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The application of CARS for temperature measurements in high pressure combustion systems

✍ Scribed by M. Woyde; W. Stricker

Publisher
Springer
Year
1990
Tongue
English
Weight
756 KB
Volume
50
Category
Article
ISSN
0721-7269

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✦ Synopsis

The determination of accurate temperatures from CARS N 2 Q-branch spectra in premixed flames is discussed for pressures up to 40 bar. The influence of collisional line narrowing in the CARS spectra is modelled by a MEG fitting law. It takes into account collisions of Nz with CO2 and H20. The analysis of the CARS data showed that the nonresonant background has an increasing influence on temperature with increasing pressure. Little influence on the quality of the fit between theory and experiment was found. Since there is a danger of residual systematic temperature deviations, which cannot be identified from the quality of the fit, spontaneous rotational Raman scattering is employed as an independent measuring technique.

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