CN115183274B - Connotation ignition afterburner - Google Patents
Connotation ignition afterburner Download PDFInfo
- Publication number
- CN115183274B CN115183274B CN202210864997.XA CN202210864997A CN115183274B CN 115183274 B CN115183274 B CN 115183274B CN 202210864997 A CN202210864997 A CN 202210864997A CN 115183274 B CN115183274 B CN 115183274B
- Authority
- CN
- China
- Prior art keywords
- afterburner
- ignition
- wall
- inner cone
- converging ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/26—Starting; Ignition
- F02C7/264—Ignition
- F02C7/266—Electric
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
The application belongs to aeroengine afterburner design technical field, concretely relates to connotation ignition afterburner includes: an afterburner outer wall; the converging ring is arranged in the outer wall of the afterburner; the inner cone is arranged in the converging ring and is provided with an annular notch; the annular notch is positioned at the outlet part of the converging ring; the rectification support plates are supported between the converging rings and the inner cone along the circumferential direction; the fuel spray bars penetrate through the outer wall of the afterburner, the fuel spray ends extend into the space between the converging ring and the inner cone, and the top ends of the fuel spray bars are aligned with the annular gaps; the ignition nozzle penetrates through the outer wall of the afterburner, the ignition end stretches into the space between the converging ring and the inner cone, and the top end is aligned with the annular gap.
Description
Technical Field
The application belongs to the technical field of aircraft engine afterburner design, and particularly relates to an connotation ignition afterburner.
Background
With the development of an aeroengine, turbine power extraction is increased, so that the angle of an connotation airflow at an inlet of an afterburner is greatly increased, the maximum angle can reach 30 degrees, the increase of the angle of the connotation airflow at the inlet of the afterburner can lead to the deviation of fuel distribution entering the afterburner from a design state, the ignition failure of the afterburner is easy to cause, the air flow is split in the afterburner, the flow loss of the air flow is increased, combustion oscillation in the afterburner is caused, the safety of structural hardware is endangered, the generated afterburner capability is limited, and the stealth performance of the aeroengine can be influenced.
The present application has been made in view of the existence of the above-mentioned technical drawbacks.
It should be noted that the above disclosure of the background art is only for aiding in understanding the inventive concept and technical solution of the present invention, which is not necessarily prior art to the present application, and should not be used for evaluating the novelty and the creativity of the present application in the case where no clear evidence indicates that the above content has been disclosed at the filing date of the present application.
Disclosure of Invention
It is an object of the present application to provide an endo-ignition afterburner that overcomes or mitigates at least one of the technical drawbacks of the known art.
The technical scheme of the application is as follows:
an endo-ignition afterburner comprising:
an afterburner outer wall;
the converging ring is arranged in the outer wall of the afterburner;
the inner cone is arranged in the converging ring and is provided with an annular notch; the annular notch is positioned at the outlet part of the converging ring;
the rectification support plates are supported between the converging rings and the inner cone along the circumferential direction;
the fuel spray bars penetrate through the outer wall of the afterburner, the fuel spray ends extend into the space between the converging ring and the inner cone, and the top ends of the fuel spray bars are aligned with the annular gaps;
the ignition nozzle penetrates through the outer wall of the afterburner, the ignition end stretches into the space between the converging ring and the inner cone, and the top end is aligned with the annular gap.
According to at least one embodiment of the present application, in the connotation ignition afterburner described above, the bottom wall of the annular gap is coaxial with the inner cone;
the included angle between the side wall and the bottom wall of the annular gap is 115-130 degrees.
According to at least one embodiment of the present application, in the connotation ignition afterburner, each rectifying support plate is internally provided with a fuel injection cavity, and the side wall is provided with a plurality of fuel injection holes; each fuel oil spraying hole is communicated with the corresponding fuel oil spraying cavity;
the oil spraying end of each oil spraying rod correspondingly stretches into one oil spraying cavity, and the top end stretches out from the bottom of the corresponding rectifying support plate.
