21 November 1997 Thermometry in pressurized sooting flames using laser-induced gratings
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We have performed non-intrusive thermometry in rich ethylene/air flames using a frequency measurement based on laser-induced gratings. Light from a cw probe beam is coherently scattered from a thermal or electrostrictive grating induced by the pulsed pump beams. The Doppler modulation of the signal beam is determined by the local speed of sound from which a temperature can be extracted. Soot particles, acting as blackbody absorbers do contribute to the signal.
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Michael S. Brown, Michael S. Brown, William L. Roberts, William L. Roberts, } "Thermometry in pressurized sooting flames using laser-induced gratings", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); doi: 10.1117/12.279755; https://doi.org/10.1117/12.279755

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