The Extinction of Counterflow Premixed Flames Burning Diluted Methane-Air, and Diluted Propane-Air Mixtures

Abstract–A theoretical and experimental investigation of the mechanisms of extinction of counterflow premixed flames burning methane and propane is outlined. Premixed flames were stabilized between counterflowing streams of a fuel-lean, premixed mixture of fuel, air, and nitrogen and that of pure nitrogen. The composition of the combustible mixture at extinction as a function of the strain rate were measured over a wide parametric range. The …