Cavitation-induced variations in vortex structure and energy conversion dynamics in a vortex pump
Energy,
Год журнала:
2025,
Номер
317, С. 134478 - 134478
Опубликована: Янв. 27, 2025
Язык: Английский
Interaction between horseshoe vortex structure and sediment transport around a river rectangular pier using a solid-liquid two-phase turbulent LES model
International Journal of Multiphase Flow,
Год журнала:
2025,
Номер
unknown, С. 105153 - 105153
Опубликована: Янв. 1, 2025
Язык: Английский
Scale effects of the tip-leakage flow with and without cavitation: A numerical study in OpenFOAM
International Journal of Multiphase Flow,
Год журнала:
2024,
Номер
unknown, С. 105108 - 105108
Опубликована: Дек. 1, 2024
Язык: Английский
Euler-Lagrange study on the bubble wake of a ship with waterjet propulsion
Ocean Engineering,
Год журнала:
2024,
Номер
318, С. 120173 - 120173
Опубликована: Дек. 24, 2024
Язык: Английский
Comparative Performance Assessment between Incompressible and Compressible Solvers to Simulate a Cavitating Wake
Fluids,
Год журнала:
2024,
Номер
9(9), С. 218 - 218
Опубликована: Сен. 18, 2024
To
study
the
effects
of
fluid
compressibility
on
dynamics
a
cavitating
vortex
street
flow
in
regime
where
shedding
frequency
increases
as
result
cavitation
increase,
wake
behind
wedge
was
simulated
employing
both
incompressible
and
compressible
solvers.
do
this,
model
implemented,
modifying
Zwart-Gerber-Belamri
(ZGB)
solver
including
pressure
limit
absorbing
boundary
conditions
to
prevent
non-physical
field.
validate
performance
model,
preliminary
simulations
were
carried
out
1D
Sod
tube
circular
body
at
laminar
conditions.
The
results
with
solvers
showed
similar
predictions
terms
pressure,
frequency,
instantaneous
average
vapor
volume
fraction
profiles.
In
spite
differences
obtained
energy
content
force
fluctuations
higher
frequencies,
which
appear
be
better
resolved
amplified
when
is
considered.
Overall,
provided
comparable
phenomena
that
are
well
aligned
experimental
observations.
Язык: Английский
Mechanism of multiscale cavitation induced pressure pulses on a propeller
Physical Review Fluids,
Год журнала:
2024,
Номер
9(11)
Опубликована: Ноя. 19, 2024
This
study
explores
the
evolution
characteristics
of
pressure
pulses
caused
by
cavitating
flow
around
a
highly-skewed
propeller.
The
fluctuation
law
low-frequency
propeller
is
mainly
determined
rotational
motion
propeller,
which
less
affected
cavitation.
occurrence,
rupture,
shedding,
and
collapse
vapor
cavity
will
promote
significant
increase
in
medium
high
frequency
pressure.
Most
notably,
fragmentation
shedding
small-scale
cavities
can
cause
peaks
mid-frequency
region.
Meanwhile,
microbubbles
lead
to
fluctuating
at
decreased
rate
6
dB
per
octave.
Язык: Английский
Numerical investigation of tip vortex cavitation noise with an emphasis on environmental nucleation effect
Physics of Fluids,
Год журнала:
2024,
Номер
36(12)
Опубликована: Дек. 1, 2024
The
multiscale
interactions
between
macroscale
cavities
and
microscale
nuclei
influence
the
tip
vortex
cavitation
(TVC)
dynamics
its
induced
noise.
To
study
underlying
mechanisms,
we
employ
a
two-way
transition
coupling
Euler–Lagrange
model.
Through
acoustic
analogy
analysis,
identify
cavity
volume
fluctuations
as
main
vocal
mechanism
of
cavitating
vortex,
highlighting
two
critical
dynamics,
i.e.,
breathing
mode
surface
waves
collapse
downstream
end.
Multiscale
simulation
results
suggest
that
merging
bubbles
into
can
generate
more
continuous
enlarge
size.
In
addition,
high-frequency
noise
is
significantly
increased
due
to
injection,
reduced
cavity.
Our
investigation
provides
foundation
for
understanding
TVC
Язык: Английский