Laser Induced Fluorescence Spectroscopy for Making in-Situ Species Concentration Measurements in Turbulent Combustion Flows.
CALIFORNIA UNIV BERKELEY DEPT OF MECHANICAL ENGINEERING
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The major portion of the year was spent in preliminary work with sodium. The method of saturated laser induced fluorescence spectroscopy was demonstrated for sodium and a number for problem areas were delineated and accounted for. Decay experiments were conducted to back out chemical decay rates for excited state sodium. For atomic species an alternative to fluorescence spectroscopy is near resonant Rayleigh or Raman scattering for measuring species concentrations. Experiments have been performed with sodium which show not only the feasibility of the techniques, but show that it may be extended to much higher number densities than fluorescence because of reduced trapping. Work was started on OH. A number of fluorescence and fluorescence excitation spectra were generated which will be used to develop pumping strategies.
- Lasers and Masers
- Fluid Mechanics
- Atomic and Molecular Physics and Spectroscopy
- Combustion and Ignition