Journal of Physics Conference Series,
Journal Year:
2024,
Volume and Issue:
2752(1), P. 012058 - 012058
Published: June 1, 2024
Abstract
Hydraulic
loss
and
vortex
analysis
are
two
most
widely-used
methods
investigating
flow
characteristics
from
macroscopic
view
microscopic
respectively
although
the
correlation
between
these
still
not
fully
clarified.
Based
on
kinetic
energy
equation
Boussinesq
hypothesis,
hydraulic
is
resulted
joint
work
of
dissipation
transportation
in
domain
while
vorticity
can
be
further
divided
into
local
rigid
rotational
part
deformational
with
help
newly
proposed
concept
Liutex.
Thereafter,
enstrophy
as
well
transport
intensity
selected
count
through
dimensional
analysis.
Finally,
spatial
evolution
small
guide
vane
opening
at
turbine
mode
analyzed
SST
k–ω
model
temporal
runaway
point
DES
model.
For
correlation,
mainly
caused
by
Ω
S
T
R
,
respectively.
order
nearly
remains
unchanged
degree
decreases
to
some
extent.
our
work,
different
structure
quantified
compared.
Engineering Applications of Computational Fluid Mechanics,
Journal Year:
2021,
Volume and Issue:
15(1), P. 1613 - 1628
Published: Jan. 1, 2021
The
dominant
vortex
structure
near
the
hub
in
rotor
corner
separation
flow
has
an
important
influence
on
internal
of
axial
rotating
machinery.
However,
current
quantitative
research
key
vortical
characteristics
is
still
insufficient.
analysis
(horn-like
vortex)
pump
was
conducted
and
found
that
average
intensity
turbulence
eddy
dissipation
show
a
gradual
weakening
trend
along
core
line
from
region
to
tail
under
various
working
conditions.
evolution
horn-like
life
cycle
includes
five
stages,
inception-growth-development-attachment-decay
typical
condition
0.62Q0.
statistical
frequency
periodic
about
2.76
times
shaft
rotation
frequency.
pressure
fluctuation
induced
by
increases
rapidly
dominates
channel.
peak-peak
value
impeller
outlet
section
close
2.79
inlet
should
be
paid
enough
attention
to.
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(2)
Published: Feb. 1, 2025
Centrifugal
pumps
play
a
vital
role
in
industrial
production,
particularly
for
the
transportation
of
viscous
liquids,
where
they
often
incur
significant
energy
losses.
This
study
investigates
loss
mechanisms
centrifugal
pump
impellers,
focusing
on
dynamics
vortices
under
varying
viscosities
and
rotational
speeds
through
numerical
simulation.
The
proportion
distribution
entropy
production
different
are
discussed,
influence
terms
vorticity
transport
equation
changes
is
analyzed.
results
show
that
turbulent
dissipation
main
at
low
viscosities.
As
viscosity
increases,
wall
rises
becomes
source
pump.
Under
high
rotating
speed
condition,
Coriolis
force
term
reason
changes.
decreases
sharply,
relative
vortex
stretching
also
decreases.
Meanwhile,
diffusion
increases
reduction
unstable
flow
impeller
high-viscosity
fluid
media.
combines
with
analysis
to
analyze
conversion
process
generation
mechanism
pump,
deeply
explore
relationship
between
field
impeller.
It
has
theoretical
practical
significance
improving
efficiency
transporting
fluids
providing
support
related
designs.
