Abstract

A single-pulse, laser-saturated fluorescence technique has been developed for absolute OH concentration measurements with a temporal resolution of 2 nsec, a spatial resolution of <0.1 mm3, and an estimated accuracy of ±30%. It has been applied in laminar, transitional, and turbulent hydrogen–air diffusion flames, providing the first reported quantitative measurements of average values, rms fluctuations, and probability density functions of OH radical concentration in nonpremixed flames.

© 1984 Optical Society of America

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