Application Of Laser Doppler Velocimetry To Flame Propagation Studies

Kyung-Kook Cho; In-Seuck Jeung

doi:10.1117/12.935389

26 October 1983 Application Of Laser Doppler Velocimetry To Flame Propagation Studies

Kyung-Kook Cho, In-Seuck Jeung

Proceedings Volume 0398, Industrial Applications of Laser Technology; (1983) https://doi.org/10.1117/12.935389
Event: 1983 International Technical Conference/Europe, 1983, Geneva, Switzerland

Abstract

Gas flow speed along the combustion chamber longitudinal axis of a suddenly propagating flame into a quiescent propane-air premixed combustible gas charged inside an open combustion chamber, and ignited by the usual capacitor discharge ignitor, under the initial conditions of room temperature and atmospheric pressure, was investigated by using a one component laser Doppler velocimetry ( LDV ) equipped with a 15 mW He-Ne gas laser and a 40 MHz Bragg cell based frequency shifter and a frequency tracker of maximum dynamic slew rate of 10 MHz/msec. The measured velocity profile of pre- and post-combustion period are demonstrated with a flame front propagating shapes visualized by high speed schlieren photography. Their results show reasonable agreement if the refraction effect due to a flame front is fully considered. The flame front just approaching and passing through the LDV measuring volume has the role or effect of a suddenly moving concave lens in the optical path of the LDV system.

Citation Download Citation

Kyung-Kook Cho and In-Seuck Jeung "Application Of Laser Doppler Velocimetry To Flame Propagation Studies", Proc. SPIE 0398, Industrial Applications of Laser Technology, (26 October 1983); https://doi.org/10.1117/12.935389

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