Observations of shock waves in cloud cavitation
نویسندگان
چکیده
منابع مشابه
Shock wave measurements in cloud cavitation
One of the most destructive (and noisy) forms of cavitation is that referred to as “cloud cavitation” because it involves a large collection of bubbles which behave as a coherent whole. The present paper presents the results of an experimental study of the processes of collapse of a cavitation bubble cloud, specifically that generated by an oscillating hydrofoil in a water tunnel. Measurements ...
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The nonlinear dynamics of a spherical cloud of cavitation bubbles have been simulated numerically in order to learn more about the physical phenomena occurring in cloud cavitation. A finite cloud of nuclei is subject to a decrease in the ambient pressure which causes the cloud to cavitate. A subsequent pressure recovery then causes the cloud to collapse. This is typical of the transient behavio...
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Calculations of the collapse dynamics of a cloud of cavitation bubbles confirm the speculakions of M#rch and his co-workers and demonstrate that collapse occurs as a result of the inward propagation of a shock wave which grows rapidly in magnitude. Results are presented showing the evolving dynamics of the cloud and the resulting far-field acoustic noise.
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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 initi...
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 1998
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112097007830