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Rotational CARS thermometry at high temperature (1800 K) and high pressure (0.1-1.55 MPa)

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Author

Summary, in English

Dual-broadband rotational CARS (DB-RCARS) thermometry has been investigated at high temperature and high pressure. Single-shot measurements were performed at 1800 K, in air and nitrogen at pressures up to 1.55 MPa and in oxygen at pressures up to 0.5 MPa. For all conditions, the resonant signal contribution to the spectra clearly dominated over the non-resonant one, implying the high potential for DB-RCARS for temperature and concentration measurements also at the high temperatures and pressures used in the present investigation. The relative standard deviation was generally similar to 2% for single-shot data at pressures from 0.5 to 1.55 MPa. At the investigated temperature, 1800 K, rotational lines from thermally excited vibrational states could be observed in the highly resolved experimental spectra. Using a previously developed weighting procedure applied to these lines, it was demonstrated that the temperature standard deviation could be lowered with as much as 30%.

Department/s

Publishing year

2007

Language

English

Pages

963-968

Publication/Series

Journal of Raman Spectroscopy

Volume

38

Issue

8

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • gas-phase thermometry
  • rotational CARS
  • combustion diagnostics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1097-4555