CN115234943A - Center grading and axial grading coupling type combustion chamber - Google Patents
Center grading and axial grading coupling type combustion chamber Download PDFInfo
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- CN115234943A CN115234943A CN202210772977.XA CN202210772977A CN115234943A CN 115234943 A CN115234943 A CN 115234943A CN 202210772977 A CN202210772977 A CN 202210772977A CN 115234943 A CN115234943 A CN 115234943A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 191
- 230000008878 coupling Effects 0.000 title abstract description 8
- 238000010168 coupling process Methods 0.000 title abstract description 7
- 238000005859 coupling reaction Methods 0.000 title abstract description 7
- 238000001816 cooling Methods 0.000 claims description 11
- 238000010926 purge Methods 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 31
- 239000000446 fuel Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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 & Propulsion (AREA)
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Abstract
The invention relates to the technical field of combustion chambers, in particular to a center grading and axial grading coupling type combustion chamber. The central classification and axial classification coupling type combustion chamber comprises a flame tube, a pre-combustion stage device, a central main combustion stage device and an axial main combustion stage device, wherein the pre-combustion stage device and the central main combustion stage device are respectively arranged at the front end of the flame tube, and the central main combustion stage device is sleeved outside the pre-combustion stage device; the axial main combustion stage device is arranged on the periphery of the flame tube, and is communicated with the flame tube. The central grading and axial grading coupled combustion chamber provided by the invention can enable a gas turbine to meet the requirements of high efficiency and low emission combustion within a wide working condition oil-gas ratio range.
Description
Technical Field
The invention relates to the technical field of combustion chambers, in particular to a center grading and axial grading coupling type combustion chamber.
Background
Gas turbines are one of the important equipments in the energy and power field of today, wherein a combustion chamber is used as a core component and a power source of the gas turbine, and is also a main pollution emission source of the gas turbine, and the pollution emission requires strict limits on emissions of nitrogen oxides (NOx), carbon monoxide (CO), unburned Hydrocarbons (UHC), smoke (Smoke) and the like generated by combustion of the gas turbine.
In order to meet the requirement of low emission of a combustion chamber, the prior art adopts a central low emission combustion chamber with a central pre-combustion stage and an outer ring main combustion stage. At present, the combustor of the low-emission gas turbine is required to realize high-efficiency low-emission combustion in a large working condition range. However, in the whole operating condition range of the gas turbine, the total oil-gas ratio has great change, when the gas turbine is in a small operating condition, the total oil-gas ratio is too low, if a center grading low-emission scheme in the prior art is adopted, the main combustion stage equivalence ratio is too low, and the combustion efficiency and the pollutant emission level cannot reach the design index. That is, the central low-emission combustion chamber of the central pre-combustion stage and the outer ring main combustion stage adopted in the prior art is difficult to meet the high-efficiency low-emission combustion requirement of the gas turbine in a wide working condition range, especially in a low working condition.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the invention provides a central grading and axial grading coupled combustion chamber, which can enable a gas turbine to meet the requirements of high efficiency and low emission combustion within a wide working condition oil-gas ratio range.
The invention provides a central classification and axial classification coupled combustion chamber, which comprises a flame tube, a pre-combustion stage device, a central main combustion stage device and an axial main combustion stage device, wherein the pre-combustion stage device and the central main combustion stage device are respectively arranged at the front end of the flame tube, and the central main combustion stage device is sleeved outside the pre-combustion stage device; the axial main combustion stage device is arranged on the periphery of the flame tube, and is communicated with the flame tube.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, a plurality of axial main combustion stage devices are arranged and are uniformly distributed on the circumferential periphery of the flame tube in an annular shape.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, the pre-burning stage device comprises a pre-burning stage nozzle and a pre-burning stage outer ring which are sequentially arranged from inside to outside, and a first swirl vane is arranged between the pre-burning stage nozzle and the pre-burning stage outer ring.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, the pipe wall of the pre-combustion stage outer ring is provided with the cooling air hole, one end of the cooling air hole is communicated with the outside, and the other end of the cooling air hole is communicated with the flame tube.
