A theoretical analysis and experimental results are presented of the time-frequency characteristics of hydrodynamic cavitation signals. Because of the limitation of the frequency bandwidth of the data acquisition system and the random nature of cavity collapses, the signal consists of transient burst waveforms. The acoustic pulses from collapses in close time proximity mix together and form transient oscillatory bursts. The local oscillation frequency of a burst is related to either the time duration between burst collapses or the cut-off frequency of the system. These results enable the identification and detection of individual cavitation events by the time-frequency characteristics in the vibroacoustic signal.
Time Frequency Characteristics of the Vibroacoustic Signal of Hydrodynamic Cavitation
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received May 2000; revised March 2002. Associate Editor: J. H. Ginsberg.
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Wen, Y., and Henry, M. (September 20, 2002). "Time Frequency Characteristics of the Vibroacoustic Signal of Hydrodynamic Cavitation ." ASME. J. Vib. Acoust. October 2002; 124(4): 469–475. https://doi.org/10.1115/1.1500337
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