Predictions of Radiative Properties for Fly-Ash Polydispersions in Combustion Gas

概要

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Monochromatic radiative properties of anisotropically scattering fly-ash polydispersions in combustion gas, such as an extinction coefficient, a scattering coefficient, a scattering albedo and Legendre expansion coefficients for a phase function, are calculated by the Mie scattering computer code with the monochromatic complex refractive index measured and arranged in a wavelength region of 0.7〜13μm and with a measured or an estimated bimodal particle distribution of fly-ash. Extinction and absorption coefficients calculated for fly-ash polydispersions closely agree with the results obtained by a small-particle (x≪1) approximation when the Sauter diameter D_<32> for polydispersions is much smaller than the incident wavelength (x_<32><0.1). They also agree with the approximations of the complex refractive index near 1(|m-1|≪1) when D_<32> is much larger than the wavelength (x_<32>>10) ; in the intermediate region (0.1<x_<32><10), however, exact Mie scattering calculations are required.
一般社団法人日本機械学会の論文
1994-08-15