The University of Southampton
University of Southampton Institutional Repository

A wind tunnel study of the mean airflow around a simple representation of a merchant ship

A wind tunnel study of the mean airflow around a simple representation of a merchant ship
A wind tunnel study of the mean airflow around a simple representation of a merchant ship
An investigation has been carried out to measure mean velocities above a solid block located in a wind tunnel. A Particle Image Velocimetry (PIV) system was used. The purpose of the investigation was to quantify the change in the mean flow speed caused by the bluff body and hence to determine the possible bias in wind speed measurement made from anemometers located above the superstructure of merchant ships. Possible sources of experimental error were investigated and resulted in; a) a blockage ratio correction which varied with position, b) the use of 2-dimensional maps of the free stream flow to obtain reference velocities and c) an estimate of a residual bias of up to 4 % in the PIV wind speed data. The wind speed was accelerated by up to 28 % compared to the free stream (or undistorted) wind speed. Close to the top of the block the wind speed is severely decelerated and the airflow reverses in direction. There was no dependence of either the pattern of the flow or of the magnitude of the wind speed bias on changes in wind directions of up to 30 degrees.
87
Southampton Oceanography Centre, University of Southampton
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Molland, A.F.
917272d0-ada8-4b1b-8191-1611875ef9ca
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07
Moat, B.I.
497dbb18-a98f-466b-b459-aa2c872ad2dc
Molland, A.F.
917272d0-ada8-4b1b-8191-1611875ef9ca
Yelland, M.J.
3b2e2a38-334f-430f-b110-253a0a835a07

Moat, B.I., Molland, A.F. and Yelland, M.J. (2004) A wind tunnel study of the mean airflow around a simple representation of a merchant ship (Southampton Oceanography Centre Research and Consultancy Report, 87) Southampton, UK. Southampton Oceanography Centre, University of Southampton 21pp.

Record type: Monograph (Project Report)

Abstract

An investigation has been carried out to measure mean velocities above a solid block located in a wind tunnel. A Particle Image Velocimetry (PIV) system was used. The purpose of the investigation was to quantify the change in the mean flow speed caused by the bluff body and hence to determine the possible bias in wind speed measurement made from anemometers located above the superstructure of merchant ships. Possible sources of experimental error were investigated and resulted in; a) a blockage ratio correction which varied with position, b) the use of 2-dimensional maps of the free stream flow to obtain reference velocities and c) an estimate of a residual bias of up to 4 % in the PIV wind speed data. The wind speed was accelerated by up to 28 % compared to the free stream (or undistorted) wind speed. Close to the top of the block the wind speed is severely decelerated and the airflow reverses in direction. There was no dependence of either the pattern of the flow or of the magnitude of the wind speed bias on changes in wind directions of up to 30 degrees.

Text
R&C-87.pdf - Other
Download (924kB)

More information

Published date: 2004

Identifiers

Local EPrints ID: 23057
URI: http://eprints.soton.ac.uk/id/eprint/23057
PURE UUID: 4f250249-202e-45b7-a249-ce7e541aa238

Catalogue record

Date deposited: 03 Apr 2006
Last modified: 15 Mar 2024 06:43

Export record

Contributors

Author: B.I. Moat
Author: A.F. Molland
Author: M.J. Yelland

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.

×