Periodic sampling in laser anemometry

I. Grant, C. A. Greated

    Research output: Contribution to journalArticle

    Abstract

    In the measurement of periodic fluid flows by laser anemometry, the velocities are often determined by sampling the Doppler signal at predetermined phase positions in the cycle. It is shown that the resulting intensity autocorrelation functions accumulated over many cycles are distorted by the sampling procedure. The form of this distortion is determined and verified experimentally. The application of a simple correction before the analysis of a correlogram is seen to greatly facilitate the measurement of mean velocities and turbulence level.

    Original languageEnglish
    Article number025
    Pages (from-to)571-574
    Number of pages4
    JournalJournal of Physics E: Scientific Instruments
    Volume13
    Issue number5
    DOIs
    Publication statusPublished - 1980

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    velocity measurement
    sampling
    cycles
    autocorrelation
    fluid flow
    lasers
    turbulence

    Cite this

    Grant, I. ; Greated, C. A. / Periodic sampling in laser anemometry. In: Journal of Physics E: Scientific Instruments. 1980 ; Vol. 13, No. 5. pp. 571-574.
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    Periodic sampling in laser anemometry. / Grant, I.; Greated, C. A.

    In: Journal of Physics E: Scientific Instruments, Vol. 13, No. 5, 025, 1980, p. 571-574.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Periodic sampling in laser anemometry

    AU - Grant, I.

    AU - Greated, C. A.

    PY - 1980

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    AB - In the measurement of periodic fluid flows by laser anemometry, the velocities are often determined by sampling the Doppler signal at predetermined phase positions in the cycle. It is shown that the resulting intensity autocorrelation functions accumulated over many cycles are distorted by the sampling procedure. The form of this distortion is determined and verified experimentally. The application of a simple correction before the analysis of a correlogram is seen to greatly facilitate the measurement of mean velocities and turbulence level.

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