The wave absorption efficiency of multi-layer vertical perforated thin plates

This paper analyzes the wave absorption efficiency of multi-layer perforated plates in an ideal fluid, based on the linear potential flow theory. The influence of the thickness, the porosity and the layout form of the plates on the wave absorptivity is studied on the assumption that all perforated p...

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Published in:Journal of hydrodynamics. Series B 2018-10, Vol.30 (5), p.898-907
Main Authors: Geng, Bao-lei, Wang, Rong-quan, Ning, De-zhi
Format: Article
Language:English
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Engineering
Engineering Fluid Dynamics
Hydrology/Water Resources
Numerical and Computational Physics
Simulation
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description This paper analyzes the wave absorption efficiency of multi-layer perforated plates in an ideal fluid, based on the linear potential flow theory. The influence of the thickness, the porosity and the layout form of the plates on the wave absorptivity is studied on the assumption that all perforated plates are composed of the same materials and have the same thickness and porosity. The calculation results indicate that the larger the number of layers of the perforated plate set, the better the wave absorption efficiency, however, when the layer number exceeds a certain value, the efficiency of the plates is not significantly increased. For the case of porosity ε = 0.2, thickness b = 0.07 m and 4 layers of perforated plates with a distance l =1.0m between the layers, 90% of the energy of the wave within the incident wave period between 1.6 s and 4.4 s can be absorbed.
doi_str_mv 10.1007/s42241-018-0103-9
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For the case of porosity ε = 0.2, thickness b = 0.07 m and 4 layers of perforated plates with a distance l =1.0m between the layers, 90% of the energy of the wave within the incident wave period between 1.6 s and 4.4 s can be absorbed.</description><identifier>ISSN: 1001-6058</identifier><identifier>EISSN: 1878-0342</identifier><identifier>DOI: 10.1007/s42241-018-0103-9</identifier><language>eng</language><publisher>Singapore: Springer Singapore</publisher><subject>Engineering ; Engineering Fluid Dynamics ; Hydrology/Water Resources ; Numerical and Computational Physics ; Simulation</subject><ispartof>Journal of hydrodynamics. Series B, 2018-10, Vol.30 (5), p.898-907</ispartof><rights>China Ship Scientific Research Center 2018</rights><rights>Copyright © Wanfang Data Co. Ltd. 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subjects Engineering
Engineering Fluid Dynamics
Hydrology/Water Resources
Numerical and Computational Physics
Simulation
title The wave absorption efficiency of multi-layer vertical perforated thin plates
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