CN114704853A - High-efficient atomizing centrifugal nozzle - Google Patents
High-efficient atomizing centrifugal nozzle Download PDFInfo
- Publication number
- CN114704853A CN114704853A CN202210304902.9A CN202210304902A CN114704853A CN 114704853 A CN114704853 A CN 114704853A CN 202210304902 A CN202210304902 A CN 202210304902A CN 114704853 A CN114704853 A CN 114704853A
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- Prior art keywords
- air
- nozzle
- centrifugal nozzle
- chamber
- air inlet
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- 230000009471 action Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 238000000889 atomisation Methods 0.000 abstract description 9
- 239000000295 fuel oil Substances 0.000 abstract description 9
- 239000000446 fuel Substances 0.000 description 24
- 239000003921 oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000008021 deposition Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/06—Arrangement of apertures along the flame tube
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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
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/26—Controlling the air flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Abstract
The invention provides a high-efficiency atomizing centrifugal nozzle, which relates to the field of aeroengine combustion chambers, and is characterized in that an annular cavity structure is additionally arranged on the outer surface of a traditional centrifugal nozzle, air is introduced from an air swirler through an air inlet, air and fuel oil are sprayed out at an outlet, the centrifugal nozzle can be cooled, and the flow state of the introduced air can be changed under a special structure, so that the atomization and the crushing of the fuel oil are further promoted, the introduced air quantity can be adjusted within a certain range through a gear structure, and the air and the fuel oil can be better mixed.
Description
Technical Field
The invention belongs to the field of gas turbine engines, and particularly relates to a high-efficiency atomization centrifugal nozzle. The structure can effectively improve the atomization effect of fuel oil and improve the efficiency of the combustion chamber.
Background
The fuel jet crushing and atomizing process is one of the important links in the working process of the gas turbine and has direct and important influence on the combustion process and the emission performance of the gas turbine. The nozzle is reasonably designed by utilizing the flowing characteristic of fuel and the effect of crushing and atomizing fuel jet by air, and a more effective control means can be provided for the organization combustion of the modern gas turbine.
The centrifugal nozzle is a typical pressure nozzle, obtains high relative speed between fuel and surrounding air or gas through conversion from pressure to kinetic energy, and is widely applied to a combustion chamber of a modern aeroengine due to the characteristics of good atomization effect, low cost, light weight and easiness in maintenance in a wide fuel oil flow range.
The working principle of the centrifugal nozzle is as follows: under the action of certain pressure, the fuel enters the cyclone chamber through the tangential holes to rotate, and is added with an axial speed, and when the fuel approaches the outlet, the fuel is sprayed out from a smaller opening in a rotating mode due to the restriction of the contraction wall surface. Under the action of centrifugal force, the fuel can not fill the cyclone chamber, and a hollow vortex communicated with the external atmosphere is arranged in the cyclone chamber, so that the fuel is sprayed out from the nozzle to form an annular tube film. The wall surface at the section of the nozzle outlet does not apply acting force to the fuel oil any more, the fuel oil forms a rotating oil film at the downstream of the nozzle outlet, and small oil drops with extremely small diameters are formed according to a liquid film breaking mechanism.
The swirler itself suffers from inconsistent thermal expansion, thermal protection and carbon deposition on the nozzle face, and several new nozzle designs have been designed for use in various combustion chambers.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-efficiency atomizing centrifugal nozzle. Compared with the prior art structure, the fuel nozzle has the advantages that fuel atomization mechanism and gas flow characteristics are combined, air is led quantitatively from the cyclone, then turbulence grids are used for improving turbulence degree of air, fuel atomization effect is improved by enhancing collision between fuel and air, combustion efficiency and combustion stability are effectively improved, combustion products are improved, and carbon deposition of the fuel nozzle is prevented.
Technical scheme
The invention aims to provide a high-efficiency atomizing centrifugal nozzle.
The technical scheme of the invention is as follows:
a high efficiency atomizing centrifugal nozzle comprising: threaded connection head, fender position structure, inside oil circuit, swirl chamber, inlet port, torrent net, air ring chamber, annular chamber structure, its characterized in that: this novel nozzle passes through threaded connection head (1) and supplies oil pipe zonulae occludens, its inside structure is unanimous with traditional centrifugal nozzle structure, spiral-flow chamber (3) are connected in inside oil circuit (2) promptly, and trompil in the front, install on centrifugal nozzle structure's surface annular chamber structure (4), can adjust fender position structure (5) with control bleed air volume, inlet port (6) are along circumference evenly distributed on annular chamber structure's surface, whole air ring chamber (7) are the expanding shape, turbulence net (8) have been set up in the middle of the air ring chamber, a turbulence degree and the reinforcing heat transfer for improve the air current.
