Single-shot CARS thermometry of high-pressure hydrocarbon flames using simultaneous intensity and linewidth measurements

✍ Scribed by K. A. Vereschagin; V. V. Smirnov; O. M. Stel'makh; V. I. Fabelinsky; W. Clauss; M. Oschwald

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 270 KB
• Volume: 41
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.2698

✦ Synopsis

Abstract

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.