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 PDF

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Publication number
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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air
conduction plate
air conduction
plate
tube
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CN201510080615.4A
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CN104654359A (en
Inventor
刘小龙
张珊珊
查筱晨
张龙
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China United heavy-duty gas turbine technology Co., Ltd.
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Beijing Huatsing Gas Turbine & Igcc Technology Co Ltd
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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

A kind of flow guiding structure of combustion chamber premixer fuel nozzle
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.
CN201510080615.4A 2015-02-13 2015-02-13 A kind of flow guiding structure of combustion chamber premixer fuel nozzle Active CN104654359B (en)

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CN104654359B true CN104654359B (en) 2017-12-19

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Citations (6)

* Cited by examiner, † Cited by third party
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
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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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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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