Abstract
In this paper, the development, flow structures and characteristics of the cavitation regimes around a hydronautics foil are studied experimentally by employing high speed visualization and particle image velocimetry(PIV). The results show that four cavitating flow regimes are observed: inception cavitation, sheet cavitation, cloud cavitation and supercavitation as the cavitation number is progressively lowered. Some individual cavitation traveling bubbles are observed at incipient cavitation, and attached structure in the leading edge and an oscillatory, wave structure in the trailing edge with sheet cavitation are assessed. Phenomena with large-scale vortex structure and rear re-entrant jet associated with cloud cavitation, and subsequent development in supercavitation are described. The velocity in the cavitation regions in the different cavitation conditions is low compared to that of the free stream, resulting in a shear layer flow with large vorticity between the cavity and the free stream. Large velocity gradient is also observed in the inner layer near the foil surface and near the interface between the main flow and the cavitation flows.
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© 2009 Tsinghua University Press, Beijing and Springer-Verlag GmbH Berlin Heidelberg
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Zhang, M., Wang, G., Li, X. (2009). Study on Cavitating Turbulent Flow around a Hydrofoil. In: Xu, J., Wu, Y., Zhang, Y., Zhang, J. (eds) Fluid Machinery and Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-89749-1_24
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DOI: https://doi.org/10.1007/978-3-540-89749-1_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-89748-4
Online ISBN: 978-3-540-89749-1
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