Print Email Facebook Twitter Dynamics of isolated vortex cavitation Title Dynamics of isolated vortex cavitation Author Pennings, P.C. Bosschers, J. Westerweel, J. Van Terwisga, T.J.C. Faculty Mechanical, Maritime and Materials Engineering Department Marine and Transport Technology Date 2015-07-31 Abstract The dynamic behaviour of vortex cavitation on marine propellers may cause inboard noise and vibration, but is not well understood. The main goal of the present study is to experimentally analyse the dynamics of an isolated tip vortex cavity generated at the tip of a wing of elliptical planform. Detailed high-speed video shadowgraphy was used to determine the cavity deformations in combination with force and sound measurements. The cavity deformations can be divided in different modes, each of which show a distinct dispersion relation between frequency and wavenumber. The dispersion relations show good agreement with an analytical formulation. Finally, experimental support is given to the hypothesis that the resonance frequency of the cavity volume variation is related to a zero group velocity. Subject cavitationhydrodynamic noisevortex dynamics To reference this document use: http://resolver.tudelft.nl/uuid:d4145c6d-048e-42f7-8821-bc3a03ebf34c Publisher Cambridge University Press ISSN 0022-1120 Source https://doi.org/10.1017/jfm.2015.379 Source Journal of Fluid Mechanics, 778, 2015 Part of collection Institutional Repository Document type journal article Rights (c) 2015 Cambridge University PressThis is an Open Access article, distributed under the terms of the Creative Commons Attributionlicence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Files PDF 319147.pdf 5.59 MB Close viewer /islandora/object/uuid:d4145c6d-048e-42f7-8821-bc3a03ebf34c/datastream/OBJ/view