Abstract

A method of obtaining time-resolved measurements of gas temperatures in a combustion environment is described. The noncontact optical laser-beam deflection technique utilizes rapid heating at a gas–solid interface as an acoustic source and is capable of acquiring localized temperature values at a repetition rate of >1 kHz. Measurements taken on a premixed propane–air laboratory flame show a 12.5-Hz thermal oscillation at the flame edge and no significant oscillation at the center.

© 1985 Optical Society of America

Noncontact optoacoustic monitoring of flame temperature profiles

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