基于小波变换的离心风机弱失速特征分析

结合实验室4—73Nd8D风机进行了旋转失速试验，将谐波小波变换引入旋转失速的研究，通过对弱失速阶段机壳压力信号的时频分析，确定了弱失速阶段的失速能量间歇现象、频率特征以及在弱失速阶段对调节作用的敏感性，从而说明离心风机的弱失速阶段是一个应该引起运行、维修人员足够重视的重要区域，这也为离心风机旋转失速的深入开展研究莫定了基础。

Analysis of Weak Rotating-stall Characteristics of a Centrifugal Fan Based on Wavelet Transformation

A rotating stall test was conducted of a lab 4 73 No.8d fan with harmonic wavelet transformation being introduced into the study of rotating stall. Through a time frequency analysis of fan casing pressure signals during a weak rotating stall stage determined were the rotating stall energy intermittency, frequency characteristics and sensibility of regulation function at that stage. This indicates that the weak rotating stall stage of the centrifugal fan is a major region worthy of close attention on the part of operational and maintenance personnel. In addition, the foregoing also has laid a firm basis for the further in depth research of centrifugal fan rotating stall.