CN105240872B - A kind of chamber head parts - Google Patents
A kind of chamber head parts Download PDFInfo
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- CN105240872B CN105240872B CN201510591749.2A CN201510591749A CN105240872B CN 105240872 B CN105240872 B CN 105240872B CN 201510591749 A CN201510591749 A CN 201510591749A CN 105240872 B CN105240872 B CN 105240872B
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Abstract
The present invention relates to dry low emission combustor fields, and in particular to a kind of chamber head parts influence the combustion engine service life to solve the problem of current combustion room outlet temperature field poor quality.Chamber head parts include：Central cylinder, inner cylinder rear wall are attached to the upstream end of Swirl device；Centerbody outer wall is coaxially disposed with central cylinder；Level-one cyclone is centrally affixed the downstream of external wall；Cylinder is extended, is attached in the downstream of level-one cyclone.Chamber head parts of the present invention expand Central backflow area volume by the level-one cyclone help on the outside of Swirl device, while enhance its stability；Simultaneously, air-flow forms Central backflow area by direct sudden expansion after Swirl device, the upward downstream of Central backflow area axial position, annulus air-flow weakens the squeezing action of Central backflow area significantly, further enhance Central backflow area stability, the fuel-lean blowout border of combustion chamber is extended, optimizes the performance of combustion chamber.
Description
Technical field
The present invention relates to dry low emission combustor fields, and in particular to a kind of chamber head parts.
Background technology
At present, with the increasingly strict requirement of user, discharge of gas turbine has become the crucial mark of gas turbine industry
Standard, and dry low emissions combustion technology is applied because it can be effectively reduced discharge and optimization combustion chamber service life in low emission field
The most extensively, do low emissions combustion technology mainly using poor premixed combustion mode, reduce combustion zone flame temperature, so as to ensure compared with
Low NOx emission.
Due to using poor premixed combustion mode, combustion instability becomes one of problem in dry low emission combustor, because
This combustion chamber air current composition needs emphasis to consider the problems of, it is necessary to ensure the recirculating zone in combustion chamber as the Combustion chamber design stage
Stablize and volume is enough.
Existing chamber head parts are limited to the border of central cylinder, and institute in the recirculating zone in Swirl device downstream
The Central backflow area of formation can be subject to the squeezing action of annulus exit flow, cause Central backflow area underdeveloped, cause
Combustion instability phenomenon, while recirculating zone more downstream extends, and causes combustor exit temperature field quality variation, influences to fire
The machine service life.
The content of the invention
The object of the present invention is to provide a kind of chamber head parts, to solve current combustion room outlet temperature field quality
Difference, the problem of so as to influence the combustion engine service life.
The technical scheme is that：
A kind of chamber head parts, including：
Central cylinder, with Swirl device and inner cylinder rear wall, the inner cylinder rear wall is attached to the center rotation
Flow the upstream end of device；
Centerbody outer wall is coaxially disposed with central cylinder；
Level-one cyclone, is co-axially located at the outside of the Swirl device, and is attached under the centerbody outer wall
Swim end and concordant with the downstream of the Swirl device；
Cylinder is extended, it is identical with the centerbody outer diameter, it is attached in the downstream of the level-one cyclone.
Optionally, there is turbulator on the inner wall of the centerbody outer wall.
Optionally, the turbulator is multiple circumferential ribs, the axis of the circumferential rib and the axis weight of the central cylinder
It closes, multiple circumferential ribs are in axial direction uniformly distributed.
Optionally, the level-one cyclone is welded on the downstream of centerbody outer wall.
Optionally, the extension barrel soldering is in the downstream of level-one cyclone.
Optionally, the radius of the extension cylinder and high ratio are 1.5~2.
Beneficial effects of the present invention：
Chamber head parts of the present invention expand Central backflow area by the level-one cyclone help on the outside of Swirl device
Volume, while enhance its stability；Meanwhile air-flow forms Central backflow area by direct sudden expansion after Swirl device, center is returned
The upward downstream of area's axial position is flowed, annulus air-flow weakens the squeezing action of Central backflow area significantly, in further enhancing
Heart recirculating zone stability extends the fuel-lean blowout border of combustion chamber, optimizes the performance of combustion chamber.
Description of the drawings
Fig. 1 is the simplification view in the section of prior art gas-turbine combustion chamber；
Fig. 2 is the simplification view in the section of prior art gas-turbine combustion chamber head assembly；
Fig. 3 is the simplification view in the section of gas-turbine combustion chamber of the present invention；
Fig. 4 is the simplification view in the section of gas-turbine combustion chamber head assembly of the present invention.
Reference numeral：
Combustion chamber 10,39；
Head assembly 11,40；
Central cylinder 12,41；
Swirl device 13,42；
Inner cylinder antetheca 14；
Inner cylinder rear wall 15,43；
Centerbody outer wall 16,44；
Level-one cyclone 17,45；
Extend cylinder 46；
Turbulator 18,47；
Central backflow area 19,48；
Annulus 20,49；
Center premixed channel 21,50；
Cooling air passage 22,51.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar element.
Refering to what is shown in Fig. 1, show generally the head assembly 11 of existing gas-turbine combustion chamber 10；With reference to figure 2, the head
Parts 11 include central cylinder 12, centerbody outer wall 16 and level-one cyclone 17；Wherein, central cylinder 12 includes Swirl
Device 13, inner cylinder antetheca 14 and inner cylinder rear wall 15, three form center premixed channel 21, are used for by being connected before and after welding
The abundant premix of fuel and air, and Central backflow area 19 (dotted portion) is formed in 21 downstream of center premixed channel, for steady
Fixed burning.
Level-one cyclone 17 is welded on the outside of 14 downstream of inner cylinder antetheca of central cylinder 12, for cooling down head group
11 nearly flame end face of part, while combustion chamber can be prevented to be tempered；Centerbody outer wall 16 is welded on the upstream end of level-one cyclone 17,
And with 12 coaxial placement of central cylinder, between form cooling air passage 22, incoming air enters cooling air passage 22 and cools down
Centerbody outer wall 16；Centerbody outer wall 16 includes turbulator component 18, can enhance the turbulence level of cooling air, in strengthening
The cooling effect of the external wall 16 of the heart.Existing result of the test shows that annulus 20 (dotted portion) exit flow can be to central backflow
Area 19, which is formed, to be squeezed, and is caused Central backflow area 19 unstable, is influenced combustion stability.
With reference to figure 3, the present invention provides a kind of head assemblies 40 of the combustion chamber 39 of gas turbine；With reference to figure 4, the head
Component 40 includes central cylinder 41, centerbody outer wall 44 and level-one cyclone 45.
Wherein, central cylinder 41 includes Swirl device 42 and inner cylinder rear wall 43；Inner cylinder rear wall 43 passes through welding side
Formula is attached to the upstream end of Swirl device 42, center premixed channel 50 is formed, for fuel and the abundant premix of air.Center
50 downstream of premixed channel forms Central backflow area 48 (dotted portion), burns for stablizing.
Level-one cyclone 45, is co-axially located at the outside of Swirl device 42, and is centrally affixed the downstream of external wall 44
It holds and concordant with the downstream of Swirl device 42；For 48 (dotted line of Central backflow area caused by strengthening the center cyclone 42
Part), increase 48 volume of Central backflow area, optimize combustion stability.
Centerbody outer wall 44 is welded on the upstream end of level-one cyclone 45, and with 41 coaxial placement of central cylinder, between shape
Into cooling air passage 51, incoming air enters cooling air passage 51 and cools down centerbody outer wall 44.
Centerbody outer wall 44 includes 47 component of turbulator, can enhance the turbulence level of cooling air, so as to strengthening the center body
The cooling effect of outer wall 44；Wherein, turbulator 47 can be a variety of suitable shapes, in the present embodiment, in order to further improve
Enhancing the turbulence level of cooling air, turbulator 47 is multiple circumferential ribs, and the axis of circumferential rib is overlapped with the axis of central cylinder 41,
Multiple circumferential ribs are in axial direction uniformly distributed.
Extension cylinder 46 can make Swirl device 42 and the exit flow of level-one cyclone 45 carry out sudden expansion earlier, from
And 48 position of Central backflow area is made to move forward, weaken squeezing action of 49 exit flow of annulus to Central backflow area 48, further
Optimize combustion stability；Further, in the present embodiment, in order to ensure the sudden expansion effect of exit flow, preferred development cylinder 46
Radius is 1.5~2 with high ratio.Meanwhile 45 exit flow of level-one cyclone under cyclonic action have to wall surface close to
Trend can cool down extension cylinder 46, prevent extension cylinder 46 from ablation phenomen occur.
