Amplification of ship generated wake wash due to coastal effects
Övrigt, 2003

This paper discusses the results from extensive wake wash measurements carried out with a model of a ROPAX ship passing a bay. The tests were carried out in SSPA 's sea-keeping and maneuvering basin. This model had been subjected to wash wave measurements in open water in previous tests, which gave possibilities for comparisons between restricted and unrestricted waters'. Six wave gauges were placed inside and outside the bay, and a significant drawdown was noticed in addition to amplifications of the Kelvin waves. The drawdown and the Kelvin waves that occurred in the bay are difficult to explain, but this paper makes an attempt to analyze the phenomena that occur. The different wave theories that can be used in this case are presented The methods that are used for analyzing the measured signals are described One conclusion that can be made is that drawdown caused by the Bernoulli wave can probably be considered a worse problem than ordinary wash waves (Kelvin waves) in restricted and especially shallow waters when looking at large displacement ships.

wake wash

ROPAX

measurements

bay

Författare

Björn Allenström

Andreasson H

Michael Leer-Andersen

Chalmers, Institutionen för marin teknik

D Li

Lars Bergdahl

Chalmers, Institutionen för Vatten Miljö Transport, Vågor och hydraulik

Ämneskategorier

Maskinteknik

Strömningsmekanik och akustik

Fundament

Grundläggande vetenskaper