On the tuning of a wave-energy driven oscillating-water-column seawater pump to polychromatic waves |
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| Authors: | Ramiro Godoy-Diana Steven PR Czitrom |
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| Institution: | aInstituto de Ciencias del Mar y Limnología (ICMyL), Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, 04510 México D.F., Mexico;bPhysique et Mécanique des Milieux Hétérogènes (PMMH), UMR 7636 CNRS; ESPCI; Univ. Paris6; Univ. Paris7, 10 rue Vauquelin, F-75231 Paris Cedex 05, France |
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| Abstract: | Performance of wave-energy devices of the oscillating water column (OWC) type is greatly enhanced when a resonant condition with the forcing waves is maintained. The natural frequency of such systems can in general be tuned to resonate with a given wave forcing frequency. In this paper we address the tuning of an OWC sea-water pump to polychromatic waves. We report results of wave tank experiments, which were conducted with a scale model of the pump. Also, a numerical solution for the pump equations, which were proven in previous work to successfully describe its behavior when driven by monochromatic waves, is tested with various polychromatic wave spectra. Results of the numerical model forced by the wave trains measured in the wave tank experiments are used to develop a tuning criterion for the sea-water pump. |
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| Keywords: | Wave energy Oscillating water column Pump Tuning Polychromatic waves Resonance |
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