Effect of interface control on pressurization deterioration and gas-phase distribution characteristics of a multistage mixed flow nuclear main pump
Progress in Nuclear Energy,
Год журнала:
2025,
Номер
185, С. 105783 - 105783
Опубликована: Апрель 10, 2025
Язык: Английский
Experimental Investigation of the Impact of Blade Number on Energy Performance and Pressure Fluctuation in a High-Speed Coolant Pump for Electric Vehicles
Energy,
Год журнала:
2024,
Номер
unknown, С. 133925 - 133925
Опубликована: Ноя. 1, 2024
Язык: Английский
Transient instability characteristics of fluid film bearings induced by bubble inclusion
Physics of Fluids,
Год журнала:
2024,
Номер
36(6)
Опубликована: Июнь 1, 2024
Bubble
inclusion
in
the
tribo-pair
leads
to
two-phase
fluid
lubrication.
Upon
initial
introduction
of
air
bubbles
tribo-pair,
it
can
lead
instability
operational
state.
A
numerical
model
is
formulated
by
coupling
Reynolds
equation,
bubble
dynamics
and
rotor
equation.
Various
parameters,
such
as
hydrodynamic
pressure,
carrying
capacity,
trajectory,
equilibrium
position,
are
employed
characterize
impact
interface
parameters
on
entrainment
process.
The
findings
reveal
that
pressure
plays
a
crucial
role
establishing
correlation
between
velocity
fluctuations
kinetic
parameters.
Surface
tension
predominantly
influences
within
dispersion
region,
while
surface
dilatational
viscosity
affects
entire
domain.
Lower
or
neglecting
trigger
larger
trajectory.
Changes
liquid-phase
result
behavior
influenced
position
effect
pressure.
Higher
gas-phase
volume
fractions
more
pronounced
reduction
fluid-carrying
capacity
increased
system
instability.
Язык: Английский
Numerical simulation and mechanistic model study of gas pocket distribution characteristics in a centrifugal impeller
Physics of Fluids,
Год журнала:
2024,
Номер
36(11)
Опубликована: Ноя. 1, 2024
The
formation
and
extension
of
the
gas
pocket
in
impeller
can
lead
to
rapid
deterioration
or
even
failure
centrifugal
pump's
two-phase
pressurization.
It
is
difficult
directly
measure
characteristic
parameters
high-speed
rotating
impeller,
such
as
void
fraction,
by
experimental
methods.
In
this
paper,
performance
pump
studied
numerical
simulation
validated
experiment.
positive
pressure
gradient
at
end
blade
surface
main
reason
why
boost
high
inlet
volume
fraction
(IGVF).
As
IGVF
increases,
both
length
thickness
gradually
increase.
head
coefficient
has
an
approximately
quadratic
relationship
with
impeller.
mechanism
model
flow
established
force
analysis
its
downstream
single
bubble
channel.
effectively
predict
position
simulation.
Язык: Английский