- Author
- Cattolica, R. J. | Vosen, S. R.
- Title
- Two-Dimensional Fluorescence Imaging of [OH] in a Constant Volume Combustion Chamber.
- Coporate
- Sandia Labs., Livermore, CA
- Report
- WSS/CI Paper 84-30, 1984, 24 p.
- Book or Conf
- Combustion Institute/Western States Section. Spring Meeting, 1984. April 2-3, 1984, Boulder, CO, 1984
- Keywords
- combustion chambers | flame chemistry | lasers
- Abstract
- The planar distribution of the OH concentration in a methane-air flame in a constant volume combustion chamber has been measured with two-dimensional laser-induced fluorescence. A Nd:Yag-pumped pulsed dye laser with frequency doubling was used to form a sheet of laser light which excited the OH A2E (v'=l) - X2II (v"=0) transition. The resulting fluorescence from the OH molecule in a propagating flame was observed with a low-light-level vidicon camera. A map of the OH concentration in the combustion chamber was obtained over a field of view covering 45 mm X 60 mm with a spatial resolution of 0.6 mm X 0.6 mm. For a single 5 ns laser pulse, the fluorescence signal-to-noise ratio (S/N) is 10 at the maximum OH concentration of 2.4 x 10(16) cm-3. The measured OH number density profile agrees with the prediction of a laminar flame model to within the experimental accuracy.