NIST Time|NIST Home|About NIST|Contact NIST

HomeAll Years:AuthorKeywordTitle2005-2010:AuthorKeywordTitle

Refractive Indices of Overfire Soot in Large Buoyant Turbulent Diffusion Flames.


pdf icon Refractive Indices of Overfire Soot in Large Buoyant Turbulent Diffusion Flames. (143 K)
Wu, J. S.; Krishnan, S. K.; Lin, K. C.; Faeth, G. M.

NISTIR 5904; October 1996.

National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. October 28-31, 1996, Gaithersburg, MD, 25-26 pp, 1996.

Sponsor:

National Institute of Standards and Technology, Gaithersburg, MD

Available from:

National Technical Information Service
Order number: PB97-153514

Keywords:

fire research; fire science; soot; turbulent flames; diffusion flames

Abstract:

Information about the optical properties of soot is needed in order to develop reliable nonintrusive measurements of soot physical properties and estimates of soot radiation properties in flame environments. Unfortunately, current estimates of soot optical properties are limited by excessive uncertainties about soot refractive indices. Motivated by this observation, the objective of the present investigation was to experimentally determine soot refractive indices at visible wavelengths (350-800 nm). Soot in the overfire region of buoyant turbulent diffusion flames in the long residence time regime (where soot properties are independent of position and residence time) was studied, considering flames fueled with acetylene, propylene, ethylene and propane burning in still air.