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Proceedings Paper

Two-beam femtosecond rotational CARS for one-dimensional thermometry in a turbulent, sooting jet flame
Author(s): Daniel R. Richardson; Sukesh Roy; James R. Gord; Sean P. Kearney
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Paper Abstract

Single-laser-shot femtosecond rotational coherent anti-Stokes Raman scattering (fs-RCARS) temperature measurements are performed across a 6-mm line in a turbulent, sooting ethylene jet flame to characterize temperature gradients. A 60- fs pulse is used to excite many rotational Raman transitions in N2, and a 160-ps pulse is used to probe the Raman coherence. The spatial resolution of the measurements is 500 μm in the direction of beam propagation and 50 μm in the transverse directions. Measurements have been performed at multiple locations in the jet flame, and the measured temperature are similar to previously recorded point measurements. Future work will include performing simultaneous laser-induced incandescence (LII) measurements to measure soot volume fraction to perform joint statistical analysis of the sooting turbulent flame.

Paper Details

Date Published: 17 February 2017
PDF: 5 pages
Proc. SPIE 10094, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII, 100941E (17 February 2017); doi: 10.1117/12.2248914
Show Author Affiliations
Daniel R. Richardson, Spectral Energies, LLC (United States)
Sukesh Roy, Spectral Energies, LLC (United States)
James R. Gord, Air Force Research Lab. (United States)
Sean P. Kearney, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 10094:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII
Alexander Heisterkamp; Peter R. Herman; Michel Meunier; Roberto Osellame, Editor(s)

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