Abstract
The simultaneous two-point density fluctuations in a V-shaped turbulent flame are measured using a two-point Rayleight scattering method. A wrinkled laminar flame model with finite instataneeous flame thickness is developed for the flames studied. The reaction front spatial probability density function is both measured directly and also calculated from the measured mean density. An analytical expression for this pdf is given which is derived based on a thin flame model. The mean, rms and correlation coefficients are calculated using the finite reaction front thickness model and the results are compared with the experimental data. The pdf of the intermediate states are shown to be due to the reaction front thickness.
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