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A simplified, flow-based calibration method for stereoscopic PIV

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Abstract

An improvement of the process of stereo-PIV calibration is presented. The central feature of the proposed technique is that the calibration of the stereoscopic system is based upon the measurement of a calibrated flow. This is achieved through an initial two-dimensional calibration of the measurement plane using a single target point, followed by a perspective and laser sheet thickness optimization that makes use of the measurement of a known reference flow, e.g., a uniform flow. This technique results in planar domain, three-component (2D–3C) measurements with a simpler calibration phase, which delivers uncompromised accuracy, compensates for the mechanical misalignment and eliminates the errors deriving from the classical target plate dot identification. The technique is particularly well suited for towing tanks and other large facilities, and is applied to the vortex system shed from an underwater bridge sail.

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Acknowledgments

The work was sponsored by the INSEAN 2007-2009 Research Program funded by Ministero dei Trasporti and by the European Network of Excellence “Hydrotesting Alliance (HTA)”. Dr G. Aloisio and Dr. M. Falchi are gratefully acknowledged for their contribution to the experiments.

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Authors and Affiliations

  1. INSEAN, Italian Ship Model Basin, Rome, 00128, Italy

    Silvano Grizzi, Francisco Pereira & Fabio Di Felice

Authors
  1. Silvano Grizzi
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  2. Francisco Pereira
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  3. Fabio Di Felice
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Correspondence to Francisco Pereira.

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Grizzi, S., Pereira, F. & Di Felice, F. A simplified, flow-based calibration method for stereoscopic PIV. Exp Fluids 48, 473–486 (2010). https://doi.org/10.1007/s00348-009-0750-2

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  • DOI: https://doi.org/10.1007/s00348-009-0750-2

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