Publikacje

Abstract:

Research on gas explosiveness, processes governing the reaction
and parameters of combustible mixtures has been carried out for decades
from different angles, which testifies to the essence and importance of these
experiments. From a practical and actively applicable point of view, the
knowledge of mechanisms and circumstances favoring combustion
processes is a very important factor in counteracting and minimizing
explosion hazards. The parameters of occurring reactions are necessary to
determine further quantities describing the process. One of the most
important parameters describing a combustible mixture is the laminar
burning velocity and its dependence on the following factors: composition
of the combustible mixture as well as initial temperature and pressure. The
knowledge of this value provides the basis for calculations of back-flow
parameters, flame cone angle in burners and turbulent burning velocity. It is
also an indispensable parameter in studies on flame stabilization and
extinction.
The topic of this publication was realized due to the importance of
the combustible mixture parameter, which is the laminar burning velocity,
and the limited amount of data on the influence of the initial temperature on
its magnitude.
In order to determine the laminar burning velocity, four different
numerical models and the CANTERA toolbox with the GRI-Mech 3.0
mechanism of chemical reaction kinetics were used. The parameters
necessary for calculations with the models described in this paper were
obtained experimentally, using an adapted research apparatus - a spherical
combustion chamber with dedicated software for recording explosion data

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Influence of initial temperature on laminar burning velocity in hydrogen-air mixtures as potential for green energy carrier