Experimental and numerical investigations on a swirl oxycoal flame

► Measures derived for an aerodynamical stabilization of a swirl Oxyfuel flame. ► Successful use of CFD calculations as a design tool. ► Stable Oxyfuel combustion achieved for oxygen contents between 18 and 30 vol.-%. ► Numerical investigation of an industrial size furnace for retrofit considerations. ► Retrofit seems feasible by adjusting the oxidizer's oxygen concentration.