CN115218217B - Main combustion stage head of central staged combustion chamber adopting porous multi-angle oil injection ring structure - Google Patents
Main combustion stage head of central staged combustion chamber adopting porous multi-angle oil injection ring structure Download PDFInfo
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- CN115218217B CN115218217B CN202210721433.0A CN202210721433A CN115218217B CN 115218217 B CN115218217 B CN 115218217B CN 202210721433 A CN202210721433 A CN 202210721433A CN 115218217 B CN115218217 B CN 115218217B
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- sleeve
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- annular cavity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
Abstract
The invention relates to the technical field of combustion chambers, and provides a main combustion stage head of a central grading combustion chamber adopting a porous multi-angle oil injection ring structure, which comprises a first sleeve, a second sleeve, a first swirl vane and an annular piece; the second sleeve is sleeved on the outer side of the first sleeve, and an air inlet channel is formed between the first sleeve and the second sleeve; a first annular cavity is formed between the first swirl vane and the first sleeve, and the annular piece is provided with a second annular cavity; the first swirl vane is provided with a third annular cavity; the inner wall surface of the annular piece is provided with a first through hole, and the first annular cavity, the second annular cavity and the third annular cavity are sequentially communicated and arranged and can form a first oil injection channel with the first through hole. The main combustion stage head of the central grading combustion chamber adopting the porous multi-angle oil injection ring structure injects fuel to the air inflow injected from the air inlet channel through the first oil injection channel, so that the uniformity of oil-gas mixing is effectively ensured, and the central grading combustion chamber is simple in structure, convenient to assemble and low in processing cost.
Description
Technical Field
The invention relates to the technical field of combustion chambers, in particular to a main combustion stage head of a central grading combustion chamber adopting a porous multi-angle oil injection ring structure.
Background
Along with the continuous enhancement of environmental awareness, various industries have own standards and requirements for environmental protection, and in the aviation transportation industry, the international civil aviation organization issues corresponding navigable regulations, wherein strict requirements are made on pollution emissions of civil large airplanes. Among them, the combustion chamber of the aircraft engine is a source of aircraft power and also a main source of pollution emission thereof, and thus, the low-emission combustion technology is one of the important points of current researches.
Lean premixed combustion is currently the mainstream low emission combustion technology of aeroengines, achieving lower nitrogen oxide emissions by reducing the overall temperature of the flame, with a central staged combustion chamber being one of the common configurations therein. The central staged burners are staged in radial direction along the central axis: the central inner ring is a precombustion stage, and a small part of air enters the burner through the precombustion stage and directly enters the combustion chamber with fuel oil sprayed out by the downstream central body nozzle for combustion, so that the characteristics of rich oil diffusion combustion are presented, and the stability and the flameout performance of the overall flame are ensured; the outer ring is the main combustion stage, most air enters the burner through the main combustion stage, and enters the combustion chamber for combustion after being mixed with fuel oil injected into the channel to a certain extent in advance, so lean oil premixed combustion is presented, and the output of the finally generated emissions of the combustion can be ensured to reach a lower level.
In the design of the main combustion stage of the central staged combustor, it is necessary to ensure that the mixture of fuel and air reaches a good degree of blending in the main combustion stage passage to ensure uniform concentration distribution of the reactants. However, the length of the main combustion stage channel of the existing combustion chamber is limited, and after fuel is injected into the channel, a series of processes such as liquid mist breaking, mixing and evaporation are needed, so that the main combustion stage reactant cannot reach the full premixing degree, the oil-gas mixing degree is low, and the lower emission level is difficult to realize.
Disclosure of Invention
The invention provides a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure, which is used for solving the defects of low oil-gas mixing degree and poor low emission effect in the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure in the prior art.
The invention provides a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure, which comprises the following components: the first sleeve, the second sleeve, the first swirl vane and the annular piece;
the second sleeve is sleeved on the outer side of the first sleeve, an air inlet channel is formed between the first sleeve and the second sleeve, and the first swirl vanes and the annular piece are sequentially arranged in the air inlet channel along the radial direction of the first sleeve;
a first annular cavity is formed between the first swirl vane and the first sleeve, the annular piece is provided with a second annular cavity, and the first annular cavity and the second annular cavity are both arranged along the axial extension direction of the first sleeve; the first swirl vanes are provided with third annular cavities which are arranged along the radial extending direction of the first sleeve; the inner wall surface of the annular piece is provided with a first through hole, and the first annular cavity, the second annular cavity and the third annular cavity are sequentially communicated and arranged and can form a first oil injection channel with the first through hole.