The head assembly 40 of combustion chamber of the present invention, in being expanded by the help of level-one cyclone 45 in 42 outside of Swirl device
48 volume of heart recirculating zone, while enhance its stability；Meanwhile air-flow forms center by direct sudden expansion after Swirl device 42 and returns
Stream area 48, the upward downstream of 48 axial position of Central backflow area, 49 air-flow of annulus are big to the squeezing action of Central backflow area 48
It is big to weaken, 48 stability of Central backflow area is further enhanced, extends the fuel-lean blowout border of combustion chamber 39, optimizes combustion chamber 39
Performance.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, all should by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as
It is accurate.
Claims (6)
1. a kind of chamber head parts, which is characterized in that including：
Central cylinder (41), with Swirl device (42) and inner cylinder rear wall (43), the inner cylinder rear wall (43) is attached
To the upstream end of the Swirl device (42)；
Centerbody outer wall (44) is coaxially disposed with central cylinder (41)；
Level-one cyclone (45), is co-axially located at the outside of the Swirl device (42), and is attached in the centerbody outer wall
(44) downstream and concordant with the downstream of the Swirl device (42)；
Cylinder (46) is extended, it is identical with centerbody outer wall (44) diameter, it is attached in the downstream of the level-one cyclone (45)
End.
2. chamber head parts according to claim 1, which is characterized in that on the inner wall of the centerbody outer wall (44)
With turbulator (47).
3. chamber head parts according to claim 2, which is characterized in that the turbulator (47) is multiple annulars
Rib, the axis of the circumferential rib are overlapped with the axis of the central cylinder (41), and multiple circumferential ribs are in axial direction uniform
Distribution.
4. chamber head parts according to claim 1, which is characterized in that the level-one cyclone (45) is welded on institute
State the downstream of centerbody outer wall (44).
5. chamber head parts according to claim 1, which is characterized in that the extension cylinder (46) is welded on described
The downstream of level-one cyclone (45).
6. chamber head parts according to claim 1, which is characterized in that the radius of the extension cylinder (46) and height
Ratio be 1.5~2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591749.2A CN105240872B (en) | 2015-09-17 | 2015-09-17 | A kind of chamber head parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591749.2A CN105240872B (en) | 2015-09-17 | 2015-09-17 | A kind of chamber head parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105240872A CN105240872A (en) | 2016-01-13 |
| CN105240872B true CN105240872B (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510591749.2A Active CN105240872B (en) | 2015-09-17 | 2015-09-17 | A kind of chamber head parts |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654532B (en) * | 2018-12-14 | 2020-10-23 | 中国航发沈阳发动机研究所 | End cover assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067497A (en) * | 2006-05-04 | 2007-11-07 | 通用电气公司 | A method and arrangement for expanding a primary and secondary flame in a combustor |
| CN101392917A (en) * | 2007-09-21 | 2009-03-25 | 通用电气公司 | Toroidal ring manifold for secondary fuel nozzle of a dln gas turbine |
| CN101639220A (en) * | 2008-07-28 | 2010-02-03 | 通用电气公司 | Centerbody cap for a turbomachine combustor and method |
| CN104807042A (en) * | 2015-05-15 | 2015-07-29 | 中国航空工业集团公司沈阳发动机设计研究所 | Combustion chamber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005040682A2 (en) * | 2003-09-05 | 2005-05-06 | Delavan Inc | Device for stabilizing combustion in gas turbine engines |
-
2015
- 2015-09-17 CN CN201510591749.2A patent/CN105240872B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067497A (en) * | 2006-05-04 | 2007-11-07 | 通用电气公司 | A method and arrangement for expanding a primary and secondary flame in a combustor |
| CN101392917A (en) * | 2007-09-21 | 2009-03-25 | 通用电气公司 | Toroidal ring manifold for secondary fuel nozzle of a dln gas turbine |
| CN101639220A (en) * | 2008-07-28 | 2010-02-03 | 通用电气公司 | Centerbody cap for a turbomachine combustor and method |
| CN104807042A (en) * | 2015-05-15 | 2015-07-29 | 中国航空工业集团公司沈阳发动机设计研究所 | Combustion chamber |
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| Publication number | Publication date |
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| CN105240872A (en) | 2016-01-13 |
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