The University of Southampton
University of Southampton Institutional Repository

An investigation into the wave wash and wave resistance of high speed displacement ships

An investigation into the wave wash and wave resistance of high speed displacement ships
An investigation into the wave wash and wave resistance of high speed displacement ships

Experimental tests on models of high speed craft have been carried out in deep and shallow water. The models used were of round bilge form with transom sterns derived from the NPL and the Series 64 round bilge series. Longitudinal wave cuts, model total resistance, sinkage and trim were measured. The effects of length to displacement ratio (L/V), catamaran separation to length ratio (S/L), speed, transom immersion, shallow water and propulsion systems on wave wash and resistance were investigated. The data can be used directly for assessing the influence of the main hull parameters, speed and water depth, for the validation of theoretical wash prediction methods and for input into wave propagation models.

For the theoretical investigation, thin ship theory was used and developed in order to predict the wave pattern resistance and wave wash of slender hulls with transom sterns. In particular, the theory was extended to cover the supercritical speed range. The theoretical work included the investigation and use of transom stern corrections, establishment of a regression analysis of dynamic sinkage and trim and the investigation and use of the thin ship theory to estimate the wave profile around the hull. The theory was validated for the physical wave patterns and profiles, especially in shallow water and at supercritical speeds using the experimental results. The validation included the effects of hull form parameters, trim changes and depth Froude number on wave pattern resistance and wave profiles. It is found that numerical methods, based on the thin ship theory, can be satisfactorily employed as a simple and effective means of estimating wave pattern resistance and wave profiles with low computational effort.

University of Southampton
Chandraprabha, Sattaya
414654ee-b788-4f75-808f-24d95e79a7c5
Chandraprabha, Sattaya
414654ee-b788-4f75-808f-24d95e79a7c5

Chandraprabha, Sattaya (2003) An investigation into the wave wash and wave resistance of high speed displacement ships. University of Southampton, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

Experimental tests on models of high speed craft have been carried out in deep and shallow water. The models used were of round bilge form with transom sterns derived from the NPL and the Series 64 round bilge series. Longitudinal wave cuts, model total resistance, sinkage and trim were measured. The effects of length to displacement ratio (L/V), catamaran separation to length ratio (S/L), speed, transom immersion, shallow water and propulsion systems on wave wash and resistance were investigated. The data can be used directly for assessing the influence of the main hull parameters, speed and water depth, for the validation of theoretical wash prediction methods and for input into wave propagation models.

For the theoretical investigation, thin ship theory was used and developed in order to predict the wave pattern resistance and wave wash of slender hulls with transom sterns. In particular, the theory was extended to cover the supercritical speed range. The theoretical work included the investigation and use of transom stern corrections, establishment of a regression analysis of dynamic sinkage and trim and the investigation and use of the thin ship theory to estimate the wave profile around the hull. The theory was validated for the physical wave patterns and profiles, especially in shallow water and at supercritical speeds using the experimental results. The validation included the effects of hull form parameters, trim changes and depth Froude number on wave pattern resistance and wave profiles. It is found that numerical methods, based on the thin ship theory, can be satisfactorily employed as a simple and effective means of estimating wave pattern resistance and wave profiles with low computational effort.

Text
894661.pdf - Version of Record
Available under License University of Southampton Thesis Licence.
Download (5MB)

More information

Published date: 2003

Identifiers

Local EPrints ID: 464929
URI: http://eprints.soton.ac.uk/id/eprint/464929
PURE UUID: a620b0b1-e4f9-4d20-a2bd-9017889cf563

Catalogue record

Date deposited: 05 Jul 2022 00:11
Last modified: 16 Mar 2024 19:50

Export record

Contributors

Author: Sattaya Chandraprabha

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×