Physics of Fluids,
Год журнала:
2024,
Номер
36(10)
Опубликована: Окт. 1, 2024
The
evolution
of
tip
region
vortices
has
a
significant
influence
on
the
aerodynamic
performance
turbine.
Most
studies
squealer
optimization
focused
enhancing
blockage
effect
inside
clearance
but
had
limited
controlling
outside
clearance.
In
this
paper,
both
and
are
controlled
based
trailing
edge
suction
side
cutback
in
non-cooled
results
indicate
that
clearance,
scraping
vortex
plays
crucial
role
reducing
leakage.
enhances
strength
vortex,
thereby
expanding
effective
range.
While
leakage
breakdown
exacerbates
its
dissipation
effects,
leading
to
loss
downstream
blade.
injects
greater
fluid
momentum
into
increased
mixing
between
jet
mainstream.
Concurrently,
also
inhibits
breakdown,
resulting
notable
reduction
loss.
combined
impact
effectively
controls
total
It
been
demonstrated
there
exists
an
optimal
length
for
rim
at
edge,
which
can
be
determined
by
setting
opening
initiation
breakdown.
aforementioned
effects
cutbacks
prominently
observed
under
different
operating
conditions,
indicates
possess
good
applicability
certain
This
offers
valuable
guidance
control
optimization.
To
investigate
the
effect
of
inlet
elbow
geometry
on
performance
a
large
low-head
pumping
system
and
improve
its
comprehensive
performance,
this
paper
calculated
analyzed
internal
flow
fields,
external
characteristics,
entropy
production
distribution
with
different
parametric
combinations
via
numerical
simulations
Reynolds
averaged
Navier
Stokes-volume
fluids
fixed
net
head
method.
The
energy
characteristics
were
further
studied
using
newly
introduced
method
local
change
to
visualize
consumption.
An
automatic
multi-software
optimization
design
was
developed
based
MATLAB,
feed-forward
neural
network,
differential
evolution
algorithm
optimize
geometrical
parameters
elbow.
research
results
indicate
that
appropriate
heights
throat
truncated
cone
velocity
distribution,
decrease
hydraulic
loss
in
conduit,
foster
favorable
condition
at
pump
outlet.
Well-distributed
axial
impeller
improves
efficiency.
circulation
outlet
could
reduce
eliminate
separation,
reflow,
vortices
thereby
reducing
Compared
original
design,
optimized
significantly
efficiency
by
8.4
percentage
points.
findings
reveal
systems
provide
an
easy,
efficient,
economical
for
modification
systems.
Engineering Optimization,
Год журнала:
2024,
Номер
56(12), С. 1950 - 1971
Опубликована: Янв. 4, 2024
This
work
presents
the
multi-objective
optimization
(MOO)
of
dynamic
performance
a
suspended
monorail
vehicle
(SMV)
moving
on
curved
bridge,
based
an
effective
surrogate
model.
First,
vehicle-bridge
interaction
features
are
analysed
through
Then,
MOO
method
is
developed
In
this
method,
accuracy
and
stability
radial
basis
function
enhanced
by
proposing
innovative
improvement
strategy
adopting
particle
swarm
algorithm.
The
proposed
validated
few
numerical
tests.
Based
verification,
model
between
key
parameters
several
objectives
formulated,
solution
set
obtained
using
non-dominated
sorting
genetic
algorithm
II.
Finally,
effects
revealed
comparing
from
original
values
optimal
set.
A
non-uniform
inflow
caused
by
an
elbow
structure
is
one
of
the
main
reasons
for
low
energy
transformation
efficiency
a
centrifugal
pump.
Prototype
experiments
pump
are
used
to
analyze
rule
characteristics
under
uniform
and
inflow.
The
increases
hydraulic
losses
in
reduce
head
operation
efficiency.
decreases
8%
design
flow
condition.
large
eddy
simulation
with
shear-modified
viscosity
model
applied
simulating
excitation
development
features.
impact
loss
at
impeller
inlet
produces
unsteady
passage.
affects
pressure
fluctuation
frequency,
frequency
twice
blade-passing
(250
Hz).
high
entropy
production
regions
mainly
concentrated
suction
surface
blade
interface
volute,
coinciding
areas
asymmetrical
yield
distribution
intensified
because
increase
Machines,
Год журнала:
2022,
Номер
10(9), С. 774 - 774
Опубликована: Сен. 6, 2022
Pumping
viscous
fluids
using
centrifugal
pumps
in
the
subsea
industry
is
very
common.
The
pump
performance
degrades
drastically
when
viscosity
of
increases,
which
ultimately
gives
rise
to
installation
and
oil
production
cost.
Their
design
optimization
can
lead
a
significant
improvement
their
performance.
Therefore,
this
study
presented
effect
impeller
geometry
on
pumping
fluid
through
optimization.
Here,
operation
simulated
numerically
by
solving
Reynolds-averaged
Navier-Stokes
(RANS)
equations
at
different
flowrates.
Experimental
testing
also
performed
same
oils,
for
numerical
validation.
Artificial
neural-network-assisted
multiobjective
was
with
two
independent
parameters;
wrap
angle
splitter
blade
length
impeller,
head
input
power
as
objective
functions.
Wrap
length,
both
significantly
affect
while
oils;
increasing
decreasing
improve
significantly.
Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Micro
centrifugal
pumps
are
commonly
used
in
the
medical
field
for
transporting
drugs
or
blood,
etc.
Due
to
particularity
of
fluid
media,
irregular
flow
is
often
generated
inside
pump
resulting
over-high
pressure
pulsation
and
shear
stress,
which
will
eventually
cause
damage
medium.
In
this
paper,
internal
a
micro
was
investigated
through
both
visualization
experiments
numerical
simulations.
When
main
structure
parameters
impeller
were
selected
as
optimization
variables,
with
stress
objectives,
combination
simulation
solution
BP
neural
network
genetic
algorithm
employed
optimize
objectives
respectively.
The
results
indicate
that
model
have
high
accuracy
can
be
predict
performance
pumps.
After
optimization,
strength
coefficient
monitoring
point
near
volute
tongue
reduced
by
40%.
becomes
more
stable.
maximum
declined
42%
28%
volute.
research
great
significance
improve
stability
efficiency
Processes,
Год журнала:
2022,
Номер
10(7), С. 1254 - 1254
Опубликована: Июнь 23, 2022
The
non-uniform
inflow
caused
by
the
elbow
inlet
is
one
of
main
reasons
for
low
actual
operation
performance
a
centrifugal
pump.
Orthogonal
experiment
and
GA_PSO
algorithm
are
used
to
improve
head
efficiency
pump
with
an
based
on
method
combining
numerical
simulation
prototype
in
this
paper.
effects
design
parameters,
including
radius
ratio,
blade
angle,
number,
wrap
outlet
impeller
diameter,
width
flow
area
studied
orthogonal
experiment.
angle
major
factor
match
reduce
loss
contribute
enhancing
cavitation
characteristics.
particle
swarm
optimization
(PSO)
optimized
integrating
genetic
(GA),
which
ensures
that
PSO-calculation
result
avoids
falling
into
local
global
optimal
solution
obtained
as
quickly
possible.
optimally
designed
algorithm.
According
test
results,
4.7%
higher
than
original
