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Conferences > CLEO > 1993 > CTuN > CTuN69
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1993),
  • paper CTuN69

Temporal scale measurements of number density fluctuations in the shear layer of free and acoustically driven axisymmetric jets using a two-pulsed laser scheme

P. P. Yaney, J. W. Parish, and D. A. Steck

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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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