Performance evaluation of a semicircular breakwater with truncated wave screens

A semicircular breakwater model with rectangular perforations and with truncated wave screen(s) of different porosities has been developed in this study which could act as an anti-reflection wave barrier, providing wave protection to coastal and marine infrastructures. The hydrodynamic performance of the breakwater model is evaluated through wave measurements in a wave flume under irregular waves. The experiments are undertaken with three setups; (i) a wave screen is attached to the front curved wall of the semicircular breakwater and none at the rear wall, (ii) a wave screen is attached at the rear curved wall of the semicircular breakwater and none at the front wall and (iii) wave screens one each is attached to the front and rear walls of the semicircular breakwater. The wave surface elevations are measured at different locations upstream and downstream of the breakwater model and the coefficients of wave transmission, reflection and energy dissipation are determined. Wave climate in the vicinity of the breakwater and the horizontal wave force on the model are also measured and analyzed. The results show that the semicircular breakwater with double screens of 25% porosity is the most viable design that offers reasonably good hydraulic performance as this acts as an energy dissipater rather than a wave reflector. Further, empirical models developed using a multi-regression method for estimation of reflection, transmission and energy loss coefficients as well as the normalized wave force coefficients, correlates well with the experimental data.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2013.05.035
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801813002394
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Teh, Hee Min
  • Venugopal, Vengatesan
• Publication Date: 2013-9-15

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Glossary; References; Tables;
• Pagination: pp 160-176
• Serial:
  • Ocean Engineering
  • Volume: 70
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Breakwaters; Dissipation; Experiments; Ocean engineering; Porosity; Water waves
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; I70: Traffic and Transport;

Filing Info

• Accession Number: 01489363
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 2013 11:54AM