CN114636168A - Novel air swirler who contains torrent emergence structure - Google Patents
Novel air swirler who contains torrent emergence structure Download PDFInfo
- Publication number
- CN114636168A CN114636168A CN202210259360.8A CN202210259360A CN114636168A CN 114636168 A CN114636168 A CN 114636168A CN 202210259360 A CN202210259360 A CN 202210259360A CN 114636168 A CN114636168 A CN 114636168A
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- Prior art keywords
- swirler
- torrent
- ring
- novel air
- flow path
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- 239000002245 particle Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 22
- 238000000889 atomisation Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000000295 fuel oil Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
- F23R3/12—Air inlet arrangements for primary air inducing a vortex
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cyclones (AREA)
Abstract
The invention provides a novel air swirler with a turbulence generating structure, which relates to the field of aeroengine combustion chambers and comprises: outside ring chamber, inside ring chamber, the whirl blade, the extension board, the torrent takes place the structure, this swirler comprises inner ring torrent flow path and outer loop torrent flow path, a large amount of air passes through outer loop torrent flow path, under the effect of whirl blade, produce the backward flow district at the rear, there is not the whirl blade in the inner ring torrent flow path, only less air flows through, it takes place the structure to be the torrent close to the exit portion, this structure is by round toper tooth, a ring, and round hemisphere granule combination forms, the speed that this structure will slow down the air current forms the torrent of certain degree, can consolidate and strengthen the backward flow district that the swirler rear portion formed, form and take off body flame, and make and obtain better atomization effect from swirler center department spun fuel, this kind of novel swirler is favorable to improving combustion efficiency, strengthen the job stabilization nature of combustion chamber, enlarge gas turbine's working range.
Description
Technical Field
The invention belongs to the field of gas turbine engines, and particularly relates to a novel air swirler with a turbulence generation structure.
Background
The aircraft engine is known as the 'heart' of the aircraft and is the main power device of the modern aircraft. The combustion chamber is one of three major components of an aircraft engine, and can realize the normal conversion of fuel from chemical energy to heat energy under various atmospheric conditions and flight conditions so as to provide power for an aircraft.
The airflow structure in the combustion zone is critical to the organization of efficient combustion. The swirler is an important part of a common aeroengine combustion chamber at present, has a great influence on the working performance of the combustion chamber, and plays a role of a flame stabilizer in a flame tube. The fuel oil atomization device has the functions of generating high-speed rotating jet flow in a combustion chamber to form a heat reflux area, increasing the relative speed of air flow and oil drops and improving the formation of fuel oil atomization and mixed gas. Therefore, the performance of the swirler will affect the overall performance of the combustor.
Research experiments show that after strong rotational flow is adopted in a combustion chamber with a finite element, the heat dissipation of flame to the chamber wall is increased, and the stability of the flame is not good. In recent years, scientists have begun to adopt design criteria of low swirl strength, combination of swirl and non-swirl for higher combustion efficiency and engine operating range.
For a conventional swirler, if the vanes of the swirler are straight vanes, the tangential component of the velocity of the airflow outlet in the quarter-radius area is relatively small and the swirling effect is not obvious by measuring the velocity distribution at the outlet of the swirler, so that the tangential component of the velocity of the airflow outlet in the quarter-radius area can be considered for cooling and mixing fuel oil, the airflow flow can be reasonably distributed to facilitate stable combustion of a combustion chamber, the length of the combustion chamber is reduced, a detached flame is formed, and the service life of parts of the combustion chamber is prolonged.
Disclosure of Invention
The invention mainly solves the technical problem of providing a novel air swirler with a turbulence generation structure. Compared with the prior art, the cyclone separator adopts a design mode of combining rotational flow and non-rotational flow, one cyclone is divided into an inner channel and an outer channel, when airflow passes through the outer annular cavity, cyclone is generated at the rear under the action of rotational flow blades to form a backflow area, the other part of airflow passes through the inner annular cavity, and under the action of the turbulence generating device at the outlet, the axial speed is weakened, and the turbulence degree of the airflow is enhanced. Therefore, the stability of the backflow area can be effectively enhanced, the atomization degree of fuel oil is improved, the combustion efficiency is improved, and the working range of the engine is enlarged.
Technical scheme
The invention aims to provide a novel air swirler with a turbulence generation structure.