According to the center-staged and axial-staged coupled combustor provided by the invention, the center main combustion stage device comprises a main combustion stage inner ring and a main combustion stage outer ring which are sequentially arranged from inside to outside, a main combustion stage premixing channel is formed between the main combustion stage inner ring and the main combustion stage outer ring, and second swirl vanes are arranged in the main combustion stage premixing channel.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, an oil collecting cavity is arranged in the pipe wall of the inner ring of the main combustion stage, one end of the oil collecting cavity is communicated with the outside, and the other end of the oil collecting cavity is communicated with the premixing channel of the main combustion stage through an oil through hole.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, a main combustion stage baffle is arranged at the joint of the main combustion stage outer ring and the flame tube.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, the position, close to the main combustion stage baffle, on the main combustion stage outer ring is provided with the purge air hole, one end of the purge air hole is communicated with the outside, and the other end of the purge air hole is communicated with the main combustion stage premixing channel.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, the axial main combustion stage device comprises an axial nozzle and a premixed gas pipeline which are sequentially arranged from inside to outside, and a static mixer is arranged in the premixed gas pipeline.
According to the center-staged and axial-staged coupled combustion chamber provided by the invention, the premixed gas pipeline comprises a straight pipe section and a bent pipe section, the axial direction of the straight pipe section is parallel to the axial direction of the flame tube, one end of the bent pipe section is communicated with the straight pipe section, and the other end of the bent pipe section is communicated with the flame tube; the axial nozzle is arranged in the straight pipe section at a position far away from the bent pipe section.
One or more technical solutions in the embodiments of the present invention at least have one of the following technical effects:
the invention provides a central classification and axial classification coupling type combustion chamber which comprises a flame tube, a pre-combustion stage device, a central main combustion stage device and an axial main combustion stage device, wherein the pre-combustion stage device and the central main combustion stage device are respectively arranged at the front end of the flame tube, and the central main combustion stage device is sleeved on the outer side of the pre-combustion stage device; the axial main combustion stage device is arranged on the periphery of the flame tube in the circumferential direction and communicated with the flame tube, so that a grading strategy that center grading and axial grading are coupled is realized, and the devices at all stages can be sequentially started along with the increase of working conditions. Under the small working conditions of starting ignition and the like, only the precombustion stage device is started to work, and the precombustion stage device adopts a diffusion combustion mode; the central main combustion stage device is started to work along with the increase of the working condition, and the central main combustion stage device adopts a premixed combustion mode, so that the emission level of a combustion chamber is reduced; and when the working condition continues to increase, the axial main combustion stage device is started to work, and the axial main combustion stage device adopts a premixed combustion mode to further reduce the emission level of the combustion chamber. Therefore, the central grading and axial grading coupled combustion chamber provided by the invention can maintain the combustion area at a proper equivalence ratio under each working condition, thereby balancing pollutant emission and combustion efficiency, realizing better combustion performance, and further enabling a gas turbine to meet the combustion requirements of high efficiency and low emission within a wide working condition oil-gas ratio range.
Drawings
FIG. 1 is a schematic structural view of a center staged and axially staged coupled combustor provided in accordance with an embodiment of the present invention;
FIG. 2 is an isometric view of a center staged and axially staged coupled combustor provided by an embodiment of the present invention;
3-8 are schematic diagrams of the operation of the central staged and axial staged coupled combustors provided by the embodiments of the invention;
FIG. 9 is a schematic view of the flame conditions after the axial main stage means is turned on for the center staged and axial staged coupled combustor as provided by an embodiment of the present invention;
FIG. 10 is a schematic view of the airflow angle of the axial main stage assembly in the center staged and axial staged coupled combustor provided by an embodiment of the present invention.
Reference numerals:
1: a pre-combustion stage nozzle; 2: a first swirl vane; 3: a precombustion stage outer ring; 4: a primary combustion stage inner ring; 5: an oil collecting cavity; 6: a second swirl vane; 9: a main combustion stage outer ring; 10: blowing the air holes; 11: a main combustion stage baffle; 12: a main combustion stage premix passage; 13: cooling the air holes; 14: a flame tube; 15: a pre-combustion stage device; 16: a central primary combustion stage arrangement; 17: an axial main combustion stage device; 21: an axial nozzle; 22: a premixed gas conduit; 221: a straight pipe section; 222: bending the pipe section; 23: a static mixer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Specific embodiments of the center staged and axially staged coupled combustors of the invention are described below in conjunction with fig. 1-10.
