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  • APAC-S-21-00131 (1)

    Rights statement: This is the author’s version of a work that was accepted for publication in Applied Acoustics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Acoustics, 182, 2021 DOI: 10.1016/j.apacoust.2021.108289

    Accepted author manuscript, 3.18 MB, PDF document

    Embargo ends: 13/07/22

    Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License

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Application of Spectral Kurtosis on vibration signals for the detection of cavitation in centrifugal pumps

Research output: Contribution to journalJournal articlepeer-review

E-pub ahead of print
  • Georgios Mousmoulis
  • Christos Yiakopoulos
  • George Aggidis
  • Ioannis Antoniadis
  • Ioannis Anagnostopoulos
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Article number108289
<mark>Journal publication date</mark>30/11/2021
<mark>Journal</mark>Applied Acoustics
Volume182
Number of pages17
Publication StatusE-pub ahead of print
Early online date13/07/21
<mark>Original language</mark>English

Abstract

The detection of cavitation formation in hydraulic turbomachinery has been widely investigated due to its significant impact on their steady and dynamic operation. The aim of this study is the application of Spectral Kurtosis tool in order to effectively detect the impulsive shock waves generated during the implosion of vapour bubbles. The methodology is applied and evaluated on the vibration signals obtained from two different semi-open impellers. The effects of loading conditions, along with the different geometrical characteristics of each impeller are examined. The test rig is manufactured from Plexiglas parts in order to be able to visualise and verify the presence of cavities in the rotating impeller. The results under initial cavitating conditions show that the high frequency implosions of vapour bubbles interact with the low frequency passing of the rotating blades and compose part of the vibration signal. The application of the band pass filter, with central frequency and bandwidth estimated from the Fast Kurtogram, to the original signal allows to extract this information both in time and in frequency domain, and to correlate the periodic impulsive behaviour with the blade passing frequency of the impeller. The present results support the establishment of a robust detection cavitation criterion in centrifugal pumps and show that Spectral Kurtosis is a useful tool for the prevention of related faults in centrifugal pumps.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Applied Acoustics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Acoustics, 182, 2021 DOI: 10.1016/j.apacoust.2021.108289