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Model Testing - What is the point? A review of yacht testing and the implications for yacht designers

Citation

Hutchison, C and Binns, J and Duffy, J and Brandner, P, Model Testing - What is the point? A review of yacht testing and the implications for yacht designers, Proceedings of the 4th International High Performance Yacht Design Conference, 12-14 March 2012, Auckland, New Zealand, pp. 119-125. ISBN 978-1-905040-97-1 (2012) [Refereed Conference Paper]

Copyright Statement

Copyright 2012 High Performance Yacht Design Conference (HPYD)

Official URL: http://www.hpyd.org.nz/hpyd4.aspx

Abstract

With the ever evolving design space, the need for quality data for designers has never been more important. To realize this need, designers typically tum to one of two techniques either: experimental fluid dynamics, typically using either towing tank or wind tunnel testing; or computational fluid dynamics. It is becoming increasingly easy, especially with the ever increasing power of computers and the visually attractive output, to take the decision to undertake computational fluid dynamics analyses. Whilst on the surface this may seem an easy decision to make, certainly easier than to undertake towing tank tests, there are some strong arguments to suggest that simply undertaking a computational fluid dynamics analysis as an a-priori solution is not without problems or dangers.

Extrapolation of experimental fluid dynamics drag results to full-scale for marine craft has traditionally involved attributing components of the total force to "viscous" and "inviscid" regimes. These components are then scaled with the Reynolds and Froude numbers respectively using a zero Froude number extrapolation to separate the two. However, this division of forces does not correlate exactly with shear and normal pressures on a body due to fluid flow, which sum to give drag. Nor can each of the "viscous" and "inviscid" components be attributed to strictly Reynolds and Froude number dependent effects, respectively.

Item Details

Item Type:Refereed Conference Paper
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Naval Architecture
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Water Transport not elsewhere classified
Author:Hutchison, C (Mr Chris Hutchison)
Author:Binns, J (Associate Professor Jonathan Binns)
Author:Duffy, J (Dr Jonathan Duffy)
Author:Brandner, P (Professor Paul Brandner)
ID Code:78651
Year Published:2012
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2012-07-16
Last Modified:2016-09-30
Downloads:3 View Download Statistics

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