International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Towed underwater PIV measurement for free-surface effects on turbulent wake of a surface-piercing body

  • Seol, Dong Myung (Defense Acquisition Program Administration) ;
  • Seo, Jeong Hwa (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Rhee, Shin Hyung (Department of Naval Architecture and Ocean Engineering, Research Institute of Marine Systems Engineering, Seoul National University)
  • Published : 2013.09.30
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Abstract

In the present study, a towed underwater particle image velocimetry (PIV) system was validated in uniform flow and used to investigate the free-surface effects on the turbulent wake of a simple surface-piercing body. The selected test model was a cylindrical geometry formed by extruding the Wigley hull's waterplane shape in the vertical direction. Due to the constraints of the two-dimensional (2D) PIV system used for the present study, the velocity field measurements were done separately for the vertical and horizontal planes. Using the measured data at several different locations, it was possible to identify the free-surface effects on the turbulent wake in terms of the mean velocity components and turbulence quantities. In order to provide an accuracy level of the data, uncertainty assessment was done following the International Towing Tank Conference standard procedure.

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References

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  1. Uncertainty Assessment of a Towed Underwater Stereoscopic PIV System vol.51, pp.4, 2014, https://doi.org/10.3744/SNAK.2014.51.4.311