Combustion instability: Radiation from premixed flames of variable burning velocity

Abstract The visible and u.v. radiation from flat flames burning premixed carbon monoxide-air and methane-air at various mixture ratios, and one bunsen type flame burning a methane-air mixture has been examined over a range of burning velocities. In the flat flame, the burning velocity was reduced below its normal value by heat extraction from the flame, and in the bunsen flame, the burning velocity was increased above its normal value by preheating the gas. It was found that the square root of the power radiated from unit area of flame is a linear function of the mass burning rate per unit area of flame. Possible inferences are drawn for oscillating flames on solid propellant surfaces.