Staged combustion chamber head with entrainment pre-filming plate structure

Abstract

The invention provides a staged combustion chamber head with an entrainment pre-film plate structure. The staged combustion chamber head comprises a pre-combustion stage and a main combustion stage arranged outside the pre-combustion stage in a sleeving mode. The main combustion stage comprises an inner ring and a sleeve arranged outside the inner ring in a sleeving mode. The inner ring is provided with a plurality of spray holes distributed in the circumferential direction. An annular air channel is formed between the inner ring and the sleeve. Axial rotational flow blades and an entrainment pre-filming plate are sequentially arranged in the air channel from front to back. The multiple axial rotational flow blades are arranged, and the multiple axial rotational flow blades are arranged in the circumferential direction. The entrainment pre-filming plate is annular and is formed by arranging a plurality of segmented arcs in the circumferential direction. The spray holes are arranged right opposite to the arc ridge of the entrainment pre-filming plate, and two segmented arcs are arranged between any two adjacent spray holes. The radial heights of the front end and the rear end of the arc ridge are both larger than the radius of the outer surface of the inner ring and smaller than the radius of the inner surface of the sleeve.

Description

technical field [0001] The disclosure relates to the technical field of aviation gas turbine combustors, in particular to a staged combustor head with a plume pre-diaphragm structure. Background technique [0002] With the gradual progress of aero-engine technology, the combustion chamber of the engine is more organized by staged combustion to achieve high temperature rise or low emission. In the staged combustion, the pre-combustion stage mostly adopts the diffusion combustion method, and the main combustion stage mostly adopts the pre-mixed combustion method. This type of combustion chamber has applied for a number of related patents at home and abroad, such as the US patent application numbers 6363726 and 6389815 applied by GE Corporation of the United States, and the patents 201210335832. [0003] The oil quantity of the main fuel stage is mainly sprayed from the main fuel stage, and finally, under the action of the swirl airflow generated by the axial swirl blades, the...

AI Technical Summary

Problems solved by technology

Most of the disclosed pre-membrane plates are cylindrical or conical pre-membrane plates, such as the structure shown in Chinese Patent Application No. 201610860748.8; or blade pre-membrane plates, such as the structure shown in Chinese Patent Application No. 201810472110.6; both have a certain improvement in fuel mist However, there is still room for further research and improvement

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