multaneous soot temperature and volume fraction measurements in axis-symmetric flames by a twodimensional modulated absorption/emission technique. Combustion and Flame, Elsevier, 2015, 162, pp.2705 -2719. <10.1016/j.combustflame.2015 AbstractThe original contribution of the present paper is to present a joint theoretical and experimental approach to implement the modulated absorption/emission technique. Two-dimensional fields of soot temperature and volume fraction can then be measured simultaneously in a reference steady laminar coflow axis-symmetric non-premixed ethylene flame estalished over * Corresponding author Email addresses: guillaume.legros@dalembert.upmc.fr (Guillaume Legros ), wangqianlong212@gmail.com (Qianlong Wang), jerome.bonnety@upmc.fr (Jérôme Bonnety), muhammad.kashif@ucp.edu.pk (Muhammad Kashif), celine.morin@univ-valenciennes.fr (Céline Morin), jean-louis.consalvi@univ-amu.fr (Jean-Louis Consalvi),

A Laser Extinction Method has been set up to provide two-dimensional soot volume fraction field time history at a tunable frequency up to 70 Hz inside an axis-symmetric diffusion flame experiencing slow unsteady phenomena preserving the symmetry. The use of a continuous wave laser as the light source enables this repetition rate, which is an incremental advance in the laser extinction technique. The technique is shown to allow a fine description of the soot volume fraction field in a flickering flame exhibiting a 12.6 Hz flickering phenomenon. Within this range of repetition rate, the technique and its subsequent post-processing require neither any method for time-domain reconstruction nor any correction for energy intrusion. Possibly complemented by such a reconstruction method, the technique should support further soot volume fraction database in oscillating flames that exhibit characteristic times relevant to the current efforts in the validation of soot processes modeling.

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