According to at least one embodiment of the present application, in the content ignition afterburner, the distance between each fuel injection hole and the tail edge of the corresponding rectifying support plate is not more than 100mm.
According to at least one embodiment of the present application, in the connotation ignition afterburner, the ignition nozzle is disposed through a rectifying support plate, and the top end of the ignition nozzle extends out from the bottom of the corresponding rectifying support plate.
In accordance with at least one embodiment of the present application, in the context of the ignition afterburner described above, the ignition nozzle is located axially of the inner cone, behind each fuel boom.
In accordance with at least one embodiment of the present application, two of the ignition tips are distributed at 180 ° in the connotation ignition afterburner described above.
In accordance with at least one embodiment of the present application, the content ignition afterburner further comprises:
the vibration-proof heat shield is arranged in the outer wall of the afterburner and is close to the outlet part of the outer wall of the afterburner.
Drawings
FIG. 1 is a schematic illustration of an intrinsic ignition afterburner provided in an embodiment of the present application;
FIG. 2 is a partial schematic view of an intrinsic ignition afterburner provided in an embodiment of the present application;
wherein:
1-afterburner outer wall; 2-confluence ring; 3-an inner cone; 4-rectifying support plates; 5-a fuel spray rod; 6-ignition electric nozzle; 7-vibration-proof heat shield.
For the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions, and furthermore, the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
Detailed Description
In order to make the technical solution of the present application and the advantages thereof more apparent, the technical solution of the present application will be more fully described in detail below with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application, not for limitation of the present application. It should be noted that, for convenience of description, only the portion relevant to the present application is shown in the drawings, and other relevant portions may refer to a general design, and without conflict, the embodiments and technical features in the embodiments may be combined with each other to obtain new embodiments.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of this application should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in this description are merely used to indicate relative directions or positional relationships, and do not imply that a device or element must have a particular orientation, be configured and operated in a particular orientation, and that the relative positional relationships may be changed when the absolute position of the object being described is changed, and thus should not be construed as limiting the present application. The terms "first," "second," "third," and the like, as used in the description herein, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the invention are not to be construed as limited in number to the precise location of at least one. As used in this description, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term and that is listed after the term and its equivalents, without excluding other elements or articles.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description herein are to be construed broadly and refer to 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, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
The present application is described in further detail below with reference to fig. 1-2.
An endo-ignition afterburner comprising:
afterburner outer wall 1;
a converging ring 2 arranged in the afterburner outer wall 1;
an inner cone 3 arranged in the converging ring 2 and provided with an annular gap; the annular notch is positioned at the outlet part of the converging ring 2;
a plurality of rectifying support plates 4 are supported between the converging ring 2 and the inner cone 3 along the circumferential direction;
the fuel spray bars 5 penetrate through the outer wall 1 of the afterburner, the fuel spray ends extend into the space between the converging ring 2 and the inner cone 3, and the top ends are aligned with the annular gaps;
the ignition nozzle 6 penetrates through the outer wall 1 of the afterburner, the ignition end extends into the space between the converging ring 2 and the inner cone 3, and the top end is aligned with the annular gap.
For the connotation ignition afterburner disclosed in the above embodiment, it can be understood by those skilled in the art that the connotation air flow entering the afterburner 1 flows between the converging ring 2 and the inner cone 3, the converging ring 2 and the inner cone 3 form a diffusion flow path, so that the connotation air flow can be diffused and slowed down, meanwhile, the converging ring 2 and the inner cone 3 are circumferentially distributed with the rectifying support plates 4, so that the connotation air flow can be rectified, thereby creating favorable conditions for ignition and tissue combustion in the afterburner, and in addition, the diffusion flow path can adopt an isostatic pressure gradient modeling so as to avoid air flow separation caused by rapid diffusion and speed reduction, reduce diffusion loss of the connotation air flow and avoid combustion oscillation.
