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Wave-piercing catamaran transom stern ventilation process

Citation

Haase, M and Binns, J and Thomas, G and Bose, N, Wave-piercing catamaran transom stern ventilation process, Ship Technology Research, 63, (2) pp. 71-80. ISSN 0937-7255 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 University of Duisburg-Essen

DOI: doi:10.1080/09377255.2015.1119922

Abstract

The new class of highly fuel-efficient medium-speed catamarans operate at speeds where the transom is partially or fully ventilated, hence it is important to understand the characteristics of the wake for resistance prediction. Unsteady Reynolds-Averaged Navier Stokes simulations were used to simulate the flow around a 98 m catamaran, at both model and full scale, and compared to model test results for a 1:22 scale model. A non-shedding squashed horseshoe vortex was found to build up in the stagnant zone past the vessel, with the transom running dry at transom draft Froude numbers of 2.5 in model test experiments and at transom draft Froude numbers of 2.4 in numerical simulations. For full-scale Reynolds numbers, ventilation occurred at transom draft Froude numbers of 2.2. Finally, unsteady Reynolds-Averaged Navier Stokes simulations are capable of accurately predicting the recirculating flow in the wake of the vessel and the state of transom ventilation.

Item Details

Item Type:Refereed Article
Keywords:ship hydrodynamics, computational fluid dynamics, transom ventilation, wave-piercing catamaran, medium-speed catamaran, unsteady RANS simulation, full-scale CFD, flow visualisation
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Naval Architecture
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Coastal Sea Freight Transport
Author:Haase, M (Dr Max Haase)
Author:Binns, J (Associate Professor Jonathan Binns)
Author:Bose, N (Professor Neil Bose)
ID Code:110795
Year Published:2016
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2016-08-15
Last Modified:2017-11-01
Downloads:0

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