Abstract
The acoustic pulse emitted from a bubble detaching from a submerged orifice begins with a rarefaction before the bubble has detached. By implementing an experimental technique where the acoustic pulse measured from a hydrophone was synchronised with the image acquisition from a high-speed camera the behaviour of the bubble surface can be observed during the initial stage of the acoustic emission. The bubble is found to detach slightly before the local minimum pressure measured in the acoustic signal.
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Acknowledgments
The authors acknowledge the support of the Australian Research Council through LIEF grant funding and the Defence Science Technology Organisation. Marcus Fedrizzi was supported by an Australian Postgraduate Award while undertaking this research.
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Fedrizzi, M., Soria, J. (2016). Pre-detachment Acoustic Emission of a Bubble Emerging from an Orifice. In: Zhou, Y., Lucey, A., Liu, Y., Huang, L. (eds) Fluid-Structure-Sound Interactions and Control. Lecture Notes in Mechanical Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-48868-3_19
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DOI: https://doi.org/10.1007/978-3-662-48868-3_19
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Online ISBN: 978-3-662-48868-3
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