Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
Reducing the combustion length, improving the flame
stability, generating sufficient vortical recirculation zones, and
extending the durability of furnace insulation are some reasons
to target swirling flow in combustion chambers with sufficient
swirl characteristics. These reasons aim to increase the species
residence time and improve the mixing quality in the related
combustion chambers. As is known, burning the waste-gas
material in incinerators can produce toxic pollutants.
Nevertheless, one main objective in incineration combustor is
to improve the flow mixing characteristics. Our concern in this
paper is to improve the mixing characteristics of one available
incinerator with some unsuitable pollution using the CFD
simulation. We study the flow patterns and analyze the mixing
quality to monitor the influence of waste-gas inlet crosssections
and its position into the incinerator chamber. The
degree of mixing is analyzed using the standard deviation
parameter, which determines the homogeneity of the fuel
mixture fraction in the incinerator chamber. The improvement
of mixing characteristics and increasing the residence time in
the incinerator are two important factors, which are suitably
elaborated and discussed in this paper. The mixing study is
provided for cold gas assumption.