A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems
A two-dimensional Boundary Element Method (BEM) is developed to study the strongly nonlinear interaction between a surface-piercing body and the free-surface. The scheme is applied to problems with and without the possibility of ventilation resulting from the motion and geometric configuration of th...
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ndltd-UTEXAS-oai-repositories.lib.utexas.edu-2152-147652015-09-20T17:05:26ZA Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problemsVinayan, VimalPropellersSurface-piercing propellersNumerical methodsBoundary Element MethodNonlinear interactionPerformance predictionFree-surfaceFlow modelMathematical modelsHull sectionsA two-dimensional Boundary Element Method (BEM) is developed to study the strongly nonlinear interaction between a surface-piercing body and the free-surface. The scheme is applied to problems with and without the possibility of ventilation resulting from the motion and geometric configuration of the surface-piercing body. The main emphasis of this research work is on the development of numerical methods to improve the performance prediction of surface-piercing propellers by including the whole range of free-surface nonlinearities. The scheme is applied to predict the ventilated cavity shapes resulting from the vertical and rotational motion of a blade-section with fully nonlinear free-surface boundary conditions. The current method is able to predict the ventilated cavity shapes for a wide range of angles of attack and Froude numbers, and is in good agreement with existing experimental results. Through a comparison with a linearized free-surface method, the current method highlights the shortcomings of the negative image approach used commonly in two-dimensional and three-dimensional numerical methods for surface-piercing hydrofoils or propellers. The current method with all its capabilities makes it a unique contribution to improving numerical tools for the performance prediction of surface-piercing propellers. The scheme is also applied to predict the roll and heave dynamics of two-dimensional Floating Production Storage and Offloading (FPSO) vessel hull sections within a potential flow framework. The development of the potential flow model is aimed at validating the free-surface dynamics of an independently developed Navier Stokes Solver for predicting the roll characteristics of two-dimensional hull sections with bilge keels.text2012-02-15T17:45:41Z2012-02-15T17:45:41Z2009-082012-02-15electronichttp://hdl.handle.net/2152/14765engCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works. |
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English |
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Others
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Propellers Surface-piercing propellers Numerical methods Boundary Element Method Nonlinear interaction Performance prediction Free-surface Flow model Mathematical models Hull sections |
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Propellers Surface-piercing propellers Numerical methods Boundary Element Method Nonlinear interaction Performance prediction Free-surface Flow model Mathematical models Hull sections Vinayan, Vimal A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
description |
A two-dimensional Boundary Element Method (BEM) is developed to study the strongly nonlinear interaction between a surface-piercing body and the free-surface. The scheme is applied to problems with and without the possibility of ventilation resulting from the motion and geometric configuration of the surface-piercing body. The main emphasis of this research work is on the development of numerical methods to improve the performance prediction of surface-piercing propellers by including the whole range of free-surface nonlinearities. The scheme is applied to predict the ventilated cavity shapes resulting from the vertical and rotational motion of a blade-section with fully nonlinear free-surface boundary conditions. The current method is able to predict the ventilated cavity shapes for a wide range of angles of attack and Froude numbers, and is in good agreement with existing experimental results. Through a comparison with a linearized free-surface method, the current method highlights the shortcomings of the negative image approach used commonly in two-dimensional and three-dimensional numerical methods for surface-piercing hydrofoils or propellers. The current method with all its capabilities makes it a unique contribution to improving numerical tools for the performance prediction of surface-piercing propellers. The scheme is also applied to predict the roll and heave dynamics of two-dimensional Floating Production Storage and Offloading (FPSO) vessel hull sections within a potential flow framework. The development of the potential flow model is aimed at validating the free-surface dynamics of an independently developed Navier Stokes Solver for predicting the roll characteristics of two-dimensional hull sections with bilge keels. === text |
author |
Vinayan, Vimal |
author_facet |
Vinayan, Vimal |
author_sort |
Vinayan, Vimal |
title |
A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
title_short |
A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
title_full |
A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
title_fullStr |
A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
title_full_unstemmed |
A Boundary Element Method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
title_sort |
boundary element method for the strongly nonlinear analysis of ventilating water-entry and wave-body interaction problems |
publishDate |
2012 |
url |
http://hdl.handle.net/2152/14765 |
work_keys_str_mv |
AT vinayanvimal aboundaryelementmethodforthestronglynonlinearanalysisofventilatingwaterentryandwavebodyinteractionproblems AT vinayanvimal boundaryelementmethodforthestronglynonlinearanalysisofventilatingwaterentryandwavebodyinteractionproblems |
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1716822181317443584 |