In
this
paper,
the
hydrodynamic
characteristics
of
a
hyperbolic
cylinder
under
periodic
pulsating
flow
are
studied.
The
non-uniform
turbulent
is
formed
by
periodically
oscillating
wing
structure
placed
upstream
cylinder.
influence
different
oscillation
velocities
and
amplitudes
horizontal
distance
between
on
downstream
studied,
results
indicate
that
mainly
determined
leading-edge
vortices
trailing-edge
vortex
shedding
itself.
Further,
has
an
obvious
owing
to
difference
in
diffusion
range
vortex.
Also,
lead
attachment
cylinder,
which
indicates
positive
or
negative
drag
coefficient.
Moreover,
critical
value
amplitude
exists
for
each
velocity
value,
so
subjected
minimum
force
incoming
flow.
Jurnal Rekayasa Mesin,
Journal Year:
2024,
Volume and Issue:
15(1), P. 257 - 272
Published: May 15, 2024
Dynamic
response,
fatigue,
and
stability
issues
of
a
structure
are
closely
related
to
flow
behavior
past
bluff
body
structure.
Flow
the
free-end
rectangular
prism
is
investigated
numerically
using
Large
Eddy
Simulation
(LES)
turbulence
model
at
Re
=
22000.
The
has
constant
depth
(D)
width
(H)
ratio
D/H
0.5
for
span
length
variation
L
(=
10;
7,5;
5,0
2,5H).
Effects
free
end
on
characteristics
showed
that
pattern,
velocity
vector,
fluid
forces
component
changed.
presence
closed
alteration
in
wake,
which
presented
graphically
this
paper.
This
study
suggests
critical
aspect
slender
2,5<L/H<5,0
with
2,5H
an
unusual
among
test
models.
dynamic
response
affects
pattern
indicated
by
region
intensity
vorticity,
hydrodynamic
force
components,
other
local
components.
In
this
paper,
the
hydrodynamic
characteristics
of
a
hyperbolic
cylinder
under
periodic
pulsating
flow
are
studied.
The
non-uniform
turbulent
is
formed
by
periodically
oscillating
wing
structure
placed
upstream
cylinder.
influence
different
oscillation
velocities
and
amplitudes
horizontal
distance
between
on
downstream
studied,
results
indicate
that
mainly
determined
leading-edge
vortices
trailing-edge
vortex
shedding
itself.
Further,
has
an
obvious
owing
to
difference
in
diffusion
range
vortex.
Also,
lead
attachment
cylinder,
which
indicates
positive
or
negative
drag
coefficient.
Moreover,
critical
value
amplitude
exists
for
each
velocity
value,
so
subjected
minimum
force
incoming
flow.
