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Cavitation Scaling Experiments With Headforms: Bubble Acoustics

Chizelle, Y. and Ceccio, S. and Brennan, C. and Shen, Y. (1994) Cavitation Scaling Experiments With Headforms: Bubble Acoustics. In: Nineteenth Symposium on Naval Hydrodynamics. National Academy Press , Washington, DC, pp. 72-84. http://resolver.caltech.edu/CaltechAUTHORS:20111222-090408765

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Abstract

Recently Ceccio and Brennen [1][2][3] have examined the interaction between individual traveling cavitation bubbles and the structure of the boundary layer and flow field in which the bubble is growing and collapsing. They were able to show that individual bubbles are often fissioned by the fluid shear and that this process can significantly effect the acoustic signal produced by the collapse. Furthermore they were able to demonstrate a relationship between the number of cavitation events and the nuclei number distribution measured by holographic methods in the upstream flow. Kumar and Brennen [4][5] have further examined the statistical properties of the acoustical signals from individual cavitation bubbles on two different headforms in order to learn more about the bubble/flow interactions. All of these experiments were, however, conducted in the same facility with the same size of headform (5.08cm in diameter) and over a fairly narrow range of flow velocities (around 9m/s). Clearly this raises the issue of how the phenomena identified change with speed, scale and facility. The present paper will describe further results from experiments conducted in order to try to answer some of these important questions regarding the scaling of the cavitation phenomena. These experiments (see also Kuhn de Chizelle et al. [6][7]) were conducted in the Large Cavitation Channel of the David Taylor Research Center in Memphis Tennessee, on similar Schiebe headforms which are 5.08, 25.4 and 50.8cm in diameter for speeds ranging up to 15m/s and for a range of cavitation numbers.


Item Type:Book Section
Additional Information:Large scale experiments like these require help of many people and the authors are very grateful to all of those who helped in this enterprise. We are very grateful to the ONR for their support under contracts N00014-91-J-1426 (SLC) and N00014-91-J-1295 (CEB, YKdC). We are also extremely grateful to the David Taylor Research Center (DTRC) and to their staff including W.B. Morgan for making the use of the LCC possible for us and to both Scott Gowing and James Blanton of DTRC for extensive help with the experiments. Po-Wen Yu from the U. of Michigan also provided important help with the photography.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-91-J-1426
Office of Naval Research (ONR)N00014-91-J-1295
Record Number:CaltechAUTHORS:20111222-090408765
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20111222-090408765
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28562
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:22 Dec 2011 17:25
Last Modified:26 Dec 2012 14:38

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