caa a22 4500 445370432 CHVBK 20180317142944.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00340-011-4536-x doi (NATIONALLICENCE)springer-10.1007/s00340-011-4536-x Investigation on thermal accommodation coefficient and soot absorption function with two-color Tire-LII technique in rich premixed flames [Elektronische Daten] [S. Maffi, S. De Iuliis, F. Cignoli, G. Zizak] Although the two-color laser-induced incandescence technique (2C-LII) has proved to be a significant tool for soot diagnostics, many efforts are still required to gain a whole understanding of the chemical and physical processes involved. Time-resolved two-color LII measurements are carried out in a rich ethylene/air premixed flame at different heights above the burner and by changing the laser fluence. The prompt LII at two wavelengths and the corresponding soot incandescence temperature are obtained at different stages of the soot growth and under different laser irradiations. The decay rate of the LII signals, as a method for soot sizing, is investigated at different laser fluence. The time-resolved LII curves, obtained in the low laser fluence regime, are analyzed by a numerical simulation, available on the web. By considering the gas/particle initial temperature obtained with thermocouple measurements and by knowing soot particle diameter with previous TEM and extinction/scattering measurements, information about soot parameters, such as absorption function and thermal accommodation coefficient are obtained. The presence of the so-called young or mature soot along the flame height is strictly related to different optical and heat-exchange properties necessary to fit all the experimental data available. Springer-Verlag, 2011 Maffi S. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut De Iuliis S. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut Cignoli F. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut Zizak G. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut Applied Physics B Springer-Verlag 104/2(2011-08-01), 357-366 0946-2171 104:2<357 2011 104 340 https://doi.org/10.1007/s00340-011-4536-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4536-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maffi S. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut NATIONALLICENCE 700 1- De Iuliis S. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut NATIONALLICENCE 700 1- Cignoli F. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut NATIONALLICENCE 700 1- Zizak G. CNR-IENI, sede di Milano, via Cozzi, 53, 20125, Milano, Italy aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/2(2011-08-01), 357-366 0946-2171 104:2<357 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer