Abstract
Criteria are established for the Fourier cosine transformation data-reduction technique to be a valid procedure in the analysis of photon correlation data. It is shown that if there are many fringes in the focal volume, and more importantly, if the parameter β (=2 π 2 (σ/U r/s)2), linking the number of fringes to the turbulence intensity, is large, precise knowledge of the beam profile characteristics is not required. Practical problems associated with the implementation of the Fourier transformation technique are discussed. Measurements have been made in a turbulent jet mixing layer over a range of local intensities from 4% to 100%. Photon correlation data analysed by Fourier transform are compared with hot-wire and pulsed-wire data.
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References
J B Abbiss: Physica Scripta, 19, 388 (1979)
J G McWhirter: Optica Acta, 28, 1453 (1981)
L J S Bradbury: Physica Scripta, 19, 360 (1979)
J B Abbiss: PhD Thesis, Department of Mechanical Engineering, University of Surrey (1982)
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© 1983 Springer-Verlag Berlin Heidelberg
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Inman, P.N., Bradbury, L.J.S. (1983). Examples of the Data Reduction of Photon Correlation Laser Doppler Anemometer Autocorrelation Functions Using Fourier Transforms. In: Schulz-DuBois, E.O. (eds) Photon Correlation Techniques in Fluid Mechanics. Springer Series in Optical Sciences, vol 38. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39493-8_4
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DOI: https://doi.org/10.1007/978-3-540-39493-8_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-13529-7
Online ISBN: 978-3-540-39493-8
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