Wave-induced uprush jet velocity on a vertical structure

Dogan Kisacik, Gulizar Ozyurt Tarakcioglu, Peter A Troch

Research output: Contribution to journalArticle

Abstract

A vertical wall with an overhanging horizontal cantilever slab was tested in a small-scale test setup (with a scale of 1:20) under wave impact (impulsive) loads. A single breaking wave creates two distinct sequential impacts on the vertical and horizontal parts of the cantilever. The breaking wave jet hits on the vertical wall then rises with an uprush jet velocity and creates the second impact on the horizontal cantilever. This upward water momentum depends on the uprush jet velocity. In this study, data from pressure sensors was used to analyze the average uprush jet velocity (uv_av) under regular breaking waves. A formula to predict the average uprush jet velocity on a vertical structure is proposed. Wave height at the toe of the foreshore (H1), water depth at the structure toe (hs), and wave period (T) were found to be the main parameters governing the average uprush jet velocity. In addition, the influence of geometric properties such as clearance between still water level and horizontal part of the cantilever (c) were analyzed. The proposed formula is applicable within the range 0.45≤H1/hs≤1.2, 2.0s≤T≤2.8s and 0.75m≤hs≤1.65m.

Original languageEnglish (US)
Pages (from-to)103-113
Number of pages11
JournalOcean Engineering
Volume127
DOIs
Publication statusPublished - Nov 15 2016
Externally publishedYes

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Keywords

  • Impact pressure and force
  • Uprush jet velocity
  • Vertical walls

ASJC Scopus subject areas

  • Environmental Engineering
  • Ocean Engineering

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