Results 211 to 220 of about 12,370 (256)
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Soot-velocity measurements by particle vaporization velocimetry
Optics Letters, 1999We demonstrate a new imaging technique for velocity measurements in particle-laden flows. The technique, particle vaporization velocimetry, is a form of flow tagging based on laser vaporization of absorbing particles at defined locations in the flow.
J M, Seitzman, R T, Wainner, P, Yang
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Effect of Engine Load on Diesel Soot Particles
Environmental Science & Technology, 2004This study concentrates on characterization of nonvolatile fraction of diesel particles. These particles have an impact on earth's radiation balance as well as on health effects of vehicle emissions. In addition to composition and size distribution of particles, an important factor affecting their health effects and properties and lifetimes in the ...
Virtanen, Annele K.K. +3 more
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Combustion and Flame, 1991
Although there have been many studies of soot formation, the processes involved are still not fully understood. Recently, particular attention has been directed at the rate of growth of soot particles when rich premixed hydrocarbon-oxygen mixtures are burned in a flat flame, but an alternative approach is to compare the reported growth rates for soot ...
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Although there have been many studies of soot formation, the processes involved are still not fully understood. Recently, particular attention has been directed at the rate of growth of soot particles when rich premixed hydrocarbon-oxygen mixtures are burned in a flat flame, but an alternative approach is to compare the reported growth rates for soot ...
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Soot Particle Nucleation and Agglomeration
1983In considering the overall phenomenon of soot formation, we are dealing with the evolution of a carbonaceous aerosol in hot reactive gases. If we assume that this aerosol is well described as a monodispersion of spherical particles, its characterization can be made with a knowledge of the particle number density N, the diameter of the particles d, and ...
Gilles Prado +2 more
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Charged Particles in Sooting Flames II. Determination of the Fraction of Charged Soot
Berichte der Bunsengesellschaft für physikalische Chemie, 1983AbstractA new technique has been developed allowing the determination of the relative amounts of charged and neutral soot in fuel‐rich premixed low‐pressure flames. Results on C2H2 and C6H6 flames are reported and used, together with charged particle number densities, to calculate soot mass fractions and particle sizes.
K. H. Homann, H. Wolf
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Scattering and radiative properties of complex soot and soot-containing aggregate particles
Journal of Quantitative Spectroscopy and Radiative Transfer, 2007Abstract We use the superposition T-matrix method to compute the scattering matrix elements and optical cross-sections for a variety of complex soot and soot-containing aggregate particles in random orientation at a visible wavelength 0.628 μm. It is shown that random variations in the geometrical configuration of monomers in a soot cluster for fixed
Li Liu, Michael I. Mishchenko
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Measurement of the soot concentration and soot particle sizes in propane oxygen flames
Symposium (International) on Combustion, 1981Soot concentrations and particle sizes were measured by light scattering and probe measurements in the burnt gas region of atmospheric pressure propane-oxygen flames and propane-oxygen flames to which hydrogen or ammonia were added. The results show that the soot concentrations in propane-oxygen flames, to which hydrogen is added are lower compared to ...
H. Bockhorn +4 more
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Mapping of Soot Particles in a Weakly Sooting Diffusion Flame by Aerosol Techniques
Combustion and Flame, 1998The evolution of detailed particle size distributions has been measured along the centerline of an axisymmetric diffusion flame of CH4 + Ar burning in air at 1 atm. Soot particles with mean diameters of 3–18 nm were observed. Changes in the size distribution exhibited zones where either nucleation, coagulation, or destruction of soot particles ...
H Hepp, K Siegmann
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Electrophoretic Aerosol focusing for Soot Particle Analysis
2015In this work, a focused deposition technique was developed and applied to soot particles produced in a laminar premixed flame of ethylene and air. Particles were collected by means of an Electrostatic Precipitator (ESP), coupled with a Corona charger device used for unipolar charging of particles.
G Trunfio +4 more
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Characterization of soot and crystalline atmospheric ultrafine particles
Environmental PollutionThe extraction and characterization of atmospheric ultrafine particles (UFPs) is critical to understanding environmental health and climate dynamics. This study uses an aqueous extraction method to characterize the size distribution, shape, and composition of atmospheric UFPs.
Francisco Berrellez-Reyes +4 more
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