CN-122015130-A - Multifunctional compact injection flame stabilizer integrating fuel oil flow path and ignition electric nozzle and application thereof

Abstract

The invention relates to the technical field of aeroengines, and discloses a multifunctional compact jet flame stabilizer integrating a fuel oil flow path and an ignition electric nozzle and application thereof, wherein the multifunctional compact jet flame stabilizer comprises a stabilizer main body with a hollow structure, and the ignition electric nozzle is arranged in the hollow structure; the outer wall surface of the stabilizer main body is provided with an oil spray hole, and the oil spray hole is communicated with a fuel supply pipeline of the combustion chamber. The integrated stabilizer can be manufactured in an additive manufacturing mode, the structure is more compact, the number of connecting pieces is reduced, the weight is reduced, the distance from an oil spraying point to the tail edge of the stabilizer is reduced, the stabilizer is suitable for higher inlet temperature and lower incoming flow Mach number, on the other hand, the ignition nozzle is effectively cooled due to the integration of the oil spraying hole and the ignition nozzle on the stabilizer body, and compared with a traditional cantilever structure of the ignition nozzle, the integrated structure can enable the ignition nozzle to meet strength requirements in a smaller diameter.

Inventors

• REN LISHI
• XU XINWEN
• HUANG XIAOFENG
• FENG BIN
• WANG JIANGUO
• ZHANG XUN
• LIN JIANFU
• WU XIAOFEI
• WANG YAJUN

Assignees

• 中国航发四川燃气涡轮研究院

Dates

Publication Date

20260512

Application Date

20260128

Claims (9)

1. 1. The multifunctional compact injection flame stabilizer integrating the fuel oil flow path and the ignition electric nozzle is characterized by comprising a stabilizer main body, wherein one end of the stabilizer main body is fixed on an outer casing, and the other end of the stabilizer main body extends to a position close to the outer wall surface of a central cone; The outer wall surface of the stabilizer main body is provided with an oil spray hole, and the oil spray hole is communicated with a fuel supply pipeline of the combustion chamber.
2. 2. The multi-functional compact jet flame holder of claim 1, wherein the oil supply line comprises a main oil line and a secondary oil line, the oil supply lines of the main oil line and the secondary oil line each being disposed within the hollow structure.
3. 3. The multi-functional compact jet flame stabilizer of claim 2, wherein the stabilizer body cavity is integrally and coaxially provided with a first annular cavity and a second annular cavity to form a fuel injection rod, the first annular cavity being a main fuel passage and the second annular cavity being a secondary fuel passage.
4. 4. A multi-functional compact spray flame stabilizer as recited in claim 3, characterised in that a plurality of support tabs are provided between the outer wall of said fuel injection rod and the inner wall of said stabilizer body cavity.
5. 5. A multi-functional compact spray flame holder as recited in claim 3, characterised in that said fuel injection rod is centrally located with a cavity into which said ignition tip is inserted.
6. 6. The multifunctional compact jet flame stabilizer of claim 5, wherein a plurality of boss structures are arranged in the cavity and are abutted against the outer wall of the ignition electrode nozzle, and the boss structures are circumferentially distributed on the periphery of the outer wall of the ignition electrode nozzle.
7. 7. A multi-functional compact jet flame stabilizer as recited in claim 1, wherein said stabilizer body upstream location is further provided with a plug-in portion insertable into a turbine aft thrust bearing support.
8. 8. The multi-functional compact jet flame holder of claim 1 wherein the ignition oil passage is square in cross section with rounded corners and is located outside the second annular chamber.
9. 9. Use of a multifunctional compact jet flame holder in an afterburner, characterized in that the afterburner has a multifunctional compact jet flame holder according to any one of claims 1-8.

Description

Multifunctional compact injection flame stabilizer integrating fuel oil flow path and ignition electric nozzle and application thereof Technical Field The invention relates to the technical field of aeroengines, and discloses a multifunctional compact jet flame stabilizer integrating a fuel oil flow path and an ignition electric nozzle and application thereof. Background The aircraft has the advantages that the requirements on thrust, cruising ability and weight are improved, so that the incoming air temperature of the afterburner of the aeroengine is gradually increased, and the weight requirements of the engine on the afterburner are also gradually increased. In order to solve the problems, the advanced afterburner at home and abroad generally adopts an integrated structural scheme, a flame stabilizer and a rectifying support plate are integrated together, a fuel pipeline is arranged in the stabilizer, and a fuel nozzle is arranged on the side surface of the bearing support plate, so that the structure is more compact compared with the scheme of the traditional afterburner, and the length of the combustor is effectively shortened. However, in the current integrated design scheme, the fuel injection rod, the ignition electrode nozzle and the flame stabilizer are all independent components and assemblies, and finally, functional devices are formed through assembly, so that the following problems exist in the structural design: 1) The ignition power nozzle is of a long cantilever structure, has long extension distance and poor stress, is easy to be excited by low-frequency vibration, and has invalid structural strength; 2) The number of parts is large, the thermal deformation is not consistent, the thermal deformation difference of the parts arranged on the outer casing and the inner casing in a cold and hot state is large, and the nozzle oil injection is affected by inconsistent thermal deformation and has the risk of shielding; 3) The integrated piece is large in size, the distance from the nozzle on the spray rod to the flame stabilizer is long, and after fuel oil is sprayed out from the nozzle, spontaneous combustion and ablation of the flame stabilizer easily occur before the fuel oil reaches a reflow area of the stabilizer. Disclosure of Invention The invention aims to provide a multifunctional compact injection flame stabilizer integrating a fuel oil flow path and an ignition electric nozzle and application thereof, which can play roles of enabling the structure to be more compact, reducing the number of connecting pieces and the weight, reducing the distance from an oil injection point to the tail edge of the stabilizer so as to adapt to higher inlet temperature and lower incoming flow Mach number, and also can enable the ignition electric nozzle to be effectively cooled. In order to achieve the technical effects, the technical scheme adopted by the invention is as follows: The multifunctional compact injection flame stabilizer integrating the fuel oil flow path and the ignition electric nozzle comprises a stabilizer main body, wherein one end of the stabilizer main body is fixed on an outer casing, and the other end of the stabilizer main body extends to a position close to the outer wall surface of a central cone; The outer wall surface of the stabilizer main body is provided with an oil spray hole, and the oil spray hole is communicated with a fuel supply pipeline of the combustion chamber. Further, the oil supply pipeline comprises a main oil way and an auxiliary oil way, and the oil supply pipelines of the main oil way and the auxiliary oil way are both arranged in the hollow structure. Further, the stabilizer main body inner cavity is integrally and coaxially provided with a first annular cavity and a second annular cavity to form an oil injection rod, the first annular cavity is a main oil way, and the second annular cavity is an auxiliary oil way. Further, a plurality of supporting pieces are arranged between the outer wall of the oil injection rod and the inner wall of the inner cavity of the stabilizer main body. Further, a cavity is formed in the center of the oil injection rod, and the ignition electric nozzle is inserted into the cavity. Further, a plurality of boss structures which are abutted to the outer wall of the ignition electrode nozzle are arranged in the cavity, and the boss structures are circumferentially distributed on the periphery of the outer wall of the ignition electrode nozzle. Further, an inserting part which can be inserted into the rear bearing support plate of the turbine is also arranged at the upstream position of the stabilizer main body. Further, the ignition oil circuit cross section is square with round corners and is positioned at the outer side of the second annular cavity. To achieve the above technical effects, the present invention also provides an application of the multifunctional compact injection flame stabilizer in an afterburner having the multifun