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A high-resolution laser Doppler anemometer for three-dimensional turbulent boundary layers

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Abstract

 A new laser Doppler anemometer optimized for high spatial resolution near a wall is described. The instrument uses short focal length optics, a mirror probe in the flow, and side-scatter collection to produce a measuring volume 35 μm in diameter by 66 μm long. Data are presented for a two-dimensional boundary layer, demonstrating the instrument’s ability to measure Reynolds shear stresses as close to the wall as 0.1 mm, or y +≈3.

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Authors and Affiliations

  1. Department of Aerospace and Mechanical Engineering, Boston University, 110 Cummington Street, Boston, MA 02215, USA, , , , , , US

    D. A. Compton

  2. Thermosciences Division, Department of Mechanical Engineering, Stanford University, Stanford CA 94305-3030, USA, , , , , , US

    J. K. Eaton

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  1. D. A. Compton
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  2. J. K. Eaton
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Received: 6 October 1995/Accepted: 9 April 1996

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Compton, D., Eaton, J. A high-resolution laser Doppler anemometer for three-dimensional turbulent boundary layers. Experiments in Fluids 22, 111–117 (1996). https://doi.org/10.1007/s003480050028

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  • DOI: https://doi.org/10.1007/s003480050028

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