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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

RADIATIVE PROPERTIES OF THE LOW-TEMPERATURE THERMAL PLASMA WITH THE PULVERIZED COAL

Olga S. Vaulina
High Energy Density Research Center, Russian Academy of Sciences, IVTAN, Moscow, Russia

Anatoli P. Nefedov
Institute for High Energy Densities, Russian Academy of Sciences, IVTAN, Izhorskaya, 13/19, Moscow, 127412, Russia

Oleg F. Petrov
Joint Institute of High Temperatures RAS, Russian Academy of Science, Moscow, Russia

Alex A. Samarian
High Energy Density Research Center, Russian Academy of Sciences, Izhorskaya 13/19, 127412, Moscow, Russia

Alex V. Chernyschev
High Energy Density Research Center, Russian Academy of Sciences, Izhorskaya 13/19, 127412, Moscow, Russia

Abstract

The polydispersions of ash, and coal particles in the flow of the propane-air flame combustion products were measured at the spectral range from 0.5 to 1.2 µm. The particle temperature was varied from 1900 to 2250 K. To conduct experiments the novel optical diagnostic techniques have been used which allowed to measure temperatures of particles and gas; mean sizes and concentration of particles; optical density, and spectral emissivity of a cloud of coal particles. The plasma flow spectral emissivity and single scattering albedo measurements have been carried out at the different step of the conversion process of coal particles. These measurements allowed to make a conclusion about the contribution of the particle emittance into radiative transfer in the flow of the low-temperature dusty plasma.