Numerical simulation of wave dissipation characteristics of permeable submerged breakwater under focused wave

Xu Yaoyao; Qu Ke; Huang Jingxuan; Lan Gangyun; Liu Tiewei; Wen Bohao

doi:10.12284/hyxb2022127

Volume 44 Issue 11

Nov. 2022

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Xu Yaoyao，Qu Ke，Huang Jingxuan, et al. Numerical simulation of wave dissipation characteristics of permeable submerged breakwater under focused wave[J]. Haiyang Xuebao，2022, 44(11)：121–132 doi: 10.12284/hyxb2022127

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Numerical simulation of wave dissipation characteristics of permeable submerged breakwater under focused wave

doi: 10.12284/hyxb2022127

Xu Yaoyao^1
,,
Qu Ke^{1, 2, 3
,
,},
Huang Jingxuan¹,
Lan Gangyun¹,
Liu Tiewei¹,
Wen Bohao¹

1.
School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
2.
Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
3.
Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China

Received Date: 2021-10-02
Rev Recd Date: 2022-05-23

Available Online: 2022-10-18

Publish Date: 2022-11-03

Abstract

Abstract

Based on the non-hydrostatic numerical calculation model, this paper systematically studies the wave dissipation characteristics of permeable submerged breakwater under the impact of focused wave. By setting reasonable calculation conditions, the effects of wave height, water depth above the submerged breakwater, spectral peak period, porosity and the crest width of submerged breakwater on the wave dissipation characteristics of permeable submerged breakwater are analyzed in detail. At the same time, the calculation results of permeable submerged breakwater are compared with those of impermeable submerged breakwater. The calculation results show that the attenuation effect of permeable submerged breakwater on focused wave is stronger than that of impermeable submerged breakwater, which shows that permeable submerged breakwater can more effectively reduce the impact of freak wave on coastal infrastructure; wave height and the water depth above the submerged breakwater are important factors affecting the wave dissipation characteristics of submerged breakwater. With the increase of incident wave height and the decrease of the water depth above the submerged breakwater, the wave dissipation effect of permeable submerged breakwater increases gradually. The permeable submerged breakwater has poor wave dissipation effect on large-spectrum peak period waves. Within the range of porosity considered in this paper, as the porosity increases, the wave dissipation effect of permeable submerged breakwater is better; when the porosity is 0.4 and the crest width is 0.6125 m, the permeable submerged breakwater can reduce 54% of the incident wave energy, which is 36.1% higher than that of the impermeable submerged breakwater. The research results of this paper can provide corresponding reference for further understanding the wave dissipation characteristics of permeable submerged breakwater and the design of coastal protection engineering.
- focused wave,
- permeable submerged breakwater,
- wave attenuation,
- wave energy dissipation,
- non-hydrostatic model

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References(43)

References

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