Fuel nozzle and combustion chamber

Abstract

The invention discloses a fuel nozzle and a combustion chamber, which relate to the field of aero-engines and are used for reducing the influence of the fuel nozzle on the irregularity of the air flow in the combustion chamber. The fuel nozzle includes a nozzle inlet, a fuel injection rod body, a nozzle head and a decompression housing; the nozzle inlet and the nozzle head are respectively fixed at both ends of the fuel injection rod rod; the decompression housing surrounds the outside of the fuel injection rod rod , the decompression cover is fixed to at least one of the nozzle inlet, the fuel injection rod body and the nozzle head; wherein, under the same conditions, the air resistance of the decompression cover is smaller than the air resistance of the fuel injection rod body . In the above technical solution, the structure of the decompression outer cover has a weakening effect on the local irregularity of the airflow in the combustion chamber, and the air flow resistance loss of the air flowing through the decompression outer cover is small, which reduces the local irregularity of the inlet air in front of the flame tube and improves the Uniformity of air flow in the combustion chamber.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a fuel nozzle and a combustion chamber. Background technique [0002] Nowadays, the combustors of aero-engines mostly adopt the straight-flow short annular combustor structure, and the work of the annular combustor is sensitive to the inlet flow field generated by the inlet airflow, and a bad inlet flow field will affect the flow field distribution at the outlet of the combustor. This is very unfavorable to follow-up structures such as the working state and life of the turbine. After entering the combustion chamber from the compressor, the airflow enters the head of the combustion chamber and the flame tube respectively, and the structure of the head of the combustion chamber is one of the most important structures of the entire combustion chamber. The airflow entering it will affect the working state of the entire combustion chamber, and One of the biggest influences on inlet airflo...

AI Technical Summary

Problems solved by technology

[0007] The inventors have found that there are at least the following problems in the prior art: the combustion chamber needs to have a good aerodynamic basic design and deal with the local irregularities of the air flow so as to ensure the uniform velocity of the air flow before entering the combustion chamber flame tube distributed

However, the existing technology cannot meet the above requirements

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