Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(10)
Published: Oct. 1, 2024
This
study
analyses
the
transient
friction
dynamics
behavior
of
water-lubricated
bearings
(WLBs)
with
a
textured
structure,
which
explains
mechanism
texture
structure
influencing
hydrodynamic
effect
WLB
in
physical
aspect.
A
comparison
experimental
and
numerical
data
is
carried
out
to
validate
proposed
mixed
lubrication
model
for
WLBs.
The
effects
type,
angle,
acceleration
mode,
time
on
nonlinear
properties
WLBs
are
investigated.
result
shows
that
various
structures
exhibit
distinct
pumping
optimal
performance
can
be
achieved
by
adopting
right
herringbone
an
acceptable
angle.
It
advisable
utilize
reverse
S-shaped
as
it
may
efficiently
mitigate
shock,
minimize
frictional
contact
at
initial
startup
stage,
control
rotor's
vibration
later
stages.
brief
shock
hampers
proper
lubrication,
consequently
affecting
stable
operation
study's
findings
offer
helpful
suggestions
enhanced
design
mitigation
wear
vibration.
Lubricants,
Journal Year:
2024,
Volume and Issue:
12(4), P. 107 - 107
Published: March 24, 2024
Contrary
to
conventional
journal
bearings,
which
operate
using
oil-based
substances,
water-lubricated
bearings
(WLBs)
utilize
water
and,
thus,
constitute
a
more
environmentally
responsible
solution.
The
shipping
industry,
among
others,
as
already
been
introduced
this
technology
with
lot
of
commercial
ships
stern
tube
systems;
in
other
cases,
hydropower
plants
manage
keep
up
the
strict
environmental
regulations
by
implementing
use
WLBs
turbines.
However,
there
are
challenges
when
it
comes
transitioning
from
water-based
ones.
Such
caused
low
viscosity
and
lead
phenomena
high
complexity.
related
but
not
limited
cavitation
turbulent
flow
due
interaction
between
lubricating
bearing
surface.
In
study,
numerical
method
will
be
used
simulate
fluid
film
geometries
order
perform
thermo-elastohydrodynamic
(TEHD)
analysis.
dynamic
characteristics
calculated
results
discussed.
novelty
study
is
evident
determination
elastic
deformation
WLB
during
operation,
well
effect
surface
roughness,
cavitation,
thermal
effects
on
characteristics.
Journal of Tribology,
Journal Year:
2025,
Volume and Issue:
147(8)
Published: Jan. 21, 2025
Abstract
The
numerical
solution
of
textured
journal
bearings
can
be
obtained
by
different
methods
such
as
progressive
mesh
densification
(PMD),
multigrid
(MG),
and
fixed
or
density
(FMD).
However,
the
computational
efficiencies
these
vary
greatly
while
solving
journal-bearing
problems.
In
present
study,
PMD,
MG,
FMD
are
compared,
varying
texture
bearing
parameters
portion,
dimple
area
density,
aspect
ratio,
dimensionless
clearance,
length,
From
this
it
is
observed
that
PMD
method
has
superior
efficiency
compared
to
MG
for
range
values
considered
in
analysis.
