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Developments in Laser Techniques and Fluid Mechanics pp 181–202Cite as

Effective Size of the Measuring Cross-Section of a Phase-Doppler Anemometry

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Abstract

The paper presents a technique for measuring particle mass flux in dispersed two-phase flows with improved accuracy of mass flux measurements by a standard phase-Doppler anemometer (PDA) with an AID converter-based signal processor. The purpose was achieved by improved estimation of the effective area of the probe volume. The area of probe volume was calculated by a geometrical optics approximation after considering two major influences namely ‘trajectory ambiguity’ and ‘slit effect’. The calculation results showed that the effective measuring area in the present optical configuration can be determined as a simple function of the probe diameter, size of the spatial filter of the receiving optics and particle diameter by considering only refracted light when ‘phase validation’ is applied. In addition careful setting of the trigger level of the signal processor resulted in reducing number of rejected signals owing to low signal to noise ratio (SNR) within the defined effective measuring area and as a consequence the accuracy of mass flux measurement was improved by 15% compared with our earlier work. The flux measurement of a hollow-cone spray indicated that the error did not exceed 20%, at a volume fraction of 2 × 10−4%

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223, Japan

    T. Maeda, H. Morikita, K. Hishida & M. Maeda

Authors
  1. T. Maeda
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  2. H. Morikita
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  3. K. Hishida
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  4. M. Maeda
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Editor information

Editors and Affiliations

  1. Dept. of Theoretical and Applied Mechanics, University of Illinois at Urbana — Champaign, 61801, Urbana, Illinois, USA

    R. J. Adrian

  2. Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1096, Lisboa Codex, Portugal

    D. F. G. Durão

  3. Lehrstuhl für Strömungsmechanik, University of Erlangen — Nuremberg, Cauerstraße 4, 91058, Erlangen, Germany

    F. Durst

  4. Dept. of Mechanical Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1096, Lisboa Codex, Portugal

    M. V. Heitor

  5. Dept. of Mechanical Engineering, Keio University, 1-14-1 Hiyoshi, 223, Kohuku Yokohama, Japan

    M. Maeda

  6. Imperial College of Science, Technology and Medicine, Dept. of Mechanical Engineering, Exhibition Road, SW 7 2BX, London, England

    J. H. Whitelaw

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© 1997 Springer-Verlag Berlin Heidelberg

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Maeda, T., Morikita, H., Hishida, K., Maeda, M. (1997). Effective Size of the Measuring Cross-Section of a Phase-Doppler Anemometry. In: Adrian, R.J., Durão, D.F.G., Durst, F., Heitor, M.V., Maeda, M., Whitelaw, J.H. (eds) Developments in Laser Techniques and Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60911-4_12

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  • DOI: https://doi.org/10.1007/978-3-642-60911-4_12

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64604-1

  • Online ISBN: 978-3-642-60911-4

  • eBook Packages: Springer Book Archive

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