For the connotation ignition afterburner disclosed in the above embodiment, it can be further understood by those skilled in the art that the outer connotation air current entering the afterburner 1 can flow into the space between the afterburner outer wall 1 and the converging ring 2, can mix with the connotation air current flowing out of the diffusion flow path at the outlet part of the converging ring 2, and can form a stable backflow area after the outlet part of the converging ring 2, and form a locally stable annular backflow area at the annular gap part of the inner cone 3, when the afterburner is ignited, fuel can be injected into the annular gap from the fuel injection port of the fuel injection end side wall of each fuel injection rod 5 to the space between the converging ring 2 and the inner cone 3, and the fuel is injected into the annular gap from the fuel injection port of the top end side wall of each fuel injection rod 5, wherein the fuel injection port of each fuel injection end side wall of each fuel injection rod 5 enters the diffusion flow path, is gasified under the effect of the inner connotation air current, and is injected into the backflow area after the outlet part of the converging ring 2, so as to form a rich oil area, and the top end of each fuel injection port of the fuel injection port of each fuel rod 5 is injected into the annular gap.
In some optional embodiments, in the connotation ignition afterburner, the bottom wall of the annular gap is coaxial with the inner cone 3, and an included angle between the bottom wall and the side wall is between 115 degrees and 130 degrees, so that radar detectability of the aeroengine is reduced, and stealth performance of the aeroengine is ensured.
In some alternative embodiments, in the connotation ignition afterburner, each rectifying support plate 4 is internally provided with a fuel injection cavity, and the side wall is provided with a plurality of fuel injection holes; each fuel oil spraying hole is communicated with the corresponding fuel oil spraying cavity;
the oil injection end of each oil injection rod 5 correspondingly stretches into one oil injection cavity, and the top end stretches out from the bottom of the corresponding rectifying support plate 4.
For the connotation ignition afterburner disclosed in the above embodiment, it can be understood by those skilled in the art that the fuel sprayed from each fuel spray rod 5 can be uniformly sprayed into the diffusion flow path through the corresponding fuel spray cavity and the corresponding fuel spray hole thereof, gasification can easily occur under the action of the connotation air flow, and the fuel can be sprayed into the backflow area behind the outlet part of the confluence ring 2, and the main body part of each fuel spray rod 5 is positioned in the corresponding rectifying support plate 4, so that the flow area of the diffusion flow path is not additionally occupied, and the pressure loss on the flow of the connotation air flow can be reduced.
In some alternative embodiments, in the connotation ignition afterburner, the distance between each fuel injection hole and the tail edge of the corresponding rectifying support plate 4 is no more than 100mm, the fuel injection hole is matched with the tail edge of the corresponding rectifying support plate 4, is close to the outlet part of the converging ring 2, and the fuel injected by the fuel injection hole can reach the backflow area after the outlet part of the converging ring 2 in a short time, so that spontaneous combustion in a diffusion flow path is avoided.
In some alternative embodiments, in the connotation ignition afterburner, the ignition electric nozzle 6 is correspondingly arranged through one rectifying support plate 4, and the top end of the ignition electric nozzle extends out from the bottom of the corresponding rectifying support plate 4, so that the occupation of the flow area of the diffusion flow path is reduced, and the pressure loss on the flow of connotation airflow is reduced.
In some alternative embodiments, in the content ignition afterburner, the ignition electric nozzle 6 is located in the axial direction of the inner cone 3 and after each fuel spray rod 5, the top oil injection port of each fuel spray rod 5 injects fuel in the annular gap, can firstly diffuse and slow down in the annular gap and mix with content air flow, and has lower speed and is mixed with content air flow into combustible gas when reaching the top end of the ignition end of the rear ignition electric nozzle 6, so that the combustible gas can be easily ignited by the ignition electric nozzle 6, thereby ensuring reliable ignition of the afterburner.
In some alternative embodiments, two of the ignition tips 6 are distributed 180 ° in the connotation ignition afterburner described above.