The technical scheme of the invention is as follows:
1. a novel air swirler with turbulence generating structure, comprising: structure, its characterized in that take place for outside ring chamber, inside ring chamber, whirl blade, extension board, torrent: the structure and the function of the outer annular cavity (1) and the swirl vanes (2) inside the annular cavity are the same as those of an axial swirler used for a conventional gas turbine engine, the inner annular cavity (3) is nested in the middle under the action of a support plate (4), and a turbulence generation structure (5) is arranged at the position close to the outlet of the inner annular cavity: conical teeth (6), hemispherical particles (8) are uniformly distributed on the bottom surface of the inner ring along the circumferential direction, and a circular ring (7) is arranged on the top surface of the inner ring and is positioned between the conical teeth and the hemispherical particles.
2. A novel air swirler that contains torrent emergence structure which characterized in that: the swirler can be formed by casting, the diameter of the swirler is 80-110mm, the length of the swirler is 50-70mm, the number and the installation angle of the swirling vanes can be designed according to the requirements of different gas turbine engines, and the design scheme must meet the light-tight principle, namely, the swirler should not transmit light when viewed from the front and back directions.
3. A novel air swirler that contains torrent emergence structure which characterized in that: the turbulence generating structure is positioned at the rear 1/3 part of the inner annular cavity, wherein the height of the annular ring is 1-1.5mm, the width is about 0.8-1.0mm, the height of the conical teeth and the hemispherical grains is 1.5-2.5mm, the conical teeth and the hemispherical grains are in staggered distribution when viewed from the front and the rear in the rotating direction, and the back surfaces of the conical teeth and the hemispherical grains are both flat surfaces and are used for preventing the backflow of airflow; the axial distance between every two of the conical teeth, the hemispherical grains and the circular ring is 4-6mm.
4. A novel air swirler that contains torrent emergence structure which characterized in that: the distance R from the wall surface of the inner annular cavity to the center of the circle is not more than one fourth of the radius R of the swirler at most, so that the air passing through the outer annular swirl flow path is ensured to be enough to form a stable backflow zone at the downstream.
5. A novel air swirler that contains torrent emergence structure which characterized in that: according to the application of different gas turbines, the outer ring cyclone flow path can be improved on the basis of the principle, and a radial cyclone, a multistage cyclone and the like can be further designed.
The invention has the following beneficial effects:
the new swirler can better distribute the air flow than conventional swirlers used in combustion chambers. The traditional swirler has small air flow and weak swirling action at the position close to the center of the outlet circle, and fuel ejected by the fuel nozzle cannot be well mixed with air, so that incomplete combustion is caused, local high temperature is possibly caused, and the service lives of the swirler and a combustion chamber are influenced.
The novel swirler is provided with an inner ring channel in the traditional swirler, and no swirl vane is arranged in the channel, so that a small amount of air is allowed to pass through the channel to generate turbulence, the mixing of front fuel oil and air flow is enhanced, the combustion efficiency is improved, and a stable backflow area is formed; simultaneously forming a knockout flame to prevent ablation of the fuel nozzle and the swirler structure; the swirler is simple in structure, can be formed by casting and machining, and is long in service life.
Drawings
FIG. 1: overall schematic diagram of novel air swirler with turbulence generating structure
FIG. 2: section view of novel air swirler with turbulence generation structure
FIG. 3: front view of novel air swirler with turbulence generation structure
FIG. 4: schematic view of turbulence generating device of cyclone
In the figure: 1-external ring cavity, 2-swirl vane, 3-internal ring cavity, 4-support plate, 5-turbulence generating structure, 6-conical tooth, 7-circular ring and 8-hemispherical particle.
Detailed Description
The invention will now be further described with reference to the accompanying drawings in which:
with reference to fig. 1, 2, 3 and 4, the invention relates to a novel air swirler with a turbulence generating structure. Fig. 1 is an overall schematic view of a novel air swirler with a turbulence generating structure, fig. 2 is a sectional view of the novel air swirler with the turbulence generating structure, fig. 3 is a front view of the novel air swirler with the turbulence generating structure, and fig. 4 is a schematic view of a turbulence generating device of the swirler.
Part of air is introduced from the head of the combustion chamber, wherein a small part of air flows into the inner ring turbulence flow path, passes through the turbulence generation structure after passing through the inner ring cavity, the conical teeth can enable the air flow to generate certain fluctuation in the tangential direction, the circular ring enables the air flow to generate certain streaming in the radial direction, so that a boundary layer in the air flow process is damaged, the turbulence degree of the air flow is further improved after passing through hemispherical particles, a downstream backflow zone is consolidated, the atomization degree of fuel oil is improved, a large amount of air enters the outer ring swirl flow path, the effect is the same as that of a normal axial swirler, air swirl is formed at the rear, a backflow zone is generated, and the combustion is stable.
