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Published 1993 | Published
Book Section - Chapter Open

The Micro-Bubble Distribution in the Wake of a Cavitating Circular Cylinder

Abstract

Bubble nuclei populations in the wake of a circular cylinder under cavitating and noncavitating conditions were measured using a Phase Doppler Anemometry (PDA) system. In addition, the mean velocity defect and the turbulent fluctuations were monitored in order to try to understand the nuclei population dynamics within the flow. At the Reynolds numbers of these experiments (20000->33000) the laminar near-wake is fairly steady and under very limited cavitation conditions nuclei accumulate in this wake so that the population there is several orders of magnitude larger than in the upstream flow. Further downstream the population declines again as nuclei are entrained into the wake. However at fifteen diameters downstream the population is still much larger than in the upstream flow.

Additional Information

The authors wish to thank Professor Allan Acosta for helpful advice. This work was carried out with the support of the Office of Naval Research under Grant N00014-91-5-1295.

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