A comprehensive analysis of a numerical self-propulsion procedure for high-speed marine vehicles
Ocean Engineering,
Год журнала:
2023,
Номер
287, С. 115766 - 115766
Опубликована: Сен. 11, 2023
In
the
context
of
numerical
self-propulsion
predictions,
literature
on
high-speed
marine
vehicles
(HSMV)
is
still
relatively
scarce.
Actually,
extensive
analyses
are
rarely
considered
for
these
applications
because
not-so-stringent
design
constraints
and
contract
requirements
concerning
crafts
also
thanks
to
advantages
series
production.
On
contrary,
with
growth
market
requests,
in
particular,
direction
Greenhouse
Gas
Reduction,
exact
knowledge
vessel
working
point,
terms
speed
engine
configuration,
pushes
researchers
investigate
all
factors
which
deeply
define
propulsion
condition.
present
paper,
two
existing
vessels
have
been
numerically
studied
using
a
robust
industrially
affordable
procedure
based
some
simplified
viscous
Computational
Fluid
Dynamic
approaches
predict
points.
The
obtained
results
then
compared
available
sea
trials
showing
very
high
agreement
even
if
uncertainties
both
experimental
measurements
CFD
exist.
impact
has
further
investigated
assess
reliability
prediction,
that
maximum
can
be
an
uncertainty
about
1
knot
10%
corresponding
load.
A
more
prediction
by
including
assessment
analyses.
validity
proposed
supported
falls
inside
from
full-scale
measurements,
so
defining
point
purposes.
Язык: Английский
Simulation and analysis of ship rudder blade force based on finite element method
Опубликована: Апрель 1, 2024
To
analyze
the
force
situation
of
ship
rudder
blades
in
water,
a
simulation
model
certain
blade
was
established
using
software,
and
boundary
conditions
were
set
calculated.
The
results
show
that
fluid
velocity,
pressure,
stress
distribution
around
vary
under
different
operating
angles.
On
upstream
side
blade,
velocity
is
small
pressure
high,
while
on
downstream
side,
moderate.
lowest
point
about
7.6m
forward
along
arc
length
from
tail.
When
steering
angle
greater
than
15°,
drops
to
negative
pressure.
Therefore,
it
necessary
minimize
as
much
possible.
Further
analysis
reveals
maximum
occurs
at
junction
support
seat
shaft,
increases,
shows
trend
first
increasing
then
decreasing.
Язык: Английский