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Hydrodynamic tests on a plate in forced oscillation


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Klaka, K, Penrose, JD, Horsley, RR and Renilson, MR 2007 , 'Hydrodynamic tests on a plate in forced oscillation' , Ocean Engineering, vol. 34, no. 8-9 , pp. 1225-1234 , doi: 10.1016/j.oceaneng.2006.06.009.

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The forces and moments acting on an oscillating plate at inflow angles at or below stall are well understood. However, there is a
shortage of data on surface-piercing plates undergoing rotational oscillation. A set of experiments was conducted on a series of flat plates
undergoing forced rotational oscillation in calm water. The impetus for the experiments was an investigation into the hydrodynamics of
sailing yacht keels, but the results may be of value for a wide range of engineering problems. The experiments showed that the twodimensional
case was not representative of three-dimensional flow conditions. There was a possible region of transitional flow for the
plate in two-dimensional flow, not evidenced in the results for three-dimensional flow. The total roll moment, roll inertia, roll drag and
sway force coefficients showed an inverse square root relationship to aspect ratio, with a very weak dependency on oscillation frequency
and angle amplitude. Under-plate clearance effects were small for the clearance values investigated.

Item Type: Article
Authors/Creators:Klaka, K and Penrose, JD and Horsley, RR and Renilson, MR
Journal or Publication Title: Ocean Engineering
ISSN: 0029-8018
DOI / ID Number: 10.1016/j.oceaneng.2006.06.009
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