In some alternative embodiments, the content ignition afterburner described above further comprises:
the vibration-proof heat shield 7 is provided in the afterburner outer wall 1, near the outlet of the afterburner outer wall 1, and can be mounted by means of corresponding brackets.
For the content ignition afterburner disclosed in the above embodiment, it can be understood by those skilled in the art that the content air flow can partially flow into the cavity between the afterburner outer wall 1 and the vibration-proof heat shield 7, so as to cool the afterburner outer wall 1 and the vibration-proof heat shield 7, avoid the afterburner outer wall 1 from being ablated, and the cavity between the afterburner outer wall 1 and the vibration-proof heat shield 7 can form a vibration-absorbing and vibration-suppressing device similar to a helmholtz resonator with the cooling holes on the vibration-proof heat shield 7, so as to suppress the oscillation combustion in the afterburner.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
Having thus described the technical aspects of the present application with reference to the preferred embodiments illustrated in the accompanying drawings, it should be understood by those skilled in the art that the scope of the present application is not limited to the specific embodiments, and those skilled in the art may make equivalent changes or substitutions to the relevant technical features without departing from the principles of the present application, and those changes or substitutions will now fall within the scope of the present application.
Claims (6)
1. An endo-ignition afterburner, comprising:
an afterburner outer wall (1);
a converging ring (2) arranged in the afterburner outer wall (1);
an inner cone (3) which is arranged in the converging ring (2) and is provided with an annular notch; the annular gap is positioned at the outlet part of the converging ring (2);
a plurality of rectifying support plates (4) are supported between the converging ring (2) and the inner cone (3) along the circumferential direction;
the fuel spray bars (5) penetrate through the outer wall (1) of the afterburner, the fuel spray ends extend into the space between the converging ring (2) and the inner cone (3), and the top ends are aligned with the annular notch;
a firing nozzle (6) which penetrates through the outer wall (1) of the afterburner, wherein the firing end extends into the space between the converging ring (2) and the inner cone (3), and the top end is aligned with the annular gap;
the bottom wall of the annular gap is coaxial with the inner cone (3);
the included angle between the side wall and the bottom wall of the annular gap is 115-130 degrees;
the inside of each rectifying support plate (4) is provided with a fuel oil spraying cavity, and the side wall of each rectifying support plate is provided with a plurality of fuel oil spraying holes; each fuel oil spraying hole is communicated with the corresponding fuel oil spraying cavity;
the fuel injection end of each fuel injection rod (5) correspondingly stretches into one fuel injection cavity, and the top end stretches out from the bottom of the corresponding rectifying support plate (4).
2. The content ignition afterburner of claim 1 wherein,
the distance between each fuel injection hole and the tail edge of the corresponding rectifying support plate (4) is not more than 100mm.
3. The content ignition afterburner of claim 1 wherein,
the ignition electrode nozzle (6) correspondingly penetrates through one rectifying support plate (4), and the top end of the ignition electrode nozzle extends out of the bottom of the corresponding rectifying support plate (4).
4. The content ignition afterburner of claim 3 wherein,
the ignition electric nozzle (6) is positioned behind each fuel spray rod (5) in the axial direction of the inner cone body (3).
5. The content ignition afterburner of claim 3 wherein,
the number of the ignition electric nozzles (6) is two, and the ignition electric nozzles are distributed at 180 degrees.
