SOOT MEASUREMENTS IN A CHLORINATED COUNTERFLOW DIFFUSION FLAME USING A LASER SCATTERING AND EXTINCTION TECHNIQUE

The effects of the presence of chlorinated species on soot formation h ave been studied in laminar diffusion flames burning chlorinated hydro carbons. Measurements have been made of the structure of a chlorinated laminar, diffusion flame that is stabilized in a stagnation point flo w around a porous cylinder, Comparisons have been made between a pure methane flame and a flame of 50% methane and 50% methyl chloride. Temp erature profiles were obtained with a thermocouple. Laser Doppler velo cimetry was used to measure the velocity of the gas along the streamli ne. Laser extinction and scattering techniques were employed to charac terize the soot aerosol. It was found that the addition of the methyl chloride to methane caused soot production, as measured by the soot vo lume fraction, to increase by at least an order of magnitude.