Abstract

A laser Doppler velocimeter has been developed that uses two of the colors emitted from an argon-ion laser for the simultaneous measurement of orthogonal velocities. Designed for use in a 2.13-m by 3.05-m wind tunnel, it is capable of traversing its focal volume across spatially unstable flows at scan speeds of up to 1.5 m/sec. Its optical layout and principles of operation are discussed, and the data from a typical traversal of a trailing wing-tip vortex are presented.

© 1973 Optical Society of America

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References

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  1. Y. Yeh, H. Z. Cummins, Appl. Phys. Lett. 4, 176 (1964).
    [CrossRef]
  2. R. J. Goldstein, W. F. Hagen, Phys. Fluids 10, 1349 (1967).
    [CrossRef]
  3. M. K. Mazumder, A Symmetrical Laser Doppler Velocity Meter and its Application to Turbulence Characterization, NASA CR-2031 (May1972).
  4. J. F. Meyers, “Investigation of Basic Parameters for the Application of a Laser Doppler Velocimeter,” AIAA 6th Aerodynamic Testing Conference, Paper 71-288 (March 1971).
  5. J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).
  6. D. B. Brayton, W. H. Goethert, New Velocity Measuring Technique Using Dual-Scatter Laser Doppler Shift, AEDC-TR-70-205 (November1970).
  7. H. H. Bossel, K. L. Orloff, J. Hydronautics 6, 101 (1972).
    [CrossRef]
  8. R. M. Huffaker, A. V. Jelatian, W. H. Keene, Aircraft Wake Turbulence and its Detection, J. H. Olsen et al. , ads. (PlenumNew York, 1971), pp. 113–124.
    [CrossRef]
  9. K. L. Orloff, G. R. Grant, The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation, NASA TM X-62,243 (February1973).
  10. A. E. Lennert, D. B. Brayton, F. L. Crosswy, Summary Report of the Development of a Laser Velocimeter to be Used in AEDC Wind Tunnels, AEDC-TR-70-101 (July1970).
  11. G. R. Grant, R. W. Donaldson, A Laser Velocity Measurement System for High-Temperature Wind Tunnels, NASA TM X-1976 (April1970).
  12. W. J. Yanta, D. F. Gates, F. W. Brown, “The Use of a Laser Doppler Velocimeter in Supersonic Flow,” AIAA 6th Aerodynamic Testing Conference, Paper 71-287 (March 1971).
  13. D. B. Brayton, H. T. Kalb, F. L. Crosswy, Appl. Opt. 12, 1145 (1973).
    [CrossRef] [PubMed]
  14. F. L. Crosswy, J. O. Hornkohl, A. E. Lennert, Signal Characteristics and Signal Conditioning Electronics for a Vector Velocity Laser Velocimeter, to be published Rev. Sci. Instrum. Sept.1973.
  15. K. L. Orloff, S. E. Logan, Appl. Opt. 12, 2477 (1973).
    [CrossRef] [PubMed]

1973 (2)

1972 (1)

H. H. Bossel, K. L. Orloff, J. Hydronautics 6, 101 (1972).
[CrossRef]

1968 (1)

J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).

1967 (1)

R. J. Goldstein, W. F. Hagen, Phys. Fluids 10, 1349 (1967).
[CrossRef]

1964 (1)

Y. Yeh, H. Z. Cummins, Appl. Phys. Lett. 4, 176 (1964).
[CrossRef]

Bossel, H. H.

H. H. Bossel, K. L. Orloff, J. Hydronautics 6, 101 (1972).
[CrossRef]

Brayton, D. B.

D. B. Brayton, H. T. Kalb, F. L. Crosswy, Appl. Opt. 12, 1145 (1973).
[CrossRef] [PubMed]

A. E. Lennert, D. B. Brayton, F. L. Crosswy, Summary Report of the Development of a Laser Velocimeter to be Used in AEDC Wind Tunnels, AEDC-TR-70-101 (July1970).

D. B. Brayton, W. H. Goethert, New Velocity Measuring Technique Using Dual-Scatter Laser Doppler Shift, AEDC-TR-70-205 (November1970).

Brown, F. W.

W. J. Yanta, D. F. Gates, F. W. Brown, “The Use of a Laser Doppler Velocimeter in Supersonic Flow,” AIAA 6th Aerodynamic Testing Conference, Paper 71-287 (March 1971).

Crosswy, F. L.

D. B. Brayton, H. T. Kalb, F. L. Crosswy, Appl. Opt. 12, 1145 (1973).
[CrossRef] [PubMed]

F. L. Crosswy, J. O. Hornkohl, A. E. Lennert, Signal Characteristics and Signal Conditioning Electronics for a Vector Velocity Laser Velocimeter, to be published Rev. Sci. Instrum. Sept.1973.

A. E. Lennert, D. B. Brayton, F. L. Crosswy, Summary Report of the Development of a Laser Velocimeter to be Used in AEDC Wind Tunnels, AEDC-TR-70-101 (July1970).

Cummins, H. Z.

Y. Yeh, H. Z. Cummins, Appl. Phys. Lett. 4, 176 (1964).
[CrossRef]

Donaldson, R. W.

G. R. Grant, R. W. Donaldson, A Laser Velocity Measurement System for High-Temperature Wind Tunnels, NASA TM X-1976 (April1970).

Fridman, J. D.

J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).

Gates, D. F.

W. J. Yanta, D. F. Gates, F. W. Brown, “The Use of a Laser Doppler Velocimeter in Supersonic Flow,” AIAA 6th Aerodynamic Testing Conference, Paper 71-287 (March 1971).

Goethert, W. H.

D. B. Brayton, W. H. Goethert, New Velocity Measuring Technique Using Dual-Scatter Laser Doppler Shift, AEDC-TR-70-205 (November1970).

Goldstein, R. J.

R. J. Goldstein, W. F. Hagen, Phys. Fluids 10, 1349 (1967).
[CrossRef]

Grant, G. R.

K. L. Orloff, G. R. Grant, The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation, NASA TM X-62,243 (February1973).

G. R. Grant, R. W. Donaldson, A Laser Velocity Measurement System for High-Temperature Wind Tunnels, NASA TM X-1976 (April1970).

Hagen, W. F.

R. J. Goldstein, W. F. Hagen, Phys. Fluids 10, 1349 (1967).
[CrossRef]

Hornkohl, J. O.

F. L. Crosswy, J. O. Hornkohl, A. E. Lennert, Signal Characteristics and Signal Conditioning Electronics for a Vector Velocity Laser Velocimeter, to be published Rev. Sci. Instrum. Sept.1973.

Huffaker, R. M.

J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).

R. M. Huffaker, A. V. Jelatian, W. H. Keene, Aircraft Wake Turbulence and its Detection, J. H. Olsen et al. , ads. (PlenumNew York, 1971), pp. 113–124.
[CrossRef]

Jelatian, A. V.

R. M. Huffaker, A. V. Jelatian, W. H. Keene, Aircraft Wake Turbulence and its Detection, J. H. Olsen et al. , ads. (PlenumNew York, 1971), pp. 113–124.
[CrossRef]

Kalb, H. T.

Keene, W. H.

R. M. Huffaker, A. V. Jelatian, W. H. Keene, Aircraft Wake Turbulence and its Detection, J. H. Olsen et al. , ads. (PlenumNew York, 1971), pp. 113–124.
[CrossRef]

Kinnard, R. F.

J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).

Lennert, A. E.

A. E. Lennert, D. B. Brayton, F. L. Crosswy, Summary Report of the Development of a Laser Velocimeter to be Used in AEDC Wind Tunnels, AEDC-TR-70-101 (July1970).

F. L. Crosswy, J. O. Hornkohl, A. E. Lennert, Signal Characteristics and Signal Conditioning Electronics for a Vector Velocity Laser Velocimeter, to be published Rev. Sci. Instrum. Sept.1973.

