A recirculation combustion chamber that can widen the stable working range

Abstract

The invention provides a reverse flow combustor allowing a wider range of stable running. The reverse flow combustor comprises a diffuser, a combustor casing, a flame cylinder head end wall, a flame cylinder outer wall, a flame cylinder inner wall, a large elbow and a head atomizer. Air enters the combustor through the diffuser; part of the air enters a flame cylinder through the head atomizer; another part of the air enters through a main combustion hole of the flame cylinder and a mixing hole thereof, the remaining enters from a cooling structure. The air and fuel fully mix and combust in the flame cylinder. After passing by two 180-degree turns, the air leaves the combustor. The head atomizer performs atomizing in a mixed mode of pressure centrifugal atomizing and pre-swirling prior to pre-film air atomizing; the fuel is fed through a main oil circuit and an auxiliary oil circuit; the main combustion hole arranged in the outer wall of the flame cylinder and the mixing hole thereof are provided with a hood, jets are avoided flowing to the head, and inner and outer jets are ensured being symmetrical. The range of stable running of the reverse flow combustor can be expanded, and uniformity of fuel gas temperature of an outlet is guaranteed.

Description

technical field [0001] The invention relates to the technical field of an aero-engine recirculation combustion chamber, in particular to a recirculation combustion chamber capable of widening the stable working range. Background technique [0002] The continuous development of aero-engines requires that the combustion chamber, one of the components, needs to work in a wider range of operating conditions. With the continuous improvement of engine power and thrust, the combustion chamber needs to work reliably with a high fuel-air ratio under high operating conditions, and must also ensure stable operation with a very low fuel-air ratio under low operating conditions. A high oil-gas ratio means that the gas temperature in the combustion chamber rises. In order to ensure the reliability of the engine, the outlet temperature field must be more uniform. Stable operation under low working conditions and low oil-gas ratio requires the existence of an oil-rich area in the combustio...

AI Technical Summary

Problems solved by technology

The traditional single oil circuit design narrows the stable working range of the combustion chamber, and the design without mixing holes may deteriorate the outlet temperature distribution quality of the combustion chamber

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