Numerical and experimental studies on the hydrodynamic performance of a composite cylindrical perforated-wall caisson breakwater

被引:0
作者
Xia, Zi-bo [1 ]
Wang, Xin-yu [1 ]
Liu, Xiao [1 ]
Jin, Rui-jia [2 ]
Geng, Bao-lei [2 ]
Liu, Yong [1 ]
机构
[1] Ocean Univ China, Shandong Prov Key Lab Ocean Engn, Qingdao 266100, Peoples R China
[2] Tianjin Res Inst Water Transport Engn, Natl Engn Lab Port Hydraul Construct Technol, Tianjin 300456, Peoples R China
关键词
Composite cylindrical perforated-wall caisson; Hydrodynamic performance; Wave reflection; Wave forces; Shapes of perforated wall; OBLIQUE INCIDENT WAVES; IRREGULAR WAVES; REFLECTION; DESIGN; SIMULATION; LOADS; MODEL;
D O I
10.1016/j.oceaneng.2025.120385
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
This study examines the hydrodynamic performance of a new caisson-type breakwater, characterizing a composite cylindrical perforated-wall caisson (CCPC) that significantly suppresses the wave energy reflection and reduces wave forces. A comprehensive numerical analysis of the interaction between waves and the caisson breakwater was conducted using a 3-D numerical wave flume established with OpenFOAM (R). For validating the numerical model, experimental tests were conducted to measure the free surface elevations during waves interacting with the CCPC. The effects of different front wall shapes of caissons on hydrodynamic performance in terms of free surface elevations and flow fields at the joint were illustrated. Subsequently, the effects of structural parameters, the relative wave chamber width and porosity, on the hydrodynamic performance of the caisson were illustrated by investigating free surface elevations, velocity vectors, vorticity map, and wave pressure distributions. An empirical formula for predicting the reflection coefficient of the CCPC was proposed. Moreover, to estimate the stability of the breakwater, the wave forces acting on components of the CCPC were contrastively analyzed. The results suggest that the caisson, characterized by a rhythmic shape of the front wall, effectively dissipates wave energy while maintaining structural stability.
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页数:17
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