Time-frequency analysis of the Surge Onset in the Centrifugal Blower

Open Engineering

Horodko Longin¹  Liskiewicz Grzegorz¹ 

[1] Łódz University of Technology, Institute of Turbomachinery 90 - 924 Łódz, ul. Wólczanska 219/223;

关键词: compressor;    blower;    surge;    unstable flow;    time-frequency;    continuous wavelet transform;    CWT;   

DOI  :  10.1515/eng-2015-0040

来源: DOAJ

【 摘 要 】

Time frequency analysis of the surge onset was performed in the centrifugal blower. A pressure signal was registered at the blower inlet, outlet and three locations at the impeller shroud. The time-frequency scalograms were obtained by means of the Continuous Wavelet Transform (CWT). The blower was found to successively operate in four different conditions: stable working condition, inlet recirculation, transient phase and deep surge. Scalograms revealed different spectral structures of aforementioned phases and suggest possible ways of detecting the surge predecessors.

【 授权许可】

Unknown