Logan, S. E.

Mazumder, M. K.

M. K. Mazumder, A Symmetrical Laser Doppler Velocity Meter and its Application to Turbulence Characterization, NASA CR-2031 (May1972).

Meyers, J. F.

J. F. Meyers, “Investigation of Basic Parameters for the Application of a Laser Doppler Velocimeter,” AIAA 6th Aerodynamic Testing Conference, Paper 71-288 (March 1971).

Orloff, K. L.

K. L. Orloff, S. E. Logan, Appl. Opt. 12, 2477 (1973).
[CrossRef] [PubMed]

H. H. Bossel, K. L. Orloff, J. Hydronautics 6, 101 (1972).
[CrossRef]

K. L. Orloff, G. R. Grant, The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation, NASA TM X-62,243 (February1973).

Yanta, W. J.

W. J. Yanta, D. F. Gates, F. W. Brown, “The Use of a Laser Doppler Velocimeter in Supersonic Flow,” AIAA 6th Aerodynamic Testing Conference, Paper 71-287 (March 1971).

Yeh, Y.

Y. Yeh, H. Z. Cummins, Appl. Phys. Lett. 4, 176 (1964).
[CrossRef]

Appl. Opt. (2)

Appl. Phys. Lett. (1)

Y. Yeh, H. Z. Cummins, Appl. Phys. Lett. 4, 176 (1964).
[CrossRef]

J. Hydronautics (1)

H. H. Bossel, K. L. Orloff, J. Hydronautics 6, 101 (1972).
[CrossRef]

Laser Focus (1)

J. D. Fridman, R. M. Huffaker, R. F. Kinnard, Laser Focus 4, No. 21, 34 (Nov1968).

Phys. Fluids (1)

R. J. Goldstein, W. F. Hagen, Phys. Fluids 10, 1349 (1967).
[CrossRef]

Other (9)

M. K. Mazumder, A Symmetrical Laser Doppler Velocity Meter and its Application to Turbulence Characterization, NASA CR-2031 (May1972).

J. F. Meyers, “Investigation of Basic Parameters for the Application of a Laser Doppler Velocimeter,” AIAA 6th Aerodynamic Testing Conference, Paper 71-288 (March 1971).

R. M. Huffaker, A. V. Jelatian, W. H. Keene, Aircraft Wake Turbulence and its Detection, J. H. Olsen et al. , ads. (PlenumNew York, 1971), pp. 113–124.
[CrossRef]

K. L. Orloff, G. R. Grant, The Application of Laser Doppler Velocimetry to Trailing Vortex Definition and Alleviation, NASA TM X-62,243 (February1973).

A. E. Lennert, D. B. Brayton, F. L. Crosswy, Summary Report of the Development of a Laser Velocimeter to be Used in AEDC Wind Tunnels, AEDC-TR-70-101 (July1970).

G. R. Grant, R. W. Donaldson, A Laser Velocity Measurement System for High-Temperature Wind Tunnels, NASA TM X-1976 (April1970).

W. J. Yanta, D. F. Gates, F. W. Brown, “The Use of a Laser Doppler Velocimeter in Supersonic Flow,” AIAA 6th Aerodynamic Testing Conference, Paper 71-287 (March 1971).

F. L. Crosswy, J. O. Hornkohl, A. E. Lennert, Signal Characteristics and Signal Conditioning Electronics for a Vector Velocity Laser Velocimeter, to be published Rev. Sci. Instrum. Sept.1973.

D. B. Brayton, W. H. Goethert, New Velocity Measuring Technique Using Dual-Scatter Laser Doppler Shift, AEDC-TR-70-205 (November1970).

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Figures (3)

Fig. 1
Fig. 1

Schematic diagram of two-color laser Doppler velocimeter.

Fig. 2
Fig. 2

Vortex velocity distributions—slow traversal.

Fig. 3
Fig. 3

Vortex velocity distributions—fast traversal.

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