An efficient atomizing centrifugal nozzle, characterized in that: since the introduced air comes from the cyclone, it is necessary to ensure that the nozzles are closely connected with the air cyclone, and the size and shape of the air inlet holes on the annular cavity structure should be the same as the openings on the cyclone, the number of the air inlet holes is 4-6, and the air inlet holes are obliquely opened in the front direction at an angle of 45 degrees with the horizontal direction.
An efficient atomizing centrifugal nozzle, characterized in that: the gear structure consists of a square notch and a stop block on the back of the annular cavity structure, the annular cavity structure can rotate and move axially to a certain extent, the axial position of the annular cavity structure can be fixed under the action of the gear structure, the gears are divided into 3 grades, and when the gear is divided into 1 grade, the air inlet hole is completely opened, and the air flow is maximum; when the gear is in the 2-stage, the effective area of the air inlet hole is 1/2 when the air inlet hole is completely opened; when the gear is 3 grades, the air inlet is completely closed, and the air flow path does not participate in the working process of the nozzle.
An efficient atomizing centrifugal nozzle, characterized in that: the inner ring cavity is an expanding channel, the pressure and the speed of the airflow can be further reduced, the convergence angle of the head of the inner structure is 45 degrees, the convergence angle of the ring cavity structure is 30 degrees, the sectional area of the air ring cavity is not changed at the position of 8-15mm at the tail end of the outlet, and the vector direction of the airflow is ensured to be parallel to the axis.
The invention has the following beneficial effects:
the annular cavity structure is arranged, so that the surface of the fuel nozzle is well cooled, the service life of the nozzle is prolonged, and the phenomenon of carbon deposition in the swirling flow chamber is inhibited; the turbulence grids are arranged in the air annular cavity, so that the pressure and the speed of the introduced air flow are reduced, the turbulence degree is improved, the heat exchange with the wall surface is enhanced, the fuel can be preheated to a certain degree, and the combustion efficiency of the fuel behind the nozzle can be improved; the air ring cavity channel is of an expansion type, and a small section of channel with the same cross section is arranged at an outlet, so that on one hand, the air flow is further depressurized and decelerated, and on the other hand, the flow vector direction of the air flow is changed, so that fuel oil and air have a shearing effect, and the atomization and crushing effect of the fuel oil and the ignition performance of an engine are improved; the aperture of the air inlet hole can be regulated and controlled through the gear structure, certain gears can be selected according to the size of oil supply pressure, the best atomization effect is guaranteed, meanwhile, the rotational flow strength of the swirler can be weakened, and the life of the components and parts is prolonged due to the fact that the detached flame is formed.
Drawings
FIG. 1: overall schematic diagram of efficient atomization centrifugal nozzle
FIG. 2 is a schematic diagram: back structure diagram of high-efficiency atomizing centrifugal nozzle
FIG. 3: sectional view of high-efficiency atomizing centrifugal nozzle
FIG. 4 is a schematic view of: front view of high-efficiency atomizing centrifugal nozzle
In the figure: 1-threaded connector, 2-internal oil circuit, 3-cyclone chamber, 4-annular cavity structure, 5-gear structure, 6-air inlet hole, 7-air annular cavity and 8-turbulence grid
Detailed Description
The invention will now be further described with reference to the accompanying drawings in which:
the invention provides a technical scheme of a high-efficiency atomizing centrifugal nozzle by combining with figures 1, 2 and 3. Fig. 1 is an overall schematic view of a novel fuel nozzle capable of automatically controlling flow, fig. 2 is a back structural view of a high-efficiency atomizing swirler, fig. 3 is a sectional view of a high-efficiency atomizing swirler, and fig. 4 is a front view of a high-efficiency atomizing swirler.
In this novel fuel nozzle, fuel flows to the whirl chamber through inside oil circuit, and under certain pressure, the rotary motion is done in the fuel gets into the whirl chamber through the tangential hole to from the place ahead opening whirl and go out, this part working method is the same with traditional centrifugal nozzle, and the annular chamber structure through special design can be through the bleed in the gas circuit of inlet port follow swirler, and this structure can be under keeping off a position structural role, changes its position through rotation and translation and controls the bleed volume. The air current gets into behind the air ring chamber through the torrent net, and the torrent degree of air current increases, has strengthened the heat transfer with the wall, can preheat fuel to a certain extent again, and then can improve the combustion efficiency of fuel behind the nozzle, discharges to the dead ahead at exit air, and the air has a shearing action to the toper oil film this moment to improved the atomizing crushing effect of fuel, restrained the emergence of the carbon deposit phenomenon in the nozzle, improved the working property of engine.
Claims (4)
1. A high efficiency atomizing centrifugal nozzle comprising: threaded connection head, fender position structure, inside oil circuit, swirl chamber, inlet port, torrent net, air ring chamber, annular chamber structure, its characterized in that: this novel nozzle passes through threaded connection head (1) and supplies oil pipe zonulae occludens, its inside structure is unanimous with traditional centrifugal nozzle structure, spiral-flow chamber (3) are connected in inside oil circuit (2) promptly, and trompil in the front, install on centrifugal nozzle structure's surface annular chamber structure (4), can adjust fender position structure (5) with control bleed air volume, inlet port (6) are along circumference evenly distributed on annular chamber structure's surface, whole air ring chamber (7) are the expanding shape, turbulence net (8) have been set up in the middle of the air ring chamber, a turbulence degree and the reinforcing heat transfer for improve the air current.
2. An efficient atomizing centrifugal nozzle characterized by: since the introduced air comes from the cyclone, it is necessary to ensure that the nozzles are closely connected with the air cyclone, and the size and shape of the air inlet holes on the annular cavity structure should be the same as the openings on the cyclone, the number of the air inlet holes is 4-6, and the air inlet holes are obliquely opened in the front direction at an angle of 45 degrees with the horizontal direction.
3. An efficient atomizing centrifugal nozzle, characterized in that: the gear structure consists of a square notch and a stop block on the back of the annular cavity structure, the annular cavity structure can rotate and move axially to a certain extent, the axial position of the annular cavity structure can be fixed under the action of the gear structure, the gears are divided into 3 stages, and when the gear is 1 stage, the air inlet is completely opened, and the air flow is maximum; when the gear is in the 2-stage, the effective area of the air inlet hole is 1/2 when the air inlet hole is completely opened; when the gear is 3 grades, the air inlet is completely closed, and the air flow path does not participate in the working process of the nozzle.
4. An efficient atomizing centrifugal nozzle, characterized in that: the inner ring cavity is an expanding channel, the pressure and the speed of the airflow can be further reduced, the convergence angle of the head of the inner structure is 45 degrees, the convergence angle of the ring cavity structure is 30 degrees, the sectional area of the air ring cavity is not changed at the position of 8-15mm at the tail end of the outlet, and the vector direction of the airflow is ensured to be parallel to the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210304902.9A CN114704853A (en) | 2022-03-24 | 2022-03-24 | High-efficient atomizing centrifugal nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210304902.9A CN114704853A (en) | 2022-03-24 | 2022-03-24 | High-efficient atomizing centrifugal nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114704853A true CN114704853A (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210304902.9A Pending CN114704853A (en) | 2022-03-24 | 2022-03-24 | High-efficient atomizing centrifugal nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114704853A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206029A (en) * | 2006-12-21 | 2008-06-25 | 中国科学院工程热物理研究所 | Nozzle for minisize gas-turbine combustor |
| CN104456625A (en) * | 2014-11-11 | 2015-03-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Air inlet structure for fuel nozzle of gas turbine |
| WO2016084111A1 (en) * | 2014-11-25 | 2016-06-02 | ENEA - Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile | Multistage hybrid system for the induction, anchorage and stabilization of distributed flame in advanced combustors for gas turbine |
| CN106996579A (en) * | 2017-05-16 | 2017-08-01 | 西北工业大学 | A kind of oil-poor direct jetstream whirl nozzle mould of low-pollution burning chamber of gas turbine |
| CN113108313A (en) * | 2021-04-01 | 2021-07-13 | 中国科学院工程热物理研究所 | Single-way oil supply self-adaptive double-membrane fuel oil atomization device |
-
2022
- 2022-03-24 CN CN202210304902.9A patent/CN114704853A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206029A (en) * | 2006-12-21 | 2008-06-25 | 中国科学院工程热物理研究所 | Nozzle for minisize gas-turbine combustor |
| CN104456625A (en) * | 2014-11-11 | 2015-03-25 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Air inlet structure for fuel nozzle of gas turbine |
| WO2016084111A1 (en) * | 2014-11-25 | 2016-06-02 | ENEA - Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile | Multistage hybrid system for the induction, anchorage and stabilization of distributed flame in advanced combustors for gas turbine |
| CN106996579A (en) * | 2017-05-16 | 2017-08-01 | 西北工业大学 | A kind of oil-poor direct jetstream whirl nozzle mould of low-pollution burning chamber of gas turbine |
| CN113108313A (en) * | 2021-04-01 | 2021-07-13 | 中国科学院工程热物理研究所 | Single-way oil supply self-adaptive double-membrane fuel oil atomization device |
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Application publication date: 20220705 |
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