The paper deals with the development of mathematical models for detailed
simulation of lateral jet penetration into the fluidized bed (FB), primarily
from the aspect of feeding of gaseous and liquid fuels into FB furnaces. For
that purpose a series of comparisons has been performed between the results
of in-house developed procedure- fluid-porous medium numerical simulation of
gaseous jet penetration into the fluidized bed, Fluent?s two-fluid
Euler-Euler FB simulation model, and experimental results (from the
literature) of gaseous jet penetration into the 2D FB. The calculation
results, using both models, and experimental data are in good agreement. The
developed simulation procedures of jet penetration into the FB are applied to
the analysis of the effects, which are registered during the experiments on a
fluidized pilot furnace with feeding of liquid waste fuels into the bed, and
brief description of the experiments is also presented in the paper.
Registered effect suggests that the water in the fuel improved mixing of fuel
and oxidizer in the FB furnace, by increasing jet penetration into the FB due
to sudden evaporation of water at the entry into the furnace. In order to
clarify this effect, numerical simulations of jet penetration into the FB
with three-phase systems: gas (fuel, oxidizer, and water vapour), bed
particles and water, have been carried out.
Three-dimensional numerical simulation of upflow bubbling fluidized bed in opaque tube under high flux solar heating