Abstract

A simultaneous multipoint, two-component Doppler velocimeter is described. The system uses two optical cavities: a Fabry–Perot etalon and an optical cavity for collecting and recirculating the Rayleigh–Mie-scattered light that is collected from the measurement volume in two parallel but opposite directions. Single-pulse measurements of two orthogonal components of the velocity vector in a supersonic free jet were performed to demonstrate the technique. The recirculation of the light rejected by the interferometer input mirror also increased the signal intensity by a factor of 3.5.

© 2006 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. R. G. Seasholtz and L. J. Goodman, 'Three component velocity measurements using Fabry-Perot interferometer,' presented at the Second International Symposium on Applications of Laser Anemometry to Fluid Mechanics sponsored by Instituto Superior Tecnico (Lisbon), Lisbon, Portugal, July 2-4, 1984 (also NASA TM 83692).
  2. R. G. Seasholtz and L. J. Goldman, in Advanced Instrumentation for Aero Engine Components, AGARD Conference Proceedings No. 399 (AGARD, 1986), p. 13-1 [presented at the Propulsion and Energetics 67th Symposium, Philadelphia, Pa., May 19-23, 1986].
  3. P. L. Eggins and D. Jackson, J. Phys. D 8, 45 (1975).
    [CrossRef]
  4. R. G. Seasholtz, 'Instantaneous 2D velocity and temperature measurements in high speed flows based on spectrally resolved molecular Rayleigh scattering,' presented at the AIAA 33rd Aerospace Sciences Meeting, AIAA-95-0300, Reno, Nev., January 9-12, 1995.
  5. G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
    [CrossRef]
  6. R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
    [CrossRef]
  7. J. F. Meyers, Meas. Sci. Technol. 6, 769 (1995).
    [CrossRef]
  8. D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
    [CrossRef]

2001 (2)

G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
[CrossRef]

R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
[CrossRef]

1999 (1)

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

1995 (1)

J. F. Meyers, Meas. Sci. Technol. 6, 769 (1995).
[CrossRef]

1975 (1)

P. L. Eggins and D. Jackson, J. Phys. D 8, 45 (1975).
[CrossRef]

Bivolaru, D.

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

Carter, C. D.

G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
[CrossRef]

Eggins, P. L.

P. L. Eggins and D. Jackson, J. Phys. D 8, 45 (1975).
[CrossRef]

Elliott, G. S.

G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
[CrossRef]

Forkey, J. N.

R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
[CrossRef]

Glumac, N.

G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
[CrossRef]

Goldman, L. J.

R. G. Seasholtz and L. J. Goldman, in Advanced Instrumentation for Aero Engine Components, AGARD Conference Proceedings No. 399 (AGARD, 1986), p. 13-1 [presented at the Propulsion and Energetics 67th Symposium, Philadelphia, Pa., May 19-23, 1986].

Goodman, L. J.

R. G. Seasholtz and L. J. Goodman, 'Three component velocity measurements using Fabry-Perot interferometer,' presented at the Second International Symposium on Applications of Laser Anemometry to Fluid Mechanics sponsored by Instituto Superior Tecnico (Lisbon), Lisbon, Portugal, July 2-4, 1984 (also NASA TM 83692).

Jackson, D.

P. L. Eggins and D. Jackson, J. Phys. D 8, 45 (1975).
[CrossRef]

Lempert, W.

R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
[CrossRef]

Meyers, J. F.

J. F. Meyers, Meas. Sci. Technol. 6, 769 (1995).
[CrossRef]

Miles, R. B.

R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
[CrossRef]

Ötügen, M. V.

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

Papadopoulos, G.

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

Seasholtz, R. G.

R. G. Seasholtz, 'Instantaneous 2D velocity and temperature measurements in high speed flows based on spectrally resolved molecular Rayleigh scattering,' presented at the AIAA 33rd Aerospace Sciences Meeting, AIAA-95-0300, Reno, Nev., January 9-12, 1995.

R. G. Seasholtz and L. J. Goldman, in Advanced Instrumentation for Aero Engine Components, AGARD Conference Proceedings No. 399 (AGARD, 1986), p. 13-1 [presented at the Propulsion and Energetics 67th Symposium, Philadelphia, Pa., May 19-23, 1986].

R. G. Seasholtz and L. J. Goodman, 'Three component velocity measurements using Fabry-Perot interferometer,' presented at the Second International Symposium on Applications of Laser Anemometry to Fluid Mechanics sponsored by Instituto Superior Tecnico (Lisbon), Lisbon, Portugal, July 2-4, 1984 (also NASA TM 83692).

Tzes, A.

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

AIAA J. (1)

D. Bivolaru, M. V. Ötügen, A. Tzes, and G. Papadopoulos, AIAA J. 37, 688 (1999).
[CrossRef]

J. Phys. D (1)

P. L. Eggins and D. Jackson, J. Phys. D 8, 45 (1975).
[CrossRef]

Meas. Sci. Technol. (3)

G. S. Elliott, N. Glumac, and C. D. Carter, Meas. Sci. Technol. 12, 452 (2001).
[CrossRef]

R. B. Miles, W. Lempert, and J. N. Forkey, Meas. Sci. Technol. 12, 33 (2001).
[CrossRef]

J. F. Meyers, Meas. Sci. Technol. 6, 769 (1995).
[CrossRef]

Other (3)

R. G. Seasholtz, 'Instantaneous 2D velocity and temperature measurements in high speed flows based on spectrally resolved molecular Rayleigh scattering,' presented at the AIAA 33rd Aerospace Sciences Meeting, AIAA-95-0300, Reno, Nev., January 9-12, 1995.

R. G. Seasholtz and L. J. Goodman, 'Three component velocity measurements using Fabry-Perot interferometer,' presented at the Second International Symposium on Applications of Laser Anemometry to Fluid Mechanics sponsored by Instituto Superior Tecnico (Lisbon), Lisbon, Portugal, July 2-4, 1984 (also NASA TM 83692).

R. G. Seasholtz and L. J. Goldman, in Advanced Instrumentation for Aero Engine Components, AGARD Conference Proceedings No. 399 (AGARD, 1986), p. 13-1 [presented at the Propulsion and Energetics 67th Symposium, Philadelphia, Pa., May 19-23, 1986].

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)

Fig. 1
Fig. 1

Optical setup for measuring two orthogonal components of flow velocity. F-P, Fabry–Perot interferometer; BC, beam combiner.

Fig. 2
Fig. 2

Fabry-Perot interferograms. (a) Rayleigh scattering in static room air. (b) Mie scattering in a supersonic jet with mirror M r exactly aligned onto the optical axis—close-up view of the first two fringe patterns. (c) Rayleigh scattering in the supersonic jet with mirror M r tilted slightly to separate the two collection directions.

Fig. 3
Fig. 3

Spectra of Mie and Rayleigh scattering from water clusters generated naturally in the flow. The distance between the left and right measurement points was about 0.5 mm in the flow.

Fig. 4
Fig. 4

(a) Rayleigh spectra in stagnant air. (b), (c) Interferograms used to extract these spectra.

Metrics