Absolute concentration measurements of OH in low-pressure hydrogen-oxygen, methane-oxygen, and acetylene-oxygen flames

Kohse-Höinghaus K, Koczar P, Just T. Absolute concentration measurements of OH in low-pressure hydrogen-oxygen, methane-oxygen, and acetylene-oxygen flames. PROCEEDINGS OF THE COMBUSTION INSTITUTE. 1986;21(1):1719-1727.Corresponding OH concentration and temperature profiles were determined for a variety of low-pressure flames using the method of laser-induced saturated fluorescence as described earlier by the authors. For the example of a well-characterized H2-O2-Ar flame, the parameters influencing the accuracy of species concentration and temperature measurements are discussed in detail. Good agreement with both literature data and a chemical-kinetic computer model was obtained. The temperature was shown to be a sensitive parameter in the modelling. For different flame conditions, OH concentration and temperature profiles in CH4-O2 and C2H2-O2 flames are reported which may be used for detailed comparisons with chemical-kinetic flame models