CN108844094B - Afterburner adopting planar fan-shaped nozzle for supplying oil - Google Patents
Afterburner adopting planar fan-shaped nozzle for supplying oil Download PDFInfo
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- CN108844094B CN108844094B CN201810219559.1A CN201810219559A CN108844094B CN 108844094 B CN108844094 B CN 108844094B CN 201810219559 A CN201810219559 A CN 201810219559A CN 108844094 B CN108844094 B CN 108844094B
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- afterburner
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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
Abstract
The invention discloses an afterburner adopting a planar fan-shaped nozzle for supplying oil, which belongs to the field of aero-engines.A support plate is arranged on an oil supply device in the afterburner and is uniformly arranged along the circumferential vertical direction of the afterburner; an oil spray rod is radially arranged on the inner side of the support plate, a planar fan-shaped nozzle is radially arranged on the side wall of the oil spray rod, and the cross section of an opening of the planar fan-shaped nozzle is V-shaped; the design of the invention enlarges the fuel spray expansion angle, reduces the number of the nozzles, increases the diameter of the nozzles, simultaneously ensures that the radial and circumferential concentration distribution of the fuel is more uniform, is convenient for the afterburner to reliably and stably burn, and solves the problems in the prior art.
Description
Technical Field
The invention belongs to the field of aircraft engines, and particularly relates to an afterburner adopting a planar fan-shaped nozzle for supplying oil.
Background
Afterburners have gained more and more widespread use on aeroengines since the beginning of the last century. In order to improve the operational performance and flight envelope of a military fighter, the fuel atomization effect in an afterburner must be increased, so that fuel and air are completely mixed, and the fuel is uniformly distributed in space. The quality of the fuel atomization determines the quality of the operating characteristics of the combustion chamber. Therefore, fuel atomization research is an important part of the research of aircraft engines.
At present, a direct injection type fuel nozzle is usually adopted by a fuel injection rod in a common turbofan engine afterburner, the fuel injection expansion angle is small, the atomization effect is poor, the equivalent diameter of the nozzle is small, the problem of blockage of the nozzle is easily caused, and the working stability and reliability of the engine combustor are seriously influenced. With the development of aviation technology, the requirement of modern advanced warplanes on the performance of an aero-engine is higher and higher, the direct injection type nozzle on the oil injection rod in the traditional afterburner is poor in atomization effect and easy to block, the problems of easy coking and uneven distribution of radial and circumferential concentration of fuel oil are more and more prominent when the direct injection type nozzle is heated, the reliable and stable combustion of the afterburner is not facilitated, and the overall performance of the aero-engine is seriously influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention discloses an afterburner adopting a planar fan-shaped nozzle for supplying oil, which adopts the planar fan-shaped nozzle, the nozzle design enlarges the fuel oil spraying expansion angle, reduces the number of nozzles, increases the diameter of the nozzles, simultaneously ensures that the radial and circumferential concentration distribution of the fuel oil is more uniform, is convenient for the afterburner to reliably and stably burn, and solves the problems in the prior art.
The invention is realized by the following steps:
an afterburner adopting a planar fan-shaped nozzle for supplying oil comprises an afterburner, wherein a turbine is arranged in the afterburner along the central axis of the incoming air flow direction; a blender is arranged between the turbine and the side wall of the afterburner; a diffusion section is formed behind the blender, an oil supply device is arranged behind the diffusion section, and a support plate is arranged on the oil supply device and is uniformly arranged along the circumferential vertical direction of the afterburner; the inner side of the support plate is radially provided with an oil spray rod which is close to two side wall surfaces in the support plate. The side wall of the oil spray rod is provided with a plurality of plane fan-shaped fuel nozzles which are arranged along the radius direction of the oil spray rod. The opening of the planar fan-shaped nozzle extends out of the outer wall surface of the support plate; the opening cross section of the plane fan-shaped fuel nozzle is V-shaped.
The quantity that plane fan nozzle arranged along afterburning chamber's radial direction on the lateral wall of fuel spray lance is 1 ~ 20, and the fuel spraying between two radial fan nozzles overlaps each other to fan nozzle opening of plane is perpendicular with gaseous incoming flow direction, and the fan-shaped oil mist that plane fan nozzle formed is awl and is arranged along radial direction, and the fuel of being convenient for atomizes completely, and along afterburning chamber radial space evenly distributed. The overall shape of the spray bar can be achieved by casting, and the planar fan nozzles can be machined by laser drilling, drilling or surface milling.
Further, the number of the planar fan-shaped nozzles is 1-20; the specific quantity is determined according to the fan-shaped angle of the planar fan-shaped nozzle, the radius of the afterburner and the actual size of the oil injection rod, and the mutual overlapping of fan-shaped oil mist sprayed by the planar fan-shaped nozzles in the radius direction of the afterburner is guaranteed. The distance between the position of the planar fan-shaped nozzle and the tail edge of the support plate in the downstream direction is adjusted according to actual conditions, and stable and reliable combustion is achieved behind the support plate.
Further, the fuel injection rod comprises an inlet, an outlet and a fuel flow channel between the inlet and the outlet; the inlet of the oil injection rod is connected with an oil supply pipeline of the oil supply device, and the outlet of the oil injection rod is connected with the planar fan-shaped fuel nozzle.
The plane fan-shaped fuel nozzle comprises a first side surface and a second side surface, a fan-shaped spray expansion angle β is formed by an included angle between the first side surface and the second side surface, the included angle ranges from 30 degrees to 150 degrees, the first side surface and the second side surface play a role in flow guiding, fuel is ejected by a plane fan-shaped oil surface, namely the first side surface and the second side surface, the angle of an oil cone surface is determined by the fan-shaped angle of the nozzle, and initial atomization is achieved.
Furthermore, the number of the oil spraying rods is integral multiple of the number of the support plates, the number of the support plates is 1-20, and the number of the oil spraying rods in the support plates is 1-10.
Furthermore, the nozzle direction of the planar fan-shaped nozzle is vertical to the wall surface of the support plate and is outwards sprayed in a direction vertical to the wall surface of the support plate, and the fan-shaped fuel surface sprayed by the planar fan-shaped nozzle is along the radius direction of the circumference of the afterburner. The nozzle direction of the plane fan-shaped nozzle is vertical to the wall surface of the support plate and sprays outwards towards the wall surface, and the fan-shaped fuel oil surface sprayed by the plane fan-shaped nozzle is mutually overlapped with the fan-shaped oil mist sprayed by the adjacent plane fan-shaped nozzle along the radius direction of the afterburner. The fan-shaped oil mist sprayed by the plane fan-shaped nozzles on the adjacent oil spray bars are mutually overlapped, the fuel oil mist between two radial fan-shaped nozzles on the same oil spray bar is mutually overlapped, the adjacent fan-shaped oil mist on the same oil spray bar is mutually overlapped, and meanwhile, the adjacent fan-shaped oil mist in the circumferential direction on the adjacent support plates is mutually overlapped.
The air incoming flow direction is vertical to the fan-shaped oil mist sprayed from the plane fan-shaped nozzle, and under the pneumatic action of the incoming flow airflow, the fuel oil mist is crushed and mixed with air to realize further atomization, so that the fuel oil is uniformly distributed along the radial direction and the circumferential direction, and reliable and stable combustion in the afterburner is facilitated.
Furthermore, the outlet of the afterburner along the air inflow direction is also sequentially provided with a low-pressure compressor, a high-pressure compressor and a main combustion chamber connected with the high-pressure compressor; the primary combustion chamber is connected to the turbine.
Compared with the prior art, the invention has the beneficial effects that:
1) the combination of the oil spray rod and the support plate reduces the flow resistance loss caused by the oil spray rod in the afterburner, so that the total pressure loss is greatly reduced; meanwhile, the fuel spray rod is internally provided with an external contained cold air for cooling, so that fuel in the fuel spray rod is prevented from coking and blocking a fuel spray hole;
2) compared with a direct injection type nozzle in the prior art, the oil spray rod of the invention adopts the planar fan-shaped nozzle, so that the expansion angle of fuel oil spray is enlarged, the number of nozzles can be greatly reduced, the spatial overlapping between two fan-shaped spray cones is realized by adjusting the size of the fan-shaped angle, the fuel oil is more uniformly distributed in the radial direction, and the combustion characteristic in a combustion chamber is improved;
3) the design of the invention reduces the number of nozzles on the space radius, and the equivalent diameter of the plane fuel fan-shaped nozzle is larger under the condition of the same fuel flow, thereby effectively preventing the blockage problem caused by coking of the fuel nozzle and facilitating the reliable and stable combustion of the combustion chamber under various complex working conditions.
Drawings
FIG. 1 is a schematic view of an afterburner of the present invention using a flat fan nozzle for fuel supply;
FIG. 2 is a schematic structural view of a support plate, an oil spray rod and a planar fan nozzle of an afterburner for supplying oil by adopting the planar fan nozzle;
FIG. 3 is a schematic view of the arrangement of the planar fan nozzles on the fuel spray bar of the present invention;
FIG. 4 is a schematic view of a planar fan nozzle of the present invention;
the fuel injection device comprises a 001-plane fan-shaped nozzle, 120-a first side face, 121-a second side face, 1-a low-pressure compressor, 2-a high-pressure compressor, 3-a main combustion chamber, 4-a turbine, 5-a blender, 6-a diffusion section, 7-a support plate, 8-an afterburning chamber, 9-an oil supply device, 10-an oil spray rod and 100-an air inflow direction.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, in the afterburner of the present invention, which uses a planar fan nozzle for supplying oil, a low pressure compressor 1, a high pressure compressor 2, and a main combustion chamber 3 connected to the high pressure compressor 2 are sequentially disposed at an outlet along an incoming air flow direction 100 (indicated by an arrow in the figure); the main combustion chamber 3 is connected with a turbine 4, and a blender 5 is arranged between the side walls of the turbine 4 and the afterburner 8; a diffusion section 6 is formed behind the blender 5, an oil supply device 9 is arranged behind the diffusion section 6, a support plate 7 is arranged on the oil supply device 9, and the support plate 7 is uniformly arranged along the circumferential vertical direction of the afterburner 8; an oil spray rod 10 is radially arranged on the inner side of the support plate 7, and a planar fan-shaped nozzle 001 is arranged on the side wall of the oil spray rod 10 along the radial direction of the afterburner 8; the opening of the plane fan-shaped nozzle 001 extends out of the outer wall surface of the support plate 7; the opening cross section of the planar fan fuel nozzle 001 is V-shaped.
As shown in fig. 2, fig. 2 is a schematic structural view of the support plate, the oil spray rod and the planar fan-shaped nozzle of the present invention. The oil injection rods 10 are located on the inner side wall surface of the support plate 7, the support plate 7 is uniformly arranged along the circumferential vertical direction of the afterburner 8, the arrangement number of the oil injection rods 10 is selected to be integral multiple of the number of the support plate 7, the number of the support plate 7 is 1-20, and the number of the oil injection rods 10 in the support plate 7 is 1-10. A plane fan-shaped nozzle 001 is radially arranged on the side wall of the oil spray rod 10; the opening of the planar fan nozzle 001 extends to be flush with the outer wall surface of the support plate 7.
As shown in fig. 3 to 4, the opening cross section of the planar fan-shaped fuel nozzle 001 is V-shaped, the incoming air flow is perpendicular to the fuel spray sector, the planar fan-shaped fuel nozzle 001 includes a first side surface 120 and a second side surface 121, namely, the fuel spray sector, a fan-shaped spray expansion angle β is formed between the first side surface 120 and the second side surface 121, the included angle ranges from 30 degrees to 150 degrees, namely, the spray expansion angle of the planar fan-shaped fuel nozzle ranges from 30 degrees to 150 degrees, the fan-shaped angle is arranged along the radius direction of the afterburner 8, and the number of nozzles is 1 to 20.
The working process of the invention is as follows:
the fuel oil enters from an inlet of an oil injection rod 10, reaches a planar fan-shaped fuel oil nozzle 100 through a fuel oil flow passage, passes through the flow guide effect of a group of surfaces extending transversely of the fan-shaped nozzle surface and the first side surface 120 and the second side surface 121 of the fan-shaped nozzle under the extrusion effect of the group of surfaces, is sprayed out by the planar fan-shaped oil surface to realize initial atomization, the incoming air flow is vertical to the fan-shaped oil surface, and the fuel oil spray is crushed under the pneumatic action of the incoming air flow and is mixed with air to realize further atomization, so that the fuel oil is uniformly distributed along the radial direction and the circumferential direction, and uniform, stable and reliable combustion is realized after a support plate 7; the distance between the arrangement position of the planar fan-shaped nozzle 001 and the tail edge of the support plate 7 in the downstream direction is adjusted according to actual conditions, and stable and reliable combustion is achieved behind the support plate 7.
The preferred embodiments of the present invention described above with reference to the accompanying drawings are only for illustrating the embodiments of the present invention and are not to be construed as limiting the aforementioned object of the invention and the contents and scope of the appended claims, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention still fall within the technical and claim protection scope of the present invention.
