Research on Flow Field Characteristics of a Three-Plate Vertical Rotary Gate
Water,
Год журнала:
2025,
Номер
17(3), С. 456 - 456
Опубликована: Фев. 6, 2025
Steady-state
and
transient
hydraulic
characteristics
of
a
novel
three-plate
vertical
rotary
gate
were
analysed
through
physical
model
experiments
numerical
simulations.
An
experimental
system
was
built
to
analyse
the
flow
gate,
steady-state
prediction
proposed.
simulations
conducted
field
distribution
characteristics.
A
established
during
opening
closing.
The
discharge
coefficient
evolution
law
under
different
speed
conditions
revealed.
Under
various
water
levels,
similar.
Within
0–90°
opening,
grew
exponentially.
for
revealed
error
<7%.
increased
with
decreasing
speed;
when
closed,
it
exhibited
asymmetric
variation
hysteresis
effect
more
evident
at
higher
speeds.
Plate
2
experienced
maximum
force.
In
state,
force
acting
on
plates
periodic
fluctuation
pattern,
speed.
reference
design
application
fast
closing
gates
is
provided.
Язык: Английский
Characterization of free-surface vortex evolution and its impact on hydraulic stability of the pump sump
Experimental Thermal and Fluid Science,
Год журнала:
2025,
Номер
166, С. 111466 - 111466
Опубликована: Март 5, 2025
Язык: Английский
Vortex identification based on the Liutex method and its effect on fish passage upstream
Journal of Hydrodynamics,
Год журнала:
2024,
Номер
36(1), С. 130 - 141
Опубликована: Фев. 1, 2024
Язык: Английский
An experimental study of vortex evolution around an offshore stationary dual-chamber oscillating water column converter
Ocean Engineering,
Год журнала:
2024,
Номер
312, С. 119052 - 119052
Опубликована: Авг. 27, 2024
Язык: Английский
Application of Vortex Identification Methods in Vertical Slit Fishways
Water,
Год журнала:
2023,
Номер
15(11), С. 2053 - 2053
Опубликована: Май 29, 2023
The
reproduction
and
survival
of
fish
are
often
negatively
affected
by
the
construction
dams
other
hydroelectric
projects,
which
cut
off
their
migratory
routes.
Building
effective
passage
facilities
that
allow
to
pass
through
smoothly
alleviates
negative
impact
projects
on
ecological
environment,
thus
protecting
diversity
aquatic
species
preventing
extinction
indigenous
fish.
Vertical
slit
fishways
highly
effective,
but
turbulence
inside
fishway
pools
directly
affects
passage.
In
this
study,
large-eddy
simulation
framework
is
used
capture
vortex
characteristics
in
interior
vertical
pools,
volume
fluid
method
applied
simulate
free
surface.
independence
grid
assessed
quality
index,
results
compared
with
experimental
acoustic
Doppler
velocimetry
data.
This
work
characterizes
flow
field
using
Q-criterion,
Omega
method,
Liutex
identification
method.
show
structure
pool
has
obvious
three-dimensional
varies
within
different
chambers.
analysis
comparison
three
methods
captured
more
consistent
actual
motion
pattern
water
flow.
Язык: Английский
Turbulent structural analysis of the combined fishway with vertical seam and bottom hole
River Research and Applications,
Год журнала:
2024,
Номер
40(3), С. 425 - 435
Опубликована: Янв. 29, 2024
Abstract
The
three‐dimensional
flow
velocities
within
the
typical
pool
chamber
of
rectangular
fishway
were
measured
in
a
vertical
slit
bottom‐hole
combination
by
hydraulic
model
test
using
an
acoustic
Doppler
velocimeter
(ADV).
This
was
aimed
to
analyze
effect
eddy
structures
on
fish
migration.
Based
this,
numerical
simulation
study
conducted
Reynolds
mean
(RNG
k‐ε
)
and
large
(LES).
Additionally,
omega
(
Ω
identification
method
used
identify
structure
dissect
characteristics
water
body
chamber.
findings
revealed
that
longitudinal
velocity
dominated
lower
bottom
layer
pond.
Moreover,
middle
upper
layers
more
turbulent
there
is
phenomenon
backflow
upstream,
at
orifice
divergent
jet
with
main
slightly
right
bank,
forming
two
vortices
opposite
directions
both
sides
orifice.
passage
mainly
displayed
vortex
structure,
which
can
effectively
slow
down
provide
resting
place
for
migratory
fish.
accurately
inside
field.
