2024 Volume 80 Issue 17 Article ID: 24-17196
It is important to extract energy efficiently from irregular wave energy in wave power generation. In this study, to improve the power generation efficiency in the primary conversion of oscillating water column type wave power generation, hydraulic model experiments with irregular waves were conducted by installing a square cylinder simulating a power generation unit inside a wave-dissipating works formed by wave-dissipating blocks, and the characteristics of water level fluctuations inside the square cylinder were evaluated. The experimental cross sections were two cases, one with full-section covered type and the other with two-layer covered type, and wave height gauges were installed inside the square cylinder to measure water level fluctuations. Comparison of the waveforms between the incident waves and those inside the square cylinder showed that the short-period, low-height irregular waves were reduced inside the square cylinder, it was found that a low-pass filter effect of the wave-dissipating works. Comparison of the wave-forms between the incident waves and those inside the square cylinder showed that the short-period, low-height irregular waves were reduced inside the square cylinder, it was found that a low-pass filter effect of the wave-dissipating works. Comparison of wave spectral figures also confirmed the same effect. Comparison of the mean wave heights clarified that the vertical amplitude fluctuation in the square cylinder increased more than the incident wave height.
