The University of Southampton
University of Southampton Institutional Repository

Comparisons of CFD simulations and in-service data for the self propelled performance of an Autonomous Underwater Vehicle

Phillips, A.B., Turnock, S.R. and Furlong, M. (2008) Comparisons of CFD simulations and in-service data for the self propelled performance of an Autonomous Underwater Vehicle At 27th Symposium of Naval Hydrodynamics. 05 - 10 Oct 2008. 15 pp.

Record type: Conference or Workshop Item (Paper)

Abstract

A blade element momentum theory propeller model is coupled with a commercial RANS solver. This allows the fully appended self propulsion of the autonomous underwater vehicle Autosub 3 to be considered. The quasi-steady propeller model has been developed to allow for circumferential and radial variations in axial and tangential inflow. The non-uniform inflow is due to control surface deflections and the bow-down pitch of the vehicle in cruise condition. The influence of propeller blade Reynolds number is included through the use of appropriate sectional lift and drag coefficients. Simulations have been performed over the vehicles operational speed range (Re = 6.8 × 106 to 13.5 × 106). A workstation is used for the calculations with mesh sizes up to 2x106 elements. Grid uncertainty is calculated to be 3.07% for the wake fraction. The initial
comparisons with in service data show that the coupled RANS-BEMT simulation under predicts the drag of the vehicle and consequently the required propeller rpm. However, when an appropriate correction is made for the effect on resistance of various protruding sensors the predicted propulsor rpm matches well with that of in-service rpm measurements for vessel speeds (1m/s - 2m/s). The developed analysis captures
the important influence of the propeller blade and hull Reynolds number on overall system efficiency.

PDF PhillipsABV3.pdf - Author's Original
Download (7MB)

More information

Published date: 5 October 2008
Venue - Dates: 27th Symposium of Naval Hydrodynamics, 2008-10-05 - 2008-10-10
Keywords: auv, self-propulsion, cfd
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 63499
URI: http://eprints.soton.ac.uk/id/eprint/63499
PURE UUID: 4dc7f450-2b93-4a63-a3c0-663e37aaaf43
ORCID for S.R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 15 Oct 2008
Last modified: 17 Jul 2017 14:16

Export record

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.

×