The central-staged and axial-staged coupled combustor of the embodiment of the present invention includes a flame tube 14, a pre-burning stage device 15, a central main burning stage device 16 and an axial main burning stage device 17, wherein the pre-burning stage device 15 and the central main burning stage device 16 are respectively disposed at the front end of the flame tube 14, and the central main burning stage device 16 is sleeved outside the pre-burning stage device 15. The axial main combustion stage device 17 is arranged on the circumferential periphery of the flame tube 14, and the axial main combustion stage device 17 is communicated with the flame tube 14. The precombustion stage device 15 adopts a diffusion combustion mode, and the central main combustion stage device 16 and the axial main combustion stage device 17 both adopt a premix combustion mode.
In the central classification and axial classification coupling type combustion chamber of the embodiment of the invention, under the small working conditions of starting ignition and the like, only the precombustion stage device 15 is started to work, and the precombustion stage device 15 adopts diffusion combustion to stabilize flame; as the working condition is increased, the central main combustion stage device 16 is started to work, and the central main combustion stage device 16 adopts premixed combustion, so that the emission level of a combustion chamber is reduced; when the working condition continues to increase, the axial main combustion stage device 17 is started to work, and the axial main combustion stage device 17 adopts premixed combustion, so that the emission level of the combustion chamber is further reduced. FIG. 9 is a schematic view of the flame conditions in the combustor after the axial main stage device 17 is turned on.
Therefore, the center grading and axial grading coupled combustion chamber provided by the embodiment of the invention adopts a grading strategy of coupling center grading and axial grading, can sequentially start devices at each grade along with the increase of working conditions, and can maintain a proper equivalence ratio of a combustion area under each working condition, thereby balancing pollution emission and combustion efficiency and realizing better combustion performance. Furthermore, the combustion chamber is applied to the gas turbine, so that the gas turbine can meet the requirements of high efficiency and low emission combustion within a wide working condition oil-gas ratio range.
Specifically, one or more axial main combustion stage devices 17 can be arranged according to actual use requirements.
When a plurality of axial main combustion stage devices 17 are provided, the plurality of axial main combustion stage devices 17 are uniformly distributed on the circumferential periphery of the flame tube 14 in an annular shape. Therefore, when the axial main combustion device works, each axial main combustion device 17 can be started to work one by one according to the increase of actual working conditions, so that the combustion area can be maintained at a proper equivalence ratio under each working condition, the pollutant discharge and the combustion efficiency are balanced, and the better combustion performance is realized.
The operation of the center staged and axially staged coupled combustor of this embodiment will now be described in detail, with four axial main stage assemblies 17 being provided as examples, as shown in fig. 3-8, wherein the filling portion of the drawings shows the assembly in an open operating condition.
As shown in fig. 3, in a small condition such as ignition start, only the preliminary stage device 15 is turned on to operate.
As shown in fig. 4, as the operating condition increases, the central main stage device 16 is turned on to operate, that is, the precombustion stage device 15 and the central main stage device 16 operate together.
As shown in fig. 5, as the operating conditions continue to increase, an axial main stage device 17 is activated, i.e. the precombustion stage device 15, the central main stage device 16 and an axial main stage device 17 are activated together.
As shown in fig. 6, as the operating condition continues to increase, one axial main stage device 17 is turned on to operate, that is, the precombustion stage device 15, the central main stage device 16 and the two axial main stage devices 17 operate together.
As shown in fig. 7, as the operating condition continues to increase, one more axial main stage device 17 is turned on to operate, that is, the precombustion stage device 15, the central main stage device 16 and the three axial main stage devices 17 operate together.
As shown in fig. 8, as the operating condition continues to increase, one axial main stage device 17 is turned on to operate, that is, the precombustion stage device 15, the central main stage device 16 and the four axial main stage devices 17 operate together.
