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Flow around a cylinder at the beginning of the critical region. / Dobrosel’skii, K. G.
в: Journal of Applied Mechanics and Technical Physics, Том 57, № 2, 01.03.2016, стр. 293-299.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Flow around a cylinder at the beginning of the critical region
AU - Dobrosel’skii, K. G.
N1 - Publisher Copyright: © 2016, Pleiades Publishing, Ltd. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Results of experiments with a turbulent flow around a transversely aligned circular cylinder located at identical distances from the walls of a rectangular channel are reported. Data on averaged velocity fields around the cylinder are obtained by means of particle image velocimetry (PIV). Based on these fields, the near wake behind the cylinder is studied, and the kinematic characteristics for flow regimes with and without cavitation are compared. Based on the vector fields of averaged velocity, the angles of separation of the boundary layer from the cylinder surface in the considered flow regimes are determined. The drag coefficients of the cylinder for different flow regimes are calculated. It is demonstrated that the vortex region behind the cylinder and the drag coefficient of the cylinder increase in the case with cavitation. It is also shown that vortex shedding from the cylinder may be irregular, despite the fact that this process is quasi-periodic for most of the time.
AB - Results of experiments with a turbulent flow around a transversely aligned circular cylinder located at identical distances from the walls of a rectangular channel are reported. Data on averaged velocity fields around the cylinder are obtained by means of particle image velocimetry (PIV). Based on these fields, the near wake behind the cylinder is studied, and the kinematic characteristics for flow regimes with and without cavitation are compared. Based on the vector fields of averaged velocity, the angles of separation of the boundary layer from the cylinder surface in the considered flow regimes are determined. The drag coefficients of the cylinder for different flow regimes are calculated. It is demonstrated that the vortex region behind the cylinder and the drag coefficient of the cylinder increase in the case with cavitation. It is also shown that vortex shedding from the cylinder may be irregular, despite the fact that this process is quasi-periodic for most of the time.
KW - boundary layer
KW - cavitation
KW - cylinder
KW - drag coefficient
KW - hydrodynamic testbench
KW - PIV
UR - http://www.scopus.com/inward/record.url?scp=84976274750&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=27140439
U2 - 10.1134/S0021894416020127
DO - 10.1134/S0021894416020127
M3 - Article
AN - SCOPUS:84976274750
VL - 57
SP - 293
EP - 299
JO - Journal of Applied Mechanics and Technical Physics
JF - Journal of Applied Mechanics and Technical Physics
SN - 0021-8944
IS - 2
ER -
ID: 27437813