Article Number 200508, November 2005

Time-resolved temperature images of laser-ignition using OH two-line laser-induced fluorescence (LIF) thermometry

Wenhong Qin¹, Ying-Ling Chen², and J. W. L. Lewis²

¹ JDS Uniphase Corp.
Shenzhen 518038
China

² Center for Laser Applications
The University of Tennessee Space Institute
411 B. H. Goethert Parkway
Tullahoma, Tennessee 37388-8897
USA

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ABSTRACT:

The time-resolved spatial distribution of temperature for the transient laser-induced ignition of ammonia / oxygen mixtures is presented. Planar laser-induced fluorescence (PLIF) of OH was used to measure the temperature distribution by means of two selected transition lines observed using a steady flame to provide the collision quenching correction over the necessary range of temperatures. Information on the spatial and temporal evolution of gas temperature and species concentrations is essential for numerical modeling of laser spark ignition.

Keywords:

laser-induced breakdown, OH laser-induced fluorescence, time-resolved, planar laser-induced fluorescence, laser ignition

Corresponding Author:

Ying-Ling Chen
Center for Laser Applications
The University of Tennessee Space Institute
411 B. H. Goethert Parkway
Tullahoma, Tennessee 37388-8897

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