摘要
为研究航空发动机喘振状态下的声学特征,以轴流压气机部件试验为依托,采用在轴流压气机进口机匣壁面布置声压传感器的方法进行了发动机喘振状态下的声学测量。通过分析喘振状态下的声学特征,发现喘振发生时会伴随出现明显的低频声学信号,且该特征与轴流压气机转速无关。根据这一现象,最终应用能量比方法成功地对不同换算转速下的轴流压气机喘振故障进行了诊断,为航空发动机喘振故障研究提供了一种新的思路及方法。
In order to study the acoustic characteristics of aero-engine under surge condition,based on the component test of an axial compressor,the acoustic measurement of an axial-flow compressor under surge condition was carried out by using a sound pressure sensor on the inlet casing wall of the axial-flow com⁃pressor.By analyzing the acoustic characteristics of surge condition,it was found that the obvious low frequency acoustic signal appeared when surge occurred,and this feature was independent of compressor rotating speed.According to this phenomenon,the method of energy ratio is applied to diagnose the faults of axial-flow compressor at different correction speeds which provides a new idea and method for the fault research of surge.
作者
杜军
文璧
刘元是
DU Jun;WEN Bi;LIU Yuan-shi(AECC Sichuan Gas Turbine Establishment,Mianyang 621010,China)
出处
《燃气涡轮试验与研究》
北大核心
2020年第5期33-37,共5页
Gas Turbine Experiment and Research
关键词
航空发动机
轴流压气机
喘振
声学测量
声压特征
能量比
aero-engine
axial-flow compressor
surge
acoustic measurement
acoustic characteristics
energy ratio
