CN105972640A - Premixing and pre-evaporation combustion chamber - Google Patents
Premixing and pre-evaporation combustion chamber Download PDFInfo
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- CN105972640A CN105972640A CN201610300714.3A CN201610300714A CN105972640A CN 105972640 A CN105972640 A CN 105972640A CN 201610300714 A CN201610300714 A CN 201610300714A CN 105972640 A CN105972640 A CN 105972640A
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- oil
- wall surface
- combustion
- expansion segment
- upper wall
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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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention provides a premixing and pre-evaporation combustion chamber. On the basis of an original primary combustion level oil cavity structure, convergence and expansion sections are added to the upper wall surface close to primary combustion level air, and a curve section is added to the lower wall surface close to pre-combustion level air. An extended oil cavity is fully roasted by pre-combustion level flames, fuel is fully heated inside the oil cavity to become oil vapor, then the oil vapor is ejected via small oil spray holes located in the expansion section of the upper wall surface of the oil cavity, and the oil vapor and air entering from a primary combustion level swirler form premixed gas which is mixed evenly. The combustion efficiency can be effectively improved. Besides, the premixing time is short, and the premixing section is short, so that spontaneous combustion and backfire can also be effectively avoided. The chamber has the advantages that on the basis of a twin annular premixing swirler (TAPS) geometric model, the primary combustion level oil cavity is reasonably changed, and the direct ejection type small nozzle holes are reasonably formed, so that the combustion efficiency is effectively improved, and spontaneous combustion and backfire are effectively avoided.
Description
Technical field
The invention belongs to gas-turbine unit field, relate to a kind of premix and pre-evaporation combustion chamber.
Background technology
International Civil Aviation Organization has just promulgated " environment protectment protection " and " aero engine emissions " regulations in the eighties,
And constantly revise perfect, have started at present perform CAEP8 discharge standard.Ge great aero-engine company and research institution
All studying as important topic using controlling pollutant emission, wherein low emissions combustion technology is civil engine
One of most important research contents.Owing to disposal of pollutants is the Airworthiness Certification Compulsory Feature to civil aircraft electromotor, American-European
The international well-known aero-engine company of Ji Jia for the severeest emission request, implement advanced civilian electromotor
Research plan, has grasped the key technology of low emission combustor.The combustor that GE company develops uses up-to-date dicyclo pre-
DL stream (TAPS) combustion technology, has been used on Leap-X electromotor, its NOXDisposal of pollutants is lower than CAEP6 standard
47.7%.PW company uses the TALON X combustor of RQL technology development on PW1000G electromotor, it is contemplated that NOXDirty
Dye discharge is lower by 40% than CAEP6 standard.
NOXIt is one of aeroengine combustor buring room designer pollutant of needing emphasis to consider, in aero-engine,
NOXMainly determined by combustion zone flame temperature.Have low pollution combustor at present and begin with lean premixed preevaporated technology
Ensure that the equivalent proportion of combustion zone, in the range of 0.5～0.65, effectively controls flame temperature thus reduces NOXGeneration.
Combustor generally its premix section using this technology is longer, spontaneous combustion and tempering easily occurs, and reduces the length of premix section
Premixing effect then can be made bad, and air-fuel mixture is uneven.Traditional combustor uses rich oil head design, combustion zone
Equivalent proportion is about 1.0, but this combustion system cannot reduce the discharge of pollutant, particularly NOXGrowing amount.
Present invention spontaneous combustion to be prevented and tempering while ensureing premixing effect, then need pre-combustion grade to use swirl atomizer,
Main combustion stage uses lean premixed preevaporated mixed combustion mode.
Summary of the invention
The technical problem to be solved is to propose a kind of premix and pre-evaporation combustion chamber.Compared with prior art, originally
The advantage of invention is on the basis of TAPS geometric model, reasonably changes main combustion stage oil pocket, both at oil pocket upper wall
Face increases convergence expansion segment, makes the air velocity come in from main combustion stage cyclone increase；Lower wall surface increases curved section, makes
Fuel oil inside oil pocket preferably receives the heat of pre-combustion grade flame, becomes oil vapour；Little plus reasonably opening simple nozzle
Hole, makes oil vapour fully premix with main combustion stage air, can be effectively improved efficiency of combustion, and owing to premix section is short,
Spontaneous combustion and tempering can be effectively prevented from.
Technical scheme
It is an object of the invention to provide a kind of premix and pre-evaporation combustion chamber.
The object of the present invention is achieved like this:
A kind of premix and pre-evaporation combustion chamber, including distribution form and the distribution mode of oil pocket expansion segment oil spit hole of oil pocket.
It is characterized in that: based on former main combustion stage oil pocket form, add convergence expansion segment at it near the upper wall surface of main combustion stage air,
Curved section is added near the lower wall surface of pre-combustion grade air at it.Oil pocket after extension is fully toasted by pre-combustion grade flame, combustion
Oil is fully heated inside oil pocket, becomes oil vapour, then penetrates from the oil spit hole being positioned at oil pocket upper wall surface expansion segment.
