Radiative properties of flame-generated soot

Journal Article · Sat May 01 04:00:00 EDT 1993 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910693· OSTI ID:5619159

Koeylue, U O; Faeth, G M ^[1]

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1. Univ. of Michigan, Ann Arbor (United States)

Approximate methods for estimating the optical properties of flame-generated soot aggregates were evaluated using existing computer simulations and measurements in the visible and near-infrared portions of the spectrum. The following approximate methods were evaluated for both individual aggregates and polydisperse aggregate populations: the Rayleigh scattering approximation, Mie scattering for an equivalent sphere, and Rayleigh-Debye-Gans (R-D-G) scattering for both given and fractal aggregates. Results of computer simulations involved both prescribed aggregate geometry and numerically generated aggregates by cluster-cluster aggregation; multiple scattering was considered exactly using the mean-field approximation, and ignored using the R-D-G approximation. Measurements involved the angular scattering properties of soot in the postflame regions of both premixed and nonpremixed flames. The results show that available computer simulations and measurements of soot aggregate optical properties are not adequate to provide a definitive evaluation of the approximate prediction methods. 40 refs., 7 figs., 1 tab.

• OSTI ID: 5619159
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 115:2; ISSN JHTRAO; ISSN 0022-1481
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
AGGLOMERATION
CHEMICAL REACTIONS
COMBUSTION
COMPUTERIZED SIMULATION
ENERGY TRANSFER
HEAT TRANSFER
HYDROCARBONS
INFRARED SPECTRA
MATHEMATICAL MODELS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
OXIDATION
PHYSICAL PROPERTIES
RADIANT HEAT TRANSFER
SCATTERING
SIMULATION
SOOT
SPECTRA
THERMOCHEMICAL PROCESSES
VISIBLE SPECTRA