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Low Reynolds number performance of a model scale t-foil
Citation
AlaviMehr, J and Davis, MR and Lavroff, J, Low Reynolds number performance of a model scale t-foil, International Journal of Maritime Engineering, 157, (Part A3) pp. A175-A187. ISSN 1479-8751 (2015) [Refereed Article]
Copyright Statement
Copyright 2015 Royal Institution of Naval Architects
Official URL: http://www.rina.org.uk/IJME_336.html
DOI: doi:10.3940/rina.ijme.2015.a3.336
Abstract
Submerged T-foils are an essential forward component of the ride control systems of high speed ferries. A model scale
T-Foil for a 2.5m towing tank model of a 112m INCAT Tasmania high-speed wave-piercer catamaran has been tested
for both static and dynamic lift performance. The tests were carried out using a closed-circuit water tunnel to investigate
the lift and drag characteristics as well as frequency response of the T-Foil. The model T-Foil operates at a Reynolds
number of approximately I05
, has an aspect ratio of 3.6 and a plan form which is strongly tapered from the inboard to
outboard end. All of these factors, as well as strut and pivot interference, influence the steady lift curve slope (deL) of the
da
model T-foil which was found to be 61% of the value for an ideal aerofoil with elliptic loading. The T-foil dynamic
performance was limited primarily by the stepper motor drive system and connection linkage. At the frequency of
maximum motion of the 2.5 m catamaran model (about 1.5Hz) the model T-foil has approximately 5% reduction of
amplitude and 15 degrees of phase shift relative to the low frequency response. Only very small limitations arose due to
the unsteady lift as predicted by the analysis of Theodorsen. It was concluded that the model scale T-foil performed
adequately for application to simulation of a ride control system at model scale.
Item Details
Item Type: | Refereed Article |
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Keywords: | catamaran, low Reynolds, model scale, t-foil, motion control |
Research Division: | Engineering |
Research Group: | Mechanical engineering |
Research Field: | Mechanical engineering not elsewhere classified |
Objective Division: | Transport |
Objective Group: | Water transport |
Objective Field: | Domestic passenger water transport (e.g. ferries) |
UTAS Author: | AlaviMehr, J (Dr Javad Mehr) |
UTAS Author: | Davis, MR (Professor Michael Davis) |
UTAS Author: | Lavroff, J (Dr Jason Ali-Lavroff) |
ID Code: | 102480 |
Year Published: | 2015 |
Web of Science® Times Cited: | 5 |
Deposited By: | Engineering |
Deposited On: | 2015-08-24 |
Last Modified: | 2017-11-03 |
Downloads: | 0 |
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