Therefore, the central classification and axial classification coupled combustion chamber provided by the embodiment of the invention can maintain a proper equivalence ratio in a combustion area under each working condition, so that pollution emission and combustion efficiency are balanced, and better combustion performance is realized.
In some embodiments of the present invention, the pre-combustion stage device 15 comprises a pre-combustion stage nozzle 1 and a pre-combustion stage outer ring 3 which are arranged in sequence from inside to outside, and a first swirl vane 2 is arranged between the pre-combustion stage nozzle 1 and the pre-combustion stage outer ring 3. When the pre-combustion stage device 15 works, the pre-combustion stage fuel is sprayed from the pre-combustion stage nozzle 1 and is mixed with the pre-combustion stage air entering through the first swirl vanes 2 for diffusion combustion.
Wherein, according to the actual use requirement, the first swirl vane 2 can adopt a single-stage swirler vane or a multi-stage swirler vane.
Specifically, cooling air holes 13 are provided in the pipe wall of the precombustion stage outer ring 3, one end of each cooling air hole 13 communicates with the outside, and the other end of each cooling air hole 13 communicates with the liner 14. That is, by providing the cooling holes 13, the temperature of the precombustion stage outer ring 3 can be reduced.
In some embodiments of the present invention, the central main combustion stage device 16 includes a main combustion stage inner ring 4 and a main combustion stage outer ring 9, which are sequentially arranged from inside to outside, a main combustion stage premixing passage 12 is formed between the main combustion stage inner ring 4 and the main combustion stage outer ring 9, and second swirl vanes 6 are disposed in the main combustion stage premixing passage 12.
Wherein, according to the actual use requirement, the second swirl vanes 6 can adopt single-stage swirler vanes or multi-stage swirler vanes.
Wherein, an oil collecting cavity 5 is arranged in the pipe wall of the inner ring 4 of the main combustion stage, one end of the oil collecting cavity 5 is communicated with the outside, and the other end of the oil collecting cavity 5 is communicated with the premixing channel 12 of the main combustion stage through an oil through hole.
When the central main combustion stage device 16 works, main combustion stage fuel enters the main combustion stage premixing channel 12 through the oil collecting cavity 5 and the oil through hole, and is fully mixed with main combustion stage inflow air entering through the second swirl vanes 6 in the main combustion stage premixing channel 12 to form an oil-gas mixture, and then the oil-gas mixture enters the flame tube 14 for premixed combustion.
Specifically, a main combustion stage baffle 11 is arranged at the joint of the main combustion stage outer ring 9 and the flame tube 14. A plurality of purge holes 10 may also be provided at a position on the main combustion stage outer ring 9 near the main combustion stage baffle 11, and the purge holes 10 are uniformly distributed on the main combustion stage outer ring 9 in an annular shape. One end of each purge hole 10 is communicated with the outside, and the other end of each purge hole 10 is communicated with the main combustion stage premixing passage 12. That is, by providing the purge holes 10, the end of the main combustion stage premix passage 12 can be purged, thereby preventing the main combustion stage premix passage 12 from being backfired.
In some embodiments of the invention, the axial primary stage 17 comprises, arranged in sequence from inside to outside, an axial nozzle 21 and a premix gas duct 22, in which duct 22 a static mixer 23 is arranged. When the axial main combustion stage device 17 works, axial main combustion stage fuel is injected into the premixed gas pipeline 22 through the axial nozzle 21, is stirred and mixed with air in the premixed gas pipeline 22 through the static mixer 23 to obtain a uniform oil-gas mixture, and then enters the flame tube 14 for premixed combustion. That is, by providing the static mixer 23 in the premix gas conduit 22, the air and the axial main stage fuel within the premix gas conduit 22 can be thoroughly mixed before entering the combustor basket 14.
The premixed gas pipeline 22 includes a straight pipe section 221 and an elbow section 222, an axial direction of the straight pipe section 221 is parallel to an axial direction of the combustor basket 14, one end of the elbow section 222 is communicated with the straight pipe section 221, and the other end of the elbow section 222 is communicated with the combustor basket 14. The axial nozzle 21 is arranged in the straight pipe section 221 at a position far away from the bend pipe section 222, and the axial main fuel stage fuel injected through the axial nozzle 21 can be uniformly mixed with air entering the premixed gas pipeline 22 through the static mixer 23 and then enters the flame tube 14.
