Optical Constants of Soot and Their Application to Heat-Flux Calculations

Data on the room temperature optiaI.1 constants of soot are presentedfor the 'Wavelength regions 0.4-().8j.1 and 2.5-1O.0j.l. Dispersion formulas are developedfor interpolating the data between0.8 and 2.5j.1. The results are used to calculate the spectral absorption coefficient and the total emissivities of soot suspensions. It is shown that the correct values of the optiaI.l constants are neededin the use of light-scattering techniques for the measurement of the soot concentration but that uncertainties introduced in flux