Abstract
Temporal correlations of concentration fluctuations have been studied using both spontaneous Raman and Rayleigh scattering.1,2 Two DCR-11 Nd:YAG pulsed lasers doubled to 532 nm were used to probe the mixing layer optically at an axial position of ≤2D from the jet orifice. The jet was provided by a ASME flat-top velocity profile nozzle with a 4.77- mm orifice. Vertical flows in still room air with exit Reynolds numbers of between 3,000 and 30,000 were studied. Gases used in the jet were CO2, N2, and air.
© 1993 Optical Society of America
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