基于脉动压力的压气机气动稳定性分析  

Aerodynamic Stability Analysis of the Compressor Based on Pulsating Pressure

作　　者：田琳[1] 高莎莎[1] 申世才[1] TIAN Lin;GAO Sha-sha;SHEN Shi-cai(Chinese Flight Test Establishment, Xi'an Shaanxi 710089, China)

机构地区：[1]中国飞行试验研究院,陕西西安710089

出　　处：《机械研究与应用》2019年第1期65-67,共3页Mechanical Research & Application

摘　　要：以飞机不同迎角飞行时压气机中的脉动压力为研究对象,运用短时傅立叶变换的信号处理的方法将高采样率的数据转化到时频域进行分析,利用无量纲化的特征值对压气机的稳定性进行定量的评估,同时可对其不稳定性的趋势给予判断。旨在阐述了一种基于脉动压力的气动稳定性分析方法,在飞行试验中,可用此方法判断压气机的稳定性以及不稳定趋势,为飞行安全提供一定的保障。In this paper, taking the pulsating pressure in the air compressor at different angles of attack as the research object, the data with high sampling rate is transformed to the time-frequency domain with the short-time Fourier transform signal processing method for analysis. The stability of the compressor is evaluated quantitatively by using the dimensionless characteristic value;at the same time, the tendency of its instability is judged. This paper presents an aerodynamic stability analysis method based on pulsating pressure. In flight tests, the method can be used to determine the stability and instability trend of the compressor, which can provide certain guarantee for the flight safety.

关 键 词：脉动压力 短时傅立叶变换 特征值 气动稳定性 飞行安全 

分 类 号：V233.7[航空宇航科学与技术—航空宇航推进理论与工程]