Fluid Structure Around A Tilted Rectangular
Cylinder Near A Solid Wall And Induced Loading
Author(s)
S. Malavasi, E. Zappa & A. Cigada
Abstract
The main goal of this paper is to investigate the effects of an asymmetric
confined flow developing around a cylinder with a rectangular cross-section at
different attack angles. Previous studies faced this problem analyzing change of
the drag and lift force coefficients due to the proximity of a fixed plate parallel to
the mean flow and fixed in the vicinity of the cylinder. In this paper an original
application of particle image velocimetry technique was used to investigate the
mean fluid structures around rectangular cylinders with aspect ratios of 3 and 4.
The kinematics characterization of the flow field has been quantified through the
transversal dimension of the wake and the position of the stagnation point on the
frontal area of the obstacle. These parameters have been compared with the mean
force coefficients on the cylinder. The non-symmetric boundary conditions were
obtained in an open chamber wind tunnel, putting a fixed plate parallel to the
mean flow at one side of the cylinder; on the other side an almost free flow can
be assumed. The comparison between the kinematics parameters of the flow
structure and the dynamic coefficients provides useful information to the
phenomenon understanding.
Keywords: confined flow, rectangular cylinder, flow induced loading.
1 Introduction
The paper focuses on providing new insights and knowledge of the mechanisms
governing the flow field around a tilted rectangular cylinder near a solid wall,
with particular attention to the study of the mean flow around the cylinder.
The problem of fluid dynamic forces acting on a rectangular cylinder was
studied by different Authors, such as Naudasher and Wang [3], Norberg [4] and
Deniz and Staubli [5] that considered the cylinder immersed in unbounded flow.
Keywords
confined flow, rectangular cylinder, flow induced loading.
Related Book
Other papers in this volume
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