Abstract

The interaction between a laminar non premixed flame and a vortex is examined. The CH radical layer produced by the flame is imaged, for the first time in this configuration, using planar laser induced fluorescence (PLIF). Simultaneous partcle-imange velocimetry (PIV) measurements gives flowfield data. The methane-air flame is supported in a nonpremixed opposed-jet burner. In this work, the extinction processes occurred during the interaction is analyzed. Also, in the experiments, it appear that PAH fluorescence strongly perturb CH LIF measurements. To clarify this, the effects of equivalence ratio, droplet seeding and laser energies on CH vs. PAH fluorescence are studied.

© 2002 Optical Society of America