2010 Volume 52 Issue 162 Pages 302-310
Multiphase combustion is a complex phenomenon in which dispersion of liquid droplets or sold particles, their evaporation or devolatilization, and chemical reactions take place interactively at the same time, so that the underlying physics governing these processes has not been well understood and modeled especially for turbulent flows. With the remarkable progress in the performance of computers, the studies by means of direct numerical simulation (DNS) and large-eddy simulation (LES) of such turbulent multiphase combustion fields have recently been done. The DNS shows the detailed combustion behavior such that both premixed and diffusion flames coexist and droplet group combustion appears in spray flames. On the other hand, the LES is able to capture the general behavior of the spray and pulverized coal combustion fields in industrial equipments, although there still remain challenges towards the reliable prediction in terms of the mathematical models on turbulent combustion and pollutant emissions.
