone 4, double inside pre-combustion grade beam hanger
Oil circuit is pre-combustion grade working connection 10 and pre-combustion grade auxiliary oil circuit 11 respectively.Pre-combustion grade master is distributed on 1 end wall surface of pre-combustion grade beam hanger
Oil circuit spray-hole 12, while the external screw thread processed on the internal screw thread and pre-combustion grade swirl atomizer 2 of 1 end of pre-combustion grade beam hanger processing is matched
It closes.The mist of oil and pre- 3 inner air of diaphragm plate ejected from pre-combustion grade swirl atomizer 2 blends.From pre-combustion grade working connection spray-hole 12
The fuel oil ejected impacts pre- 3 inner surface of diaphragm plate, forms oil film.The oil film is sent out under the action of pre- 3 inner air and outer air eddy flow of diaphragm plate
It is raw broken, oil droplet is formed, is further blended with air.Two parts fuel oil burns with air swirl to flowing in burner inner liner,
Form diffusion flame.Fuel oil in main combustion stage oil pocket 13 is sprayed by the hole on main combustion stage blade, is transported with air downstream
Constantly blending, forms uniform gas mixture, burns to flowing in burner inner liner, form partly-premixed fire during dynamic
Flame.Pre-combustion grade formed above is classified low emission combustor head using the center of pre- diaphragm plate structure, and pre-combustion grade is diffusion flame, main
Combustion grade is partly-premixed flame.
Pre-combustion grade working connection valid circulation area is in 10~80mm2Between, pre-combustion grade auxiliary oil circuit valid circulation area 1~
20mm2Between.The fuel oil of pre-combustion grade working connection supply is injected in pre- diaphragm plate inner surface by pre-combustion grade working connection spray-hole, is formed
Oil film.Occur under the action of outer air swirl including the oil film broken, it is ensured that preferable atomizing effect.Pre-combustion grade auxiliary oil circuit supplies
The fuel oil given ejects oil droplet by pre-combustion grade swirl atomizer.Oil droplet is further blended with air swirl, is flowed in burner inner liner
Participate in burning.
When pre-combustion grade fuel flow is smaller, only pre-combustion grade auxiliary oil circuit supplies fuel oil, so that nozzle has under small operating condition
There is higher atomization quality.When fuel flow is larger, in addition to pre-combustion grade auxiliary oil circuit supplies fuel oil, pre-combustion grade working connection is also supplied with
Fuel oil.The ratio between pre-combustion grade auxiliary oil circuit fuel flow and pre-combustion grade working connection fuel flow are 1~20.The supply of pre-combustion grade working connection
Fuel oil is injected in pre- diaphragm plate surface by pre-combustion grade working connection spray-hole.Pre-combustion grade working connection nozzle inside diameter be 0.4~
1.2mm, spray angle are 45~90 °, and circumferentially distributed quantity is 6~24, can individually or simultaneously be distributed in different axial directions
Position.Pre-combustion grade working connection spray-hole cross-sectional area can be remained unchanged, gradually tapers up or be expanded.Under big working condition, tool
There is higher atomization quality.So that nozzle can be made to guarantee within the scope of wider working condition pressure is higher for the design of pre-combustion grade double oil circuits
Atomization quality.Pre-combustion grade working connection flow number is 5~15, and pre-combustion grade auxiliary oil circuit flow number is 1~5.In conceptual design, guarantee
Pre-combustion grade working connection and pre-combustion grade auxiliary oil circuit flow number match, to reach the optimal effectiveness of atomization.
As shown in Figure 4, Figure 5, it is processed on the internal screw thread and pre-combustion grade swirl atomizer 2 of the processing of 1 end of pre-combustion grade beam hanger outer
It is threadedly engaged, pre-combustion grade working connection spray-hole 12 is distributed on 1 end wall surface of pre-combustion grade beam hanger.Pre-combustion grade working connection spray-hole 12
Size, angle, quantity can flexibly change so that design scheme can make nozzle guarantee within the scope of wider working condition pressure compared with
High atomization quality ensure that fuel oil full combustion, reduce the production quantity of pollutant.A is benchmark scheme, and injection hole number is
12, diameter 0.5mm, 90 ° of spray angle；B is variable orifice angular arrangements, wherein injection hole number is 12, diameter 0.5mm, spray
45 ° of firing angle degree；C is to become aperture schemes, and injection hole number is 12, diameter 1.0mm, 90 ° of spray angle；D is variable orifice quantity side
Case, injection hole number are 24, diameter 0.5mm, 90 ° of spray angle；
As shown in fig. 6, pre-combustion grade cyclone 4 is machined with slot on a certain circumference, pre- diaphragm plate 3 is placed on pre-combustion grade cyclone
In 4 circumferential slots, it is linked together by welding.Pre-combustion grade beam hanger 1 is by 4 center of pre-combustion grade cyclone, by pre-combustion grade swirl atomizer 2
It protrudes into pre- diaphragm plate 3, ensure that the fuel oil of the injection of pre-combustion grade working connection spray-hole 12 can fall in the inner surface of pre- diaphragm plate 3.In advance
Diaphragm plate 3 can change along axial length, and a is benchmark scheme, axial length 13mm；B is to become pre- diaphragm plate length scheme, axial long
Spend 8mm.
As shown in fig. 7, pre- 3 inner and outer surfaces of diaphragm plate are smooth curved surface, it is therefore prevented that gas is along inner and outer surfaces flow process
It is middle to separate.The oil film that pre- 3 inner surface of diaphragm plate is formed, gradually moves to outlet, unstability under the action of inner and outer surfaces air
Form liquid mist.It can change pre- diaphragm plate 3 and import and export diameter, and then change air swirl along the movement of pre- 3 inner and outer surfaces of diaphragm plate,
The design takes full advantage of the Aerodynamic force action of air swirl, and no matter how fuel flow changes, the equal energy of the atomizing effect of fuel oil
Keep higher level.
Pre- diaphragm plate import internal diameter is 18~24mm, and outer diameter is 19~28mm, can design pre- diaphragm plate inner air and outer air flow
Distribution.Pre- diaphragm plate exit inside diameter is 10~14mm, and outlet outer diameter is 11~18mm.Pre- diaphragm plate inner air and outer air flow velocity is changed, with
Different adjustment is adapted to than range, the flow field structure after changing nozzle, and then change atomization and mixing effect.Pre- diaphragm plate imports and exports face
Product shrinkage ratio is 0.2~0.6.Pre- diaphragm plate outlet flange angle is -45 °~60 °；Pre- diaphragm plate surfaces externally and internally is airflow design,
Reduce the resistance of air flowing, it is therefore prevented that the generation of flow separation ensure that good atomizing effect.Pre- diaphragm plate is along axial direction
Length is 8~15mm, the variation of pre- diaphragm plate exit oil film thickness is resulted in, and then change the shattering process of oil film, to mist
Change and mixing effect impacts.
In conceptual design, guarantee pre-combustion grade working connection spray-hole size, quantity, angle and pre- diaphragm plate length, inlet and outlet
Diameter, outlet flange angle match, to strengthen atomization process.
