离心风机旋转失速时频特性及渐进过程分析

The Frequency Domain Characteristics and Gradual Process Analysis of Rotating Stall of Centrifugal Fan

为了对风机失速时频特性进行分析,利用国内电站广泛应用的离心风机,进行了旋转失速实验,提取风机从正常状态到旋转失速发展过程的压力信号,运用Fourier变换以及小波包分析对压力信号的时频特性以及失速渐进过程进行分析,从而在一定程度上为失速的检测和控制奠定基础。

To analysis the time-frequency characteristics and the gradual process characteristics of stall, the experiment of rotating stall was carried out on the centrifugal fan, which is widely used in domestic power plant. Te development pressure signals from the normal to the stall are extracted. Then, the pressure signals are analyzed about the time-frequency characteristics and the gradual process characteristics of stall. Thus, a foundation to the further research of the rotating stall to centrifugal fan is laid.