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Study on the feasibility of OH concentration quantitative measurements in premixed flat flame by bi-directional laser induced fluorescence

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Abstract

The feasibility of OH concentration quantitative measurement in premixed flame is investigated by the bi-directional laser induced fluorescence (LIF), combined with the direct absorption spectroscopy. The effective peak absorption cross section and the average temperature at a height of 2 mm above the burner are 1.86×10−15 cm2 and 1719 K, respectively. The spatial distributions of OH concentration are obtained with the equivalence ratios 0.9 and 1.2. The spatial resolution of the measured result is 84 μm.

© 2015 Optical Society of America

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