Claims (7)
1. a kind of pre-combustion grade is classified low emission combustor head using the center of pre- diaphragm plate structure, it is characterised in that: use center
It is classified, the structure of pre-combustion grade double oil circuits, mainly by pre-combustion grade beam hanger (1), pre-combustion grade swirl atomizer (2), pre- diaphragm plate (3), pre-burning
Grade cyclone (4), main combustion stage cyclone (6), main combustion stage oil circuit connection part (7), main combustion stage outer ring (8), is prevented back at interstage section (5)
Fire ring (9) is constituted；Wherein, pre-combustion grade beam hanger (1) is formed by 3D printing, and internal pre-combustion grade double oil circuits are the main oil of pre-combustion grade respectively
Pre-combustion grade working connection spray-hole (12) is distributed on the wall surface of pre-combustion grade beam hanger (1) end in road (10) and pre-combustion grade auxiliary oil circuit (11),
The external screw thread processed on the internal screw thread of pre-combustion grade beam hanger (1) end processing simultaneously and pre-combustion grade swirl atomizer (2) cooperates, pre-combustion grade
Working connection (10), pre-combustion grade auxiliary oil circuit (11) and pre-combustion grade working connection spray-hole (12) form pre-combustion grade oil circuit；Pre- diaphragm plate (3) weldering
It connects on pre-combustion grade cyclone (4), and is welded to connect and is integrated with interstage section (5)；Interstage section (5) is for being isolated pre-combustion grade and master
Grade flame is fired, outer diameter has screw thread；The main combustion stage cyclone (6) of machined completion, main combustion stage oil circuit connection part (7),
Main combustion stage outer ring (8), anti-backfire ring (9) are by being welded as a whole, in main combustion stage cyclone (6) and main combustion stage oil circuit connection part
(7) main combustion stage oil pocket (13) are formed between；Main combustion stage oil circuit connection part (7) has internal screw thread, is threadedly coupled with interstage section (5),
Form head body.
2. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: containing pre-combustion grade working connection (10) and pre-combustion grade auxiliary oil circuit (11), wherein pre-combustion grade master in pre-combustion grade beam hanger (1)
Oil circuit (10) valid circulation area is in 10~200mm2Between, pre-combustion grade auxiliary oil circuit (11) valid circulation area is in 5~100mm2It
Between；The fuel oil of pre-combustion grade working connection (10) supply is injected in pre- diaphragm plate (3) inner surface by pre-combustion grade working connection spray-hole (12),
Form oil film；Occur under the action of outer air swirl including the oil film broken, it is ensured that preferable atomizing effect；The secondary oil of pre-combustion grade
The fuel oil of road (11) supply ejects oil droplet by pre-combustion grade swirl atomizer (2)；Oil droplet is further blended with air swirl, flowing
Burning is participated in into burner inner liner.
3. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: pre-combustion grade working connection spray-hole (12) diameter is 0.4~1.2mm, spray angle is 45~90 °, circumferentially distributed
Quantity is 6~24, can individually or simultaneously be distributed in different axial positions；Pre-combustion grade working connection spray-hole (12) cross section
Product can be remained unchanged, gradually tapers up or be expanded；When pre-combustion grade fuel flow is smaller, only pre-combustion grade auxiliary oil circuit (11) is supplied
Fuel oil, so that nozzle atomization quality with higher under small operating condition；When fuel flow is larger, remove pre-combustion grade auxiliary oil circuit (11)
It supplies outside fuel oil, pre-combustion grade working connection (10) is also supplied with fuel oil；Pre-combustion grade auxiliary oil circuit (11) fuel flow and pre-combustion grade working connection
(10) the ratio between fuel flow is 1~20；The fuel oil of pre-combustion grade working connection (10) supply passes through pre-combustion grade working connection spray-hole (12)
It is injected in pre- diaphragm plate (3) surface；Under big working condition, atomization quality with higher；So the design of pre-combustion grade double oil circuits can
Nozzle is set to guarantee higher atomization quality within the scope of wider working condition pressure.
4. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: pre- diaphragm plate (3) import internal diameter is 18~24mm, outer diameter is 19~28mm, can design pre- diaphragm plate (3) interior outer space
The distribution of throughput；Pre- diaphragm plate (3) exit inside diameter is 10~14mm, and outlet outer diameter is 11~18mm；It changes in pre- diaphragm plate (3)
Outer air velocity, to adapt to different adjustment than range, flow field structure after changing nozzle, and then change atomization and mixing effect.
5. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: pre- diaphragm plate (3) inlet and outlet area contraction ratio is 0.2~0.6；Pre- diaphragm plate (3) outlet flange angle is -45 °~
60°；Pre- diaphragm plate (3) surfaces externally and internally is airflow design, reduces the resistance of air flowing, it is therefore prevented that the generation of flow separation,
It ensure that good atomizing effect.
6. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: pre- diaphragm plate (3) is 8~15mm along axial length, the change of pre- diaphragm plate (3) exit oil film thickness is resulted in
Change, and then change the shattering process of oil film, atomization and mixing effect are impacted.
7. a kind of pre-combustion grade according to claim 1 is classified low emission combustor head using the center of pre- diaphragm plate structure,
It is characterized by: guaranteeing pre-combustion grade working connection spray-hole (12) size, quantity, angle and pre- diaphragm plate length, inlet and outlet diameter, going out
Mouth flange angle matches, to strengthen atomization process.
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| CN201810391328.9A CN108916911B (en) | 2018-04-27 | 2018-04-27 | A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure |
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| CN201810391328.9A CN108916911B (en) | 2018-04-27 | 2018-04-27 | A kind of pre-combustion grade uses the center classification low emission combustor head of pre- diaphragm plate structure |
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| CN108916911B true CN108916911B (en) | 2019-12-03 |
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| CN113932253B (en) * | 2020-06-29 | 2022-10-18 | 中国航发商用航空发动机有限责任公司 | Combustion chamber head, combustion chamber, gas turbine engine, and combustion control method |
| CN114087627B (en) * | 2021-11-11 | 2023-01-20 | 中国航发贵州黎阳航空动力有限公司 | Fuel manifold nozzle of micro aeroengine and oil mixing test method thereof |
| CN114636171B (en) * | 2022-02-18 | 2023-01-17 | 北京航空航天大学 | Pre-combustion-stage double-oil-way pre-film type air atomizing nozzle |
| CN115854385B (en) * | 2023-01-04 | 2023-07-14 | 哈尔滨工程大学 | Combustion chamber head structure with adjustable nozzle position |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN102200291A (en) * | 2011-03-29 | 2011-09-28 | 北京航空航天大学 | Pneumatic primary level graded low-pollution combustion chamber |
| CN103343985A (en) * | 2013-06-21 | 2013-10-09 | 北京航空航天大学 | Double-pre-film pneumatic nebulization low pollution combustor head structure |
| CN203928003U (en) * | 2014-04-30 | 2014-11-05 | 中航商用航空发动机有限责任公司 | Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center |
| CN104456627A (en) * | 2014-10-27 | 2015-03-25 | 北京航空航天大学 | Lean oil premixing and pre-evaporating combustion chamber head structure with cyclone/pre-film plate integrated primary combustion stage |
| EP3088802A1 (en) * | 2015-04-29 | 2016-11-02 | General Electric Technology GmbH | Nozzle for a gas turbine combustor |
| US9739161B2 (en) * | 2013-02-27 | 2017-08-22 | Rolls-Royce Plc | Vaned structure and a method of manufacturing a vaned structure |
-
2018
- 2018-04-27 CN CN201810391328.9A patent/CN108916911B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN102200291A (en) * | 2011-03-29 | 2011-09-28 | 北京航空航天大学 | Pneumatic primary level graded low-pollution combustion chamber |
| US9739161B2 (en) * | 2013-02-27 | 2017-08-22 | Rolls-Royce Plc | Vaned structure and a method of manufacturing a vaned structure |
| CN103343985A (en) * | 2013-06-21 | 2013-10-09 | 北京航空航天大学 | Double-pre-film pneumatic nebulization low pollution combustor head structure |
| CN203928003U (en) * | 2014-04-30 | 2014-11-05 | 中航商用航空发动机有限责任公司 | Be applied to the fuel nozzle of fractional combustion chamber, aero-engine center |
| CN104456627A (en) * | 2014-10-27 | 2015-03-25 | 北京航空航天大学 | Lean oil premixing and pre-evaporating combustion chamber head structure with cyclone/pre-film plate integrated primary combustion stage |
| EP3088802A1 (en) * | 2015-04-29 | 2016-11-02 | General Electric Technology GmbH | Nozzle for a gas turbine combustor |
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| CN108916911A (en) | 2018-11-30 |
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