Experimental and numerical investigations in the near-burner region of a versatile multi-fuel burner

An experimental and numerical investigation on the effect of swirl on the motion of coal particles in the near-burner region of a versatile multi-fuel swirl-stabilised laboratory burner of total thermal input of 100kW, has been performed. The burner was designed as a scale model of a lOMW coal burner operating in a cement rotary kiln, produces flames of different aerodynamic characteristics, and can bum a combination of gaseous, liquid and pulverised solid fuels. Air and fuel were introduced through multiple CO-axial pipes and the ratio of swirl to axial air was varied while maintaining the same air-to-fuel ratio. The ability of the laboratory burner to produce flames close-to-industrial conditions renders it a powerful tool in the field of combustion research.