CN104654359B - A kind of flow guiding structure of combustion chamber premixer fuel nozzle - Google Patents
A kind of flow guiding structure of combustion chamber premixer fuel nozzle Download PDFInfo
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- CN104654359B CN104654359B CN201510080615.4A CN201510080615A CN104654359B CN 104654359 B CN104654359 B CN 104654359B CN 201510080615 A CN201510080615 A CN 201510080615A CN 104654359 B CN104654359 B CN 104654359B
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Abstract
A kind of flow guiding structure of combustion chamber premixer fuel nozzle, the nozzle contain suspension flange, outer tube, inner tube, air cyclone and flow guiding structure；Flow guiding structure is arranged between suspension flange and air cyclone, including the first air conduction plate, the second air conduction plate and drainage plate installing plate；The curved shape in windward side of air conduction plate, and fin-shaped flow deflector is provided with windward side；Turbulence structure is equipped with air conduction plate and fin-shaped flow deflector.Two air conduction plates are respectively nested on outer tube, and are arranged relative to the axisymmetrical of outer tube.One end of first air conduction plate and the second air conduction plate is arranged on air cyclone, and its other end is vacantly placed.On the one hand the structure can effectively reduce the air radial velocity of air cyclone entrance, improve air axial velocity profile at this, on the other hand be that air produces small disturbance, help to improve the mixing of fuel and air, so as to effectively reduce NOxDischarge, prevent the generation of tempering and flame attachment.
Description
Technical field
The present invention relates to a kind of gas-turbine combustion chamber nozzle, more particularly to a kind of combustion chamber premix with flow guiding structure
Fuel nozzle is closed, belongs to gas turbine technology field.
Background technology
A kind of low NO of specific dry typexThe combustion system of discharge surrounds turbine rotor including multiple combustion chambers with annular array
Axis is set, and each combustion chamber is mixed air with fuel before combustion, burning mixt is then put, so as to produce high temperature
The burning gases of high pressure.Fuel injection system for various combustion chambers is made up of multiple fuel nozzles, fuel nozzle installation
On the end cap of the combustion chamber upstream end.If fuel is not well mixed before combustion with air, will be in a combustion chamber
Form hot localised points.Hot localised points may increase NOxDischarge capacity, and the flame tempering in combustion chamber can be increased into nozzle
Or the probability of nozzle is attached to, so as to defective nozzle.
It is well known that the thermal efficiency of gas turbine engine systems generally improves with the rise of fuel gas temperature.It is now existing a variety of
Technology can be used to improve running temperature, and minimize NOxDischarge capacity, and tempering and flame attachment probability.By continuous
Improvement nozzle design can make fuel and air mix before combustion evenly, so as to reduce or prevent tempering or flame it is attached
.Quantity by increasing nozzle can increase the uniformity of mixing to a certain extent, but because nozzle is arranged on periphery, air from
The velocity component of a radial direction can be present by being flowed to outside nozzle at center, the velocity component can influence air in air cyclone
Interior flowing, air is caused to be mixed with fuel uneven.Mixing uneven can increase NOxDischarge, influences flame holding and leads
Cause tempering/flame attachment.
The content of the invention
It is an object of the invention to provide a kind of flow guiding structure of combustion chamber premixer fuel nozzle, an object of the present invention
It is to realize that active accommodation enters the air capacity of peripheral injector nozzles, contributes to the air of peripheral injector nozzles and central nozzle to distribute, improves empty
The mixed effect of gas and fuel, so as to strengthen burning stability.
It is another object of the present invention to make the air into peripheral injector nozzles produce small disturbance, fuel is allowed to be mixed in small whirlpool yardstick
Close, effectively improve the uniformity that fuel mixes with air.
