航空发动机燃油分布器故障分析与参数优化

Failure analysis and parameter optimization for fueldistributor for aeroengine

关键词:  燃油分布器  转速掉转  故障分析  参数优化

Key words:  Fuel distributor  Speed oscillation  Fault analysis  Parameter optimization

摘要:

燃油分布器对供给发动机的燃油流量进行调节,进而改变发动机的转子转速、涡轮前温度等状态参数,它的工作特性也影响着发动机的加速性、稳定性等性能参数。在发动机地面台架试车过程中,发动机出现了转速下掉的故障,初步认为是燃油分布器工作不正常导致的。在对该型燃油分布器工作原理分析的基础上,利用AMESim软件构建相应的仿真模型,再现了工程实践中出现的发动机转速掉转的故障现象,分析并对其结构参数进行了优化。仿真结果为排故、系统的性能了解和改善提供了技术依据,本项研究已经成功应用于工程实践。

Abstract:

Fuel distributor adjusts the supply of engine fuel flow. Thereby, it affects such state parameters of the aeroengine as rotor speed, turbine inlet total temperature, etc. and its operating characteristics also affect the engine speed, stability and other performance parameters of aeroengine. It occurred that certain engine speed swung in the ground test bed process. The reason for which was due to the fuel distributor not working properly in preliminary view. Based on the analysis of working principle of this type of fuel distributor, the corresponding simulation model in the software AMESim was built to reproduce the phenomena of engine speed swing appearing while in use, analyze the cause for faults and optimize the parameters of its structure. The simulation results provide the technical basis for troubleshooting, understanding and improving the performance of the system, and this study has been successfully applied to engineering practice.