Abstract
Two-dimensional visualization of soot has been realized in flames with the use of laser-induced fluorescence in C<sub>2</sub> from laser-vaporized soot [LIF(C<sub>2</sub>)LVS]. Soot particles are heated to vaporization temperatures by the absorption of laser radiation. C<sub>2</sub> radicals produced by this process are excited at wavelengths around 563 nm through the transition <i>v'</i> = 0 <i>d</i><sup>3</sup>Π<sub>g</sub> ← <i>v"</i> = 1 <i>a</i><sup>3</sup>Π<sub>u</sub> and the subsequent fluorescence at ∼516 nm is detected. By frequency-doubling of the laser radiation, wavelengths around 281.5 nm are achieved, which can excite OH radicals to the <i>v'</i> = 1 A<sup>2</sup>Σ<sup>+</sup> state from <i>v"</i> = 0 X<sup>2</sup>Π, with subsequent fluorescence at ∼310 nm. With the use of both these excitation wavelengths, and a Cassegrainian split-mirror telescope as the imaging detection system in front of the charge-coupled device (CCD) camera, simultaneous two-dimensional single-shot images of soot and OH were obtained on a single CCD chip, thus enabling both sooting regions and reaction zones in flames to be monitored.
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy