Abstract
Planar laser-induced predissociative fluorescence is applied to image state-specific densities of OH and hot O2 inside an internal-combustion car engine. Improved instrumentation is described. It includes better imaging optics and a spectrometer that permits desired molecular quantum states to be selected and identified in real time. The OH (ν″ = 0) images are cleanly separated from the isooctane fuel and they display a thin superequilibrium region at the flame front. In contrast, vibrationally excited O2 (ν″ = 6 or ν″ = 7) is uniformly distributed behind the front. Uneven and broken flame fronts are commonly observed.
© 1992 Optical Society of America
Full Article | PDF ArticleMore Like This
Peter Andresen, Gerard Meijer, Harald Schlüter, Heiner Voges, Andrea Koch, Werner Hentschel, Winfried Oppermann, and Erhard Rothe
Appl. Opt. 29(16) 2392-2404 (1990)
Michael Knapp, Andreas Luczak, Harald Schlüter, Volker Beushausen, Werner Hentschel, and Peter Andresen
Appl. Opt. 35(21) 4009-4017 (1996)
James D. Smith and Volker Sick
Appl. Opt. 44(31) 6682-6691 (2005)