Community Research and Development Information Service - CORDIS

Optimal phase control of oscillating water columns

Research has been carried out with respect to the optimal phase control of an oscillating water column (OWC) equipped with a linear air turbine. The theory is based on Pontryaguin's Maximum Principle, and takes into account the air compressibility as well as turbine losses. Numerical results were computed for an OWC, of 2-dimensional idealized geometry, for which analytical expressions are available for the hydrodynamic coefficient of radiation.

Numerical results were computed and shown to illustrate the advantages of phase controlling an OWC device in both regular and irregular waves. Due to numerical difficulties, a closely related problem rather than the original problem was solved, which gives a suboptimal solution. It was found that the most adequate turbine for a phase controlled device does not necessarily maximize the energy produced if the device is not controlled.

Reported by

Instituto Nacional de Engenharia e Tecnologia Industrial
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