The
cavitation
phenomenon
can
induce
non-uniformity
in
the
fluid,
impacting
fluid
dynamic
performance.
This
paper
focuses
on
shedding
of
Delft
Twist
11
hydrofoil.
First,
reliability
numerical
simulations
is
verified
by
computational
dynamics
results.
Utilizing
variational
mode
decomposition
method,
signals
two
paths
are
decomposed.
Finally,
pulsation
tracking
network
method
proposed
to
extensively
investigate
spatial
propagation
patterns
at
various
sections
above
twisted
results
reveal
that
typical
frequencies
different
monitoring
planes
30,
58,
and
88
Hz.
corresponding
amplitude
analysis
these
provides
insight
into
attenuation
process
vortices
shedding.
study
offers
a
novel
perspective
for
deeper
understanding
mechanisms.
Simultaneously,
this
references
enhancing
performance
mechanical
engineering
systems,
reducing
energy
consumption,
improving
structural
reliability.
Freestream
nuclei,
also
referred
to
as
water
quality,
are
known
significantly
affect
cavitation
inception.
However,
their
effects
on
fully
developed
and
the
corresponding
noise
characteristics
remain
inadequately
understood.
In
this
study,
a
multiscale
hydroacoustic
model
based
Euler–Lagrangian
framework
is
used
investigate
impact
of
quality
monopole
sheet
tip-leakage
vortex
(TLV)
cavitating
flow.
Cavitating
flows
over
National
Advisory
Committee
for
Aeronautics
0009
hydrofoil
under
varying
qualities
simulated,
results
compared
with
those
from
conventional
Eulerian
experimental
observations.
The
findings
indicate
that
sound
pressure
radiated
by
exhibits
same
baseline
signature
across
different
qualities,
but
more
intense
peaks
observed
in
nuclei-depleted
For
TLV
cavitation,
higher
acoustic
predicted
“weak”
water,
while
lower
extreme
loud
events
“strong”
consistent
cavity
evolution
shows
strong
pulses
generated
result
collapse
rebound
cavity.
Additionally,
smaller
arises
absence
tip-separation
intermittency
stronger
pulse
originates
complete
cavity,
phenomenon
not
weak
water.
both
types,
frequency-domain
analysis
reveals
amplified
high-frequency
range
degassed,
likely
linked
dynamic
behavior
local
cavities.
The
cavitation
phenomenon
can
induce
non-uniformity
in
the
fluid,
impacting
fluid
dynamic
performance.
This
paper
focuses
on
shedding
of
Delft
Twist
11
hydrofoil.
First,
reliability
numerical
simulations
is
verified
by
computational
dynamics
results.
Utilizing
variational
mode
decomposition
method,
signals
two
paths
are
decomposed.
Finally,
pulsation
tracking
network
method
proposed
to
extensively
investigate
spatial
propagation
patterns
at
various
sections
above
twisted
results
reveal
that
typical
frequencies
different
monitoring
planes
30,
58,
and
88
Hz.
corresponding
amplitude
analysis
these
provides
insight
into
attenuation
process
vortices
shedding.
study
offers
a
novel
perspective
for
deeper
understanding
mechanisms.
Simultaneously,
this
references
enhancing
performance
mechanical
engineering
systems,
reducing
energy
consumption,
improving
structural
reliability.
