The aim of this work consists in presenting a simple modelling easily
usable in the industrial environment in order to predict the evolution
of thermodynamical characteristics of the combustion of solid-gas mix
tures in a closed vessel. In fact, very few studies have been interest
ed in the association of agricultural dusts with a gaseous energetic F
uel (propane or methane) despite many dramatic consequences. Basic cha
racteristics of modelling have been previously described to study corn
starch dust-air mixtures. A simple representation of the combustion ph
enomena based on energy transfers between particles and the action of
specific molecules is given, The modelling adaptation to diphasic mixt
ures is carried out studying the fluctuations of the model parameters.
The application conditions determine the fuel ratio of the used mixtu
res the adaptation of the chemical kinetics to the considered case and
the calculation of the model parameters. The proposed development sho
ws the model representativeness for a wide cornstarch concentration ra
nge (0.1 less than or equal to Delta less than or equal to 1kg/m(3)).
It gives the possibility to analyse the supply of energetic gaseous su
bstances (0 less than or equal to%C3H8 less than or equal to 6;0 less
than or equal to% CH4 less than or equal to 12) and to study the fuel
ratio of these two-phase mixtures for combustion times about 500 ms. T
he first results let appear correct tendencies in the predictions and
it seems interesting to evaluate in the future the model adaptability
to exclusively gaseous mixtures.