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The study of swirling jet
combustor for biomass coal co-firing is of great interest for energy industry.
The biomass co-firing can serve as a NOx reduction method as well as the better
use of renewable energy source. Large eddy simulation (LES) and RANS modelling
have been performed with two different burner designs. Usually pulverized
coal-biomass mixture enters the furnace along with primary air through primary
pipe, and the secondary pipe provides necessary air and mixing for combustion.
The improved model has three passages including primary, secondary and middle
passage for swirling. The simulations on two
geometries have been compared, and the aim is to design a better and improved
burner model for better pre-combustion mixing in the biomass co- fired furnace.
The results from two-way and three-way geometry have been compared with each
other as well as with the results from the furnace model used by Apte and