caa a22 4500 445370319 CHVBK 20180317142944.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s00340-011-4372-z doi (NATIONALLICENCE)springer-10.1007/s00340-011-4372-z Laser induced incandescence determination oftheratio ofthesoot absorption functions at 532nm and 1064nm inthenucleation zone of a low pressure premixed sooting flame [Elektronische Daten] [G. Cléon, T. Amodeo, A. Faccinetto, P. Desgroux] In this work, the two-excitation wavelength laser induced incandescence (LII) method has been applied in a low-pressure premixed methane/oxygen/nitrogen flame (equivalence ratio 2.32) to determine the variation of the ratio of the soot absorption functions at 532nm and 1064nm E(m,532nm)/E(m,1064nm) along the flame. This method relies on the comparison of LII signals measured upon two different excitation wavelengths (here 532nm and 1064nm) and with laser fluences selected in such a way that the soot particles are equally laser-heated. The comparison of the laser fluences at 532nm and 1064nm leads to an easy determination of E(m,532nm)/E(m,1064nm). The reliability of the method is demonstrated for the first time in a low pressure flame in which the soot nucleation zone can be spatially resolved and which contains soot particles acting differently with the laser fluence according to their residence time in the flame. The method is then applied to determine the profile of E(m,532nm)/E(m,1064nm) along the flame. Avery important decrease of this ratio is observed in the region of nascent soot, while the ratio remains constant at high distance above the burner. Implication on temperature determination from spectrally resolved measurement of flame emission is studied. Springer-Verlag, 2011 Cléon G. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut Amodeo T. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut Faccinetto A. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut Desgroux P. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut Applied Physics B Springer-Verlag 104/2(2011-08-01), 297-305 0946-2171 104:2<297 2011 104 340 https://doi.org/10.1007/s00340-011-4372-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4372-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cléon G. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut NATIONALLICENCE 700 1- Amodeo T. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut NATIONALLICENCE 700 1- Faccinetto A. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut NATIONALLICENCE 700 1- Desgroux P. Laboratoire de Physico-Chimie des Processus de Combustion et de l'Atmosphère (PC2A, UMR CNRS 8522), Université Lille 1, 59655, Villeneuve d'Ascq cedex, France aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/2(2011-08-01), 297-305 0946-2171 104:2<297 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer