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

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