Claims (5)
1. A novel air swirler with turbulence generating structure, comprising: structure, its characterized in that take place for outside ring chamber, inside ring chamber, whirl blade, extension board, torrent: the structure and the function of the outer annular cavity (1) and the swirl vanes (2) inside the annular cavity are the same as those of an axial swirler used for a conventional gas turbine engine, the inner annular cavity (3) is nested in the middle under the action of a support plate (4), and a turbulence generation structure (5) is arranged at the position close to the outlet of the inner annular cavity: conical teeth (6), hemispherical particles (8) are uniformly distributed on the bottom surface of the inner ring along the circumferential direction, and a circular ring (7) is arranged on the top surface of the inner ring and is positioned between the conical teeth and the hemispherical particles.
2. A novel air swirler that contains torrent emergence structure which characterized in that: the swirler can be formed by casting, the diameter of the swirler is 80-110mm, the length of the swirler is 50-70mm, the number and the installation angle of the swirl vanes can be designed according to the requirements of different gas turbine engines, and the design scheme must meet the light-tight principle, namely, the swirler should not transmit light when being viewed from the front direction and the rear direction.
3. A novel air swirler that contains torrent emergence structure which characterized in that: the turbulence generating structure is positioned at the rear 1/3 part of the inner annular cavity, wherein the height of the annular ring is 1-1.5mm, the width is about 0.8-1.0mm, the height of the conical teeth and the hemispherical grains is 1.5-2.5mm, the conical teeth and the hemispherical grains are in staggered distribution when viewed from the front and the rear in the rotating direction, and the back surfaces of the conical teeth and the hemispherical grains are both flat surfaces and are used for preventing the backflow of airflow; the axial distance between every two of the conical teeth, the hemispherical grains and the circular ring is 4-6mm.
4. A novel air swirler that contains torrent emergence structure which characterized in that: the distance R from the wall surface of the inner annular cavity to the center of the circle is not more than one fourth of the radius R of the swirler at most, so that the air passing through the outer annular swirl flow path is ensured to be enough to form a stable backflow zone at the downstream.
5. A novel air swirler that contains torrent emergence structure which characterized in that: according to the application of different gas turbines, the outer ring cyclone flow path can be improved on the basis of the principle, and a radial cyclone, a multistage cyclone and the like can be further designed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210259360.8A CN114636168A (en) | 2022-03-15 | 2022-03-15 | Novel air swirler who contains torrent emergence structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210259360.8A CN114636168A (en) | 2022-03-15 | 2022-03-15 | Novel air swirler who contains torrent emergence structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114636168A true CN114636168A (en) | 2022-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210259360.8A Pending CN114636168A (en) | 2022-03-15 | 2022-03-15 | Novel air swirler who contains torrent emergence structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114636168A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986034A (en) * | 2009-07-28 | 2011-03-16 | 通用电气公司 | Gas turbine burner |
| CN102345869A (en) * | 2010-07-29 | 2012-02-08 | 通用电气公司 | Fuel nozzle with air admission shroud |
| CN105650676A (en) * | 2016-03-15 | 2016-06-08 | 西北工业大学 | Rotational flow blade of combustion chamber of ground gas turbine |
| CN107543201A (en) * | 2017-07-25 | 2018-01-05 | 西北工业大学 | A kind of oil-poor directly injection and mixing low pollution combustor |
-
2022
- 2022-03-15 CN CN202210259360.8A patent/CN114636168A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986034A (en) * | 2009-07-28 | 2011-03-16 | 通用电气公司 | Gas turbine burner |
| CN102345869A (en) * | 2010-07-29 | 2012-02-08 | 通用电气公司 | Fuel nozzle with air admission shroud |
| CN105650676A (en) * | 2016-03-15 | 2016-06-08 | 西北工业大学 | Rotational flow blade of combustion chamber of ground gas turbine |
| CN107543201A (en) * | 2017-07-25 | 2018-01-05 | 西北工业大学 | A kind of oil-poor directly injection and mixing low pollution combustor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220617 |
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| RJ01 | Rejection of invention patent application after publication |