A low-pollution combustor using bubble atomizing nozzles in the main combustion stage

Abstract

The invention discloses a low-pollution combustor with a main combustion grade adopting an effervescent atomizer. A single annular cavity structure is adopted. The low-pollution combustor comprises a diffuser, an outer combustor case, an inner combustor case, a flame tube outer wall, a flame tube inner wall and a combustor head. A graded combustion scheme is adopted for the combustor. The combustor head is divided into a precombustion grade and the main combustion grade. A diffusive combustion mode with stable rotational flow is adopted for the precombustion grade, and the precombustion grade serves as a stable combustion source of the combustor. A premixing and pre-evaporation combustion mode is adopted for the main combustion grade, and even combustion is facilitated. A center grading structure is adopted for the low-pollution combustor, and the precombustion grade is simple in structure; the unique effervescent atomizer is adopted for the main combustion grade for fuel oil injection, so that fuel oil has high atomization quality, fuel oil atomization and mixing are facilitated, the distribution evenness of the fuel oil is further improved, and thus pollutant discharging of whole landing and take-off (LTO) circulation of the combustor of an aero-engine is further lowered.

Description

technical field [0001] The invention relates to the technical field of aviation gas turbines, in particular to a low-pollution combustion chamber in which the main combustion stage adopts bubble atomization nozzles. The combined method ensures stable combustion in the combustion chamber and reduces pollution emissions under small working conditions; the main combustion stage is located on the periphery of the pre-combustion stage, and adopts the premixed pre-evaporation combustion method, which is mainly used to reduce pollution under large working conditions Emissions, thereby reducing the pollution emissions of the entire landing and take-off (LTO) cycle of the aeroengine. Background technique [0002] The basic performance and structural distribution of modern aero-engine combustors have reached a fairly high level, but for modern aero-engine combustors, there are still a lot of problems and challenges. The development and application of new materials, new processes, new ...

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Problems solved by technology

[0023] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and to provide a low-pollution combustion chamber in which the main combustion stage adopts bubble atomizing nozzles by using the premixed pre-evaporation combustion technology. The combustion stage is in the center, adopting a combination of diffusion combustion and premixed combustion, while ensuring stable combustion in the combustion chamber, and reducing pollution emissions under small working conditions; The method is mainly used to reduce the pollution emission under large working conditions, thereby reducing the pollution emission of the entire LTO cycle of the aero-engine

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