Effect of under connected plates on the hydrodynamic efficiency of the floating breakwater |
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| Authors: | A S Koraim O S Rageh |
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| Institution: | 1. Water and Water Structure Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt
2. Irrigation and Hydraulics Department, Faculty of Engineering, El-Mansoura University, El-Mansoura, Egypt
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| Abstract: | In this paper, the hydrodynamic efficiency of a floating breakwater system is experimentally studied by use of physical models. Regular waves with wide ranges of wave heights and periods are tested. The efficiency of the breakwater is presented as a function of the wave transmission, reflection, and energy dissipation coefficients. Different parameters affecting the breakwater efficiency are investigated, e.g. the number of the under connected vertical plates, the length of the mooring wire, and the wave length. It is found that, the transmission coefficient k t decreases with the increase of the relative breakwater width B/L, the number of plates n and the relative wire length l/h, while the reflection coefficient k r takes the opposite trend. Therefore, it is possible to achieve k t values smaller than 0.25 and k r values larger than 0.80 when B/L is larger than 0.25 for the case of l/h=1.5 and n=4. In addition, empirical equations used for estimating the transmission and reflection coefficients are developed by using the dimensionless analysis, regression analysis and measured data and verified by different theoretical and experimental results. |
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| Keywords: | floating breakwaters vertical plates regular waves transmission reflection energy dissipation |
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