某型发动机旋转失速压力信号的频谱分析

为解决现役某型发动机的喘振问题，对该型发动机逼喘过程中压气机首先失速级压力信号进行频谱分析，发现了该型发动机在正常状态、进入和退出旋转失速状态、完全发展的旋转失速状态压力信号频谱的动态演化特征，并用频谱分析的方法成功确定了旋转失速边界。

Analysis of Rotating Stall Pressure Signal of a Certain Engine for Spectrum

This paper, aiming at solving the surge problem of a certain engine on the active service, analyzes the spectrum of pressure signal measured from the starting stage resulting in rotating stall. The results of spectrum analysis show the dynamic evolving characteristics of the pressure signal spectrum under the conditions of normal state, entering and out of rotating stall states, and completely developed rotating stall state. And in this paper the boundary of rotating stall is successfully determined by adopting the spectrum analysis method.