Abstract

An imaging technique based on Raman scattering induced by a KrF excimer laser has been developed for quantitative simultaneous multiple-point measurements of absolute multispecies concentrations (O2, N2, H2, and H2O) and temperature in turbulent flames. These multiparameter measurements along the laser line have a temporal resolution of 17 ns, a spatial resolution of 0.7 mm for each point, and single-shot standard deviations of ~8%. The UV Raman imaging system has been applied in turbulent nonpremixed hydrogen–air flames, providing what are to our knowledge the first reported single-pulse, simultaneous multiple-point quantitative images of multiple species and temperature.

© 1994 Optical Society of America

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  1. T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
    [CrossRef]
  2. R. S. Barlow, R. W. Dibble, R. P. Lucht, Opt. Lett. 14, 263 (1989).
    [CrossRef] [PubMed]
  3. S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
    [CrossRef]
  4. M. B. Long, D. C. Fourguette, M. C. Escoda, C. B. Layne, Opt. Lett. 8, 244 (1983).
    [CrossRef] [PubMed]
  5. W. Reckers, L. Hüwel, G. Grünfeld, P. Andresen, Appl. Opt. 32, 907 (1993).
    [CrossRef] [PubMed]
  6. J. A. Wehrmeyer, T. S. Cheng, R. W. Pitz, Appl. Opt. 31, 1495 (1992).
    [CrossRef] [PubMed]
  7. R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
    [CrossRef]
  8. R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
    [CrossRef]
  9. P. H. Paul, in Digest of AIAA 27th Joint Propulsion Conference (American Institute of Aeronautics and Astronautics, Washington, D.C., 1991), paper 91-2315.

1993 (2)

W. Reckers, L. Hüwel, G. Grünfeld, P. Andresen, Appl. Opt. 32, 907 (1993).
[CrossRef] [PubMed]

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

1992 (2)

J. A. Wehrmeyer, T. S. Cheng, R. W. Pitz, Appl. Opt. 31, 1495 (1992).
[CrossRef] [PubMed]

T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
[CrossRef]

1991 (1)

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

1989 (1)

1983 (1)

1976 (1)

R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
[CrossRef]

Andresen, P.

Barlow, R S.

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

Barlow, R. S.

Bilger, R. W.

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
[CrossRef]

Cheng, T. S.

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
[CrossRef]

J. A. Wehrmeyer, T. S. Cheng, R. W. Pitz, Appl. Opt. 31, 1495 (1992).
[CrossRef] [PubMed]

Dibble, R. W.

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

R. S. Barlow, R. W. Dibble, R. P. Lucht, Opt. Lett. 14, 263 (1989).
[CrossRef] [PubMed]

Escoda, M. C.

Fourguette, D. C.

Goulard, R.

R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
[CrossRef]

Grünfeld, G.

Hess, C. F.

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

Hüwel, L.

Layne, C. B.

Long, M. B.

Lucht, R. P.

Mellor, A. M.

R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
[CrossRef]

Paul, P. H.

P. H. Paul, in Digest of AIAA 27th Joint Propulsion Conference (American Institute of Aeronautics and Astronautics, Washington, D.C., 1991), paper 91-2315.

Pitz, R. W.

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
[CrossRef]

J. A. Wehrmeyer, T. S. Cheng, R. W. Pitz, Appl. Opt. 31, 1495 (1992).
[CrossRef] [PubMed]

Reckers, W.

Stårner, S. H.

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

Wehrmeyer, J. A.

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
[CrossRef]

J. A. Wehrmeyer, T. S. Cheng, R. W. Pitz, Appl. Opt. 31, 1495 (1992).
[CrossRef] [PubMed]

Appl. Opt. (2)

Appl. Phys. B (1)

R. W. Pitz, T. S. Cheng, J. A. Wehrmeyer, C. F. Hess, Appl. Phys. B 56, 94 (1993).
[CrossRef]

Combust. Flame (2)

T. S. Cheng, J. A. Wehrmeyer, R. W. Pitz, Combust. Flame 91, 323 (1992).
[CrossRef]

S. H. Stårner, R. W. Bilger, R. W. Dibble, R S. Barlow, Combust. Flame 83, 63 (1991).
[CrossRef]

Combust. Sci. Technol. (1)

R. Goulard, A. M. Mellor, R. W. Bilger, Combust. Sci. Technol. 14, 195 (1976).
[CrossRef]

Opt. Lett. (2)

Other (1)

P. H. Paul, in Digest of AIAA 27th Joint Propulsion Conference (American Institute of Aeronautics and Astronautics, Washington, D.C., 1991), paper 91-2315.

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Figures (3)

Fig. 1
Fig. 1

Schematic of the UV Raman imaging system.

Fig. 2
Fig. 2

Excitation spectra of OH, O2, and H2O showing the fluorescence interferences in a hydrogen–air flame. The KrF excimer laser is tuned to 248.634 nm (dotted line) to suppress these interferences.

Fig. 3
Fig. 3

Single-pulse multiple-point Raman imaging in the reaction zone of a turbulent nonpremixed hydrogen-air jet flame 9 diameters downstream and a Reynolds number of 4400 (jet exit velocity, 220 m/s) along a 4.8-mm laser line: (a) line Raman spectra at 24 radial locations, (b) quantitative mole fraction and temperature measurements at 12 radial locations calculated from (a).

Tables (1)

Tables Icon

Table 1 Typical Single-Shot Relative Standard Deviations (%) of Temperature and Species Mole Fractions for One of the 12 Spatial Points

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