CN108019749A - A kind of swirl-flow premixed nozzle of radial grading - Google Patents
A kind of swirl-flow premixed nozzle of radial grading Download PDFInfo
- Publication number
- CN108019749A CN108019749A CN201711341715.3A CN201711341715A CN108019749A CN 108019749 A CN108019749 A CN 108019749A CN 201711341715 A CN201711341715 A CN 201711341715A CN 108019749 A CN108019749 A CN 108019749A
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- Prior art keywords
- flow
- swirl
- fuel channel
- radial
- combustion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of swirl-flow premixed nozzle of radial grading.The swirl-flow premixed nozzle of radial grading includes pre-combustion grade fuel channel main body, main combustion stage fuel channel main body, main air flow path bodies, flow-disturbing sleeve；Wherein, it is provided with pre-combustion grade fuel channel in the pre-combustion grade fuel channel main body；Main combustion stage fuel channel is provided with the main combustion stage fuel channel main body；Main air runner is formed between main air flow path bodies and pre-combustion grade fuel channel main body；Secondary air runner is formed between flow-disturbing sleeve and main air flow path bodies；Twayblade swirl-flow devices are provided with pre-combustion grade fuel channel main body；Level-one spray-hole and two-stage injection hole are provided with pre-combustion grade fuel channel main body；Radial vortex device is provided with secondary air runner.The application is simple in structure, and the mixing efficiency of fuel and air is high, and the pressure loss is small, meets engine request.
Description
Technical field
The present invention relates to gas-turbine combustion chamber technical field, more particularly to a kind of swirl-flow premixed nozzle of radial grading.
Background technology
With attention of the people to environmental protection problem, requirement of the countries in the world to gas-turbine combustion chamber discharge standard is got over
Come stringenter, generally requiring gas turbine, combustion chamber discharge can maintain reduced levels, at the same time 50% and above load setting
Keep higher efficiency of combustion.The pollutant of combustion chamber discharge mainly has nitrogen oxides, carbon monoxide and possible trouble hydrocarbon,
Wherein, nitrogen oxide NOx is the important indicator of pollutant emission, in order to achieve the purpose that low NOx drainage, premixed combustion technology quilt
It is widely used.Premixed combustion technology realizes the good mixing of fuel and oxidant using eddy flow hybrid technology mostly, carries out poor
The problems such as oily premixed combustion, but when the combustion chamber that work in this state extremely easily produces combustion instability, thermal acoustic oscillation.
To solve this problem, the mode of the certain diffusion flame of generally use tissue stablizes premixed flame in engineering, and for expanding
Flame is dissipated, participates in that the fuel of diffusion combustion is more, and combustion stability is better, but pollutant NOx emission performance is poorer.Therefore, it is
The contradiction between pollutant emission and combustion flame stability is solved, design being capable of rationalization's premixed combustion and diffusion combustion
Nozzle become low emission combustor core technology.
In the prior art, it is varied to the design form of combustion chamber burner, particularly with the spray of fuel gas injection
Mouth structure complexity is various, but structure type is complicated mostly, and the change to fuel mixing situation and velocity profile is not ideal enough, can not
Solve the problems, such as to stablize burning and low emission contradiction in engineering.
Existing gaseous fuel nozzle structure type complexity is various, but considers low emissions combustion and stablize the pre- of flame
Mix nozzle structure is less, these nozzles cannot solve low emission in engineering and stablize the contradictory problems of burning.
1) for premixing nozzle, in order to realize the uniform mixing of fuel and air, meet the requirement of different operating modes, usually will
Nozzle arrangements design complex, cause to process and adjust difficulty increase, while have tempering equivalent risk.
2) mixing nozzle of traditional structure is used, although structure is simple, can not realize the uniform of fuel and air
Mixing, pollutes the problems such as thing discharge is excessive.
3) for premixing nozzle, although the uniform mixing of fuel and air can be realized, pollutant emission, pole are reduced
Easily there is the problems such as combustion instability, thermal acoustic oscillation, stop working.
Thus, it is desirable to have a kind of technical solution is come at least one drawbacks described above for overcoming or at least mitigating the prior art.
The content of the invention
It is an object of the invention to provide a kind of swirl-flow premixed nozzle of radial grading to overcome or at least mitigate the prior art
At least one drawbacks described above.
To achieve the above object, the present invention provides a kind of swirl-flow premixed nozzle of radial grading, and the radial grading eddy flow is pre-
Mix nozzle includes pre-combustion grade fuel channel main body, main combustion stage fuel channel main body, main air flow path bodies, flow-disturbing sleeve；Its
In, it is provided with pre-combustion grade fuel channel in the pre-combustion grade fuel channel main body；Set in the main combustion stage fuel channel main body
There is main combustion stage fuel channel；
Main air is formed between the main air flow path bodies inner wall and the pre-combustion grade fuel channel body outer wall
Runner；
Secondary air runner is formed between the inner wall of the flow-disturbing sleeve and the main air flow path bodies outer wall；
Twayblade swirl-flow devices are provided with the pre-combustion grade fuel channel main body, the twayblade swirl-flow devices are located at one
In level air flow channel；
The connection pre-combustion grade fuel channel and the main air stream are provided with the pre-combustion grade fuel channel main body
The level-one spray-hole in road and two-stage injection hole；The level-one spray-hole is opposite with the flow-disturbing sleeve；The two-stage injection hole
The position of setting is the position that twayblade swirl-flow devices are provided with the pre-combustion grade fuel channel main body；
Radial vortex device is provided with the secondary air runner, there is radial vortex inside the radial vortex device
Blade, is provided with the inner flow passage for connecting the radial vortex blade exterior in the radial vortex blade；Wherein,
The level-one spray-hole is used for pre-combustion grade fuel injection into main air runner；The two-stage injection hole is used for
By pre-combustion grade fuel injection into the main air runner.
Preferably, the twayblade swirl-flow devices include multigroup blade group, and every group of blade group has two blades, each two
Rotational flow air runner is formed between blade；Main air runner described in the rotational flow air flow passage；The level-one spray-hole
Connect the rotational flow air runner.
Preferably, the rotational flow air runner and the pre-combustion grade fuel channel main body is axial into a deflection angle.
Preferably, the outlet of the connection main air runner of the rotational flow air runner formed between two blades
Locate to shrink outlet or expansion outlet.
Preferably, the egress form of the inner flow passage of the connection radial vortex blade exterior of the radial vortex blade is
The jet port formula of open type or array.
Preferably, the quantity of the level-one spray-hole is multiple；The quantity in the two-stage injection hole is multiple.
Preferably, the flow-disturbing sleeve includes disturbing flow device and two level venturi tube structure, the disturbing flow device and described two
Level venturi tube structure intersects.
Preferably, peak of the disturbing flow device in runner is not higher than the venturi highest point of venturi tube structure.
Preferably, the quantity of the disturbing flow device is multiple.
The swirl-flow premixed nozzle of radial grading of the application, fuel and the appropriate mixed proportion of air are completed in jet expansion,
And reach rational VELOCITY DISTRIBUTION, stable flow field and combustion field are organized the formation of into combustion chamber, low emissions combustion can be reached
With the purpose for stablizing flame.The nozzle arrangements are simple at the same time, and the mixing efficiency of fuel and air is high, and the pressure loss is small, meets work
Range request.
Brief description of the drawings
Fig. 1 is the structure diagram of the swirl-flow premixed nozzle of radial grading of the application first embodiment.
Fig. 2 is the structure diagram of twayblade swirl-flow devices in the swirl-flow premixed nozzle of radial grading shown in Fig. 1.
Fig. 3 is the structure diagram of radial direction swirl-flow devices in the swirl-flow premixed nozzle of radial grading shown in Fig. 1.
Fig. 4 is the structure diagram of flow-disturbing sleeve in the swirl-flow premixed nozzle of radial grading shown in Fig. 1.
Reference numeral：
Embodiment
To make the purpose, technical scheme and advantage that the present invention is implemented clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or there is same or like element.Described embodiment is the present invention
Part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without creative efforts, belong to the scope of protection of the invention.Under
Face is described in detail the embodiment of the present invention with reference to attached drawing.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on attached drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
Fig. 1 is the structure diagram of the swirl-flow premixed nozzle of radial grading of the application first embodiment.Fig. 2 is shown in Fig. 1
The swirl-flow premixed nozzle of radial grading in twayblade swirl-flow devices structure diagram.Fig. 3 is the radial grading eddy flow shown in Fig. 1
The structure diagram of radial direction swirl-flow devices in premixing nozzle.Fig. 4 is flow-disturbing set in the swirl-flow premixed nozzle of radial grading shown in Fig. 1
The structure diagram of cylinder.
The swirl-flow premixed nozzle of the radial grading as shown in Figures 1 to 4 includes pre-combustion grade fuel channel main body, main combustion stage
Fuel channel main body, main air flow path bodies, flow-disturbing sleeve；Wherein,
Pre-combustion grade fuel channel 1 is provided with the pre-combustion grade fuel channel main body；
Main combustion stage fuel channel 2 is provided with the main combustion stage fuel channel main body；
Main air runner is formed between main air flow path bodies inner wall and the pre-combustion grade fuel channel body outer wall
3；
Secondary air runner 4 is formed between the inner wall and main air flow path bodies outer wall of flow-disturbing sleeve；
Twayblade swirl-flow devices 11 are provided with pre-combustion grade fuel channel main body, the twayblade swirl-flow devices 11 are located at one
In level air flow channel 3；
The connection pre-combustion grade fuel channel 1 and the one of main air runner 3 is provided with pre-combustion grade fuel channel main body
Level spray-hole 9 and two-stage injection hole 10；Level-one spray-hole 9 is opposite with flow-disturbing sleeve 5；The position that two-stage injection hole 10 is set is
The position of twayblade swirl-flow devices 11 is provided with the pre-combustion grade fuel channel main body；
Radial vortex device 13 is provided with secondary air runner 4, the inside of radial vortex device 13 has radial vortex leaf
Piece, is provided with the inner flow passage for connecting the radial vortex blade exterior in radial vortex blade；Wherein,
Level-one spray-hole 9 is used for pre-combustion grade fuel injection into main air runner 3；Two-stage injection hole 10 is used for will be pre-
Level fuel injection is fired into main air runner 3.
The application can organize the formation of half premix diffusion combustion when using fuel gas in head of combustion chamber center,
In center, outer layer realizes the operating mode of full premix combustion.In main air runner, a part of fuel of pre-combustion grade exists first
Mixed in narrowed flow path between every group of axial swirl blades with a small amount of air, jet stream after being shunk by outlet flow, with
Air completion is partly-premixed, and another part is blended by way of jet stream at the venturi of Venturi tube contraction section with incoming, at the same time
In secondary air runner, main combustion stage fuel and air completion are fully premixed, and the swirl-flow premixed nozzle of the classification can be in combustion chamber
The Combustion Flow Field that head tissue is stablized, effectively reduces the discharge of combustion chamber pollutant.
Referring to Fig. 2, in the present embodiment, twayblade swirl-flow devices 11 include multigroup blade group, and every group of blade group has two
A blade, forms rotational flow air runner between each two blade；Rotational flow air flow passage main air runner；Level-one spray-hole
Connect rotational flow air runner.
Referring to Fig. 2, in the present embodiment, the rotational flow air runner and the pre-combustion grade fuel channel main body it is axial into
One deflection angle.
Referring to Fig. 2, in the present embodiment, the connection level-one of the rotational flow air runner formed between two blades
The exit of air flow channel exports to shrink outlet or expansion.
Referring to Fig. 3, in the present embodiment, the interior stream of the connection radial vortex blade exterior of the radial vortex blade
The egress form in road is open type or the jet port formula of array.
Referring to Fig. 2, in the present embodiment, the quantity of the level-one spray-hole is multiple；The quantity in the two-stage injection hole
To be multiple.
Referring to Fig. 4, in the present embodiment, flow-disturbing sleeve includes disturbing flow device 6 and two level venturi tube structure 7, disturbing flow device 6
Intersect with two level venturi tube structure 7.
Referring to Fig. 4, in the present embodiment, peak of the disturbing flow device 6 in runner is not higher than the venturi of venturi tube structure 7
Highest point.
Referring to Fig. 4, in the present embodiment, the quantity of disturbing flow device 6 is multiple.
In the present embodiment, twayblade swirl-flow devices and/or 13 eddy flow rotation direction of radial vortex device are seen in downstream, Ke Yishi
Clockwise or counterclockwise.
The shape in two-stage injection hole can sets itself as needed.For example, circle, ellipse, triangle etc..
Referring to Fig. 1, in the present embodiment, one-level venturi structure 8 is provided with main air flow path bodies.
9 oblique radial distribution of level-one spray-hole, at the venturi that one-level venturi 8 can be corresponded to, can also correspond to leading portion or
Back segment.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Pipe is with reference to the foregoing embodiments described in detail the present invention, it will be understood by those of ordinary skill in the art that：It is still
It can modify to the technical solution described in foregoing embodiments, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical solution
God and scope.
