Pre-combustion stage direct injection main combustion stage pre-mixing pre-evaporation three-swirl combustion chamber

Abstract

The invention discloses a pre-combustion stage direct injection main combustion stage pre-mixing pre-evaporation three-swirl combustion chamber. The three-swirl combustion chamber comprises a diffuser, an outer casing, an inner casing, a flame tube, a high-energy ignition electric nozzle, an oil supply pipe and a flame tube head, the flame tube head is composed of a pre-combustion stage and a maincombustion stage, the pre-combustion stage is composed of a first-stage axial beveling hole type swirler, a pre-combustion stage venturi tube and a pre-combustion stage centrifugal nozzle. By adopting staged combustion, particularly special structural design and arrangement modes of the first-stage axial beveling hole type swirler and a second-stage radial beveling hole type swirler and an oil supply mode of the main combustion stage, premixed combustion of the main combustion stage can be realized, so that the purpose of reducing pollution emission of the combustion chamber is achieved, thecomplexity of a main combustion stage oil supply system is reduced while staged oil supply is simplified, the weight is reduced, and meanwhile the risk that a nozzle is coked when main combustion stage fuel oil is supplied in an oil collecting cavity mode can be reduced.

Description

technical field [0001] The invention belongs to the technical field of combustion chambers, and in particular relates to a three-swirl flow combustion chamber with pre-combustion stage direct injection and main combustion stage premixing and pre-evaporation. Background technique [0002] As people pay more and more attention to the living environment and health, people also pay more attention to and strictly control various pollution sources that endanger their own health and damage the environment. Although aeroengines and industrial gas turbines account for a small proportion of the total amount of combustion pollutant emissions, due to their local characteristics, such as near airports and places where industrial gas turbines are used, high concentrations of pollutant emissions will gather. In the air, polluting emissions from all types of aircraft are the only source of high-altitude air pollutants. As a result, emissions from gas turbines, including aero engines and va...

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Problems solved by technology

[0007] Although the above-mentioned aero-engines or ground gas turbines have solved the emission requirements of low-pollution gas turbines to varying degrees, their structures and fuel supply systems are complex, resulting in excessive weight. Aiming at the above shortcomings, a pre-combustion stage direct injection main combustion stage pre-combustion stage is proposed. Mixed and pre-evaporated three-swirl combustor

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