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Single‐shot CARS thermometry of high‐pressure hydrocarbon flames using simultaneous intensity and linewidth measurements
Author(s) -
Vereschagin K. A.,
Smirnov V. V.,
Stel'makh O. M.,
Fabelinsky V. I.,
Clauss W.,
Oschwald M.
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2698
Subject(s) - laser linewidth , spectrograph , rocket (weapon) , laser , optics , interferometry , combustion , raman scattering , intensity (physics) , chemistry , temperature measurement , single shot , analytical chemistry (journal) , raman spectroscopy , materials science , physics , spectral line , thermodynamics , engineering , organic chemistry , chromatography , astronomy , aerospace engineering
We demonstrate the feasibility of single laser shot coherent anti‐Stokes Raman scattering thermometry with simultaneous measurement of intensities of hydrogen Q ‐branch lines and their linewidths in a pulsed CH 4 /O 2 combustion chamber operating at 20 MPa pressure and 3000 K temperature—parameters that are typical for full‐scale rocket engines. The measurements were done by means of a spectrograph combined with an interferometer having orthogonal directions of dispersions. This approach allows correct temperature evaluation that takes into account the directly measured linewidths. Copyright © 2010 John Wiley & Sons, Ltd.