Fourier Transform Infrared Emission/Transmission Spectroscopy in Flames

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Abstract
A better understanding of the combustion process would enable improved combustion systems to be designed and developed. In investigating the behavior of combusting systems, it is desirable to have nonintrusive techniques to monitor the composition, physical properties, and temperatures of the various phases (gas, soot particles, droplets, aerosols, coal, char, and fly ash) present. Techniques to measure these phenomena must be capable of following the behavior of the solid particles as well as the gas species. Many of the techniques for gas analysis have been recently reviewed (Penner, Wang, and Bahadori 1984 a, b; Hardesty 1984). For particle temperature, two- or more-color pyrometry has been used extensively (Timothy, Sarofim, and Beer 1982; Mitchell and McLean 1982; Cashdollar and Hertzberg 1983; Mackowski et al. 1983; Altenkirch et al. 1984; Seeker et al. 1981). Advances in optical emission techniques to measure simultaneously size, velocity, and temperature of single particles have also been reported (Macek and Bulik 1984; Tichenor et al. 1984).

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