Brennen, C. and Colonius, T. and Wang, Y.-C. and Preston, A. (1999) Cloud Cavitation Phenomena. In: Twenty-Second Symposium on Naval Hydrodynamics. National Academy Press , Washington, DC, pp. 239-253. ISBN 0309065372 http://resolver.caltech.edu/CaltechAUTHORS:BRE22snh99
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This paper describes investigations of the dynamics and acoustics of clouds of cavitation bubbles. Recent experimental and computational findings show that the collapse of clouds of cavitating bubbles can involve the formation of bubbly shock waves and that the focussing of these shock waves is responsible for the enhanced noise and damage in cloud cavitation. The recent experiments and computations of Reisman et al. (1) complement the work begun by Morch and Kedrinskii and their co-workers (2,3,4) and demonstrate that the very large impulsive pressures generated in bubbly cloud cavitation are caused by shock waves generated by the collapse mechanics of the bubbly cavitating mixture. Here we describe computational investigations conducted to explore these and other phenomena in greater detail as part of an attempt to find ways of ameliorating the most destructive effect associated with cloud cavitation. Understanding such bubbly flow and shock wave processes is important because these flow structures propagate the noise and produce the impulsive loads on nearby solid surfaces in a cavitating flow. How these shocks are formed and propagate in the much more complex cloud geometry associated with cavitating foils, propeller or pump blades is presently not clear. However, the computational investigations reveal some specific mechanisms which may be active in the dynamics and acoustics of these more complex flows.
|Item Type:||Book Section|
|Additional Information:||Our profound thanks to the Office of Naval Research for the support which it provided under contract N00014–97–1–0002 and to the technical monitor Edwin Rood who sponsored much of the research described herein.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Christopher Brennen|
|Deposited On:||20 Oct 2004|
|Last Modified:||26 Dec 2012 08:39|
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