Described oil pocket upper wall surface, it is characterised in that: after the upper wall surface straightway of crude oil chamber, add expansion segment and converging portion,
Expansion segment is consistent, between 0.7mm～1.5mm with crude oil cavity wall face thickness with the wall thickness of converging portion.Expansion segment and
The total length of converging portion is between 15mm～20mm, and expansion segment expansion angle is between 10 °～35 °, and converging portion is restrained
Angle is between 10 °～35 °.
Described oil pocket lower wall surface, it is characterised in that: after the lower wall surface straightway of crude oil chamber, add curved section, curved section wall
Face thickness is consistent, between 0.7mm～1.5mm with crude oil cavity wall face thickness.The total length of curved section and upper wall surface expansion
Section is consistent with converging portion total length, between 15mm～20mm.The form of curved section is convex curve, and sweep exists
Between 12mm～20mm.
The described oil spit hole being positioned at oil pocket upper wall surface expansion segment, it is characterised in that: orifice region scope is according on oil pocket
Wall expansion segment determines, the magnitude range of the diameter of institute's perforate is 0.5～2mm, and opened circular hole row is 1～6 rows, institute
Fork row or the arrangement mode of in-line arrangement, the optional excursion of its trestle column can be taked in the hole opened when row is more than a row
For minimum-value aperture size 1～10 times.
This premix and pre-evaporation combustion chamber, advantage is on the basis of TAPS geometric model, by main combustion stage oil pocket
Reasonably change, add and reasonably open simple nozzle aperture, be effectively improved efficiency of combustion, and effectively keep away
Exempt from spontaneous combustion and tempering.And structure design is simple, feasibility is high, has the application prospect that can not look down upon.
Accompanying drawing explanation
Fig. 1: premix and pre-evaporation combustion chamber schematic diagram
Fig. 2: premix and pre-evaporation combustion chamber sectional view
Fig. 3: head sectional view
1-pre-combustion grade twin-stage axial swirler 2-main combustion stage single-stage axial swirler 3-main combustion stage oil pocket 4-in Fig. 1
Head of combustion chamber wall 5-head of combustion chamber Cooling Holes
1-pre-combustion grade twin-stage axial swirler 2-main combustion stage single-stage axial swirler 3-main combustion stage oil pocket 4-in Fig. 2
Oil spit hole
1-pre-combustion grade twin-stage axial swirler 2-main combustion stage single-stage axial swirler 3-main combustion stage oil pocket 4-in Fig. 3
Main combustion stage oil pocket lower wall surface former straightway 5-main combustion stage oil pocket lower wall surface former broken line 6-main combustion stage oil pocket lower wall surface is new
Increasing curved section 7-oil pocket end points 8-main combustion stage oil pocket upper wall surface increases expansion segment 9-main combustion stage oil pocket upper wall surface newly and increases newly
Converging portion 10-main combustion stage oil pocket upper wall surface former straightway 11-oil spit hole
Detailed description of the invention
In conjunction with accompanying drawing, the invention will be further described:
In conjunction with Fig. 1, Fig. 2, Fig. 3, one premix and pre-evaporation combustion chamber of the present invention.Fig. 1 is premix and pre-evaporation combustion chamber
Schematic diagram, Fig. 2 is premix and pre-evaporation combustion chamber sectional view, and Fig. 3 is head sectional view.
In order to make fuel oil fully be heated in main combustion stage oil pocket, extending main combustion stage oil pocket length, oil pocket upper wall surface is at original wall 10
In the case of increase converging portion 9 and expansion segment 8, this is in order to the air entered from main combustion stage accelerates through converging portion, at converging portion
Reach velocity of sound at venturi, then through expansion segment, further speed up.Oil pocket lower wall surface is to increase on the basis of original wall 4 and 5
Adding curved section 6, the purpose of curved section is to make the fuel oil inside oil pocket preferably receive the heat of pre-combustion grade flame.Fuel oil exists
Oil vapour is become after receiving substantial amounts of heat, the nozzle orifice ejection of oil pocket upper wall surface expansion segment, come in from main combustion stage cyclone
Air mixing, owing to present fuel oil has become oil vapour, so mix homogeneously, formed and be sufficiently mixed uniform pre-mixing gas combustion,
Efficiency of combustion can be effectively improved.And it is short to do time in advance, premix section is short, also can be prevented effectively from spontaneous combustion and tempering.
Claims (5)
1. a premix and pre-evaporation combustion chamber, including distribution form and the distribution mode of oil pocket expansion segment oil spit hole of oil pocket.It is characterized in that: based on former main combustion stage oil pocket form, add convergence expansion segment at it near the upper wall surface of main combustion stage air, add curved section at it near the lower wall surface of pre-combustion grade air.Oil pocket after extension is fully toasted by pre-combustion grade flame, and fuel oil is fully heated inside oil pocket, becomes oil vapour, then penetrates from the oil spit hole being positioned at oil pocket upper wall surface expansion segment.
A kind of premix and pre-evaporation combustion chamber the most according to claim 1, it is characterized in that: based on adding expansion segment and converging portion after the upper wall surface straightway of crude oil chamber, expansion segment is consistent, between 0.7mm～1.5mm with crude oil cavity wall face thickness with the wall thickness of converging portion.The total length of expansion segment and converging portion is between 15mm～20mm, and expansion segment expansion angle is between 10 °～35 °, and converging portion convergent angle is between 10 °～35 °.
A kind of premix and pre-evaporation combustion chamber the most according to claim 1, it is characterised in that: based on adding curved section after the lower wall surface straightway of crude oil chamber, curved section wall thickness is consistent, between 0.7mm～1.5mm with crude oil cavity wall face thickness.The total length of curved section is consistent with converging portion total length with upper wall surface expansion segment, between 15mm～20mm.The form of curved section is convex curve, and sweep is between 12mm～20mm.
A kind of premix and pre-evaporation combustion chamber the most according to claim 1, it is characterized in that: the oil spit hole regional extent of upper wall surface expansion segment determines according to oil pocket upper wall surface expansion segment, the magnitude range of the diameter of institute's perforate is 0.5～2mm, and opened circular hole row is 1～6 rows.
A kind of premix and pre-evaporation combustion chamber the most according to claim 1, it is characterized in that: fork row or the arrangement mode of in-line arrangement, optional excursion is minimum-value aperture size 1～10 times of its trestle column can be taked in the hole that the oil spit hole of upper wall surface expansion segment is opened when row is more than a row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300714.3A CN105972640B (en) | 2016-05-09 | 2016-05-09 | A kind of premix and pre-evaporation combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300714.3A CN105972640B (en) | 2016-05-09 | 2016-05-09 | A kind of premix and pre-evaporation combustion chamber |
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| Publication Number | Publication Date |
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| CN105972640A true CN105972640A (en) | 2016-09-28 |
| CN105972640B CN105972640B (en) | 2018-08-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654531A (en) * | 2018-12-05 | 2019-04-19 | 中国科学院工程热物理研究所 | A kind of half premixed channel structure of flame fore head of lean premixed combustor |
| CN111520759A (en) * | 2020-03-17 | 2020-08-11 | 西北工业大学 | Flame tube of flexible combustion low-pollution combustion chamber |
| CN111520750A (en) * | 2020-03-25 | 2020-08-11 | 西北工业大学 | Novel combustion chamber head oil injection structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105621A (en) * | 1991-08-16 | 1992-04-21 | Parker-Hannifin Corporation | Exhaust system combustor |
| CN101169252A (en) * | 2007-11-29 | 2008-04-30 | 北京航空航天大学 | Aerial engine lean premixed preevaporated low contamination combustion chamber |
| CN101275750A (en) * | 2008-04-25 | 2008-10-01 | 北京航空航天大学 | Radial swirler turning zone direct injection premixing and prevapourising low pollution burning chamber |
-
2016
- 2016-05-09 CN CN201610300714.3A patent/CN105972640B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5105621A (en) * | 1991-08-16 | 1992-04-21 | Parker-Hannifin Corporation | Exhaust system combustor |
| CN101169252A (en) * | 2007-11-29 | 2008-04-30 | 北京航空航天大学 | Aerial engine lean premixed preevaporated low contamination combustion chamber |
| CN101275750A (en) * | 2008-04-25 | 2008-10-01 | 北京航空航天大学 | Radial swirler turning zone direct injection premixing and prevapourising low pollution burning chamber |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654531A (en) * | 2018-12-05 | 2019-04-19 | 中国科学院工程热物理研究所 | A kind of half premixed channel structure of flame fore head of lean premixed combustor |
| CN111520759A (en) * | 2020-03-17 | 2020-08-11 | 西北工业大学 | Flame tube of flexible combustion low-pollution combustion chamber |
| CN111520750A (en) * | 2020-03-25 | 2020-08-11 | 西北工业大学 | Novel combustion chamber head oil injection structure |
| CN111520750B (en) * | 2020-03-25 | 2022-05-20 | 西北工业大学 | Novel combustion chamber head oil injection structure |
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| Publication number | Publication date |
|---|---|
| CN105972640B (en) | 2018-08-14 |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhang Qun Inventor after: Li Yifei Inventor after: Zhang Peng Inventor after: Wang Xin Inventor after: Hai Han Inventor after: Wang Yuming Inventor after: Xing Li Inventor after: Yan Dongbo Inventor after: Yang Shengzhe Inventor after: Li Chaochao Inventor before: Zhang Qun Inventor before: Wang Yuming Inventor before: Xing Li Inventor before: Yan Dongbo Inventor before: Yang Shengzhe Inventor before: Li Chaochao Inventor before: Li Yifei |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200330 Address after: 300000 room 2-103, Warner Jinghu garden, Dongli District, Tianjin Patentee after: CHENGLI AVIATION TECHNOLOGY Co.,Ltd. Address before: Beilin District Shaanxi province Xi'an City friendship road 710072 No. 127 Patentee before: Northwestern Polytechnical University |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: Room 2-103, Warner Jinghu Garden, Dongli District, Tianjin Patentee after: Establishment of Aviation Co., Ltd Address before: Room 2-103, Warner Jinghu garden, Dongli District, Tianjin Patentee before: CHENGLI AVIATION TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |