CN115200048A - Combustion chamber with two-stage blade enhanced mixing - Google Patents
Combustion chamber with two-stage blade enhanced mixing Download PDFInfo
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- CN115200048A CN115200048A CN202210616263.XA CN202210616263A CN115200048A CN 115200048 A CN115200048 A CN 115200048A CN 202210616263 A CN202210616263 A CN 202210616263A CN 115200048 A CN115200048 A CN 115200048A
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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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- Combustion Of Fluid Fuel (AREA)
Abstract
The invention provides a combustion chamber with two-stage blades for intensified mixing, which comprises a pre-combustion stage assembly, a main combustion stage assembly and a combustion chamber body, wherein the main combustion stage assembly is arranged on the outer side of the pre-combustion stage assembly in a surrounding manner, a main combustion stage passage is arranged in the main combustion stage assembly, one side of the main combustion stage assembly is provided with an air inlet communicated with the main combustion stage passage, a first-stage swirl blade and a second-stage swirl blade are arranged in the main combustion stage passage, the combustion chamber body is communicated with the main combustion stage passage of the main combustion stage assembly, the first-stage swirl blade is positioned on the front side of the second-stage swirl blade along the fuel conveying direction, the first-stage swirl blade is provided with a fuel chamber, the fuel chamber is provided with a feed hole and a spray hole, and the spray hole faces the main combustion stage passage. To improve the mixing uniformity of the fuel and the air, thereby realizing lower pollutant emission and more uniform outlet temperature of the combustion chamber.
Description
Technical Field
The invention relates to the technical field of combustion chambers, in particular to a combustion chamber with reinforced mixing of double-stage blades.
Background
The fuel mixing uniformity degree can influence the fuel combustion degree in the combustion chamber, and the low fuel mixing uniformity degree can lead to the combustion chamber problem such as tempering, production pollutant, for improving fuel mixing uniformity, the main burning stage of most combustion chambers provides the mixing by one-level radial swirler, and the fuel gets into the cavity by direct injection formula orifice efflux, accomplishes premixing of fuel and air in the cavity. However, the mixing effect of the existing combustion chamber is not good, which easily causes insufficient combustion degree and generates more pollutants during combustion.
Disclosure of Invention
The invention provides a combustion chamber with reinforced mixing of two-stage blades, which is used for solving the technical problem of poor mixing effect of the combustion chamber in the prior art and improving the mixing uniformity of fuel and air.
The invention provides a combustion chamber with reinforced mixing of double-stage blades, which comprises:
a pre-combustion stage assembly;
the main combustion stage assembly is arranged on the outer side of the pre-combustion stage assembly in a surrounding mode, a main combustion stage channel is arranged in the main combustion stage assembly, an air inlet communicated with the main combustion stage channel is formed in one side of the main combustion stage assembly, and a first-stage swirl blade and a second-stage swirl blade are arranged in the main combustion stage channel;
a combustor body in communication with the primary combustion stage passage of the primary combustion stage assembly;
the primary swirl vane is positioned on the front side of the secondary swirl vane along the conveying direction of fuel, the primary swirl vane is provided with a fuel chamber, the fuel chamber is provided with a feed hole and a spray hole, and the spray hole faces the main fuel stage channel.
According to the combustion chamber for intensifying mixing of the two-stage blades, the material spraying hole is formed in the front end or the rear end of the first-stage swirl blade.
According to the combustion chamber with the two-stage blades for intensified mixing, provided by the invention, the rear ends of the first-stage rotational flow blades and the second-stage rotational flow blades are respectively provided with saw-tooth-shaped bulges in an outward extending mode.
According to the combustion chamber with the intensified mixing of the two-stage blades, the sawtooth-shaped protrusions extend outwards in the direction perpendicular to the first-stage swirl blades or the second-stage swirl blades.
According to the invention, the main combustion stage assembly comprises: the main combustion stage outer ring is arranged on the outer side of the main combustion stage swirler in a surrounding mode, and the main combustion stage channel is arranged in the main combustion stage swirler.
According to the combustion chamber with the reinforced mixing of the two-stage blades, the main combustion stage assembly further comprises: the feeding device comprises a feeding pipeline and a material guiding cavity, wherein one end of the material guiding cavity is communicated with the feeding hole, the other end of the material guiding cavity is communicated with the feeding pipeline, and the other end of the feeding pipeline is located on the outer side of the main combustion level assembly.
According to the invention, the combustion chamber with the enhanced mixing of the two-stage blades is provided, and the precombustion stage assembly comprises: the cyclone burner comprises a central body, a pre-burning stage swirler and a stage section, wherein the pre-burning stage swirler is arranged on the outer side of the central body in a surrounding manner, the stage section is arranged on the outer side of the pre-burning stage swirler in a surrounding manner, and one side of the stage section, which is far away from the pre-burning stage swirler, is connected with the main burning stage swirler.
According to the combustion chamber with the reinforced mixing of the two-stage blades, the combustion chamber body comprises: the burner comprises a connecting section and a flame tube, wherein one end of the connecting section is connected with the main combustion stage outer ring, and the other end of the connecting section is communicated with the flame tube.
According to the combustion chamber with the intensified mixing of the double-stage blades, the connecting section inclines outwards along the direction from the outer ring of the main combustion stage to the flame tube.
According to the combustion chamber with the reinforced mixing of the two-stage blades, the connecting section and the flame tube are integrally formed.
According to the combustion chamber with the two-stage blades for strengthening mixing, provided by the embodiment of the invention, air can enter the main combustion stage channel through the air inlet, fuel is conveyed into the fuel chamber through the feed hole and then is sprayed out of the spray hole, so that the sprayed fuel can be mixed with the air in the main combustion stage channel through the first-stage swirl blades and the second-stage swirl blades, the mixing effect of the fuel is strengthened by complex vortex generated between the two stages of blades, the mixing uniformity of the fuel and the air is improved, and therefore lower pollution emission and more uniform outlet temperature of the combustion chamber are realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a dual stage blade enhanced mixing combustor provided by the present invention;
FIG. 2 is one of the schematic diagrams of the fuel injection direction in the first stage swirl vanes in the combustion chamber with enhanced mixing of the two-stage vanes provided by the present invention;
FIG. 3 is a second schematic view of the fuel injection direction in the first stage swirl vanes in the two-stage vane intensified mixing combustion chamber provided by the present invention;
FIG. 4 is a third schematic view of the fuel injection direction in the first stage swirl vanes in the two stage vane intensified mixing combustion chamber provided by the present invention;
FIG. 5 is a side view of a first stage swirl vane or a second stage swirl vane in a dual stage vane enhanced mixing combustor provided by the present invention.
Reference numerals:
1. a main combustion stage swirler; 2. a primary combustion stage outer ring; 3. a central body; 4. a pre-combustion stage swirler; 5. a stage section; 6. a feed line; 7. a material guiding cavity; 8. a first stage swirl vane; 9. a secondary swirl vane; 10. a connecting section; 11. a flame tube.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate 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 "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular 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 the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The combustion chamber with the two-stage blade intensified mixing of the invention is described below with reference to fig. 1-5, and comprises a pre-combustion stage assembly, a main combustion stage assembly and a combustion chamber body, wherein the main combustion stage assembly is arranged around the outer side of the pre-combustion stage assembly, a main combustion stage passage is arranged in the main combustion stage assembly, an air inlet communicated with the main combustion stage passage is arranged on one side of the main combustion stage assembly, a first-stage swirl blade 8 and a second-stage swirl blade 9 are arranged in the main combustion stage passage, the combustion chamber body is communicated with the main combustion stage passage of the main combustion stage assembly, the first-stage swirl blade 8 is positioned on the front side of the second-stage swirl blade 9 along the fuel conveying direction, the first-stage swirl blade 8 is provided with a fuel chamber, the fuel chamber is provided with a feed hole and a fuel injection hole, and the fuel hole faces the main combustion stage passage.
In this embodiment, the air inlet is used for enabling air to enter the main combustion stage channel, the feeding hole is used for conveying fuel into the fuel cavity, and then the fuel is sprayed out of the spraying hole, so that the sprayed fuel can be mixed with the air in the main combustion stage channel through the first-stage swirl vanes 8 and the second-stage swirl vanes 9, the mixing effect of the fuel is enhanced through complex vortex generated between the two stages of vanes, the mixing uniformity of the fuel and the air is improved, and therefore lower pollution emission and more uniform combustion chamber outlet temperature are achieved.
As shown in fig. 2 and 3, the material spraying holes can spray upwards or downwards, and the spraying direction can be slightly inclined.
In the present embodiment, the material injection hole is provided at the front end or the rear end of the first-stage swirl vane 8. When the material spraying holes are formed in the front end of the first-stage swirl vane 8, the mixing distance can be lengthened, namely, the mixing distance is lengthened by means of front edge hole opening and two-stage stirring, air and fuel mixing is enhanced by two-stage swirl stirring, a complex vortex system is manufactured, efficient mixing is provided, mixing uniformity of fuel and air is improved, and the outlet of the main combustion stage channel has the best mixing uniformity. When the material spraying holes are formed in the rear end of the first-stage swirl vane 8, air and fuel mixing can be enhanced by using two-stage swirl stirring, a complex vortex system is manufactured, efficient mixing is provided, mixing uniformity of fuel and air is improved, and the outlet of the main combustion stage channel has the best mixing uniformity. It will be understood that front and rear are referenced to the direction of fuel delivery.
The fuel may be a gaseous fuel or a liquid fuel.
In the present embodiment, as shown in fig. 4 and 5, the rear ends of the first-stage swirl vanes 8 and the second-stage swirl vanes 9 are each extended outward with a serration. Wherein, the sawtooth-shaped bulges extend outwards along the direction vertical to the first-stage swirl blades 8 or the second-stage swirl blades 9. As shown in fig. 4, the serrations may be arranged in the width direction of the rear ends of the first-stage and second- stage swirl blades 8 and 9, and as shown in fig. 5, the serrations may be arranged in the length direction of the rear ends of the first-stage and second- stage swirl blades 8 and 9.
After the saw-tooth-shaped bulges are arranged, a complex vortex system can be formed in the main combustion stage channel in the mixing process, and the turbulent flow is enhanced, so that the fuel mixing is enhanced. Of course, the first-stage swirl vanes 8 and the second-stage swirl vanes 9 can also be directly designed into a sawtooth shape, and can also play a role in enhancing fuel mixing. The bulges can be set into other shapes, and only a complex vortex system can be formed by air and fuel in the main combustion stage channel under the action of the first-stage swirl blades 8 and the second-stage swirl blades 9, so that turbulence is manufactured in an intensified manner, and the effect of fuel mixing is enhanced.
In this embodiment, the primary combustion stage assembly comprises: the main combustion stage swirler comprises a main combustion stage swirler 1 and a main combustion stage outer ring 2, wherein the main combustion stage outer ring 2 is arranged on the outer side of the main combustion stage swirler 1 in a surrounding manner, and a main combustion stage channel is arranged in the main combustion stage swirler 1.
The main combustion stage outer ring 2 is used as an outer ring closed structure of the front end or the rear end part of the combustion chamber with two-stage blade intensified mixing, a main combustion stage channel is arranged in the main combustion stage swirler 1, namely, the first-stage rotational flow blade 8 and the second-stage rotational flow blade 9 are both arranged in the main combustion stage swirler 1, the main combustion stage swirler 1 is utilized to realize the intensified mixing effect of air and fuel, and the effect of improving the mixing uniformity of the fuel and the air is achieved.
The main combustion stage assembly further comprises: the device comprises a feeding pipeline 6 and a material guide cavity 7, wherein one end of the material guide cavity 7 is communicated with a feeding hole, the other end of the material guide cavity 7 is communicated with the feeding pipeline 6, and the other end of the feeding pipeline 6 is positioned on the outer side of the main combustion level assembly.
The material guiding cavity 7 may be disposed along the length direction of the main fuel stage assembly, and more specifically, the material guiding cavity 7 is opened on the main fuel stage swirler 1, and the material guiding cavity 7 is an annular cavity, and the material guiding cavity 7 is disposed along the axial direction of the main fuel stage swirler 1.
It can be understood that the fuel is ejected from the injection hole after flowing along the feeding pipeline 6, the guide cavity 7, the feeding hole and the fuel cavity, and forms a spiral-track oil mist (taking the fuel as fuel oil for example), and the spiral-track oil mist is mixed with air in the main combustion stage channel to form an oil-gas mixture to participate in combustion. The fuel chambers inside the primary swirl vanes 8 may be helically distributed.
The pre-combustion stage assembly includes: the middle body 3, the swirler 4 that preburns and the stage section 5, the swirler 4 that preburns encircles and sets up in the outside of middle body 3, the stage section 5 encircles and sets up in the outside of the swirler 4 that preburns, one side that the swirler 4 that preburns was kept away from to the stage section 5 links to each other with main burning stage swirler 1.
It will be appreciated that the stage section 5 serves to connect the pre-stage swirler 4 to the main stage swirler 1, and that the central body 3 cooperates with the pre-stage swirler 4 to form a pre-stage assembly.
The combustor body includes: the burner comprises a connecting section 10 and a flame tube 11, wherein one end of the connecting section 10 is connected with the main combustion stage outer ring 2, and the other end of the connecting section 10 is communicated with the flame tube 11. In the direction from the outer ring 2 of the main stage to the flame tube 11, the connecting section 10 is inclined outward.
As shown in fig. 1, the connecting section 10 is of a generally outwardly flared configuration, with one side of the connecting section 10 being connected to the main stage outer ring 2 and the other side of the connecting section 10 being connected to the liner 11. The connection section 10 and the flame tube 11 may be integrally formed, and of course, the connection section 10 and the flame tube 11 may be connected by welding or bolt connection, which is not limited in this embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A dual stage blade enhanced mixing combustor, comprising:
a pre-combustion stage assembly;
the main combustion stage component is arranged on the main combustion stage component,
the primary combustion stage assembly is arranged on the outer side of the pre-combustion stage assembly in a surrounding mode, a primary combustion stage channel is arranged in the primary combustion stage assembly, an air inlet communicated with the primary combustion stage channel is formed in one side of the primary combustion stage assembly, and a primary swirl blade (8) and a secondary swirl blade (9) are arranged in the primary combustion stage channel;
a combustor body in communication with the primary combustion stage channel of the primary combustion stage assembly;
the primary swirl vanes (8) are positioned on the front sides of the secondary swirl vanes (9) along the conveying direction of fuel, the primary swirl vanes (8) are provided with fuel chambers, the fuel chambers are provided with feed holes and injection holes, and the injection holes face the main fuel stage channel.
2. The dual stage blade intensified mixing combustor as claimed in claim 1, wherein the injection holes are located at the front or rear end of the first stage swirl blades (8).
3. The dual stage blade intensified mixing combustor as claimed in claim 1, wherein the rear ends of the first stage swirl blades (8) and the second stage swirl blades (9) are extended with saw tooth shaped protrusions.
4. The dual stage blade enhanced mixing combustor as claimed in claim 3 wherein the serrations extend outwardly in a direction perpendicular to the first stage swirl blades (8) or the second stage swirl blades (9).
5. The dual stage blade enhanced mixing combustor as claimed in any one of claims 1 to 4, wherein the main combustion stage assembly comprises: the main combustion stage swirler comprises a main combustion stage swirler (1) and a main combustion stage outer ring (2), wherein the main combustion stage outer ring (2) is arranged on the outer side of the main combustion stage swirler (1) in a surrounding mode, and a main combustion stage channel is arranged in the main combustion stage swirler (1).
6. The dual stage blade enhanced mixing combustor as claimed in claim 5, wherein the main combustion stage assembly further comprises: the fuel feeding device comprises a feeding pipeline (6) and a material guiding cavity (7), wherein one end of the material guiding cavity (7) is communicated with the feeding hole, the other end of the material guiding cavity (7) is communicated with the feeding pipeline (6), and the other end of the feeding pipeline (6) is located on the outer side of the main fuel assembly.
7. The dual stage blade enhanced mixing combustor of claim 5, wherein the pre-stage assembly comprises: the cyclone burner comprises a central body (3), a pre-burning stage cyclone (4) and a stage section (5), wherein the pre-burning stage cyclone (4) is arranged on the outer side of the central body (3) in a surrounding mode, the stage section (5) is arranged on the outer side of the pre-burning stage cyclone (4) in a surrounding mode, and one side, far away from the pre-burning stage cyclone (4), of the stage section (5) is connected with a main burning stage cyclone (1).
8. The dual stage blade enhanced mixing combustor of claim 5, wherein the combustor body comprises: the burner comprises a connecting section (10) and a flame tube (11), wherein one end of the connecting section (10) is connected with the main combustion stage outer ring (2), and the other end of the connecting section (10) is communicated with the flame tube (11).
9. The dual stage blade intensified mixing combustor as claimed in claim 8, wherein the connecting section (10) is inclined outwardly in the direction of the main combustion stage outer ring (2) to the liner (11).
10. The dual stage blade enhanced mixing combustor as claimed in claim 8 wherein the connecting section (10) is integrally formed with the liner (11).
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| CN202210616263.XA CN115200048B (en) | 2022-05-31 | 2022-05-31 | Two-stage blade intensified mixing combustion chamber |
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| CN202210616263.XA CN115200048B (en) | 2022-05-31 | 2022-05-31 | Two-stage blade intensified mixing combustion chamber |
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