Wave Focusing Induced by a Submerged Crescent-Shaped Plate in Combination with Headland Breakwaters

As the rise in sea level becomes increasingly evident, various techniques to increase renewable energy production and reduce coastal erosion have become popular topics of study. In particular, interest has grown in varying geometries of submerged plates to focus waves and create reliable conditions for wave energy production. Through the principles of reflection, refraction, diffraction, and shoaling, these plates have been found to focus waves to specific locations. This study investigated wave focusing induced by a submerged crescent-shaped plate through a physical model experiment measuring wave transformation through a combined headland breakwater - focuser system. Through initial mapping of the wave height diffraction profile, we found that while wave attenuation occurred during early stages of propagation, constructive interference can be seen shoreward. By combining the concept of wave energy focusing and coastal protection methods such as headland breakwaters, experiments showed that the focal point of wave energy amplification was magnified due to the unique pattern of diffraction caused by the breakwaters. Through the combination of the two systems, wave energy converters (WECs) could be positioned in a more controlled environment while also helping to reduce shoreline erosion.