Song, J. H., Johansen, K. and Prentice, P. (2016) An analysis of the acoustic cavitation noise spectrum: The role of periodic shock waves. Journal of the Acoustical Society of America, 140, pp. 2494-2505. (doi: 10.1121/1.4964633)
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128745.pdf - Published Version Available under License Creative Commons Attribution. 3MB |
Abstract
Research on applications of acoustic cavitation is often reported in terms of the features within the spectrum of the emissions gathered during cavitation occurrence. There is, however, limited understanding as to the contribution of specific bubble activity to spectral features, beyond a binary interpretation of stable versus inertial cavitation. In this work, laser-nucleation is used to initiate cavitation within a few millimeters of the tip of a needle hydrophone, calibrated for magnitude and phase from 125 kHz to 20 MHz. The bubble activity, acoustically driven at f0 = 692 kHz, is resolved with high-speed shadowgraphic imaging at 5 × 106 frames per second. A synthetic spectrum is constructed from component signals based on the hydrophone data, deconvolved within the calibration bandwidth, in the time domain. Cross correlation coefficients between the experimental and synthetic spectra of 0.97 for the f 0/2 and f 0/3 regimes indicate that periodic shock waves and scattered driving field predominantly account for all spectral features, including the sub-harmonics and their over-harmonics, and harmonics of f 0.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Johansen, Kristoffer and Prentice, Dr Paul and Song, Dr Jae Hee |
| Authors: | Song, J. H., Johansen, K., and Prentice, P. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Journal of the Acoustical Society of America |
| Publisher: | Acoustical Society of America |
| ISSN: | 0001-4966 |
| ISSN (Online): | 1520-8524 |
| Published Online: | 12 October 2016 |
| Copyright Holders: | Copyright © 2016 The Authors |
| First Published: | First published in Journal of the Acoustical Society of America 140:2494-2505 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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