Standing vortex cavity rotational flow atomization device for head of flame tube

Abstract

The invention relates to the field of main combustion chamber design of an aero-engine, in particular to a standing vortex cavity rotational flow atomization device for a head of a flame tube. The standing vortex cavity rotational flow atomization device comprises an outer swirler, a nozzle shell body, a supporting rod, a standing vortex cavity, an inner swirler, a main oil pipe, an auxiliary oilpipe and a fuel pipe, wherein the nozzle shell body comprises an outer cylinder, a middle cylinder body and an inner cylinder, a main nozzle is formed in the wall surface of the outer cylinder, a cooling through hole is formed in the wall surface of the standing vortex cavity, a middle air flow channel is formed between the outer cylinder and the outer swirler, a main oil cavity is formed betweenthe outer cylinder and the middle cylinder body, an auxiliary oil cavity is formed between the middle cylinder body and the inner cylinder, and an air inlet channel is formed between the inner cylinder and the standing vortex cavity. The device has the advantages that the structure is simple, staged combustion of an main combustion chamber of the aero-engine, and the defects in the prior art are solved.

Description

technical field [0001] The invention relates to the design field of the main combustion chamber of an aero-engine, in particular to a vortex cavity swirl atomization device used for the head of a flame cylinder. Background technique [0002] At present, with the development of aero-engine technology, the design of the main combustion chamber of the aero-engine tends to be high-temperature and low-pollution gradually. Many problems such as low combustion efficiency and high exhaust pollution can no longer meet the current design requirements. [0003] In order to meet the above requirements, those skilled in the art have improved the design of the swirl atomization device at the head of the flame tube in the main combustion chamber to realize the hierarchical and partitioned combustion organization, so as to meet the current requirements. [0004] At present, the swirling atomization device at the head of the flame tube in the main combustion chamber is mainly composed of a ...

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Problems solved by technology

[0005] 1. When the engine is in high working condition, the pressure in the main combustion chamber is high, and the fuel near the nozzle is relatively concentrated, causing problems such as smoke, carbon deposits, and reduced combustion efficiency;

[0006] 2. When the engine is in a small working condition, the fuel supply to the main combustion chamber is low, the atomization level of the nozzle is poor, the combustion stability is poor, and flameout is prone to occur;

[0007] 3. It is impossible to achieve good atomization and oil-gas matching under all working conditions, and the exhaust pollution is high

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