Abstract
The overall objective of the project was to develop a methodology to identify different type of particles in flames using light diagnostic techniques. During the course of this project, the authors completed a total of eight publications. A short summary of these eight papers is presented here along with the eighth paper. In this eighth study, a methodology is discussed to identify the Mueller (scattering) matrix elements of soot agglomerates in diffusion flames. For this purpose, an experimental system based on Nd:YAG laser and optical parametric oscillator is designed and built. The technique is first tested numerically for different size soot agglomerates and very good agreements were observed. After that, elliptically polarized laser light is directed on an ethylene diffusion flame. Scattered light from the flame is passed through a polarizer/retarder pair before being measured. By repeating this procedure for six different conditions, six important elements of the scattering matrix are measured. The comparison of the trends of experimental and numerical data shows that this method is very promising for flame studies.
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