Double-pre-film pneumatic nebulization low pollution combustor head structure

A technology of pneumatic atomization and combustion chamber, which is applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., to achieve the effect of reducing pollution emissions

Active Publication Date: 2013-10-09
BEIHANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: on the premise of ensuring the performance and safety of the combustion chamber, the structural scheme of the combustion chamber head can effectively reduce the aero-engine combustion chamber under different working conditions such as...

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] figure 1 It is a schematic diagram of the engine structure; including a fan 1, a low-pressure compressor 2, a high-pressure compressor 3, a combustion chamber 4, a high-pressure turbine 5, a low-pressure turbine 6, a fan casing 7, guide vanes 8, and an engine outer casing 9. When the engine is working, after the air is compressed by the fan 1, part of the air is discharged through the external duct, and part of it enters the low-pressure compressor 2 for further compression, and then enters the high-pressure compressor 3. The high-temperature and high-pressure air then enters the combustion chamber 4 to burn with fuel, and after combustion The formed high-temperature and high-pressure gas enters the high-pressure turbine 5 and the low-pressure turbine 6, and drives the high-pressure compressor 3, low-pressure compressor 2 and fan 1 respe...

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Abstract

The invention discloses a double-pre-film pneumatic nebulization low pollution combustor head structure. Combustion is organized in a combustor head in a center classification mode. The combustor head structure is divided into a main combustion level and a pre-combustion level. The pre-combustion level is of a double-level swirl cup structure, combustion is organized in a partially premixing mode, and the requirements for combustion stability and pollutant discharge of small working conditions are met. The main combustion level is of an axial swirler double-pre-film structure, combustion is conducted in a combustor in a premixing mode, and combustion pollutants can be effectively reduced through premixing combustion. The double-pre-film type main combustion level structure comprises two stages of independent oil collecting rings, two stages of axial swirlers and two stages of pre-film plate structures. Each stage of independent oil collecting ring is provided with a plurality of beveled fuel injection holes. Each stage of fuel is injected out through the fuel injection holes and then strikes the pre-film plates to be expanded into oil films. The structure is beneficial for fuel classification of the whole combustor under different working conditions, ensures reasonable oil-gas distribution, and further reduces the pollutant discharge level in the whole cycle of landing and taking off of the combustor of an aero-engine.

Description

technical field [0001] The invention relates to the technical field of aviation gas turbines, in particular to a double pre-film aerodynamic atomization low-pollution combustor head structure. Background technique [0002] The basic performance and structural distribution of modern aero-engine combustors have reached a fairly high level, but there are still a lot of problems and challenges for modern aero-engine combustors. The development and application of new materials, new processes, new structures, and new concepts It is the source to ensure its continuous progress. The main development trend of modern civil aeroengine combustors is low-pollution combustion. Combustion chambers of civil aeroengines must meet increasingly stringent aeroengine pollution emission standards. The currently adopted CAEP6 (Committee on Aviation Environmental Protection) standard has very strict regulations on pollutant emissions, especially the requirements for NOx pollution emissions; while...

Claims

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Application Information

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IPC IPC(8): F23R3/58F23R3/38F23R3/30
Inventor 李林林宇震张弛卢加平徐华胜邓远灏
Owner BEIHANG UNIV
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