摘要
为了探究某型涡轴发动机喘振发生位置规律,采集并分析了台架喘振试验时进气道、轴流压气机叶尖、轴流压气机出口和离心压气机出口的压力信号。采用连续小波时频变换对压力信号进行特征提取,以小波系数作为喘振信号特征,阈值为小波系数最大值的10%,结果表明:某型涡轴发动机的轴流压气机总是比离心压气机先发生喘振,喘振在轴向上由进气道向离心压气机传递的同时,在周向上也沿着压气机转子叶片旋转方向传递。对某型号发动机进行实时喘振监测时,监测轴流压气机能比监测离心压气机更早发现喘振,在后续某型涡轴发动机改型设计时,可增加轴流压气机的喘振裕度来提升整机防喘能力。
In order to investigate the surge position of turboshaft engine, the pressure signals of air inlet,axial compressor tip,axial compressor outlet and centrifugal compressor outlet were collected and analyzed during the bench surge test. Continuous wavelet time-frequency transform was used to extract the characteristics of the pressure signal. The wavelet coefficients were used as the characteristics of the surge signal,and the threshold value was 10% of the maximum value of the wavelet coefficients. The results showed that the axial flow compressor of a turboshaft engine surged earlier than the centrifugal compressor, and the surge was transmitted from the inlet to the centrifugal compressor in the axial direction, and also along the rotor blade rotation in the circumferential direction. When the real-time surge monitoring was carried out for a certain type of engine,the surge can be detected earlier by monitoring the axial compressor than by monitoring the centrifugal compressor. In the subsequent modification design of a certain type of turboshaft engine,the surge margin of the axial compressor can be increased to improve the antisurge ability of the whole engine.
作者
闫思齐
李本威
王永华
张赟
周鹏宇
YAN Siqi;LI Benwei;WANG Yonghua;ZHANG Yun;ZHOU Pengyu(Aeronautical Foundation Institute,Naval Aviation University,Yantai Shandong 264001,China;Unit 92326,People's Liberation Army,Zhanjiang Guangdong 524005,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2022年第2期263-273,共11页
Journal of Aerospace Power
基金
国家自然科学基金(51505492)
山东省自然科学基金(ZR2020ME125)。
关键词
涡轴发动机
压气机
喘振试验
特征提取
小波变换
turboshaft engine
compressor
surge test
feature extraction
wavelet transform
