Fire Safety Science Digital Archive

The radiation of the luminous flame behaves differently from that of non-luminous ones in that the former can have a radiative energy 2-3 times as much as that of the latter. It then becomes important to determine, in a reasonable way, the influence of the soot particles in the luminous flame on the radiative properties of the flames. Based on the fundamental optical and electromagnetic theories, a new approximate approach is put forward in this paper for calculating the emissivity of flames with soot particles which can fit the accuracy of engineering requirement. The result can be helpful in the design of portable polychromatic flame bolometer.