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Applied Physics B

, Volume 67, Issue 5, pp 667–673 | Cite as

Thermal grating and broadband degenerate four-wave mixing spectroscopy of OH in high-pressure flames

  • H. Latzel
  • A. Dreizler
  • T. Dreier
  • J. Heinze
  • M. Dillmann
  • W. Stricker
  • G.M. Lloyd
  • P. Ewart
Regular paper

2

∑–X2Π(0,0) band of OH has been studied in premixed methane/air flames using a cw Ar+ laser probe. Measurements of flame temperature and pressure were derived from fits of theoretical simulations to the observed time variation of signals over a pressure range of 10 to 40 bar and for different stoichiometry that were in agreement with independent measurements using N2 CARS and predictions of a one-dimensional flame calculation. Broadband DFWM spectra in the same band of OH were observed up to a pressure of 9 bar, above which signals were obtained only from scattering from thermal gratings.

PACS: 42.62.Fi; 84.40.Py 

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Copyright information

© Springer-Verlag 1998

Authors and Affiliations

  • H. Latzel
    • 1
  • A. Dreizler
    • 1
  • T. Dreier
    • 1
  • J. Heinze
    • 2
  • M. Dillmann
    • 2
  • W. Stricker
    • 2
  • G.M. Lloyd
    • 3
  • P. Ewart
    • 3
  1. 1.Physikalisch Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, GermanyDE
  2. 2.DLR, Institut f. Physikalische Chemie der Verbrennung, Pfaffenwaldring 38-40, D-70569 Stuttgart, GermanyDE
  3. 3.Clarendon Laboratory, Oxford University, Parks Road, Oxford OX1 3PU, UK (E-mail: p.ewart@physics.oxford.ac.uk)UK

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