Original title: Dynamics of cavitation induced by focused tandem shock waves in water
Authors: Hoffer, Petr ; Šunka, Pavel ; Lukeš, Petr
Document type: Papers
Conference/Event: WDS 2011 - Annual Conference of Doctoral Students /20./, Prague (CZ), 2011-05-31 / 2011-06-03
Year: 2011
Language: eng
Abstract: Cavitation associated with the generation of shock waves in water was examined. To study these processes, a tandem shock wave generator, which generates two cylindrical pressure waves focused by a metallic parabolic reflector to a common focal region, was developed. The temporal evolution of cavitation generated by shock waves at the focal region was determined experimentally using high-temporal-resolution microphotography for a certain time delay between the first and second shock waves. Observation of the focal area also showed jetting cavitation bubbles with diameters of 100 m without presence of any rigid boundary. A theoretical model that provides analytical expressions for the temporal evolution of the pressure inside the cavitation bubbles and parameters of the pressure waveform of the second shock wave at the focal area was used to improve the same measurement by PVDF sensor gauges. On the basis of this model, the amplitudes of the compression and rarefaction parts
Keywords: cavitation bubble; Rayleigh-Plesset equation; shock wave
Project no.: CEZ:AV0Z20430508 (CEP), GA202/09/1151 (CEP)
Funding provider: GA ČR
Host item entry: WDS’11 Proceedings of Contributed Papers: Part II: Physics of Plasmas and Ionized Media, ISBN 978-80-7378-185-9

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0209210

Permalink: http://www.nusl.cz/ntk/nusl-112734


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Research > Institutes ASCR > Institute of Plasma Physics
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