Thermometry in pressurized sooting flames using laser-induced gratings

Michael S. Brown; William L. Roberts

doi:10.1117/12.279755

21 November 1997 Thermometry in pressurized sooting flames using laser-induced gratings

Michael S. Brown, William L. Roberts

Proceedings Volume 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III; (1997) https://doi.org/10.1117/12.279755
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

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.

Citation Download Citation

Michael S. Brown and 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); https://doi.org/10.1117/12.279755

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