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Article Experimental Investigation of Hydrodynamic Characteristics of a Moored Floating WEC
Author(s) L. Johanning, P. Kirrane, R. Alcorn, T. Lewis, W. Sheng (ICOE 2010)
Tags Wave energy converter, Oscillating Water Column, Floating structure, Hydrodynamic, Hydrodynamics, Survivability
Type Papers
File Experimental Investigation of Hydrodynamic Characteristics of a Moored Floating WEC

Abstract: This paper presents an experimental investigation on a backward bent duct buoy, a floating oscillating water column (OWC) in the wave basin. This wave energy converter is a 1:20 scaled model to the sea trial OE Buoy in Galway Bay. The physical modelling aims to model the device in a complete mooring setup. As a part of the FP7 CORES project (Grant No. 213633), the wave tank test services following main purposes:

  • Understand the hydrodynamics of the floating device in waves.
  • Collect test data in well-controlled condition for calibration and validation of numerical simulation.
  • Explore the survivability of the device under extreme conditions.

To achieve purposes, the experimental research includes:

  1. free decay/stiffness tests for the natural frequency and damping coefficients of the system;
  2. free floating model tests for comparison of motions to hydrodynamic analysis;
  3. conventional regular and irregular wave tests in which the test time series, first-order response amplitude operators (RAOs) and second-order responses are all given; and
  4. the tests in extreme conditions for testing the survivability of the device, mooring system and umbilical cable. 


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