Temperature profiles laser Raman scattering

Figure 5. Temperature, CH4, and C02 profiles for a fuel-lean ( == 0.86) atmospheric-pressure, premixed, laminar CHh- air flame. The experimental data are from laser Raman scattering and the theoretical predictions are from the computer code of Ref. 1 (---------), theory (%), temperature (N2) (O), C02 (A), CH...

The hydroxyl concentration profile for a stoichiometric CH -air flame is presented in Figure 8. Here the maximum mole fraction observed and the predicted mole fraction are equal to better than 10% accuracy. The abscissas of the theoretical and the experimental results were matched by setting the theoretically predicted temperature equal to the measured hydroxyl rotational temperature. At all positions in the flame the hydroxyl 2j[(v,=o) state exhibited a Boltzmann distribution of rotational states. This rotational temperature is equal to the N2 vibrational temperature to within the +100 K precision of the laser induced fluorescence and laser Raman scattering experiments. An example of this comparison is given in Figure 9. 

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