Claims (9)
1. a kind of swirl-flow premixed nozzle of radial grading, it is characterised in that the swirl-flow premixed nozzle of radial grading includes pre-combustion grade
Fuel channel main body, main combustion stage fuel channel main body, main air flow path bodies, flow-disturbing sleeve；Wherein,
Pre-combustion grade fuel channel (1) is provided with the pre-combustion grade fuel channel main body；
Main combustion stage fuel channel (2) is provided with the main combustion stage fuel channel main body；
Main air runner is formed between the main air flow path bodies inner wall and the pre-combustion grade fuel channel body outer wall
(3)；
Secondary air runner (4) is formed between the inner wall of the flow-disturbing sleeve and the main air flow path bodies outer wall；
Twayblade swirl-flow devices (11), twayblade swirl-flow devices (11) position are provided with the pre-combustion grade fuel channel main body
In main air runner (3)；
The connection pre-combustion grade fuel channel (1) and the main air runner are provided with the pre-combustion grade fuel channel main body
(3) level-one spray-hole (9) and two-stage injection hole (10)；The level-one spray-hole (9) is opposite with the flow-disturbing sleeve (5)；
The position that the two-stage injection hole (10) is set is to be provided with twayblade swirl-flow devices in the pre-combustion grade fuel channel main body
(11) position；
Radial vortex device (13) is provided with the secondary air runner (4), is had inside the radial vortex device (13)
Radial vortex blade, is provided with the inner flow passage for connecting the radial vortex blade exterior in the radial vortex blade；Wherein,
The level-one spray-hole (9) is used for pre-combustion grade fuel injection into main air runner (3)；The two-stage injection hole
(10) it is used for pre-combustion grade fuel injection into the main air runner (3).
2. the swirl-flow premixed nozzle of radial grading as claimed in claim 1, it is characterised in that the twayblade swirl-flow devices (11)
Including multigroup blade group, every group of blade group has two blades, and rotational flow air runner is formed between each two blade；The eddy flow
Air flow channel connects the main air runner；The level-one spray-hole connects the rotational flow air runner.
3. the swirl-flow premixed nozzle of radial grading as claimed in claim 2, it is characterised in that the rotational flow air runner with it is described
Pre-combustion grade fuel channel main body it is axial into a deflection angle.
4. the swirl-flow premixed nozzle of radial grading as claimed in claim 3, it is characterised in that formed between two blades
The exit of the connection main air runner of rotational flow air runner is contraction outlet or expansion outlet.
5. the swirl-flow premixed nozzle of radial grading as claimed in claim 1, it is characterised in that the connection of the radial vortex blade
The egress form of the inner flow passage of the radial vortex blade exterior is open type or the jet port formula of array.
6. the swirl-flow premixed nozzle of radial grading as claimed in claim 1, it is characterised in that the quantity of the level-one spray-hole is
It is multiple；The quantity in the two-stage injection hole is multiple.
7. the swirl-flow premixed nozzle of radial grading as claimed in claim 1, it is characterised in that the flow-disturbing sleeve is filled including flow-disturbing
(6) and two level venturi tube structure (7) are put, the disturbing flow device (6) is intersected with the two level venturi tube structure (7).
8. where require 7 as described in the swirl-flow premixed nozzle of radial grading, it is characterised in that disturbing flow device (6) is in runner
Peak be not higher than venturi tube structure (7) venturi highest point.
9. the swirl-flow premixed nozzle of radial grading as claimed in claim 8, it is characterised in that the quantity of the disturbing flow device (6)
To be multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711341715.3A CN108019749A (en) | 2017-12-14 | 2017-12-14 | A kind of swirl-flow premixed nozzle of radial grading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711341715.3A CN108019749A (en) | 2017-12-14 | 2017-12-14 | A kind of swirl-flow premixed nozzle of radial grading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108019749A true CN108019749A (en) | 2018-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711341715.3A Pending CN108019749A (en) | 2017-12-14 | 2017-12-14 | A kind of swirl-flow premixed nozzle of radial grading |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983496A (en) * | 2021-09-23 | 2022-01-28 | 中国联合重型燃气轮机技术有限公司 | Nozzle, combustion chamber and gas turbine |
| CN114087607A (en) * | 2020-07-27 | 2022-02-25 | 芜湖美的厨卫电器制造有限公司 | Premixing device and gas water heater |
| CN115254476A (en) * | 2022-09-27 | 2022-11-01 | 成都中科翼能科技有限公司 | Nozzle structure for gas turbine |
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| CN107289460A (en) * | 2017-06-10 | 2017-10-24 | 北京航空航天大学 | A kind of oil-poor direct-injection air atomizer spray nozzle of pre- membranous type |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115254476A (en) * | 2022-09-27 | 2022-11-01 | 成都中科翼能科技有限公司 | Nozzle structure for gas turbine |
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