CN206514340U - Gas-turbine combustion chamber and its nozzle - Google Patents
Gas-turbine combustion chamber and its nozzle Download PDFInfo
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- CN206514340U CN206514340U CN201621260298.0U CN201621260298U CN206514340U CN 206514340 U CN206514340 U CN 206514340U CN 201621260298 U CN201621260298 U CN 201621260298U CN 206514340 U CN206514340 U CN 206514340U
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- gas outlet
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- cylindrical portion
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Abstract
The utility model discloses a kind of gas-turbine combustion chamber and its nozzle, including main burner, the main burner one inside blast tube of formation and the gas outlet being in fluid communication with the blast tube, the nozzle also includes outer nozzle wall, the outer nozzle wall includes outer nozzle wall cylindrical portion and the outer nozzle wall end positioned at the outer nozzle wall cylindrical portion end, the outer nozzle wall cylindrical portion is spaced around the main burner and diametrically to form air duct between the main burner and outer nozzle wall with the main burner, the air duct is in fluid communication with the gas outlet, the mixed gas outlet that the outer nozzle wall cylindrical portion formation is in fluid communication with the air duct, so that the combustion gas sprayed from the gas outlet sprays after being mixed with the air in the air duct from the mixed gas outlet.
Description
Technical field
The present invention relates to gas turbine, the more particularly to combustion chamber of gas turbine and its nozzle.
Background technology
In gas-turbine combustion chamber, fuel gas and air realize premixing and the change of velocity profile by nozzle, in nozzle
Outlet reaches rational VELOCITY DISTRIBUTION, and matches rational fuel-air mixture example, is burnt into combustion chamber, forms steady
Fixed flow field and combustion field.Mixed not in premixed channel however, existing gas-turbine combustion chamber nozzle has combustion gas and air
Uniform the problem of, combustion instability is so easily caused, produces more pollutant effulent, premixed channel is possible to occur back
Fire, the element such as valuable cyclone causes ablation and breaking-up to nozzle and in premixed channel.
During nozzle in gas-turbine combustion chamber is in jet flames to combustion chamber, it is possible to can be because in nozzle
Hypertonia, the flame for causing nozzle to eject can be directly injected to burner inner liner inwall or it is interior set on component, even
It is directly injected on adjacent nozzle, serious ablation and damage is caused to it, gas-turbine combustion chamber and its spray is substantially reduced
The service life of mouth.
Therefore, be badly in need of a kind of rationally effective gas-turbine combustion chamber structure and nozzle arrangements solve it is set forth above extremely
A kind of few problem.
The content of the invention
In view of this, the present invention proposes a kind of nozzle for the gas-turbine combustion chamber that can solve at least one above mentioned problem.
The present invention also proposes a kind of gas-turbine combustion chamber of application said nozzle.
A kind of nozzle of gas-turbine combustion chamber, including main burner, the main burner one inside blast tube of formation and
The gas outlet being in fluid communication with the blast tube, the nozzle also includes outer nozzle wall, and the outer nozzle wall includes nozzle
Outer wall cylindrical portion and the outer nozzle wall end positioned at the outer nozzle wall cylindrical portion end, the outer nozzle wall cylindrical portion are surround
The main burner and with the main burner be diametrically spaced so as between the main burner and outer nozzle wall formed air lead to
Road, the air duct is in fluid communication with the gas outlet, the outer nozzle wall cylindrical portion formation and the air duct stream
The logical mixed gas outlet of body phase so that the combustion gas sprayed from the gas outlet mixed with the air in the air duct after from
The mixed gas outlet sprays.
In one embodiment, the main burner includes main burner cylindrical portion and positioned at the main burner cylindrical portion end
Main burner end, the main burner cylindrical portion defines the internal blast tube, and the gas outlet is through main burner cylinder
Shape portion, the main burner end is blind end so that the combustion gas in the blast tube can only spray from the gas outlet.
In one embodiment, the gas outlet is located proximate to the blind end, and the gas outlet mixes with described
Gas outlet is diametrically corresponded to, and the internal blast tube is axially extended.
In one embodiment, the aperture of the gas outlet is less than the aperture of the mixed gas outlet.
In one embodiment, the outer nozzle wall end is provided with end through hole and in the axial direction between the main burner end
Separate.
In one embodiment, cyclone is formed in the air duct, so that the air formation rotation in the air duct
Stream.
In one embodiment, the main burner includes main burner cylindrical portion, and the cyclone includes being arranged on the main jet
Some blades on the outer peripheral face of mouth cylindrical portion.
In one embodiment, the inner peripheral surface of the outer peripheral face of the blade and the main burner cylindrical portion and outer nozzle wall is at least
One of them is fixedly connected.
In one embodiment, the quantity of the gas outlet and mixed gas outlet respectively corresponds to for two and respectively, and two
The gaseous mixture injection direction that mixed gas outlet is defined is opposite.
The present invention also proposes a kind of gas-turbine combustion chamber, including annular flame tube, and the annular flame tube forms annular
Combustion chamber, the annular firing chamber defines one axially and around the axial circumferencial direction；And it is arranged on the annular combustion
Some nozzles of intracavitary are burnt, some nozzles are evenly distributed along the circumferencial direction, the nozzle is used to be blended with combustion gas
The combustion chamber is sprayed into the gaseous mixture of air；Each nozzle is provided with least one mixed gas outlet, and the mixed gas outlet is determined
An adopted gaseous mixture injection direction, the gaseous mixture injection direction is towards the direction of an adjacent nozzle.
In one embodiment, each nozzle sets two mixed gas outlets, and described two mixed gas outlets define it is mixed
Close gas jet in opposite direction.
In one embodiment, the gaseous mixture injection direction is along the circumferencial direction.
In one embodiment, each nozzle includes：Main burner, the main burner is included along the axially extending main burner
Cylindrical portion, the main burner cylindrical portion endcapped, the main burner cylindrical portion has an inside blast tube and through institute
State the gas outlet of main burner cylindrical portion；Outer nozzle wall, the outer nozzle wall includes outer nozzle wall cylindrical portion, the outer nozzle wall
Cylindrical portion is diametrically spaced so as in main burner cylinder around the main burner cylindrical portion and with the main burner cylindrical portion
Annular air channel is formed between shape portion and outer nozzle wall cylindrical portion, the mixed gas outlet runs through the outer nozzle wall cylindrical portion
And it is diametrically corresponding with the gas outlet so that the combustion gas sprayed from the gas outlet and the sky in the air duct
Sprayed after gas mixing from the mixed gas outlet.
In summary, the invention provides a kind of gas-turbine combustion chamber and its nozzle, nozzle includes main burner and surround
The outer nozzle wall that main burner is set, main burner formation blast tube, outer nozzle wall is diametrically spaced with the two with main burner
Between formed to set on air duct, main burner and set corresponding with gas outlet gaseous mixture to go out on gas outlet, outer nozzle wall
Mouthful so that the combustion gas that gas outlet sprays sprays after being mixed with the air in air duct from mixed gas outlet, each nozzle
The injection direction of mixed gas outlet is towards adjacent nozzle.The present invention nozzle arrangements it is ingenious in design, can preferably air mixture and
Air, and gaseous mixture is spurted into the combustion chamber of combustion chamber burnt, it is to avoid infringement of the thermal-flame to flame tube wall.
The gas-turbine combustion chamber of the present invention is simple in construction, novel, can at utmost reduce the damage to each element in combustion chamber, carry
The efficiency of combustion of high combustion chamber, reduces production cost.
Brief description of the drawings
Fig. 1 is schematic top plan view of the combustion chamber of one embodiment of the invention along a lateral cross section.
Fig. 2 is the flame drum outer wall of combustion chamber in Fig. 1 and the structural representation of inwall.
Fig. 3 is the side view of the nozzle of combustion chamber in Fig. 1.
Fig. 4 is the longitudinal sectional view of nozzle in Fig. 3.
Fig. 5 is schematic top plan view of the combustion chamber of another embodiment of the present invention along a lateral cross section.
Fig. 6 is the structural representation of the flame drum outer wall of combustion chamber in Fig. 5.
Fig. 7 is the flame drum outer wall of combustion chamber in Fig. 5 and the structural representation of inwall.
Fig. 8 is elevational schematic view of the combustion chamber along a lateral cross section in Fig. 5.
Fig. 9 is the longitudinal sectional view of the hollow body structure of combustion chamber in Fig. 5.
Figure 10 is the simplification of the fuel gas flow and air draught formation quadrangle tangential circle of the combustion chamber of another embodiment of the present invention
Schematic diagram.
Figure 11 is the structural representation of another embodiment of nozzle arrangements in above-described embodiment.
Figure 12 is the enlarged diagram of the part-structure of nozzle in Figure 11.
Figure 13 is the schematic top plan view of nozzle arrangements in Figure 11.
Embodiment
Before describing the embodiments in more detail, it should be understood that the invention is not restricted to institute hereafter or in accompanying drawing in the application
The detailed construction or arrangement of elements of description.The embodiment that the present invention can realize for other manner.Furthermore, it is to be understood that this paper institutes
The wording and term used is solely for describing purposes, should not the explanation of being construed as limiting property." comprising " used herein, "comprising",
The similar wording such as " having " is meant comprising items listed thereafter, its equivalent and other additional things.Particularly, description is worked as
When " certain element ", the quantity that the present invention does not limit the element can also include multiple as one.
As depicted in figs. 1 and 2, the present invention provides a kind of gas-turbine combustion chamber, and the combustion chamber includes annular flame tube
10 and some nozzles 12, the formation annular firing of annular flame tube 10 chamber 14, some nozzles 12 are arranged in annular firing chamber 14, if
Dry nozzle 12 is used to be blended with combustion gas and the gaseous mixture of air is sprayed into annular firing chamber 14.More specifically, in shown reality
Apply in example, annular flame tube 10 includes having radially spaced outer ring burner inner liner 16 and inner ring burner inner liner 18, and combustion chamber 14 is formed
Between inner ring burner inner liner 18 and outer ring burner inner liner 16.
Annular firing chamber 14 defines one axially and around the axial circumferencial direction, and some nozzles 12 are fixed on burner inner liner
On 10 end wall, arranged along the circumferencial direction and along described axially extending.Preferably, some nozzles 12 are along the circumference side
To evenly distributed.
As shown in Figure 3 and Figure 4, nozzle 12 includes main burner 20 and the outer nozzle wall 22 set around main burner 20, main jet
Mouth 20 formation one inside blast tube 24 and with internal blast tube 24 be in fluid communication gas outlet 26, outer nozzle wall 22 with
Air duct 28 is formed between main burner 20, gas outlet 26 is in fluid communication with air duct 28, set on outer nozzle wall 22 and
At least mixed gas outlet 30 that air duct 28 is in fluid communication, to cause the combustion gas and the air duct that are sprayed from gas outlet 26
Sprayed after air mixing in 28 from mixed gas outlet 30.
Specifically, main burner 20 includes main burner cylindrical portion 32 and the main burner positioned at the end of main burner cylindrical portion 32
End 34, wherein main burner cylindrical portion 32 define internal blast tube 24, and internal blast tube 24 is along described axially extending, main jet
The fuel gas inlet end of mouth cylindrical portion 32 is connected with outer combustion gas conveyance conduit, to receive external combustion gas.Main burner end 34 is envelope
Closed end, to cause the combustion gas in blast tube 24 to be sprayed from gas outlet 26.
In an illustrated embodiment, gas outlet 26 is set through main burner cylindrical portion 32, and the quantity of gas outlet 26 is
Two, the direction that two gas outlets 26 are respectively facing adjacent nozzle is set, and sets gas outlet 26 to be located proximate to main jet
Mouth end 34, i.e., described blind end.
Outer nozzle wall 22 includes outer nozzle wall cylindrical portion 36 and the outer nozzle wall positioned at the end of outer nozzle wall cylindrical portion 36
End 38, outer nozzle wall cylindrical portion 36 around main burner 20 and being diametrically spaced with main burner 20 so that main burner 20 with
Air duct 28 is formed between outer nozzle wall 22, air duct 28 is in fluid communication with gas outlet 26.In an illustrated embodiment,
Outer nozzle wall end 38 is spaced apart on the axial direction with main burner end 34, therefore, and air duct 28 also includes outer nozzle wall
The space formed between end 38 and main burner end 34.
Each nozzle 12 is provided with least one mixed gas outlet 30, namely is formed and air in outer nozzle wall cylindrical portion 36
At least mixed gas outlet 30 that passage 28 is in fluid communication.Specifically, mixed gas outlet 30 runs through outer nozzle wall cylindrical portion 36
And it is diametrically corresponding with gas outlet 26, to cause the combustion gas sprayed from gas outlet 26 and the air in air duct 28 to mix
Sprayed after conjunction from mixed gas outlet 30.
In an illustrated embodiment, the quantity of the mixed gas outlet 30 formed in outer nozzle wall cylindrical portion 36 is two, and
And two mixed gas outlets 30 are diametrically corresponding with two gas outlets 26 respectively, to spray from two gas outlets 26
Combustion gas mixed with the air in air duct 28 after sprayed respectively from two mixed gas outlets 30.
Each mixed gas outlet 30 defines a gaseous mixture injection direction, and in an illustrated embodiment, each nozzle 12 is set
Two gas outlets 26 and two mixed gas outlets 30, two gas outlets 26 respectively with two mixed gas outlets 30 diametrically
Correspondence, and the gaseous mixture injection direction that two mixed gas outlets 30 are defined is opposite.In the present embodiment, the gaseous mixture injection direction
Approximately along the circumferencial direction.Specifically, the gaseous mixture injection direction be towards the direction of an adjacent nozzle 12, because
This, the gaseous mixture injection direction of two mixed gas outlets 30 of each nozzle 12 is respectively facing two nozzles adjacent with the nozzle 12
Direction.
In an illustrated embodiment, outer nozzle wall end 38 is provided with end through hole 40, and end through hole 40 is simultaneously logical with air
Road 28 and annular firing chamber 14 are in fluid communication, therefore, and the air in air duct 28 can flow to annular firing from end through hole 40
In chamber 14, to form the overall flow of air in air duct 28, the cooling of wall 36 and end 38 is carried out.
In an illustrated embodiment, the gas outlet 26 and mixed gas outlet 30 of the formation of nozzle 12 are disposed as circle, and
The aperture of gas outlet 26 is less than the aperture of mixed gas outlet 30, and the jet-flow of such formation of gas outlet 26 can pass through
The effect of injection air is formed during mixed gas outlet 30, promotes the combustion gas by mixed gas outlet 30 and the mixing of air, and then
Promote burning and the short flamed length that contracts.
As described above, the injection direction of the gaseous mixture ejected from mixed gas outlet 30 is towards an adjacent nozzle 12
Direction, when flame pressure is larger, the gaseous mixture flame that either gaseous mixture is produced ejected from mixed gas outlet 30 can
It can be directly injected on adjacent nozzle 12, can so produce larger infringement to nozzle 12 so that nozzle 12 is easily damaged.For
The generation of such case is avoided, in order to more steadily solve the above problems, the present invention has been carried out further to combustion chamber
Improve, and propose two kinds of embodiments.
Embodiment one：
As shown in figures 5-9, the flame that the combustion chamber also includes being used to prevent gaseous mixture or gaseous mixture from producing directly sprays
Some flame barrier structures on to adjacent nozzle 12, specifically, set a fire between the adjacent nozzle 12 of each two
Flame barrier structure.
As it was previously stated, each nozzle 12 sets two mixed gas outlets 30, and the mixing that two mixed gas outlets 30 are defined
Gas jet is in opposite direction.It refer to Fig. 5, the mixing gas jet side of the two relative mixed gas outlets 30 of the nozzle 12 of arbitrary neighborhood two
To with an intersection point, the flame barrier structure setting is in the point of intersection, to stop the gaseous mixture of the injection of mixed gas outlet 30
The flame of generation.
The flame barrier structure includes a hollow body 42, and hollow body 42 has hollow body wall portion 44 and by hollow body wall
The internal cavities 46 that portion 44 is formed.Hollow body 42 is set along the axial direction, and an axial end portion of hollow body 42 is fixed on fire
On flame cylinder 10, being fixed with that end wall of nozzle 12 for burner inner liner 10 is specifically integrally fixed at.The axial direction of hollow body 42
End is hatch frame, to be connected with extraneous air, for receiving the cooling air outside burner inner liner 10, and then causes cooling empty
Gas is full of internal cavities 46.
Such as Fig. 9, another axial end portion 48 and hollow body wall portion 44 of hollow body 42 are equipped with and the fluid phase of internal cavities 46
Logical some through holes.Using this loose structure, the air of the internal cavities 46 of hollow body 42 can pass through hollow body wall portion 44
With axial end portion 48, flame barrier structure is protected not to be burned out.The air of internal cavities 46 can also pass through hollow body wall portion simultaneously
44 and axial end portion 48 on through hole enter annular firing chamber 14 in, to cause the fuel gas buring in annular firing chamber 14 more to fill
Point.
Hollow body 42 has the blocking surface towards adjacent nozzle 12, and the blocking surface is that flame is contacted with hollow body 42
Surface, be respectively provided with a nozzle 12 along the both sides of each hollow body 42 of the circumferencial direction, therefore each hollow body 42 has two
Individual blocking surface.When the flame of a wherein nozzle 12 sprays towards another adjacent nozzle, its flame is ejected into hollow body 42
It is blocked on blocking surface.Because hollow body wall portion 44 is loose structure, the cooling air of hollow body internal cavities 46 can be worn
Cross the through hole of hollow body wall portion 44 and axial end portion 48 and barrier air film is formed on blocking surface and end outer surface, protect hollow
Body 42 is not burned out.In the present embodiment, the blocking surface is designed as arcwall face, for example, hollow body 42 is designed as into open circles
Cylinder 42.In other embodiments, hollow body 42 can also have other shapes, such as Elliptic Cylinder, cuboid, polyhedron etc.
Deng as long as the wherein flame of a nozzle can be stopped and be unlikely to be ejected into an adjacent nozzle.
Please continue to refer to Fig. 5, each nozzle 12 has two mixed gas outlets 30, each mixed gas outlet 30 towards a pair
The injection gaseous mixture of adjacent hollow body 42 answered, each mixed gas outlet 30 has a center line, and hollow cylinder 42 has parallel
In the axial center line, the center line of each mixed gas outlet 30 passes through hollow body 42 corresponding with the mixed gas outlet 30
Center line, that is to say, that the center line of each hollow body 42 is located at the two relative mixed gas outlets 30 of adjacent two nozzle 12
Gaseous mixture injection direction, namely on the intersection point of its center line.
Fig. 8 is refer to, in a radial section, the center of all hollow bodies 42 is centrally located at same with all nozzles 12
On individual circle.Certainly, in other embodiments, hollow body 42 can also be set otherwise in a circumferential direction with nozzle 12
Put, be not necessarily positioned on same circle.
Embodiment two：
As shown in Figure 10, exemplified with a part of structure of annular flame tube 10, including outer ring burner inner liner 16, inner ring burner inner liner
18th, the combustion chamber 14 being formed between inner ring burner inner liner 18 and outer ring burner inner liner 16 and some sprays being arranged in combustion chamber 14
Mouth.Each nozzle is provided with the first mixed gas outlet and the second mixed gas outlet, and each mixed gas outlet defines an injection direction.On
The construction for stating annular flame tube 10 and nozzle 12 can be identical with the construction in previous embodiment, therefore will not be repeated here.
It is described in detail below by taking two nozzles of arbitrary neighborhood as an example.
Two nozzles of the arbitrary neighborhood include first jet 12a and second nozzle 12b, and first jet 12a includes the
One mixed gas outlet 50 and the second mixed gas outlet 52, second nozzle 12b include the first mixed gas outlet 54 and the second gaseous mixture
Outlet 56.Wherein first jet 12a the first mixed gas outlet 50 is located at towards second nozzle 12b side, second nozzle 12b
The second mixed gas outlet 56 be located at towards first jet 12a side.
Outer ring burner inner liner 16 is provided with the first air stream injection structure 62, and the first air stream injection structure 62 is used to spray direction
First air stream 66 of inner ring burner inner liner 18, the first air stream 66 defines one first airflow direction.Inner ring burner inner liner 18 is provided with
Second air stream injection structure 64, the second air stream injection structure 64 is used to spray the second air stream towards outer ring burner inner liner 16
68, the second air stream 68 defines one second airflow direction.
In a radial section, first jet 12a the first mixed gas outlet 50 defines one first injection direction 58, first
Injection direction 58 is towards one of inner ring burner inner liner 18 and outer ring burner inner liner 16 lateral deviation from first jet 12a and second nozzle
Line L between 12b center.Second nozzle 12b the second mixed gas outlet 56 defines one second injection direction 60, the second spray
Penetrate direction 60 and deviate first jet 12a and second nozzle 12b towards inner ring burner inner liner 18 and the wherein opposite side of outer ring burner inner liner 16
Center between line L.
It should be appreciated that the injection direction of above-mentioned first air stream 66 is the first airflow direction, the second air stream
68 injection direction is the second airflow direction, the first mixed gas outlet 50 of mixed airflow or flame along first jet 12a
The direction of ejection is the first injection direction 58, and mixed airflow or flame spray along second nozzle 12b the second mixed gas outlet 56
The direction gone out is the second injection direction 60.
First jet 12a the first mixed gas outlet 50, second nozzle 12b the second mixed gas outlet 56, the first air
The air stream injection structure 64 of injection structure 62 and second is flowed to arrange in quadrangle tangential circle.In other words, sprayed along the first injection direction 58
The mixed airflow or flame penetrated, the mixed airflow or flame that are sprayed along the second injection direction 60, the first air stream 66 and second are empty
Air-flow 68 is surrounded in quadrangle tangential circle.
In embodiment as shown in Figure 10, the first injection direction 58 deviates first jet 12a towards outer ring burner inner liner 16
Line L between second nozzle 12b center, the first injection direction 58 deviates first jet 12a and second nozzle 12b circle
The angle of line L between the heart is 1 ° -15 °.Second injection direction 60 deviates first jet 12a and the towards inner ring burner inner liner 18
Line L between the two nozzle 12b center of circle, the second injection direction 60 deviate first jet 12a and second nozzle 12b center it
Between line L angle be 1 ° -15 °.
It should be appreciated that in other embodiments, according to design requirement, the first injection direction 58 can also be towards inner ring
Burner inner liner 18 deviates the line L between the first jet 12a and second nozzle 12b center of circle, and the second injection direction 60 can also court
Deviate the line L between the first jet 12a and second nozzle 12b center of circle to outer ring burner inner liner 16, as long as can cause along first
The mixed airflow or flame of the injection of injection direction 58, the mixed airflow or flame, the first air sprayed along the second injection direction 60
The air stream 68 of stream 66 and second surrounds the air-flow to be formed in quadrangle tangential circle, and the present invention is not limited this.
In an illustrated embodiment, the first air stream injection structure 62 is one or more on outer ring burner inner liner 16 to be located at
Pressure-air outside first stomata 62, burner inner liner is sprayed by first stomata 62 into combustion chamber 14 towards inner ring burner inner liner
Penetrate first air stream 66.Similarly, the second air stream injection structure 64 is one or more on inner ring burner inner liner 18 to be located at
Pressure-air outside second stomata 64, burner inner liner is sprayed by second stomata 64 into combustion chamber 14 towards outer ring burner inner liner
Second air stream 68.In addition, inner ring burner inner liner 18 and outer ring burner inner liner 16 are provided with some Cooling Holes run through, it is outer to cause
Portion's air can enter in combustion chamber 14 through Cooling Holes in burner inner liner wall formation air film, obstruct thermal-flame.
In the present embodiment, the aperture of the first stomata 62 and the second stomata 64 is more than the aperture of Cooling Holes, its concrete numerical value root
Designed according to aerodynamic parameter.
The carrying out practically principle of the quadrangle tangential circle is：First jet 12a the first mixed gas outlet 50 spray along the
The first flame that one injection direction 58 advances intersects with the first air stream 66 sprayed from the first air stream injection structure 62, and first
The direct of travel that air stream 66 can change the first flame is the first airflow direction, because the first flame has necessarily in itself
Along the traveling momentum of the first injection direction 58, thus two strands of air-flows it is intersecting after advanced along a curved path.The of second nozzle 12b
The second flame advanced along the second injection direction 60 that two mixed gas outlets 56 spray from the second air stream injection structure 64 with spraying
The second air stream 68 gone out intersects, and the direct of travel that the second air stream 68 can change the second flame is the second airflow direction,
Because the second flame has certain traveling momentum along the second injection direction 60 in itself, thus two strands of air-flows it is intersecting after along another
Curved path is advanced.Two curved paths surround to form a quadrangle tangential circle path, in the first air stream 66 and the second air stream 68
Under effect, mixed air-flow is circulated along the quadrangle tangential circle path, and the centre position between adjacent nozzle forms eddy flow, effectively keeps away
Exempt from the flame that mixed gas outlet ejects to be directly injected on adjacent nozzle 12.Meanwhile, this eddy flow is equivalent to shorter
Axial space in elongated the length of flame, hence in so that burning is more abundant, discharge is more preferable, also causes the axial chi of combustion chamber
Very little further to reduce, final gas turbine can also have smaller axial dimension.
As figs 11-13, in order that obtaining combustion gas and air can more uniformly mix, in the air duct 28 of nozzle 12
One cyclone 74 is set, to cause the air formation eddy flow in air inlet passage 28, increases air flow intensity, can
Quickly and evenly mixed with combustion gas, efficiency of combustion is improved, so as to reduce the discharge of nitrogen oxides.In an illustrated embodiment, revolve
Stream device 74 includes some blades 76 being arranged on the outer peripheral face of main burner cylindrical portion 32, and the inner side of blade 76 is fixedly connected on master
On the outer peripheral face of nozzle cylindrical portion 32, the outside of blade 76 is fixedly attached on the inner peripheral surface of outer nozzle wall cylindrical portion 36.At it
In its non-illustrated embodiment, blade can also only with the inner peripheral surface of the outer peripheral face of the main burner cylindrical portion and outer nozzle wall its
One of be fixedly connected.
It should be appreciated that cyclone 74 is embodied as arc strip blade 76 in the present embodiment, in other embodiments,
Cyclone 74 can also implement into other structures, as long as can cause the air formation eddy flow in air duct.
In summary, the invention provides a kind of gas-turbine combustion chamber and its nozzle, nozzle includes main burner and surround
The outer nozzle wall that main burner is set, main burner formation blast tube, outer nozzle wall is diametrically spaced with the two with main burner
Between formed to set on air duct, main burner and set corresponding with gas outlet gaseous mixture to go out on gas outlet, outer nozzle wall
Mouthful so that the combustion gas that gas outlet sprays sprays after being mixed with the air in air duct from mixed gas outlet, each nozzle
The injection direction of mixed gas outlet is towards adjacent nozzle.The present invention nozzle arrangements it is ingenious in design, can preferably air mixture and
Air, and gaseous mixture is spurted into the combustion chamber of combustion chamber burnt, it is to avoid infringement of the thermal-flame to flame tube wall.
Secondly, some flame barrier structures are also set up in certain embodiments, in combustion chamber, and flame barrier structure setting is in adjacent two sprays
Between mouth, damage is produced to it to prevent the flame ejected from nozzle from being directly injected on adjacent nozzle, extends combustion chamber
Service life.Again, in certain embodiments, combustion chamber can also set air stream on outer ring burner inner liner and inner ring burner inner liner
Injection structure, air stream injection structure is configured to air stream and the two relative mixed gas outlets of adjacent two nozzle that it is ejected
The flame formation quadrangle tangential circle ejected, air stream can change the direct of travel of jet flames, and then be followed along the quadrangle tangential circle
Ring is operated, and is prevented effectively from jet flames and combustion chamber and nozzle are caused to damage, improve the fuel gas buring efficiency in combustion chamber.This hair
Bright gas-turbine combustion chamber is simple in construction, novel, can at utmost reduce the damage to each element in combustion chamber, improves combustion
The efficiency of combustion of room is burnt, production cost is reduced.
Concepts described herein may be embodied to other forms in the case of without departing from its spirit and characteristic.It is disclosed
Specific embodiment should be considered as exemplary rather than restricted.Therefore, the scope of the present invention be by appended claim,
Rather than be determined according to these descriptions before.Any change in the letter and equivalency range of claim is all
The scope of these claims should be belonged to.
Claims (10)
1. a kind of nozzle of gas-turbine combustion chamber, including main burner, the main burner one inside blast tube of formation and with
The gas outlet that the blast tube is in fluid communication, it is characterised in that the nozzle also includes：
Outer nozzle wall, the outer nozzle wall includes outer nozzle wall cylindrical portion and the spray positioned at the outer nozzle wall cylindrical portion end
Mouth outer wall end, the outer nozzle wall cylindrical portion is diametrically spaced so as in institute around the main burner and with the main burner
State and air duct is formed between main burner and outer nozzle wall, the air duct is in fluid communication with the gas outlet, the spray
The mixed gas outlet that the formation of mouth outer wall cylindrical portion is in fluid communication with the air duct so that the combustion sprayed from the gas outlet
Gas sprays after being mixed with the air in the air duct from the mixed gas outlet.
