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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper CThG1

Filtered Rayleigh scattering—a route to whole-field velocity, temperature, and density

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Abstract

There is great interest in developing diagnostic tools which are capable of imaging volumetric flow-field parameters such as temperature, density, and velocity. To date, the majority of approaches towards this goal have relied on seeding the flow with foreign material. For example, particle tracking methods are being developed for velocity measurements, and seed gases such as nitric oxide, OH, sodium, and iodine are being explored for the measurement of temperature and density as well as velocity.1 Rayleigh scattering from unseeded gases has recently become a practical tool for density and structure measurements in high-speed flows.2 The extension of Rayleigh scattering to the measurement of temperature and velocity alleviates the need for introducing foreign seed material and raises the possibility of a diagnostic tool which is generally applicable.

© 1991 Optical Society of America

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