Flame stabilizers for backflow combustor

Abstract

The invention belongs to the technical fields of turbine engines and particularly relates to flame stabilizers for a backflow combustor. The section of the pneumatic stabilizing part of each stabilizer is a semi-circle-arc pipe, and the stabilizers have the features of stable flame, strong vortexes and high flame stabilizing capacity. Arc-shaped sections are adopted for the lower half parts of the stabilizers, barriers to other jet flow holes can be reduced, and the total pressure loss is reduced. Cavities are designed in the flame stabilizers. The wall faces of the flame stabilizers can be cooled effectively, low-speed air can be supplemented to specific regions of the combustor as well, and the effect of stabilizing flame is achieved. According to the scheme, through the simple structural form, the combustor can work efficiently and stably, the lean oil flameout boundary can be enlarged obviously, combustion efficiency is improved and meanwhile production cost is lowered; and it is proved by tests that by means of the jet flow holes in the cooling manner, it can be guaranteed that the service life of the wall faces of the jet flow hole part of the combustor is up to 300 h under the conditions that the temperature of the combustor rises over 800 K and cooling air is higher than 500 K.

Description

technical field [0001] The invention belongs to the technical field of turbine engines, and in particular relates to a flame stabilizer used in a recirculation combustion chamber. Background technique [0002] The main combustion chamber of the turbine engine is prone to failures of engine flameout due to unstable combustion due to the relatively high inlet flow rate and relatively small oil and gas conditions. In this case, it is easy to waste manpower and material resources to greatly improve the combustion chamber, and at the same time increase the research and development costs of the combustion chamber. Contents of the invention [0003] (1) Technical problems to be solved [0004] The technical problem to be solved by the present invention is: how to improve the efficiency of the combustion chamber under small working conditions and high inlet flow velocity by partially improving the main combustion zone of the head part of the combustion chamber without changing th...

AI Technical Summary

Problems solved by technology

[0002] In the main combustion chamber of the turbine engine, under the conditions of high inlet flow rate and relatively small oil and gas, it is easy to cause the engine to stall due to unstable combustion

In this case, it is easy to waste manpower and material resources if the combustion chamber is greatly improved, and at the same time increase the research and development costs of the combustion chamber

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