Technical scheme is as follows：
A kind of flow guiding structure of combustion chamber premixer fuel nozzle, the nozzle include suspension flange, outer tube, inner tube and sky
Cyclonic current device；Fuel gas passageway is formed between inner and outer tubes, internal tube is air duct；Described air cyclone is set
It is connected in the outside of outer tube, and with fuel gas passageway；It is characterized in that：The flow guiding structure is arranged on suspension flange and air rotation
Between flowing device, the flow guiding structure includes the first air conduction plate, the second air conduction plate and drainage plate installing plate；First air draws
The curved shape in windward side of flowing plate and the second air conduction plate；Distinguish the side of first air conduction plate and the second air conduction plate
It is nested on outer tube, and is arranged relative to the axisymmetrical of outer tube；One end of first air conduction plate and the second air conduction plate
It is arranged on by drainage plate installing plate on air cyclone, the other end of the first air conduction plate and the second air conduction plate is hanging
Place；Fin-shaped flow deflector is respectively arranged with the windward side of the first air conduction plate and the second air conduction plate, and every
Turbulence structure is provided with the windward side of individual air conduction plate and fin-shaped flow deflector.
The technical characteristic of the present invention also resides in：The nozzle also includes support, the first air conduction plate and the second sky
One end of gas drainage plate is fixed on drainage plate installing plate by support, and drainage plate installing plate is fixed on outside air cyclone and leaned on
The side of nearly combustion chamber centerline.
The present invention another technical characteristic be：The first described air conduction plate and the lee face cloth of the second air conduction plate
It is equipped with reinforcement.
The lee face of first air conduction plate of the present invention and the second air conduction plate is provided with reinforcement；It is described
Turbulence structure be pit, projection or rib of column structure.
One end of the hanging placement of first air conduction plate of the present invention and the second air conduction plate passes through alignment pin
Linked together with dowel hole.
A kind of flow guiding structure of premixer fuel nozzle provided by the invention, there is advantages below：1. it can effectively reduce sky
The radial velocity of gas, there is a more uniform axial velocity profile before air air inlet cyclone, improves air and fuel
Uniformly mixing；2. increasing the air capacity of peripheral injector nozzles, the air of peripheral injector nozzles and central nozzle is contributed to distribute；3. turbulence structure
Caused microvariations, allow fuel to be mixed in small whirlpool yardstick, effectively improve the uniformity that fuel mixes with air.
Brief description of the drawings
Fig. 1 is the structural representation (sectional view) of the premixer fuel nozzle embodiment of the present invention.
Fig. 2 is the three dimensional structure diagram of the embodiment shown in Fig. 1.
Fig. 3 is the three-dimensional partial structural diagram of the embodiment shown in Fig. 2.
Fig. 4 a and Fig. 4 b are respectively windward side and the three-dimensional structure signal of lee face of the first air conduction plate shown in Fig. 1
Figure.
Fig. 5 a and Fig. 5 b are respectively windward side and the three-dimensional structure signal of lee face of the second air conduction plate shown in Fig. 1
Figure.
In figure, 1- outer tubes；2- hangs flange；3- the first air conduction plates；4- the second air conduction plates；5- drainage plates are installed
Plate；6- supports；7- reinforcements；8- alignment pins；9- dowel holes；10- air cyclones；11- fin-shaped flow deflectors；12- flow-disturbing knots
Structure；14- inner tubes；15- bellowss；16- glass holders；17- fuel injection posts；18- fuel orifices.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Following instance
For illustrating the present invention, but it is not used in limitation the scope of the present invention.
As shown in FIG. 1 to 3, combustion chamber premixer fuel nozzle provided by the invention includes outer tube 1, suspension flange 2, sky
Cyclonic current device 10, inner tube 14, bellows 15, glass holder 16, fuel injection post 17, fuel orifice 18 and flow guiding structure, inner tube 14
Fuel gas passageway is formed between outer tube 1, the inside of inner tube 14 is air duct, and air cyclone is arranged on the outside of outer tube 1, and
It is connected with fuel gas passageway；The flow guiding structure is arranged between suspension flange 2 and air cyclone 10, and the flow guiding structure includes
First air conduction plate 3, the second air conduction plate 4 and drainage plate installing plate 5；First air conduction plate 3 and the second air conduction
The curved shape in windward side of plate 4；The side of first air conduction plate 3 and the second air conduction plate 4 is semi arch, is respectively nested in
On outer tube 1, and arranged relative to the axisymmetrical of outer tube 1；One end of first air conduction plate 3 and the second air conduction plate 4 leads to
Drainage plate installing plate 5 is crossed on air cyclone, the other end of the first air conduction plate 3 and the second air conduction plate 4 hangs
Sky is placed.Fin-shaped flow deflector 11 is respectively arranged with the windward side of the first air conduction plate 3 and the second air conduction plate 4,
And it is provided with turbulence structure 12 on the windward side of each air conduction plate and fin-shaped flow deflector 11.It is described in the present embodiment
Nozzle also includes support 6, and one end of the first air conduction plate 3 and the second air conduction plate 4 is fixed on drainage by support 6
On plate installing plate 5, drainage plate installing plate 5 is fixed on outside air cyclone close to the side of combustion chamber centerline.
Fin-shaped flow deflector 11 is provided with the windward side of the first air conduction plate 3 and the second air conduction plate 4, the fin
Shape flow deflector can play guide functions to air；Turbulence structure 12 is provided with air conduction plate and fin-shaped flow deflector 11,
Turbulence structure 12 in the present embodiment is bowl configurations, but is not limited to pit, or the rib of column, projection etc., to increase air
Turbulivity, the thickness of the boundary-layer in drainage plate surface is effectively reduced, improves the uniformity of air-flow, and reduce flow resistance；Separately
Microvariations caused by outer turbulence structure 12, allow fuel to be mixed in small whirlpool yardstick, effectively improve the uniformity that fuel mixes with air.
As shown in Fig. 4 a, Fig. 4 b, Fig. 5 a and Fig. 5 b, the lee face of each air conduction plate is arranged with reinforcement 7, can show
The rigidity of increase air conduction plate is write, prevents from resonating in the course of work, strengthens its reliability.The He of first air conduction plate 3
Second air conduction plate 4 is respectively disposed with alignment pin 8 and dowel hole 9 in the side away from support 6, by alignment pin 8 during installation
Insert in dowel hole 9, constrained by alignment pin, prevent the first air conduction plate from staggering with the second air conduction plate, and can be square
Just dismount.Two air conduction plate other ends are fixed on air cyclone by bolt or other means.
The operation principle of the present invention is as follows：Air produces eddy flow by air cyclone 10, and air is outside fuel nozzle
Upstream direction flows, and runs into after the end cap of combustion chamber end to center flow, incoming fuel nozzle, in the work of air conduction plate
Under, the radial velocity of air can be effectively reduced, air is had more uniform VELOCITY DISTRIBUTION in the axial direction, so as to improve air
With the mixing of fuel.Fuel gas passes through the fuel orifice 18 on fuel injection post 17 from the suspension incoming fuel gas passage of flange 2
Spray, mixed in the region between glass holder 16 and outer tube 1 with rotational flow air, producing flame in downstream is burnt.
Claims (5)
1. a kind of flow guiding structure of combustion chamber premixer fuel nozzle, the nozzle includes suspension flange (2), outer tube (1), inner tube
And air cyclone (10) (14)；Fuel gas passageway is formed between inner tube (14) and outer tube (1), is led to inside inner tube (14) for air
Road；Described air cyclone (10) is arranged on the outside of outer tube (1), and is connected with fuel gas passageway；It is characterized in that：It is described
Flow guiding structure is arranged between suspension flange (2) and air cyclone (10), and the flow guiding structure includes the first air conduction plate
(3), the second air conduction plate (4) and drainage plate installing plate (5)；First air conduction plate (3) and the second air conduction plate (4)
The curved shape in windward side；The side of first air conduction plate (3) and the second air conduction plate (4) is respectively nested on outer tube (1),
And arranged relative to the axisymmetrical of outer tube (1)；One end of first air conduction plate (3) and the second air conduction plate (4) passes through
Drainage plate installing plate (5) is arranged on air cyclone, the first air conduction plate (3) and the second air conduction plate (4) it is another
End is hanging to place；
Fin-shaped flow deflector is respectively arranged with the windward side of the first air conduction plate (3) and the second air conduction plate (4)
(11), and on the windward side of each air conduction plate and fin-shaped flow deflector (11) it is provided with turbulence structure (12).
A kind of 2. flow guiding structure of combustion chamber premixer fuel nozzle as claimed in claim 1, it is characterised in that the nozzle
Also include support (6), one end of the first air conduction plate (3) and the second air conduction plate (4) is fixed on by support (6)
On drainage plate installing plate (5), drainage plate installing plate (5) is fixed on outside air cyclone close to the side of combustion chamber centerline.
3. a kind of flow guiding structure of combustion chamber premixer fuel nozzle as claimed in claim 1, it is characterised in that described the
The lee face of one air conduction plate (3) and the second air conduction plate (4) is provided with reinforcement (7).
A kind of 4. flow guiding structure of combustion chamber premixer fuel nozzle as described in claim 1,2 or 3, it is characterised in that institute
The turbulence structure (12) stated is pit, projection or rib of column structure.
5. a kind of flow guiding structure of combustion chamber premixer fuel nozzle as claimed in claim 4, it is characterised in that described the
One end of the hanging placement of one air conduction plate (3) and the second air conduction plate (4) passes through alignment pin (8) and dowel hole (9)
Link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080615.4A CN104654359B (en) | 2015-02-13 | 2015-02-13 | A kind of flow guiding structure of combustion chamber premixer fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080615.4A CN104654359B (en) | 2015-02-13 | 2015-02-13 | A kind of flow guiding structure of combustion chamber premixer fuel nozzle |
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| Publication Number | Publication Date |
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| CN104654359A CN104654359A (en) | 2015-05-27 |
| CN104654359B true CN104654359B (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510080615.4A Active CN104654359B (en) | 2015-02-13 | 2015-02-13 | A kind of flow guiding structure of combustion chamber premixer fuel nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116167305B (en) * | 2023-04-23 | 2023-06-27 | 成都前沿动力科技有限公司 | Flow field data prediction method and device for turbulent combustion flow field and storage medium |
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|---|---|---|---|---|
| CN2534472Y (en) * | 2002-04-12 | 2003-02-05 | 姜政华 | Fine coal powder and natural gas two purpose burner |
| CN103216848A (en) * | 2012-01-18 | 2013-07-24 | 通用电气公司 | Combustor assembly with impingement sleeve holes and turbulators |
| CN103528094A (en) * | 2013-07-10 | 2014-01-22 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device for gas fuel of gas turbine |
| CN103759293A (en) * | 2009-03-17 | 2014-04-30 | 西门子公司 | Heat shield element of a heat shield |
| CN203586283U (en) * | 2013-07-10 | 2014-05-07 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device of combustion gas turbine employing gas fuel |
| CN204513455U (en) * | 2015-02-13 | 2015-07-29 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | The flow guiding structure of a kind of combustion chamber premixer fuel nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2956724B1 (en) * | 2010-02-23 | 2012-03-16 | Snecma | FUEL INJECTION SYSTEM FOR A TURBOMACHINE COMBUSTION CHAMBER |
| DE102012204103A1 (en) * | 2012-03-15 | 2013-09-19 | Siemens Aktiengesellschaft | Heat shield element for a compressor air bypass around the combustion chamber |
-
2015
- 2015-02-13 CN CN201510080615.4A patent/CN104654359B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2534472Y (en) * | 2002-04-12 | 2003-02-05 | 姜政华 | Fine coal powder and natural gas two purpose burner |
| CN103759293A (en) * | 2009-03-17 | 2014-04-30 | 西门子公司 | Heat shield element of a heat shield |
| CN103216848A (en) * | 2012-01-18 | 2013-07-24 | 通用电气公司 | Combustor assembly with impingement sleeve holes and turbulators |
| CN103528094A (en) * | 2013-07-10 | 2014-01-22 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device for gas fuel of gas turbine |
| CN203586283U (en) * | 2013-07-10 | 2014-05-07 | 辽宁省燃烧工程技术中心（有限公司） | Dry-type low-nitrogen combustion device of combustion gas turbine employing gas fuel |
| CN204513455U (en) * | 2015-02-13 | 2015-07-29 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | The flow guiding structure of a kind of combustion chamber premixer fuel nozzle |
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| CN104654359A (en) | 2015-05-27 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20191225 Address after: 102209 Beijing Changping District in the future of the national electric investment group Park in the future science city south of Beijing Patentee after: China United heavy-duty gas turbine technology Co., Ltd. Address before: 100084 No. 8, building 1, No. 1001, Zhongguancun East Road, Beijing, Haidian District Patentee before: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. |
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| TR01 | Transfer of patent right |