Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 7, 2024
Abstract
Wingsails
as
a
classical
means
for
wind-assisted
ship
propulsion
is
booming
today.
Crescent-shaped
wingsails
have
shown
great
potential
considering
their
aerodynamics
in
thrust
generation.
However,
there
been
few
studies
on
its
structural
responses
exposed
to
unsteady
aerodynamic
loads.
In
this
study,
crescent-shaped
wingsail
at
\(1:100\)
scale
investigated
by
using
wind
tunnel
tests.
The
with
aspect
ratios
of
\(0.19\)
and
\(0.33\),
which
are
derived
from
practical
design,
measured
the
angle
attack
(\(\alpha\))
\(0^\circ\)
\(90^\circ\),
speed
\(20
m/s\)
\(40
m/s\).
loads,
pressure
distribution,
tip
displacements
discussed.
A
study
Reynolds
number
sensitivity
indicates
that
trends
force
coefficients
critical
\(\alpha\)
changed
when
(\(Re\))
above
\(3.1\times
{10}^{5}\).
Besides,
\(Re=3.1\times
{10}^{5}\)
lift
crisis
found
below
\(10^\circ\),
drag
happens
\(\alpha
=0^\circ\)
\(Re=3.6\times
Structural
response
analysis
conducted
based
displacement
direction
perpendicular
chord
line.
fundamental
eigenfrequency
structure,
instead
flow-induced
frequencies,
dominate
fluid-structure
interaction
Furthermore,
performance
three-wingsail
system
analyzed
experiments.
Notable
interactions
among
three
wingsails.
