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The Royal Institute of Naval Architects

Delner Brakes Oct 2018

US Coast Guard

IJME 201

Paper Title: Subcritical Wave Wake Unsteadiness

 

Authors

A Robbins, G A Thomas, M R Renilson and G J Macfarlane, Australian Maritime College, Australia
I W Dand, BMT Isis, UK 

Summary

Vessel wave wake in deep water is well understood, shallow water less so, specifically the effect of restricted water. This operational zone is highly dynamic and non-linear in nature, thus being worthy of closer examination. The paper reviews the primary mechanisms for unsteadiness in wave wake: starting acceleration and soliton generation. A comprehensive set of experiments was conducted using an NPL catamaran hull form to investigate unsteadiness in both wave height and wave angle. The results show that the unsteadiness was primarily due to soliton generation, and that blockage has a significant effect.  As a result, additional metrics, aimed at defining shallow water effects in the transcritical region, are proposed.

Reference

Transactions RINA, Vol 153, Part A3, International Journal Maritime Engineering, Jul-Sep 2011

DOI Number

DOI No: 10.3940/rina.ijme.2011.a3.201

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