HYDRODYNAMIC PERFORMANCE OF A FREE SURFACE SEMICIRCULAR PERFORATED BREAKWATER
Proceedings of the 32nd International Conference
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Keywords

semicircular breakwater
wave transmission
wave reflection
energy dissipation
wave force

How to Cite

Teh, H. M., Venugopal, V., & Bruce, T. (2011). HYDRODYNAMIC PERFORMANCE OF A FREE SURFACE SEMICIRCULAR PERFORATED BREAKWATER. Coastal Engineering Proceedings, 1(32), structures.20. https://doi.org/10.9753/icce.v32.structures.20

Abstract

The increasing importance of the sustainability challenge in coastal engineering has led to the development of free surface breakwaters of various configurations. In this study, the hydrodynamic characteristics of a perforated semicircular free surface breakwater (SCB) are investigated for irregular wave conditions. The hydrodynamic performance of the breakwater is evaluated in the form of transmission, reflection and energy dissipation coefficients, which are then presented as a function of the relative submergence depth (D/d) and the relative breakwater width (B/Lp), where D = the depth of immersion, d = the water depth, B = the breakwater width and Lp = the wavelength corresponding to the peak wave period. It is found that the wave attenuation ability of the SCB model improves with the increase of D/d and B/Lp. The SCB performs better as an energy dissipater than as a wave reflector. Based on the analysis of measured data, some empirical equations are proposed to predict the performance of the breakwater under varying submergence depths. The behaviour of wave transformation around and within the breakwater's chamber is discussed. Also, the measured horizontal wave forces acting on the SCB are reported.
https://doi.org/10.9753/icce.v32.structures.20
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