The pulverised coal combustion in a swirl burner is a complex phenomenon. A simplified numerical model, using RANS approach, has been developed in order to predict the combustion processes in a swirl burner with an accuracy comparable to that of Large Eddy Simulations (LES). The effect of different combustion environments such as air, oxy-steam (O 2 /H 2 O) and oxy-recycled flue gas (O 2 /CO 2 ) on gas temperature and NO concentration has been studied. The proposed numerical model may be used for faster and reliable analysis of pulverised coal combustion in a swirl burner; useful for industrial applications.