Ky0907

This paper describes experiments to test a diffusion flame theory for predicting flame sizes. The experiments used two burner geometries - circular and slotted ports. Diffusion flame heights were measured using carbon monoxide concentrations and soot profiles. For circular ports, flame height predictions matched experiments when using a characteristic flame temperature of 1500 K. For slot burners, flame height was controlled by either momentum or buoyancy effects, transitioning as predicted when the modified Froude number was one. The theory accurately predicted flame sizes and compositions for different fuels and conditions.