caa a22 4500 445370297 CHVBK 20180317142944.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00340-011-4396-4 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4396-4 Investigation of optical properties of aging soot [Elektronische Daten] [F. Migliorini, K. Thomson, G. Smallwood] The optical properties of soot, in particular the propensity of soot to absorb and scatter light as a function of wavelength, are key parameters for the correct interpretation of soot optical diagnostics. An overview of the data available in the literature highlights the differences in the reported optical properties of aging soot. In many cases, the properties of mature soot are used when evaluating in-flame soot but this assumption might not be suitable for all conditions and should be checked. This need has been demonstrated by performed spectral resolved line-of-sight attenuation (Spec-LOSA) measurements on an ethylene/air premixed and non-premixed flame. Transmission electron microscopy of thermophoretically sampled soot was also performed to qualify the soot aging and to establish soot morphology in order to correct light extinction coefficients for the scattering contribution. The measured refractive index absorption function, E(m)λ, showed a very strong spectral dependence which also varied with height above the burner for both flames. However, above 700nm, the slope of the refractive index function was near zero for both flames and all measurement heights. The upper visible and near infrared wavelengths are therefore recommended for soot optical measurements. Her Majesty the Queen in Right of Canada, 2011 Migliorini F. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut Thomson K. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut Smallwood G. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut Applied Physics B Springer-Verlag 104/2(2011-08-01), 273-283 0946-2171 104:2<273 2011 104 340 https://doi.org/10.1007/s00340-011-4396-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4396-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Migliorini F. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut NATIONALLICENCE 700 1- Thomson K. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut NATIONALLICENCE 700 1- Smallwood G. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, K1A 0R6, Ottawa, Ontario, Canada aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/2(2011-08-01), 273-283 0946-2171 104:2<273 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer