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@MISC{AskarizadehRavizi:1005444,
author = {Askarizadeh Ravizi, Hossein and Pielsticker, Stefan and
Nicolai, Hendrik and Özer, Burak and Kneer, Reinhold and
Hasse, Christian and Maßmeyer, Anna Lisa},
title = {{I}nfluence of the devolatilisation kinetics on the
numerical simulation of pulverised fuel swirl flames under
oxyfuel conditions - {S}upplementary dataset},
reportid = {RWTH-2025-01763},
year = {2025},
abstract = {Numerous studies can be found concerning the development of
various models to describe devolatilisation within the solid
fuel conversion process. Despite the availability of
detailed devolatilisation models, such as chemical
percolation devolatilisation (CPD), simplified ones, such as
the single first-order reaction (SFOR) and the competing
two-step model (C2SM), are typically used in numerical
simulations because of their low computational cost. In this
study, walnut shells and Rhenish lignite are employed as
pulverised fuels for an oxyfuel-fired reference case and
their devolatilisation kinetics are determined
experimentally using a fluidised bed reactor. To show the
influence of devolatilisation kinetics on the flames, a
simulation tool in Ansys Fluent is developed based on
Reynolds-averaged Navier–Stokes (RANS) equations. The
numerical tool is equipped with user-defined functions to
take into account the modifications needed in an oxyfuel
compared to air atmosphere regarding gas and particle
radiation and particle kinetics. The parameter sets for
devolatilisation kinetics are determined experimentally
using a fluidised bed reactor and for comparison are also
taken from existing numerical investigations in the
literature. Significant differences can be observed,
particularly in particle temperatures and the release of
their volatile contents when using different parameter sets
for devolatilisation kinetics. Particle temperatures
obtained using the experimentally determined parameter sets
in the simulations show improvements in the accuracy of the
simulations up to 22 $\%$ compared to those obtained when
using the available parameter sets in the literature.
Further improvements in comparisons are observed by
considering heat transfer limitations to particles in
high-temperature zones. The numerical tool captures small
heat transfer limitations leading to a reduction in
reactivity of particles improving the agreement between
numerical and experimental results on particle
temperatures.},
cin = {412610},
cid = {$I:(DE-82)412610_20140620$},
pnm = {DFG project G:(GEPRIS)215035359 - TRR 129: Oxyflame -
Entwicklung von Methoden und Modellen zur Beschreibung der
Reaktion fester Brennstoffe in einer Oxyfuel-Atmosphäre
(215035359) / DFG project G:(GEPRIS)240966705 -
Experimentelle Untersuchung der Biomasseverbrennung zur
Validierung numerischer Simulationen (C01) (240966705) / DFG
project G:(GEPRIS)240967567 - Instationäre Modellierung und
Simulation von Oxy-Fuel-Feuerräumen (C02) (240967567) / DFG
project G:(GEPRIS)240954932 - Experimentelle Untersuchung
von Pyrolyse- und Koksumsatzkinetiken in einem
„Well-Stirred-Reactor“ unter atmosphärischen und
druckbeaufschlagten Bedingungen (A01) (240954932)},
pid = {G:(GEPRIS)215035359 / G:(GEPRIS)240966705 /
G:(GEPRIS)240967567 / G:(GEPRIS)240954932},
typ = {PUB:(DE-HGF)32},
doi = {10.18154/RWTH-2025-01763},
url = {https://publications.rwth-aachen.de/record/1005444},
}
Gast ::