Claims (6)
1. An afterburner adopting a planar fan-shaped nozzle for supplying oil comprises an afterburner (8), wherein a turbine (4) is arranged in the afterburner (8) along the central axis of an air inflow direction, a blender (5) is arranged between the turbine (4) and the side wall of the afterburner (8), a diffuser section (6) is formed behind the blender (5), and an oil supply device (9) is arranged behind the diffuser section (6), the afterburner is characterized in that a support plate (7) is arranged on the oil supply device (9) and is uniformly arranged along the circumferential vertical direction of the afterburner (8), an oil spray rod (10) is radially arranged on the inner side of the support plate (7), a planar fan-shaped nozzle (001) is radially arranged on the side wall of the oil spray rod (10), an opening of the planar fan-shaped nozzle (001) extends out of the outer wall surface of the support plate (7), the opening cross section of the planar fan-shaped nozzle (001) is V-shaped, the V-shaped opening of the planar fan-shaped nozzle (001) is perpendicular to the air inflow direction (100), the planar fan-shaped nozzle (001) comprises a first side surface (120) and a second side surface (3930-to- β degree included angle between the first side surface (121).
2. An afterburner with oil supply by means of planar fan nozzles as defined in claim 1, characterized in that the number of said planar fan nozzles (001) arranged on the side wall of the fuel injection lance (10) in the radial direction of the afterburner (8) is 1-20.
3. An afterburner with fuel supply using a flat fan nozzle as claimed in claim 1, characterized in that said fuel injection lance (10) comprises an inlet, an outlet and a fuel flow path between the inlet and the outlet; wherein the inlet of the oil spray rod (10) is connected with an oil supply pipeline of the oil supply device (9), and the outlet is connected with the planar fan-shaped nozzle (001).
4. The afterburner with oil supply by planar fan nozzles as claimed in claim 1, wherein the number of the oil spray bars (10) is an integral multiple of the number of the support plates (7), the number of the support plates (7) is 1-20, and the number of the oil spray bars (10) in the support plates (7) is 1-10.
5. An afterburner with oil supply by planar fan nozzles as claimed in claim 1, characterized in that the direction of the nozzle opening of the planar fan nozzle (001) is perpendicular to the wall surface of the support plate (7) and is directed outwards perpendicular to the wall surface of the support plate (7), and the plane fan nozzle (001) sprays fan-shaped fuel oil along the radius direction of the circumference of the afterburner (8).
6. The afterburner adopting the planar fan-shaped nozzle for supplying oil according to claim 1, wherein the outlet of the afterburner (8) along the air inflow direction is sequentially provided with a low-pressure compressor (1), a high-pressure compressor (2) and a main combustion chamber (3) connected with the high-pressure compressor (2); the main combustion chamber (3) is connected with a turbine (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219559.1A CN108844094B (en) | 2018-03-16 | 2018-03-16 | Afterburner adopting planar fan-shaped nozzle for supplying oil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219559.1A CN108844094B (en) | 2018-03-16 | 2018-03-16 | Afterburner adopting planar fan-shaped nozzle for supplying oil |
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| Publication Number | Publication Date |
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| CN108844094A CN108844094A (en) | 2018-11-20 |
| CN108844094B true CN108844094B (en) | 2020-07-07 |
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| CN201810219559.1A Active CN108844094B (en) | 2018-03-16 | 2018-03-16 | Afterburner adopting planar fan-shaped nozzle for supplying oil |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111306577B (en) * | 2020-02-21 | 2021-10-26 | 南京航空航天大学 | Direct-injection fan-shaped nozzle applied to afterburner concave cavity structure |
| CN113606610B (en) * | 2021-07-27 | 2022-10-21 | 南京航空航天大学 | Pneumatic auxiliary atomization direct injection type nozzle applied to afterburner |
| CN113915323A (en) * | 2021-09-28 | 2022-01-11 | 常州华创航空科技有限公司 | Lubricating oil pipe and transmission case |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7437876B2 (en) * | 2005-03-25 | 2008-10-21 | General Electric Company | Augmenter swirler pilot |
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2018
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| CN103196155A (en) * | 2012-01-04 | 2013-07-10 | 通用电气公司 | System comprising fuel nozzles for injecting fuel in a gas turbine combustor |
| 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 |
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| CN204923077U (en) * | 2015-06-10 | 2015-12-30 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Multi -jet spray nozzle and be equipped with gas turbine of this nozzle |
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