Utilization of hydrogen-diesel blends for the improvements of a dual-fuel engine based on the improved Taguchi methodology
Energy,
Год журнала:
2024,
Номер
292, С. 130474 - 130474
Опубликована: Янв. 27, 2024
Язык: Английский
A Comprehensive Understanding of Thermal Barrier Coatings (TBCs): Applications, Materials, Coating Design and Failure Mechanisms
Metals,
Год журнала:
2024,
Номер
14(5), С. 575 - 575
Опубликована: Май 13, 2024
This
review
offers
a
comprehensive
analysis
of
thermal
barrier
coatings
(TBCs)
applied
to
metallic
materials.
By
reviewing
the
recent
literature,
this
paper
reports
on
collection
technical
information,
involving
structure
and
role
TBCs,
various
materials
coating
processes,
as
well
mechanisms
involved
in
durability
failure
TBCs.
Although
TBCs
have
been
successfully
utilized
advanced
applications
for
nearly
five
decades,
they
continue
be
subject
keen
interest
ongoing
study
world
science,
with
overviews
field’s
evolution
remaining
ever
relevant.
Thus,
outlines
current
requirements
main
application
areas
(aerospace,
power
generation
automotive
naval
industries)
properties
resistance
thermal,
mechanical
chemical
stress
different
types
used,
such
zirconates,
niobates,
tantalates
or
mullite.
Additionally,
approaches
high-entropy
multilayer
coatings,
are
presented
discussed.
analyzing
processes
issues
related
delamination,
spallation,
erosion
oxidation
revealed.
Integrating
latest
generations
superalloys,
examining
heat
transfer
mechanisms,
could
represent
key
in-depth
study.
Язык: Английский
A study on the effect of spark plug micro-hole hydrogen injection on the spray and combustion processes of a gasoline engine with intake port water injection
Energy,
Год журнала:
2025,
Номер
315, С. 134366 - 134366
Опубликована: Янв. 1, 2025
Язык: Английский
Computational Investigation of the Influence of Combustion Chamber Characteristics on a Heavy-Duty Ammonia Diesel Dual Fuel Engine
Energies,
Год журнала:
2024,
Номер
17(5), С. 1231 - 1231
Опубликована: Март 4, 2024
In
response
to
increasingly
stringent
emissions
regulations
and
the
depletion
of
conventional
fuel
sources,
integrating
carbon-free
fuels
into
transport
sector
has
become
imperative.
While
hydrogen
(H2)
presents
significant
technical
challenges,
ammonia
(NH3)
could
present
a
better
alternative
offering
ease
transport,
storage,
distribution,
with
both
ecological
economic
advantages.
However,
substitution
leads
high
unburned
NH3,
particularly
at
loads.
Combustion
chamber
retrofitting
proven
be
an
effective
approach
remedy
this
problem.
order
overcome
problems
associated
difficult
combustion
in
engines,
study
aims
investigate
effect
piston
bowl
shape
ammonia/diesel
dual
engine
on
process.
The
primary
objective
is
determine
optimal
configuration
that
offers
superior
performance
under
load
conditions
rates.
study,
multi-objective
optimization
used
control
creation
geometries
swirl
rate
CONVERGETM
3.1
code.
To
maximize
indicated
thermal
efficiency
demonstrate
influence
enrichment
synergistic
incorporating
was
implemented.
Notably,
optimum
configuration,
featuring
85%
energy
contribution
from
ammonia,
outperforms
others
terms
pollutant
reduction.
It
achieves
over
43%
reduction
NH3
substantial
31%
improvement
efficiency.
Язык: Английский
Analysis of ammonia as a combustion inhibitor for combustion knock and power expansion in a DI hydrogen engine
Fuel,
Год журнала:
2024,
Номер
375, С. 132481 - 132481
Опубликована: Июль 26, 2024
Язык: Английский
Effect of direct water injection timing and quantity on combustion, performance, and emission characteristics of a homogeneous charge compression ignition engine − A CFD analysis
Applied Thermal Engineering,
Год журнала:
2024,
Номер
257, С. 124190 - 124190
Опубликована: Авг. 23, 2024
Язык: Английский
Toward improving efficiency and mitigating emissions in a natural gas/diesel direct injection dual fuel engine using EGR
International Journal of Engine Research,
Год журнала:
2024,
Номер
25(11), С. 1976 - 1990
Опубликована: Июль 23, 2024
As
emissions
regulations
become
more
and
stringent
conventional
fuel
sources
rarefaction,
new
alternatives
are
emerging
to
address
this
situation.
