Transactions of the Visualization Society of Japan
Online ISSN : 1346-5260
ISSN-L : 1346-5252
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Volume 35, Issue 4
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  • Combined Measurement of Unsteady Pressure and Vorticity Fields of the Flow around a Cylinder by PSP and PIV
    Yuji NOMURA, Masaharu KAMEDA, Kazuyuki NAKAKITA, Hiroyuki KATO, Shunsu ...
    2015 Volume 35 Issue 4 Pages 1-6
    Published: 2015
    Released on J-STAGE: April 30, 2015
    DOIhttps://doi.org/10.3154/tvsj.35.1
    JOURNAL FREE ACCESS
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    A combined measurement of velocity field and surface pressure distribution around a two-dimensional cylinder in a low-speed wind tunnel was conducted using unsteady pressure-sensitive paint (PSP) and time-resolved particle image velocimetry (PIV). We measured pressure fluctuation on the surface of the cylinder as well as spatial distribution of the vorticity fluctuation behind the cylinder. Then we calculated the spatial distribution of coherence for surface pressure and vorticity. Finally, we determined characteristic decay length of coherence in spanwise direction of the cylinder. We obtained good agreement between the characteristic lengths determined by surface pressure and by vorticity. This agreement implies that the unsteady PSP is potentially a good tool for aeroacoustic analysis.
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