AIP Advances,
Journal Year:
2020,
Volume and Issue:
10(1)
Published: Jan. 1, 2020
Self-priming
pumps
are
widely
used
for
irrigation,
water
treatments,
and
industrial
areas
due
to
the
self-priming
capacity.
As
we
know,
gas-liquid
flow
pattern
during
process
is
very
complex
still
not
fully
understood.
In
this
study,
a
visualization
test
was
performed
reveal
two-phase
patterns
in
transparent
pump
by
using
high-speed
photography.
The
dynamic
change
of
column
inlet-pipe
outlet-pipe
recorded
digital
camera,
internal
states
were
camera
under
different
positions
frame
rates.
First,
transient
revealed.
initial
stage,
large
amount
gas
sucked
into
impeller
level
rose
fast
inlet
pipe
then
kept
steady.
With
increase
volume
impeller,
plenty
bubbles
generated
rapidly
because
mixing
liquid
inside
impeller.
Some
small
transported
separation
chamber
centrifugal
force,
while
rest
circulated
together
with
addition,
light
discharged
outlet
heavy
reserved
effect
gravity
force.
Afterwards,
part
flowed
back
through
reflux
hole.
Second,
evolution
bubble
formation
captured.
Many
appeared
as
pocket
crushed
blade
surface
or
jet
flow.
general,
capacity
determined
rate
liquid,
transporting
mixture
from
volute
chamber,
separating
liquid.
Physics of Fluids,
Journal Year:
2023,
Volume and Issue:
35(5)
Published: May 1, 2023
As
key
devices
to
lift
deep-sea
oil
and
gas,
mixed-flow
pumps
can
transport
multiphase
flow
with
high
inlet
gas
volume
fraction
(IGVF).
Performance
parameters
of
may
be
disturbed
by
the
complex
gas–liquid
distribution
under
various
conditions
that
need
an
accurate
two-phase
numerical
methodology
for
prediction.
In
this
work,
mixed
performance
a
pump
is
investigated
based
on
modified
drag
force
model,
which
considers
bubble
deformation
at
IGVF.
The
effects
IGVF
pressure
increment
phase
are
explored.
influences
rate
rotational
speed
studied
as
well.
Experiments
conducted
obtain
images.
results
show
predicted
in
simulations
consistent
those
obtained
experiments.
decreased
increase.
Especially
when
increases
from
5%
15%,
drops
sharply,
surging
phenomenon.
increased
improve
performance.
evolution
deeply
analyzed
understanding
characteristics
pumps.
Journal of Fluids Engineering,
Journal Year:
2023,
Volume and Issue:
146(5)
Published: Dec. 1, 2023
Abstract
The
performance
degradation
of
electrical
submersible
pump
(ESP)
caused
by
high
gas
volume
fraction
(GVF)
has
always
been
a
common
problem
in
the
field
oil
and
production.
Experiments
are
conducted
to
investigate
gas–liquid
performances
pressurization,
power,
efficiency
15-stage
mixed-flow
ESP
self-designed
manufactured.
A
calculation
method
useful
power
is
proposed
based
on
hypothesis
isothermal
compression,
with
relative
error
calculated
results
within
±2%
between
compression
polytropic
compression.
rapid
decrease
found
be
main
reason
for
hydraulic
as
pump-inlet
(IGVF)
increases.
Moreover,
interstage
pressurization
deterioration
gradually
weakens
along
increasing
direction
stage
number.
proposed,
each
booster
follow
same
distribution
variation
fraction.
Increasing
number
can
efficiently
improve
critical
deterioration,
well
boundary
maximum
value
average
single-stage
pressurization.
prediction
correlations
operating
conditions
highest
established,
respectively,
condition
range
high-efficiency
discovered.
Deleted Journal,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: Dec. 24, 2024
Helical
axial-flow
multiphase
pumps
are
core
devices
for
developing
deep-sea
oil
and
gas,
but
the
complex
two-phase
flow
inside
such
affects
their
transport
stability.
As
reported
here,
enhanced
characteristics,
splitter
blades
were
added
at
noncoincidence
area
of
impeller
tail
by
using
a
multi-objective
optimization
method,
impact
on
pump
performance
was
explored
in
comparison
with
original
model.
The
results
indicate
that
Gaussian
process
regression
combined
particle
swarm
accurately
predicts
external
characteristics.
Under
an
inlet
gas
volume
fraction
30%,
optimized
model
increases
head
coefficient
22.2%
without
reducing
efficiency.
Although
enhance
tail,
they
intensify
gas-phase
accumulation
tail.
promotes
more-uniform
channels,
axial
velocity
uniformity
phase
liquid
improving
15.1%
9.5%
average
angle
increasing
12.3°
8.3°
under
30%.
Energies,
Journal Year:
2020,
Volume and Issue:
13(4), P. 908 - 908
Published: Feb. 18, 2020
This
work
aimed
to
study
the
bubble
distribution
in
a
multiphase
pump.
A
Euler-Euler
inhomogeneous
two-phase
flow
model
coupled
with
discrete
particle
population
balance
(PBM)
was
used
simulate
whole
channel
of
three-stage
gas-liquid
centrifugal
Comparison
computational
fluid
dynamic
(CFD)
simulation
results
experimental
data
shows
that
can
accurately
predict
performance
pump
under
various
operating
conditions.
In
addition,
liquid
phase
velocity
distribution,
gas-phase
and
pressure
second
stage
impeller
at
0.5
span
blade
height
three
typical
working
conditions
were
compared.
Results
show
region
high
local
gas
volume
fraction
(LGVF)
mainly
appears
on
suction
surface
(SS)
blade.
With
increase
inlet
(IGVF),
vortices
low
recirculation
regions
are
generated
outlet
SS
blade,
area
LGVF
increases,
gas–liquid
separation
occurs
The
flows
out
along
limited
pressurization
happens
outlet.
average
size
is
smallest
while
largest.
Under
IGVF
conditions,
bubbles
tend
break
into
smaller
ones,
broken
concentrate
(PS)
Bubbles
coalesce
larger
ones
IGVF,
aggregation
zone
diffuses
from
PS.