6. The content ignition afterburner of claim 1 wherein,
further comprises:
and a vibration-proof heat shield (7) which is arranged in the afterburner outer wall (1) and is close to the outlet position of the afterburner outer wall (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210864997.XA CN115183274B (en) | 2022-07-21 | 2022-07-21 | Connotation ignition afterburner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210864997.XA CN115183274B (en) | 2022-07-21 | 2022-07-21 | Connotation ignition afterburner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115183274A CN115183274A (en) | 2022-10-14 |
| CN115183274B true CN115183274B (en) | 2023-08-04 |
Family
ID=83521521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210864997.XA Active CN115183274B (en) | 2022-07-21 | 2022-07-21 | Connotation ignition afterburner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115183274B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116293820B (en) * | 2023-04-17 | 2024-06-11 | 中国航发沈阳发动机研究所 | Infrared radiation signal suppression enhancement structure of afterburner of aeroengine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3931707A (en) * | 1975-01-08 | 1976-01-13 | General Electric Company | Augmentor flameholding apparatus |
| CN102538010A (en) * | 2012-02-12 | 2012-07-04 | 北京航空航天大学 | Afterburner integrated with stabilizer and worm wheel rear rectification support plate |
| FR3039220A1 (en) * | 2015-07-24 | 2017-01-27 | Snecma | POSTCOMBUSTION DIPOSITIVE FOR TURBOREACTOR |
| CN114060851A (en) * | 2021-11-15 | 2022-02-18 | 中国航发沈阳发动机研究所 | Subregion partial pressure afterburning oil spray rod based on 3D prints |
| CN114738795A (en) * | 2022-04-14 | 2022-07-12 | 西北工业大学 | Support plate stabilizer with gas mixing function and integrated afterburner |
-
2022
- 2022-07-21 CN CN202210864997.XA patent/CN115183274B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3931707A (en) * | 1975-01-08 | 1976-01-13 | General Electric Company | Augmentor flameholding apparatus |
| CN102538010A (en) * | 2012-02-12 | 2012-07-04 | 北京航空航天大学 | Afterburner integrated with stabilizer and worm wheel rear rectification support plate |
| FR3039220A1 (en) * | 2015-07-24 | 2017-01-27 | Snecma | POSTCOMBUSTION DIPOSITIVE FOR TURBOREACTOR |
| CN114060851A (en) * | 2021-11-15 | 2022-02-18 | 中国航发沈阳发动机研究所 | Subregion partial pressure afterburning oil spray rod based on 3D prints |
| CN114738795A (en) * | 2022-04-14 | 2022-07-12 | 西北工业大学 | Support plate stabilizer with gas mixing function and integrated afterburner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115183274A (en) | 2022-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115200037B (en) | Afterburner of aeroengine | |
| CN111520744B (en) | Burner swirler | |
| CN115200043B (en) | Annular stabilizer ignition afterburner | |
| EP2860454A1 (en) | Fuel injection device | |
| US9376985B2 (en) | Ovate swirler assembly for combustors | |
| CN115183274B (en) | Connotation ignition afterburner | |
| US10731862B2 (en) | Systems and methods for a multi-fuel premixing nozzle with integral liquid injectors/evaporators | |
| US20100275603A1 (en) | Combustor of gas turbine | |
| EP2719952A2 (en) | Fuel nozzle and method of assembling the same | |
| EP2806217B1 (en) | Gas turbine engines with fuel injector assemblies | |
| CN114165813B (en) | Pneumatic auxiliary integrated support plate stabilizer with double oil way oil supply | |
| CN115200045B (en) | External culvert ignition afterburner | |
| CN115164230B (en) | Afterburner of aircraft engine | |
| US8413446B2 (en) | Fuel injector arrangement having porous premixing chamber | |
| CN115183270A (en) | Wall-mounted stabilizer ignition afterburning chamber | |
| CN211119489U (en) | Blunt body structure stable combustion chamber | |
| CN113048513B (en) | Multistage oil spout hole center cone integration afterburner | |
| CN115200038A (en) | Afterburner adopting air-cooled serial support plate for rectification | |
| CN116025926B (en) | Afterburner of aeroengine | |
| CN116025926A (en) | Afterburner of aeroengine | |
| CN115962484B (en) | Afterburner for aero-engine | |
| CN115200042B (en) | Afterburner adopting air-cooled tandem and split support plate rectification | |
| US11892168B2 (en) | Combustor and gas turbine equipped with the same | |
| CN115183269B (en) | Afterburner adopting ceramic-based blades and rectifying support plates for rectification | |
| CN116293799A (en) | Afterburner of aero-engine and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |