Original title: Influence of the spheroid prolongation on the drag force
Authors: Lukerchenko, Nikolay ; Keita, Ibrahima ; Kvurt, Y. ; Miles, Jiří
Document type: Papers
Conference/Event: Engineering Mechanics 2011 /17./, Svratka (CZ), 2011-05-09 / 2011-05-12
Year: 2011
Language: eng
Abstract: The drag force acting on a spheroid moving perpendicularly to its axis of rotation in water was studied experimentally. Along the spheroid axis, which is normal to its axis of rotation, a round narrow hole was bored. The spheroid moved along a thin vertical thread stretched in water. A video system recorded the spheroid motion and the spheroid velocity was determined from the record. The drag force coefficient was calculated from the balance of forces acting on the spheroid. Two oblate, two prolate spheroids and one sphere with ratio of the axes 0.67; 0.81; 1.33; 2 and I (sphere), respectively, with approximately the same volumes, were used. The friction coefficient between the thread and spheroid was determined from the comparison of the experimental and calculated motions of the sphere, for which the drag force coefficient is known. The dependence of the drag force coefficient of the spheroid on the ratio of its semi-axes was obtained.
Keywords: drag force coefficient; spheroid
Project no.: CEZ:AV0Z20600510 (CEP), GA103/09/1718 (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2011, ISBN 978-80-87012-33-8

Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0197271

Permalink: http://www.nusl.cz/ntk/nusl-42806


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Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers