Fuel nozzle and combustor

Abstract

The invention discloses a fuel nozzle and a combustor and relates to the field of aircraft engines. The fuel nozzle is used for reducing influence on airflow irregularity in a combustor from a fuel nozzle. The fuel nozzle comprises a nozzle inlet part, an oil spray rod body, a nozzle head and a pressure reducing outer cover. The nozzle inlet part and the nozzle head are fixed to the two ends of the oil spray rod body respectively. The pressure reducing outer cover surrounds the outer side of the oil spray rod body and is fixed to at least one of the nozzle inlet part, the oil spray rod body and the nozzle head. Under the same condition, air resistance affecting the pressure reducing outer cover is smaller than air resistance affecting the oil spray rod body. According to the technical scheme, the structure of the pressure reducing outer cover has the effect of weakening local irregularity of airflow in the combustor, loss of the resistance of air flowing through the pressure reducing outer cover is small, the local irregularity of the air of an advancing opening of a flame cylinder is reduced, and airflow uniformity in the combustor is improved.

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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