Experimental Investigation on Wave Dissipation of Perforated Pipe Breakwater Under Regular Wave Conditions
The permeable breakwater is an innovative, eco-friendly coastal protection structure that reduces wave impact while minimizing “dead water” and environmental harm. This study introduces a perforated pipe breakwater design with an increasing pipe diameter from top to bottom, evaluated through physica...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-11-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/12/12/2137 |
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| Summary: | The permeable breakwater is an innovative, eco-friendly coastal protection structure that reduces wave impact while minimizing “dead water” and environmental harm. This study introduces a perforated pipe breakwater design with an increasing pipe diameter from top to bottom, evaluated through physical model tests using transmission coefficient <i>K<sub>t</sub></i> and reflection coefficient <i>K<sub>r</sub></i> serving as the primary parameters. The results indicate that <i>K<sub>t</sub></i> decreases as the relative width (<i>B</i>/<i>L</i>), wave steepness (<i>H</i>/<i>L</i>), and relative water depth (<i>h</i>/<i>L</i>) increase, but rises with a steeper breakwater slope. When <i>B</i>/<i>L</i> exceeds 0.3, <i>H</i>/<i>L</i> surpasses 0.06, or the <i>h</i>/<i>L</i> ratio is greater than 0.3, <i>K<sub>t</sub></i> gradually declines until reaching a stable state, resulting in a more pronounced wave reduction. As <i>B</i>/<i>L</i> and <i>H</i>/<i>L</i> increase, the coefficient <i>K<sub>r</sub></i> initially drops, then rises. The slope ratio of 1:1.5 demonstrates the most effective wave energy dissipation, with primary dissipation occurring on the front slope. The mixed pipe diameter design shows superior wave absorption over a uniform diameter. Compared to a porous horizontal plate, the perforated pipe breakwater exhibits better wave absorption. These findings offer valuable guidance for designing eco-friendly coastal protection projects. |
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| ISSN: | 2077-1312 |