Materials,
Journal Year:
2024,
Volume and Issue:
17(19), P. 4919 - 4919
Published: Oct. 8, 2024
In
this
work,
we
attempt
to
explain
the
phenomenon
of
sulfur
corrosion
power
boiler
water
walls
under
conditions
large
fluctuations
in
carbon
monoxide
concentrations.
To
assess
required
for
formation,
a
criterion
based
on
chemical
and
flow
field
parameters
flue
gas
is
proposed.
The
formulated
mixture
fraction
variance
turbulence
time
scale.
Numerical
modeling
coal
combustion
250
MW
performed
using
ANSYS.
Two
cases
are
analyzed,
with
first
simulating
operated
classic
high-swirl
burners
second
one
accounting
operation
modified
low-swirl
burners.
Calculations
pulverized
standard
k-ε
model
described
by
fraction.
simulation
results
reveal
that
burner
characterized
higher
values
frequency
fluctuation
velocity
field,
which
strongly
related
an
increased
rate.
study
outcomes
show
validity
determine
areas
at
risk
corrosion.
Fire,
Journal Year:
2024,
Volume and Issue:
7(7), P. 237 - 237
Published: July 5, 2024
In
this
study,
a
novel
gas
burner
combining
air
swirl
and
an
inverse
diffusion
flame
(IDF)
is
designed
for
industrial
applications.
Numerical
simulations
using
the
Reynolds-averaged
Navier–Stokes
(RANS)
method
simplified
reaction
mechanisms
are
conducted
to
predict
turbulent
flow
combustion
performance
of
burner.
Detailed
structures,
structures
effects
configurations
examined.
The
simulation
results
indicate
that
action
creates
central
recirculation
zone
two
external
zones
at
head,
which
stabilize
combustion.
tangential
velocity
minimal
center
decreases
with
increasing
distance
from
outlet.
As
exit
increases,
maximum
gradually
decreases,
peak
value
shifts
towards
wall.
This
decrease
in
axial
signifies
gradual
dissipation
effect,
disappears
near
chamber
comparisons
reveal
altering
number
fuel
nozzles
more
effective
reducing
NO
emissions
than
changing
inclination
angle
nozzles,
given
conditions.
Favorable
conditions
achieved
when
there
16
nozzle
60°,
resulting
28.5%
reduction
outlet,
compared
reference
condition.
Materials,
Journal Year:
2024,
Volume and Issue:
17(19), P. 4919 - 4919
Published: Oct. 8, 2024
In
this
work,
we
attempt
to
explain
the
phenomenon
of
sulfur
corrosion
power
boiler
water
walls
under
conditions
large
fluctuations
in
carbon
monoxide
concentrations.
To
assess
required
for
formation,
a
criterion
based
on
chemical
and
flow
field
parameters
flue
gas
is
proposed.
The
formulated
mixture
fraction
variance
turbulence
time
scale.
Numerical
modeling
coal
combustion
250
MW
performed
using
ANSYS.
Two
cases
are
analyzed,
with
first
simulating
operated
classic
high-swirl
burners
second
one
accounting
operation
modified
low-swirl
burners.
Calculations
pulverized
standard
k-ε
model
described
by
fraction.
simulation
results
reveal
that
burner
characterized
higher
values
frequency
fluctuation
velocity
field,
which
strongly
related
an
increased
rate.
study
outcomes
show
validity
determine
areas
at
risk
corrosion.
