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INCHUL CHOI, IGOR V. ADAMOVICH AND WALTER R. LEMPERT, Michael A. Chaszeyka Nonequilibrium Thermodynamics Laboratory, Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210.
We present recent results of laser-induced fluorescence measurements of hydroxyl radical density in repetitively pulsed nanosecond plasmas, created using 10-20 nsec duration, high (up to 20 kV) voltage pulsers, capable of operation at repetition rates as high as 40-50 kHz. OH mole fraction as a function of time with respect to discharge creation is determined, with absolute calibration performed using a Hencken flat flame burner. This paper will focus on a series of low temperature, non-equilibrium kinetics measurements in hydrogen and hydrocarbon-air mixtures, with results compared to predictions of a recently developed plasma chemical oxidation model.