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Cloud Cavitation: The Good, The Bad and the Bubbly

Brennen, Christopher E. (2008) Cloud Cavitation: The Good, The Bad and the Bubbly. In: WIMRC FORUM 2008 -- Cavitation: Turbo-machinery & Medical Applications, 7-9 July 2008, University of Warwick, UK. (Unpublished) http://resolver.caltech.edu/CaltechAUTHORS:20111213-112942130

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Abstract

In many cavitating liquid flows, when the number and concentration of the bubbles exceeds some critical level, the flow becomes unsteady and large clouds of cavitating bubbles are periodically formed and then collapse when convected into regions of higher pressure. This phenomenon is known as cloud cavitation and when it occurs it is almost always associated with a substantial increase in the cavitation noise and damage. These increases represent serious problems in devices as disparate as marine propellers, cavitating pumps and artificial heart valves. This lecture will present a brief review of the analyses of cloud cavitation in simplified geometries that allow us to anticipate the behavior of clouds of cavitation bubbles and the parameters that influence that behaviour. These simpler geometries allow some anticipation of the role of cloud cavitation in more complicated flows such as those in cavitating pumps.


Item Type:Conference or Workshop Item (Lecture)
Additional Information:My sincerest thanks to the graduate students and postdoctoral fellows who contributed to the results described, Luca d'Agostino, Douglas Hart, Sanjay Kumar, Beth McKenney, Yi- Chun Wang, Garrett Reisman, Fabrizio d'Auria, Mark Duttweiler, Al Preston and Keita Ando as well as to my colleague Tim Colonius. I am also appreciative of the support from the Office of Naval Research who sponsored a good fraction of the research described. Finally I am very grateful to Lyn Greenhill for his help with the experiments on the wastewater pump and his analysis of the data as well as to other co-workers who provided help and information on that project.
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Office of Naval Research (ONR)UNSPECIFIED
Record Number:CaltechAUTHORS:20111213-112942130
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20111213-112942130
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28452
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Dec 2011 20:51
Last Modified:26 Dec 2012 14:36

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