As shown in FIG. 10, the air inlet direction of the axial main combustion stage device 17 into the combustor basket 14 can be along the surface normal of the combustor basket 14, or can be tangential to the surface normal of the combustor basket 14 at an angle of 0-90 degrees, wherein the arrow in FIG. 10 indicates the air inlet direction.
Specifically, the axial position coefficient of the axial main stage device 17 communicating with the combustor basket 14 is defined as: the axial position of the communication part is divided by the total length of the flame tube 14, and the coefficient of the axial position of the communication between the axial main combustion stage device 17 and the flame tube 14 is 0.3-0.9.
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", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, 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 the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; 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 "under," "beneath," and "under" a second feature may be directly under or obliquely under the second 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.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and 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. The utility model provides a hierarchical and hierarchical manifold type combustion chamber of axial of center which characterized in that: the pre-combustion device and the central main combustion device are respectively arranged at the front end of the flame tube, and the central main combustion device is sleeved outside the pre-combustion device; the axial main combustion stage device is arranged on the periphery of the flame tube, and is communicated with the flame tube.
2. The center-staged and axially staged coupled combustor as claimed in claim 1, wherein: the axial main combustion stage devices are arranged in a plurality of numbers and are uniformly distributed on the circumferential periphery of the flame tube in an annular mode.
3. The center-staged and axially staged coupled combustor as claimed in claim 1, wherein: the pre-burning stage device comprises a pre-burning stage nozzle and a pre-burning stage outer ring which are sequentially arranged from inside to outside, and a first swirl vane is arranged between the pre-burning stage nozzle and the pre-burning stage outer ring.
4. The center-staged and axially staged coupled combustor of claim 3, wherein: and cooling air holes are formed in the pipe wall of the precombustion stage outer ring, one end of each cooling air hole is communicated with the outside, and the other end of each cooling air hole is communicated with the flame tube.
5. The center-staged and axially staged coupled combustor as claimed in claim 1, wherein: the central main combustion stage device comprises a main combustion stage inner ring and a main combustion stage outer ring which are sequentially arranged from inside to outside, a main combustion stage premixing channel is formed between the main combustion stage inner ring and the main combustion stage outer ring, and second swirl blades are arranged in the main combustion stage premixing channel.
6. The center-staged and axially staged coupled combustor of claim 5, wherein: an oil collecting cavity is arranged in the pipe wall of the inner ring of the main combustion stage, one end of the oil collecting cavity is communicated with the outside, and the other end of the oil collecting cavity is communicated with the premixing channel of the main combustion stage through an oil through hole.
7. The center-staged and axially staged coupled combustor of claim 5, wherein: and a main combustion stage baffle is arranged at the joint of the main combustion stage outer ring and the flame tube.
8. The center-staged and axially staged coupled combustor as claimed in claim 7, wherein: and a purging air hole is formed in the position, close to the main combustion stage baffle, of the main combustion stage outer ring, one end of the purging air hole is communicated with the outside, and the other end of the purging air hole is communicated with the main combustion stage premixing channel.
9. The center-staged and axially staged coupled combustor as claimed in claim 1, wherein: the axial main combustion stage device comprises an axial nozzle and a premixed gas pipeline which are sequentially arranged from inside to outside, and a static mixer is arranged in the premixed gas pipeline.
10. The center-staged and axially staged coupled combustor of claim 9, wherein: the premixing air pipeline comprises a straight pipe section and a bent pipe section, the axial direction of the straight pipe section is parallel to the axial direction of the flame tube, one end of the bent pipe section is communicated with the straight pipe section, and the other end of the bent pipe section is communicated with the flame tube; the axial nozzle is arranged in the straight pipe section at a position far away from the bent pipe section.
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| 梁春华: "燃气涡轮发动机干低排放燃烧室的研制及发展", 航空发动机, no. 04, pages 47 - 53 * |
| 高磊;汪军;: "燃气轮机燃烧室的现状及发展趋势", 能源研究与信息, no. 03, pages 159 - 166 * |
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Application publication date: 20221025 |