Язык: Английский
Effect of swirler spin on flame shape and combustion dynamics
Proceedings of the Combustion Institute,
Год журнала:
2024,
Номер
40(1-4), С. 105663 - 105663
Опубликована: Янв. 1, 2024
Язык: Английский
A Method for Real-Time Measurement of the Vertical Vortex at Flood Discharge Outlets Using Ultrasonic Sensors
Sensors,
Год журнала:
2024,
Номер
24(17), С. 5583 - 5583
Опубликована: Авг. 28, 2024
In
this
study,
ultrasonic
sensors
were
used
to
measure
the
vertical
vortex
at
flood
discharge
outlets
in
real
time,
and
numerical
simulations
model
experiments
conducted.
When
a
sound
signal
passes
through
vortex,
its
propagation
characteristics
will
change,
which
helps
determine
existence
of
vortex.
Moreover,
characteristic
parameters
can
be
obtained
inversion.
paper,
first,
theories
acoustic
measurement
methods
introduced
their
feasibility
was
verified
comparison
between
Particle
Image
Velocimetry
(PIV)
simulation
results.
Then,
Computational
Fluid
Dynamics
(CFD)
method
simulate
hydraulic
structures
data
restored
actual
size
scale.
Finally,
conducted,
velocity
simplified
under
laboratory
conditions.
The
research
results
indicate
that
proposed
article
is
effective
with
core
radius
0.03~0.05
m
maximum
tangential
0.5
m/s,
error
within
10%.
Язык: Английский
Entropy production by dissipation effects and characteristic vortex evolution in a rocket turbopump
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Июнь 22, 2023
Abstract
The
relationship
between
entropy
production
and
vortex
evolution
involves
the
efficiency
stability
of
rotating
machinery.
This
study
investigates
energy
characteristics
a
rocket
turbopump,
revealing
correlated
mechanisms
rate
using
dissipation
effects
characteristic
evolution.
Direct
turbulent
dissipations
rigid
shear
vorticity
decomposition
methods
are
utilized
to
analyze
correlation
analysis
flow
loss
vorticities
in
machinery
for
first
time.
With
an
increase
rate,
hydraulic
wall
decrease
by
60%
38.3%,
proportions
input
(from
13%
8%)
remain
stable
(8%),
respectively.
local
direct
(EPDD)
inducer-impeller
is
strongly
related
entropy,
effect
total
enstrophy
on
EPDD
weaker
than
that
vorticity,
indicating
suppresses
dissipation.
significantly
static
passage
turbopump
owing
weak
rotational
effect.
(EPTD)
gradually
increases
with
increasing
reaching
medium
(the
maximal
degree
turbopump)
exhibiting
rotation
loss.
Moreover,
affects
(except
diffuser)
two
reach
maximum
at
designed
optimal
minimum
Язык: Английский
Vortex identification based on the Liutex method and its effect on fish passage upstream
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Авг. 2, 2023
Abstract
Fishway
research
is
important
for
mitigating
the
fragmentation
of
river
habitats
caused
by
hydraulic
projects.
The
vertical
slit
fishway
a
broadly
used
type
because
its
high
efficiency
and
adaptability
to
water
levels.
However,
resulting
vortex
current
disrupts
fish
passage
hence
directly
affecting
migration.
This
study
aims
accurately
capture
structure
in
analyze
effect
elements
(vortex
structure,
intensity,
etc.)
on
fish.
We
conducted
an
analysis
three-dimensional
flow
field
through
utilization
experimental
model
Large
Eddy
Simulation
(LES)
method
dynamic
stress.
Moreover,
we
captured
information
at
different
rates
using
Liutex
identification
investigated
results
revealed
that
structures
inside
pool
occupy
most
room;
however,
areas
with
higher
strength
were
primarily
located
near
seam
mainstream;
gradually
increases
increasing
flow,
suppressing
Fish
experienced
significantly
increased
resistance
when
encountering
strong
vortexes.
suggests
may
act
as
physical
barrier
These
findings
highlight
potential
negative
effects
movement
reiterate
importance
understanding
dynamics
aquatic
environmental
management.
As
effective
tool
identifying
vortexes
fluid
demonstrates
features
within
fishway,
thereby
providing
insights
into
interaction
between
organisms.
Язык: Английский