Loading Characteristics on Front Wall of Multi-Chamber OWC with Oblique Wave Incidence
The front wall of an oscillating water column(OWC)wave energy convertor is subjected to a huge wave load under the action of the ocean's dynamic environment.For a new type of oblique wave incident multi-chamber oscillating water column(MCOWC)device,the loading characteristics of the front wall of the device were investigated.A numerical model of the interaction between waves and the MCOWC device was established,and the existing data verifies the model's reliability.Based on the numerical model,the loading characteristics of the front wall of the device were analyzed,and the overall distribution of the pressure and compressive force on the inner and outer front wall of the gas chamber under different cycles was investigated.The results show that the inner side of the front wall is subjected to a greater horizontal load than the outer side;the nonlinear effect on the inner side of the chamber is more obvious at smaller periods than at larger periods.Under the wave action with a wave steepness parameter of 2.45,the maximum value of relative pressure on the wave-facing surface of the front wall of the front air chamber is reduced by about 62%compared with that of the conventional single-chamber OWC device,whereas that of the rear chamber is reduced by about 35%compared with that of the conventional single-chamber OWC device.The slanting-wave incidence MCOWC device can effectively reduce the loading effect of the incoming wave on the front wall of the OWC air chamber.
wave energy converternumerical modelhydrodynamic loadoblique wave incidence
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