Trans-spectral absorption and scattering of electromagnetic radiation by diesel soot.

The mass density normalized absorption and total scattering coefficients have been measured using in situ techniques at selected wavelengths from the visible to approximately 1 cm for soot generated by the open combustion of diesel fuel. Particle morphologies are complex although similar to those of soots of other hydrocarbons and methods of generation. An ellipsoidal model has been applied as an approximation to the often multiconnected, chainlike aerosol and then compared with the measured results. The experimental results show an approximate (lambda)(-1) dependence over more than five decades of wavelength data. There is only general agreement with the simplified calculations in this feature as well as in the magnitude.

[1]  K A Fuller,et al.  Consummate solution to the problem of classical electromagnetic scattering by an ensemble of spheres. I: Linear chains. , 1988, Optics letters.

[2]  G. Mulholland,et al.  Cluster size distribution for free molecular agglomeration , 1988 .

[3]  A Goldman,et al.  The HITRAN database: 1986 edition. , 1987, Applied optics.

[4]  M. Querry,et al.  Optical constants of minerals and other materials from the millimeter to the ultraviolet , 1987 .

[5]  P. Waterman,et al.  Absorption and Scattering by Conductive Fibers: Basic Theory and Comparison with Asymptotic Results. , 1985 .

[6]  Michael E. Cates,et al.  Homogeneity and spectral dimension of aggregation fractals , 1984 .

[7]  J. D. Felske,et al.  Determination of the Refractive Indices of Soot Particles from the Reflectivities of Compressed Soot Pellets , 1984 .

[8]  R. Botet,et al.  Diffusion limited aggregation with directed and anisotropic diffusion , 1984 .

[9]  H. Hentschel.  Fractal Dimension of Generalized Diffusion-Limited Aggregates , 1984 .

[10]  C. Bruce,et al.  Millimeter wave gas/aerosol spectrophone and application to diesel smoke. , 1984, Applied optics.

[11]  M. Querry.  Optical Properties of Natural Minerals and Other Materials in the 350-50,000 CM-1 Spectral Region. , 1983 .

[12]  C. Bruce,et al.  Propagation at 10 microm through smoke produced by atmospheric combustion of diesel fuel. , 1983, Applied optics.

[13]  L. Colangeli,et al.  The absorption efficiency of submicron amorphous carbon particles between 2.5 and 40 μm , 1983 .

[14]  Robert D. Cess,et al.  The Effect of Tropospheric Aerosols on the Earth's Radiation Budget: A Parameterization for Climate Models , 1983 .

[15]  K D Möller,et al.  Infrared optical constants of black powders determined from reflection measurements. , 1981, Applied optics.

[16]  R. Stevenson,et al.  Optical Properties and Morphology of Particulate Carbon: Variation with Air/Fuel Ratio , 1981 .

[17]  J. Pollack,et al.  Radiative properties of the background stratospheric aerosols and implications for perturbed conditions , 1981 .

[18]  D. Roessler,et al.  Optoacoustic measurement of optical absorption in acetylene smoke , 1979 .

[19]  S. Chippett,et al.  The size and optical properties of soot particles , 1978 .

[20]  R. Viskanta,et al.  Modeling of the Effects of Gaseous and Particulate Pollutants in the Urban Atmosphere. Part I: Thermal Structure , 1973 .

[21]  Masayuki Tanaka,et al.  Increase of Global Albedo Due to Air Pollution , 1972 .

[22]  E. T. Arakawa,et al.  Optical properties of glassy carbon from 0 to 82 eV , 1972 .

[23]  S. Schneider,et al.  Atmospheric Carbon Dioxide and Aerosols: Effects of Large Increases on Global Climate , 1971, Science.

[24]  A. F. Sarofim,et al.  Optical Constants of Soot and Their Application to Heat-Flux Calculations , 1969 .

[25]  C. R. Howarth,et al.  Optical constants of carbons and coals in the infrared , 1968 .

[26]  Robert W. Fenn,et al.  Scattering Properties of Concentric Soot–Water Spheres for Visible and Infrared Light , 1965 .

[27]  W. D. Erickson,et al.  Light scattering measurements on soot in a benzeneair flame , 1964 .

[28]  Milton Kerker,et al.  Scattering of Electromagnetic Waves from Two Concentric Spheres , 1951 .

[29]  H. A. Clark.  The Optical Properties of Carbon , 1906 .