TY - JOUR
TI - Wave generation by an oscillating surface-pressure and its application in wave-energy extraction
AU - Sarmento, A
AU - de O Falcao, A
T2 - Journal of Fluid Mechanics
AB -  A two-dimensional analysis, based on linear surface-wave theory, is developed for an oscillating-water-column wave-energy device in water of arbitrary constant depth. The immersed part of the structure is assumed of shallow draught except for a submerged vertical reflecting wall. Both the cases of linear and nonlinear power take-off are considered. The results show that air compressibility can be important in practice, and its effects may in general be satisfactorily represented by linearization. The analysis indicates that using a turbine whose characteristic exhibits a phase difference between pressure and flow rate may be a method of strongly reducing the chamber length and turbine size with little change in the capability of energy extraction from regular waves. It was found in two examples of devices with strongly nonlinear power take-off that the maximum efficiency is only marginally inferior to what can be achieved in the linear case.
DA - 1985/01//
PY - 1985
PB - Cambridge University Press
VL - 150
SP - 467
EP - 485
UR - https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/wave-generation-by-an-oscillating-surfacepressure-and-its-application-in-waveenergy-extraction/FDF8B5BF543D3E578D9EB342FB04D0A3
DO - 10.1017/S0022112085000234
LA - English
KW - Wave
KW - Oscillating Water Column
KW - Modeling
KW - Performance
ER -