A center-staged low-emission combustor head with aerodynamic diversion and flashback prevention
A central classification and anti-tempering technology, applied in combustion chambers, continuous combustion chambers, combustion methods, etc., can solve problems such as easy tempering, poor ignition performance, etc., to prevent structural failure and damage, low cost, and high reliability Effect
Active Publication Date: 2020-08-21
BEIHANG UNIV
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Problems solved by technology
The core of reducing pollution emissions is to control temperature and temperature uniformity. The key is to improve the structure of the combustion chamber and the way of air supply and oil supply. Poor performance and prone to tempering under high operating conditions
Method used
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Embodiment Construction
[0024] Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment:
[0025] Such as figure 1 , figure 2 As shown, the head structure of a center-staged low-emission combustion chamber described in this example with aerodynamic diversion and anti-tempering structure adopts the design of aerodynamic diversion and anti-tempering. The whole is made of stainless steel. Among them, the pre-combustion level oil rod is made by machining to provide fuel for the pre-combustion level. The main combustion stage cyclone 5 is welded to the main combustion stage outer ring 6 to form the main combustion stage air channel; the main combustion stage cyclone 5 is welded to the main combustion stage oil circuit connector 4, forming a The cavity of the main fuel grade oil cavity. The outer ring 6 of the main combustion stage is welded to the anti-tempering ring 7 , and the channel formed between the two structures is the outer ring slit 8 ....
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The invention discloses a center-staged low emission combustion chamber head with a pneumatic guide and anti-backfire structure. The pneumatic guide and anti-backfire design is adopted. Air passing through the head enters flame tubes through a main combustion stage channel, an outer ring channel, a precombustion stage channel and an interstage section channel separately, wherein the air passing through the interstage section channel enters the main combustion stage channel finally, thereby enabling the flow flare angle of oil-gas mixtures in the main combustion stage channel to increase; and thus, the structural design of the interstage section channel has the pneumatic guide function, and the ignition performance is optimized; the generation amount of contaminants is reduced. The air passing through the outer ring channel finally enters the main combustion stage channel radially; and due to existence of the radial velocity, the occurrence of the backfire phenomenon is avoided effectively, so the structural design of the outer ring channel has the anti-backfire function, and the reliability of the head structure is improved. Thus, the structural design of the combustion chamber head has the pneumatic guide and anti-backfire functions.
Description
technical field [0001] The invention relates to the technical field of the head of a low-emission combustion chamber, in particular to a head of a low-emission combustion chamber with an aerodynamic guide and an anti-backfire structure. Background technique [0002] The aviation industry is known as the crown of the industry, and the aero engine is the "heart" of the aircraft. Aeroengines are knowledge- and technology-intensive, highly integrated products with highly sophisticated products and processes, and their design and manufacturing levels represent the overall industrial level of a country. During the development of civil aeroengines, people pay more and more attention to environmental protection requirements, and then the demand for low-emission combustion chambers gradually increases, and the design requirements for them are also getting higher and higher. [0003] With the introduction of relevant international laws and regulations to control pollution emissions, ...
Claims
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IPC IPC(8): F23R3/02F23R3/28
CPCF23R3/02F23R3/28F23R3/286
Inventor 林宇震宋恒张弛王建臣
Owner BEIHANG UNIV