2. the nozzle of gas-turbine combustion chamber as claimed in claim 1, it is characterised in that the main burner includes main burner cylinder
Shape portion and the main burner end positioned at the main burner cylindrical portion end, the main burner cylindrical portion define the internal combustion gas
Passage, the gas outlet runs through the main burner cylindrical portion, and the main burner end is blind end so that the blast tube
Interior combustion gas can only spray from the gas outlet.
3. the nozzle of gas-turbine combustion chamber as claimed in claim 2, it is characterised in that the gas outlet is located proximate to
The blind end, the gas outlet is diametrically corresponding with the mixed gas outlet, and the aperture of the gas outlet is less than institute
The aperture of mixed gas outlet is stated, the internal blast tube is axially extended.
4. the nozzle of gas-turbine combustion chamber as claimed in claim 2, it is characterised in that the outer nozzle wall end is provided with end
Portion's through hole is simultaneously spaced apart with the main burner end in the axial direction.
5. the nozzle of gas-turbine combustion chamber as claimed in claim 1, it is characterised in that eddy flow is formed in the air duct
Device, so that the air formation eddy flow in the air duct.
6. the nozzle of gas-turbine combustion chamber as claimed in claim 5, it is characterised in that the main burner includes main burner cylinder
Shape portion, the cyclone includes some blades being arranged on the outer peripheral face of the main burner cylindrical portion.
7. the nozzle of gas-turbine combustion chamber as claimed in claim 1, it is characterised in that the gas outlet and gaseous mixture go out
The quantity of mouth respectively corresponds to for two and respectively, and the gaseous mixture injection direction that two mixed gas outlets are defined is opposite.
8. a kind of gas-turbine combustion chamber, including：
Annular flame tube, the annular flame tube formation annular firing chamber, the annular firing chamber defines one axially and around institute
State axial circumferencial direction；And
Some nozzles of the annular firing intracavitary are arranged on, some nozzles are evenly distributed along the circumferencial direction, described
Nozzle is used to be blended with combustion gas and the gaseous mixture of air sprays into the combustion chamber, and the nozzle includes main burner, the main jet
Mouth one inside blast tube of formation and the gas outlet being in fluid communication with the blast tube；
Characterized in that, the nozzle also includes outer nozzle wall, the outer nozzle wall includes outer nozzle wall cylindrical portion, the nozzle
Outer wall cylindrical portion is diametrically spaced so as in the main burner and outer nozzle wall around the main burner and with the main burner
Between form air duct, the air duct is in fluid communication with the gas outlet, and each nozzle is provided with least one mixing
Gas is exported, and at least one described mixed gas outlet is formed in the outer nozzle wall cylindrical portion, the mixed gas outlet with it is described
Air duct is in fluid communication, and the mixed gas outlet defines a gaseous mixture injection direction, the gaseous mixture injection direction be towards
The direction of one adjacent nozzle.
9. gas-turbine combustion chamber as claimed in claim 8, it is characterised in that each nozzle sets two mixed gas outlets,
And the gaseous mixture injection direction that described two mixed gas outlets are defined is opposite.
10. gas-turbine combustion chamber as claimed in claim 9, it is characterised in that
The main burner is included along the axially extending main burner cylindrical portion, and the main burner cylindrical portion endcapped is described
Blast tube is formed at the inside of the main burner cylindrical portion, and the gas outlet runs through the main burner cylindrical portion,
The outer nozzle wall is included positioned at the outer nozzle wall end of the outer nozzle wall cylindrical portion end, the outer nozzle wall tubular
Portion is diametrically spaced so as in the main burner cylindrical portion around the main burner cylindrical portion and with the main burner cylindrical portion
Form annular air channel between outer nozzle wall cylindrical portion, the mixed gas outlet through the outer nozzle wall cylindrical portion and with
The gas outlet is diametrically corresponded to so that the combustion gas sprayed from the gas outlet is mixed with the air in the air duct
Sprayed after conjunction from the mixed gas outlet.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402934A (en) * | 2016-11-21 | 2017-02-15 | 深圳智慧能源技术有限公司 | Gas turbine combustion chamber and nozzle thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402934A (en) * | 2016-11-21 | 2017-02-15 | 深圳智慧能源技术有限公司 | Gas turbine combustion chamber and nozzle thereof |
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