Velocity field measurements of cavitating flows |
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| Authors: | A. L. Tassin C. -Y. Li S. L. Ceccio L. P. Bernal |
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| Affiliation: | (1) Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, 48109-2121, Ml, USA;(2) Department of Aerospace Engineering, University of Michigan, 48109-2121 nn Arbor, Ml, USA |
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| Abstract: | A particle Image Velocimetry (PIV) system has been developed to study the microfluid mechanics of cavitating flows. Planar PIV was used to examine the non-cavitating flow in the thin boundary layer near a hydrofoil surface for the cases of a naturally developing boundary layer and a boundary layer stimulated to turbulence by roughness near the foil leading edge. PIV was also used to examine the flow near the surface of individual cavitation bubbles and incipient attached cavitation. A system was devised to create a single nucleus in the flow upstream of a hydrofoil, and planar PIV was used to study the flow around the resulting traveling cavitation bubble. Velocity vectors were determined close to the solid surfaces and the gas/liquid interfaces of the bubbles. Seeding of the flow with particles did not result in the addition of active cavitation nuclei. |
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