Influence of the spheroid prolongation on the drag force
1.
SYSNO ASEP
0359490
Document Type
C - Proceedings Paper (int. conf.)
R&D Document Type
Conference Paper
Title
Influence of the spheroid prolongation on the drag force
Author(s)
Lukerchenko, Nikolay (UH-J) Keita, Ibrahima (UH-J) Kvurt, Y. (RU) Miles, Jiří (UH-J)
Source Title
Engineering Mechanics 2011. - Prague : Institute of Thermomechanics AS CR, v. v. i., 2011 / Fuis V.
- ISBN 978-80-87012-33-8
Pages
s. 371-374
Number of pages
4 s.
Action
Engineering Mechanics 2011 /17./
Event date
09.05.2011-12.05.2011
VEvent location
Svratka
Country
CZ - Czech Republic
Event type
EUR
Language
eng - English
Country
CZ - Czech Republic
Keywords
spheroid ; drag force coefficient
Subject RIV
BK - Fluid Dynamics
R&D Projects
GA103/09/1718 GA ČR - Czech Science Foundation (CSF)
CEZ
AV0Z20600510 - UH-J (2005-2011)
UT WOS
000313492700086
Annotation
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.
