Predicting motions of high-speed rigid inflatable boats: improved wedge impact prediction
Predicting motions of high-speed rigid inflatable boats: improved wedge impact prediction
Modelling the performance of high speed planing craft is
challenging. The inherent unsteady free surface flows are
complex to model numerically, resulting in computationally expensive predictions. Non-linear equations of motion are required to predict the movement of the vessel. Previous work used a strip theory that predicts the forces of wedge impact using a potential flow method. This work aims to improve this numerical model by increasing the accuracy of predicting the forces acting on a wedge during impact. A viscous two dimensional computational fluid dynamic analysis is used to compute the wedge impacts, and the results are compared with the potential flow method used in the original motions prediction solver. Results of the computational fluid dynamics predictions are also compared with experimental data. Overall, good agreement is found with the experimental results and the computed wedge impact prediction improves upon the 2D potential theory results.
377-383
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Lewis, S.G.
68605959-735b-4e84-9fb2-7f0bff6beddb
September 2007
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Lewis, S.G.
68605959-735b-4e84-9fb2-7f0bff6beddb
Hudson, D.A., Turnock, S.R. and Lewis, S.G.
(2007)
Predicting motions of high-speed rigid inflatable boats: improved wedge impact prediction.
The Ninth International Conference on Fast Sea Transportation (FAST2007), Shanghai, China.
22 - 26 Sep 2007.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Modelling the performance of high speed planing craft is
challenging. The inherent unsteady free surface flows are
complex to model numerically, resulting in computationally expensive predictions. Non-linear equations of motion are required to predict the movement of the vessel. Previous work used a strip theory that predicts the forces of wedge impact using a potential flow method. This work aims to improve this numerical model by increasing the accuracy of predicting the forces acting on a wedge during impact. A viscous two dimensional computational fluid dynamic analysis is used to compute the wedge impacts, and the results are compared with the potential flow method used in the original motions prediction solver. Results of the computational fluid dynamics predictions are also compared with experimental data. Overall, good agreement is found with the experimental results and the computed wedge impact prediction improves upon the 2D potential theory results.
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Published date: September 2007
Venue - Dates:
The Ninth International Conference on Fast Sea Transportation (FAST2007), Shanghai, China, 2007-09-22 - 2007-09-26
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 48849
URI: http://eprints.soton.ac.uk/id/eprint/48849
PURE UUID: 24784e48-ef95-418e-a19e-9025bc37eb15
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Date deposited: 16 Oct 2007
Last modified: 09 Jan 2022 02:47
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Contributors
Author:
S.G. Lewis
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