According to the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure, the first swirl vane comprises a first connecting part and a second connecting part;
the inner wall surface of the first connecting part is sleeved on the outer wall surface of the first sleeve, the outer wall surface of the first sleeve is provided with a circumferentially through concave part, and the concave part and the inner wall surface of the first connecting part are surrounded to form the first annular cavity;
the second connecting portion is connected to the outer wall surface of the first connecting portion, a first oil injection space is formed between the annular piece and the second connecting portion, and the position of the first through hole is matched with the first oil injection space.
According to the central staged combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, a plurality of second connecting parts are arranged, and the second connecting parts are sequentially distributed along the circumferential direction of the first connecting part.
According to the central staged combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the outer wall surface of the ring-shaped piece is provided with the second through hole, and the first annular cavity, the second annular cavity and the third annular cavity can form a second oil injection channel with the second through hole.
According to the central staged combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the main combustion stage head device further comprises a second swirl vane; the second swirl vanes are disposed between the second sleeve and the annular member.
According to the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure, the second swirl vane comprises a third connecting part and a fourth connecting part;
the outer wall surface laminating of third connecting portion is located the telescopic inner wall surface of second, fourth connecting portion connect in the inner wall surface of third connecting portion, the ring piece through with fourth connecting portion with build between the third connecting portion and be formed with the second oil spout space, the position of second through-hole with second oil spout space assorted.
According to the central staged combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the number of the fourth connecting parts is multiple, and the fourth connecting parts are sequentially distributed along the circumferential direction of the third connecting part.
According to the central grading combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the number of the first through holes and the second through holes is multiple; the plurality of first through holes are arranged on the inner side wall of the annular piece along the circumferential direction of the annular piece, and the plurality of second through holes are arranged on the outer side wall of the annular piece along the circumferential direction of the annular piece.
According to the central staged combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the main combustion stage head device further comprises an oil way joint nozzle, and an oil outlet of the oil way joint nozzle is in through connection with the first annular cavity.
According to the central grading combustion chamber main combustion stage head adopting the porous multi-angle oil injection ring structure, the main combustion stage head device further comprises a guide piece, wherein the guide piece is in an annular shape and is connected to one side of the annular piece, which is opposite to the oil way joint.
The invention provides a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure, which is sleeved with a first sleeve and a second sleeve to form an air inlet channel, and meanwhile, a first swirl vane and an annular piece are arranged between the first sleeve and the second sleeve, a first annular cavity is formed between the first swirl vane and the first sleeve, the annular piece is provided with a second annular cavity, the first swirl vane is provided with a third annular cavity, the first annular cavity, the second annular cavity and the third annular cavity are sequentially communicated, and a first oil injection channel is formed together with a first through hole positioned on the annular piece, and fuel is injected into air incoming flow injected from the air inlet channel through the first oil injection channel so as to realize uniform mixing of oil and gas; simultaneously, the air inlet channel and the first oil injection channel are mutually independent, and the corresponding air inlet amount, air inlet rate, oil injection amount and oil injection rate can be independently controlled. Therefore, the main combustion stage head of the central grading combustion chamber adopting the porous multi-angle oil injection ring structure can effectively ensure the uniformity of oil-gas mixing, and has the advantages of simple structure, convenient assembly, easy processing and low processing cost.
In addition to the technical problems, features of the constituent technical solutions and advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and advantages brought by the technical features of the technical solutions will be further described with reference to the accompanying drawings or will be understood through practice of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil injection ring structure in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of a main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil injection ring structure in accordance with an embodiment of the present invention;
FIG. 3 is one of the schematic cross-sectional views of a main stage head of a central staged combustor employing a multi-hole multi-angle injection ring structure provided by an embodiment of the present invention;
FIG. 4 is a second schematic cross-sectional view of a main stage head of a central staged combustor employing a multi-hole multi-angle injection ring configuration in accordance with an embodiment of the present invention;
FIG. 5 is a partial schematic view of the portion I in FIG. 4;
reference numerals:
1: a first sleeve; 2: a second sleeve; 3: a first swirl vane; 31: a first connection portion; 32: a second connecting portion; 33: a third annular cavity; 4: a first annular cavity; 5: a ring member; 51: a second annular cavity; 52: a first through hole; 53: a second through hole; 6: a second swirl vane; 61: a third connecting portion; 62: a fourth connecting portion; 7: an oil way joint mouth; 8: a flow guide; a: an air intake passage; b: the first oil injection space; c: and the second oil injection space.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.
Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Furthermore, in the description of the embodiments of the present invention, unless otherwise indicated, the meaning of "a plurality of", "a plurality of" means two or more, and the meaning of "a plurality of", "a plurality of" means one or more ".
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The following describes a main stage head of a central stage combustion chamber using a multi-hole multi-angle oil injection ring structure according to an embodiment of the present invention with reference to fig. 1 to 5.
As shown in fig. 1 and 2, a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure in an embodiment of the present invention includes: the first sleeve 1, the second sleeve 2, the first swirl vanes 3 and the annular member 5.
The second sleeve 2 is sleeved outside the first sleeve 1, an air inlet channel A is formed between the first sleeve 1 and the second sleeve 2, and the first swirl vanes 3 and the annular piece 5 are sequentially arranged in the air inlet channel A along the radial direction of the first sleeve 1.
A first annular cavity 4 is formed between the first swirl vane 3 and the first sleeve 1, the annular piece 5 is provided with a second annular cavity 51, and the first annular cavity 4 and the second annular cavity 51 are both arranged along the axial extension direction of the first sleeve 1; the first swirl vane 3 is provided with a third annular cavity 33, and the third annular cavity 33 is arranged along the radial extension direction of the first sleeve 1; the inner wall surface of the annular member 5 is provided with a first through hole 52, and the first annular cavity 4, the second annular cavity 51 and the third annular cavity 33 are sequentially and penetratingly arranged and can form a first oil injection channel with the first through hole 52.
Specifically, as shown in fig. 3, the overall structure of the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure is cylindrical, that is, the first sleeve 1, the second sleeve 2, the first swirl vane 3 and the annular member 5 are all in annular structures.
As shown in fig. 1, the first sleeve 1 is disposed on the innermost layer of the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure, and the first swirl vane 3, the annular member 5 and the second sleeve 2 are sequentially sleeved on the outer side of the first sleeve 1 along the radial extension direction of the first sleeve 1.
The axial extension lengths of the first sleeve 1 and the second sleeve 2 are approximately the same, the axial extension lengths of the first swirl vane 3 and the annular piece 5 are smaller than the lengths of the first sleeve 1 and the second sleeve 2, as shown in fig. 1, a containing space is formed between the first sleeve 1 and the second sleeve 2, and the first swirl vane 3 and the annular piece 5 are arranged at the left side of the containing space.
As shown in fig. 3, a first annular cavity 4 is formed between the inner wall surface of the first swirl vane 3 and the outer side wall of the first sleeve 1, as shown in fig. 5, a second annular cavity 51 is provided in the first swirl vane 3, as shown in fig. 4, a third annular cavity 33 is provided in the annular member 5, and the three cavities are communicated to form a first oil path.
As shown in fig. 5, the annular member 5 further has a first through hole 52, the first through hole 52 communicates with the third annular chamber 33, and fuel can be injected between the first sleeve 1 and the second sleeve 2 through the first through hole 52 via the first oil passage described above.
It should be noted that, the accommodating space may be communicated with the air inlet device to form an air inlet channel a, and the air entering the accommodating space through the air inlet channel a may be mixed with the fuel entering the accommodating space through the first oil path.
The size and the arrangement position of the first through holes 52 are not particularly limited, and may be adaptively set according to actual needs, for example, the diameter of the first through holes 52 ranges from 0.3 to 1mm. In order to adaptively change the injection angle, the first through hole 52 may be provided in a slope shape with an injection angle between 30 and 150 degrees.
The embodiment of the invention provides a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure, wherein an air inlet channel A is formed by sleeving a first sleeve 1 and a second sleeve 2, meanwhile, a first swirl vane 3 and an annular piece 5 are arranged between the first sleeve 1 and the second sleeve 2, a first annular cavity 4 is formed between the first swirl vane 3 and the first sleeve 1, a second annular cavity 51 is arranged on the annular piece 5, a third annular cavity 33 is arranged on the first swirl vane 3, the first annular cavity 4, the second annular cavity 51 and the third annular cavity 33 are sequentially communicated, a first oil injection channel is formed together with a first through hole 52 positioned on the annular piece 5, and fuel is injected into air incoming flow injected from the air inlet channel A through the first oil injection channel so as to realize uniform mixing of oil and gas; simultaneously, the air inlet channel A and the first oil injection channel are mutually independent, and the corresponding air inflow, air inlet rate, oil injection quantity and oil injection rate can be independently controlled. Therefore, the main combustion stage head of the central grading combustion chamber adopting the porous multi-angle oil injection ring structure can effectively ensure the uniformity of oil-gas mixing, and has the advantages of simple structure, convenient assembly, easy processing and low processing cost.
In an alternative embodiment, the first swirl vane 3 comprises a first connection portion 31 and a second connection portion 32.
The inner wall surface of the first connecting portion 31 is sleeved on the outer wall surface of the first sleeve 1, the outer wall surface of the first sleeve 1 is provided with a circumferentially-through concave portion, and the concave portion and the inner wall surface of the first connecting portion 31 enclose to form a first annular cavity 4.
The second connecting portion 32 is connected to the outer wall surface of the first connecting portion 31, and the annular member 5 is formed with a first oil injection space B by being constructed between the second connecting portion 32 and the first connecting portion 31, and the position of the first through hole 52 is matched with the first oil injection space B.
Specifically, as shown in fig. 2 and 3, the outer wall surface of the first sleeve 1 is provided with a circumferentially penetrating recess portion adapted to enclose a first annular cavity 4, i.e., an oil path annular cavity, with the inner wall surface of the first connection portion 31.
In one embodiment, the inner wall surface of the first connection portion 31 abuts against the outer wall surface of the first sleeve 1, and the outer wall surface of the first connection portion 31 is higher than the outer wall surface of the first sleeve 1.
In another embodiment, as shown in fig. 3, a stepped structure is disposed between the recess portion and the outer wall surface of the outermost layer of the first sleeve 1, and the height of the stepped structure is exactly the same as the thickness of the first connection portion 31, and the first connection portion 31 abuts against the stepped structure so that the outer wall surface of the first connection portion 31 is flush with the outer wall surface of the first sleeve 1.
In order to ensure the connection fixing degree and the sealing effect of the cavity, the connection parts of the first connection part 6131 and the first sleeve 1 can be connected in a welding mode to form a sealing cavity so as to prevent fuel leakage.
The second connecting portion 32 may be perpendicular to the first connecting portion 31, or may be inclined, and serves as a swirl vane for guiding the gas entering from the air inlet channel a, so that the gas flow meets the number of swirls required by design, and the gas is dispersed more uniformly, so that the fuel and the gas are mixed more uniformly.
In addition, the second connecting portion 32 is disposed between the first connecting portion 31 and the annular member 5, and has the function of supporting and blocking the first injection space B, and the first through hole 52 is disposed toward the first injection space B, so that the fuel can enter the first injection space B and be mixed with the swirling gas.
In an alternative embodiment, the second connection portions 32 are plural, and the plural second connection portions 32 are sequentially arranged along the circumferential direction of the first connection portion 31.
Specifically, as shown in fig. 4, in order to further improve the uniform flow effect of the gas, the number of the second connection portions 32, that is, the blade bodies, may be multiple, and the multiple second connection portions 32 may be sequentially arranged along the circumferential direction of the first connection portion 31, may be sequentially arranged in parallel, or may be arranged by changing angles of the multiple second connection portions 32 according to actual needs, and the specific arrangement manner is not limited, so that the swirling effect may be achieved.
In an alternative embodiment, the outer wall surface of the ring member 5 is provided with a second through hole 53, and the first annular cavity 4, the second annular cavity 51 and the third annular cavity 33 can form a second fuel injection channel with the second through hole 53.
Specifically, in order to further enhance the injection efficiency of the fuel, the second annular member 5 is further provided with a second through hole 53, and the arrangement mode of the second through hole 53 may refer to the arrangement mode of the first through hole 52, which is different only in that the first through hole 52 is disposed on the inner wall surface of the annular member 5, and the second through hole 53 is disposed on the outer wall surface of the annular member 5, so that a person skilled in the art can adaptively set the second through hole 53 according to the first through hole 52, which is not described herein.
The second through hole 53 may be disposed at a position corresponding to the first through hole 52, or may be disposed at a staggered position, and the specific position thereof may be set according to actual requirements.
The first annular chamber 4, the second annular chamber 51 and the third annular chamber 33 form a second fuel injection passage together with the second through hole 53 in the annular member 5.
In an alternative embodiment, the main combustion stage head arrangement further comprises second swirl vanes 6; the second swirl vanes 6 are provided between the second sleeve 2 and the annular member 5.
Specifically, as shown in fig. 1, a second swirl vane 6 is further disposed between the inner wall surface of the second sleeve 2 and the outer wall surface of the annular member 5, and the space between the second sleeve 2 and the annular member 5 is isolated by the second swirl vane 6, so as to provide an oil injection space for the second oil injection passage.
In an alternative embodiment, the second swirl vane 6 comprises a third connection portion 61 and a fourth connection portion 62.
The outer wall surface of the third connecting portion 61 is attached to the inner wall surface of the second sleeve 2, the fourth connecting portion 62 is connected to the inner wall surface of the third connecting portion 61, the second oil injection space C is formed between the annular member 5 and the fourth connecting portion 62 and the third connecting portion 61, and the position of the second through hole 53 is matched with the second oil injection space C.
Specifically, as shown in fig. 3 and 5, the second swirl vanes 6 are similar to the first swirl vanes 3 in structure, and each have a circular T-shaped structure formed by two connecting portions.
The second swirl vanes 6 and the first swirl vanes 3 are symmetrically arranged about the ring member 5, that is, the outer wall surface of the third connecting portion 61 is attached to the inner wall surface of the second sleeve 2, and the fourth connecting portion is disposed between the inner wall surface of the third connecting portion 61 and the outer wall surface of the ring member 5. The fourth connecting portion not only has a supporting function, but also can separate the second oil injection space C between the third connecting portion 61 and the annular member 5, and the second through hole 53 is disposed towards the second oil injection space C, so that the fuel can enter the second oil injection space C to be mixed with the swirling gas.
The fourth connecting portion 62 may be disposed perpendicular to the third connecting portion 61, or may be disposed obliquely, and functions as the second connecting portion 32, and also functions as a swirl vane, to guide the gas introduced from the air inlet passage a, so that the gas is dispersed more uniformly, and thus the fuel and the gas are mixed more uniformly.
Further, in order to further improve the uniform flow effect of the gas, the fourth connection portions 62 are plural, and the plural fourth connection portions 62 are sequentially arranged along the circumferential direction of the third connection portion 61.
The fourth connecting portions 62 may be sequentially arranged in parallel, or the fourth connecting portions 62 may be arranged at different angles according to actual needs, and the specific arrangement mode is not limited, so that the rotational flow effect may be achieved.
In an alternative embodiment, the first through hole 52 and the second through hole 53 are plural; the plurality of first through holes 52 are provided in the circumferential direction of the ring member 5 on the inner side wall of the ring member 5, and the plurality of second through holes 53 are provided in the circumferential direction of the ring member 5 on the outer side wall of the ring member 5.
Specifically, in order to further secure the injection effect of the fuel to adaptively provide the mixing uniformity of the oil and gas, the first through holes 52 located at the inner side wall of the ring member 5 may be provided in plurality, and the second through holes 53 located at the outer side wall of the ring member 5 may be provided in plurality.
The number of the first through holes 52 may or may not correspond to the number of the second through holes 53, and the number of the first through holes 52 and the second through holes 53 may be in the range of 10 to 40.
In the embodiment of the present invention, in order to ensure the uniformity of the oil-gas mixture, one or more first through holes 52 may be correspondingly disposed in the first oil injection spaces B separated by the second connecting portions 32; one or more second through holes 53 can be correspondingly arranged in the second oil injection spaces C separated by the fourth connecting parts, and the number of the through holes can be adaptively changed, so that the adjustable shape of oil-gas mixture is ensured.
In an alternative embodiment, the main combustion stage head arrangement further comprises an oil circuit nipple 7, the oil outlet of the oil circuit nipple 7 being in through connection with the first annular cavity 4.
Specifically, fuel enters the first annular cavity 4 through the oil way connector 7, enters the third annular cavity 33 through the second annular cavity 51, then the first through hole 52 and the second through hole 53 on the first swirl vane 3 are arranged in the first oil injection space B and the second oil injection space C in a spraying mode, meanwhile, under the action of the air inlet channel A, the swirl vane can further promote the fuel to be sprayed into the rotating incoming flow, the oil-gas mixture formed by mixing with gas enters the combustion chamber after premixing to a certain extent, and swirl premixed flames are formed to participate in the combustion process.
It should be noted that: the positions, the number and the injection angles of the first through holes 52 and the second through holes 53 serving as oil injection ports can be changed according to actual needs; the deflection angle of the first swirl vanes 3 and the deflection angle of the second swirl vanes 6 can be adjusted according to actual needs, so that the strengthening effect of the oil-gas premixing degree is changed, different oil-gas mixing effects are realized, the main combustion stage flame structure is adjusted, and the aim of low-emission combustion is fulfilled.
In an alternative embodiment, the main combustion stage head device further comprises a flow guiding element 8, wherein the flow guiding element 8 is in a ring shape, and the flow guiding element 8 is connected to the side of the ring-shaped element 5 facing away from the oil way joint 7.
Specifically, as shown in fig. 2 and fig. 3, in order to prevent flow separation between two airflows in the first oil injection space B and the second oil injection space C, a flow guiding member 8 is disposed at the right end of the annular member 5, and the flow guiding member 8 may be in a conical structure, or may be in a trapezoid structure, or may be in another structure with a width gradually decreasing from the right end of the annular member 5 to the outside, and the structure is not specifically limited, so that flow guiding can be performed, and a circumferential pneumatic uniform flow effect can be achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A central staged combustor primary combustion stage head employing a multi-hole multi-angle oil spray ring structure, comprising: the first sleeve, the second sleeve, the first swirl vane and the annular piece;
the second sleeve is sleeved on the outer side of the first sleeve, an air inlet channel is formed between the first sleeve and the second sleeve, and the first swirl vanes and the annular piece are sequentially arranged in the air inlet channel along the radial direction of the first sleeve;
a first annular cavity is formed between the first swirl vane and the first sleeve, the annular piece is provided with a second annular cavity, and the first annular cavity and the second annular cavity are both arranged along the axial extension direction of the first sleeve; the first swirl vanes are provided with third annular cavities which are arranged along the radial extending direction of the first sleeve; the inner wall surface of the annular piece is provided with a first through hole, and the first annular cavity, the second annular cavity and the third annular cavity are sequentially communicated and arranged and can form a first oil injection channel with the first through hole.
2. The main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil jet ring structure as claimed in claim 1, wherein the first swirl vanes comprise a first connection portion and a second connection portion;
the inner wall surface of the first connecting part is sleeved on the outer wall surface of the first sleeve, the outer wall surface of the first sleeve is provided with a circumferentially through concave part, and the concave part and the inner wall surface of the first connecting part are surrounded to form the first annular cavity;
the second connecting portion is connected to the outer wall surface of the first connecting portion, a first oil injection space is formed between the annular piece and the second connecting portion, and the position of the first through hole is matched with the first oil injection space.
3. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 2, wherein the number of the second connecting parts is plural, and the plural second connecting parts are sequentially arranged along the circumferential direction of the first connecting part.
4. The main combustion stage head of the central staged combustion chamber adopting the multi-hole multi-angle oil injection ring structure as claimed in claim 1, wherein the outer wall surface of the annular member is provided with a second through hole, and the first annular cavity, the second annular cavity and the third annular cavity can form a second oil injection channel with the second through hole.
5. The central staged combustor main stage head with a multi-hole multi-angle oil injection ring structure as defined in claim 4, wherein the main stage head assembly further comprises second swirl vanes; the second swirl vanes are disposed between the second sleeve and the annular member.
6. The main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil jet ring structure as defined in claim 5, wherein the second swirl vanes include a third connection portion and a fourth connection portion;
the outer wall surface laminating of third connecting portion is located the telescopic inner wall surface of second, fourth connecting portion connect in the inner wall surface of third connecting portion, the ring piece through with fourth connecting portion with build between the third connecting portion and be formed with the second oil spout space, the position of second through-hole with second oil spout space assorted.
7. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 6, wherein the number of the fourth connecting parts is plural, and the plural fourth connecting parts are sequentially arranged along the circumferential direction of the third connecting part.
8. The main combustion stage head of a central staged combustion chamber employing a multi-hole multi-angle oil injection ring structure as claimed in claim 6, wherein said first through hole and said second through hole are plural; the plurality of first through holes are arranged on the inner side wall of the annular piece along the circumferential direction of the annular piece, and the plurality of second through holes are arranged on the outer side wall of the annular piece along the circumferential direction of the annular piece.
9. The main combustion stage head of a central staged combustion chamber employing a multi-hole multi-angle oil injection ring structure as claimed in claim 1, wherein the main combustion stage head device further comprises an oil way nozzle, and an oil outlet of the oil way nozzle is in through connection with the first annular cavity.
10. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 9, wherein the main combustion stage head device further comprises a flow guiding piece, the flow guiding piece is in a ring shape, and the flow guiding piece is connected to one side of the ring piece, which is away from the oil way joint.
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