Abstract

A three-dimensional imaging technique has been developed that permits the investigation of the time development of a scalar in turbulent reacting flows. An aerosol-seeded premixed flame was illuminated by four closely spaced parallel laser sheets of different wavelength. Lorenz–Mie scattering from the four illumination sheets was imaged onto an intensified two-dimensional charge-coupled-device array. Bandpass filters and a multi-image optical component in the collection optics allowed individual sheets to be imaged onto different areas of the charge-coupled-device array. A double-pulsed Nd:YAG laser was used in conjunction with a rotating mirror in the collection optics to enable instantaneous three-dimensional images to be obtained at two times separated by 100 μs.

© 1991 Optical Society of America

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