Dual
engines
among
the
promising
solutions,
offering
both
ecological
economic
advantages.
However,
these
often
confront
constraints
linked
high
levels
of
unburnt
hydrocarbons
(HC)
at
low
loads
NO
x
loads.
To
overcome
problems
guarantee
high-efficiency
overall
operating
loads,
exhaust
gas
recirculation
(EGR)
is
a
potential
solution.
In
present
experimental
study,
appropriate
modifications
have
been
carried
out
single-cylinder
diesel
engine
ensure
dual
operation
with
EGR.
Natural
used
as
primary
pilot
fuel,
respectively.
At
load
operations,
EGR
rate
increased
up
35%
until
reduction
hydrocarbons.
carefully
adjusted,
combustion
efficiency
easily
deteriorates
due
oxygen
amount
lack
in
chamber.
Also,
minimizing
prioritized
all
conditions
while
keeping
thermal
sight.
addition,
variation
studied
for
improving
combination
technique.
This
made
it
possible
determine
influence
load,
rate,
quantity
on
response
triple
challenges
reducing
HC
efficiency.
The
results
show
that
an
adequate
30%,
depending
conditions,
can
reduce
by
>25%
increasing
around
20%.
result
accompanied
significant
reduction,
over
90%,
emissions.
Язык: Английский
Characterization of pressure oscillations and combustion noise of hydrogen reactivity-controlled compression ignition (RCCI)
International Journal of Hydrogen Energy,
Год журнала:
2024,
Номер
90, С. 263 - 273
Опубликована: Окт. 4, 2024
Язык: Английский
Dual fuel engine injector temperature monitoring: An innovative thermal analysis approach
Applied Thermal Engineering,
Год журнала:
2024,
Номер
249, С. 123370 - 123370
Опубликована: Май 10, 2024
Язык: Английский
Exploring the benefits of hydrogen-water injection technology in internal combustion engines: A rigorous experimental study
International Journal of Engine Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Previous
hydrogen
researchers
have
demonstrated
the
great
potential
of
as
a
zero-carbon
fuel
and
its
wider
operational
ability
to
directly
replace
existing
fossil-fuelled
internal
combustion
engines
(ICE).
Hydrogen
direct-injection
technology
can
operate
at
stoichiometric
conditions,
fully
eliminating
intake
backfire
phenomena,
which
has
benefit
low
airflow
requirements
is
suitable
solution
for
naturally
aspirated
ICE
platforms.
However,
significant
challenges
must
be
addressed
when
operating
an
H2
or
near
stoichiometric.
These
include
rapid
pressure
rise
rate,
high
in-cylinder
gas
temperature
consequential
higher
engine-out
NOx
emissions.
This
study
provides
comprehensive
experimental
analysis
effect
water
injection
on
light-duty
H
2
engine’s
performance,
efficiency,
burn
durations
emission.
The
engine
was
modified
with
via
centrally-mounted
direct
injector
port-mounted
system.
included
vapour
measurements,
concentrations
other
exhaust
gases.
practical
implications
these
findings
are
significant.
results
that
emissions
were
reduced
by
79%
injected
rate
5
kg/h
10
bar
IMEP
2000
rpm.
reduction
in
emissions,
coupled
observed
decrease
cylinder
rise,
could
substantially
improve
performance
efficiency.
At
load
regions,
extended
maximum
24
increased
torque
output
10%.
Indicated
Thermal
Efficiency
(ITE)
from
41%
16.5
42.5%
18
lower
lambda,
corresponding
intake-air-boost
requirement.
Of
particular
note,
use
decreased
under
high-load
conditions
more
than
55%,
even
richer
AFR
compared
pure
operation.
Язык: Английский