Erik Rotteveel, Auke van der Ploeg; Hekkenberg, Robert
Optimization of ships in shallow water with viscous flow computations and surrogate modeling Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
@conference{Rotteveel2016,
title = {Optimization of ships in shallow water with viscous flow computations and surrogate modeling},
author = {Erik Rotteveel, Auke van der Ploeg and Robert Hekkenberg},
url = {http://www.marin.nl/web/Publications/Papers/Optimization-of-ships-in-shallow-water-with-viscous-flow-computations-and-surrogate-modeling.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID083},
abstract = {Shallow water effects change the flow around a ship significantly which can affect the optimum design of the hull. This paper describes a study into the optimization of the aft ship region for various water depths. The research focuses on variations of the following parameters of a hull form: The athwart ship’s propeller location, the tunnel top curvature, the flat-of-bottom shape in the stern region and the stern bilge radius. All hull form variants are evaluated in 3 different water depths using a viscous flow solver, and a surrogate model is created for each water depth. Pareto plots are used to present the trade-off between the optimization for one or another water depth. Finally, specific hull forms are chosen and the differences in flow behavior among hull forms and water depths are explained.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
G. Fernandes, Kapsenberg; Walree, F. van
Towards Accurate Computations of Active Stabiliser Fins, focusing on Dynamic Stall Conference
15th International Ship Stability Workshop, Stockholm, Sweden, 2016.
@conference{Fernandes2016,
title = {Towards Accurate Computations of Active Stabiliser Fins, focusing on Dynamic Stall},
author = {Fernandes, G., Kapsenberg, G.K., Kerkvliet, M. and Walree, F. van},
url = {http://www.marin.nl/web/Publications/Papers/Towards-Accurate-Computations-of-Active-Stabiliser-Fins-focusing-on-Dynamic-Stall.htm},
year = {2016},
date = {2016-06-13},
booktitle = {15th International Ship Stability Workshop, Stockholm, Sweden},
abstract = {Steps towards accurate and efficient characterisation of the hydrodynamic behaviour of active stabiliser fins have been conducted using computational fluid dynamics. Conditions seen at hydrodynamic testing facilities (Reynolds number = 135,000), with an angle of attack variation described as alpha(t) = 10 deg + 15 deg * sin(omega*t) have been modelled in two dimensions with various RANS turbulence models (k-omega SST, kskl, Spalart-Allmaras & LCTM) for reduced frequencies k=0.1 & 0.05. Solutions were compared to experimental results and results from other calculation methods (LES) and to results from a typical sea keeping code. The results showing the hysteresis loop for CL and CD show that a good agreement was seen to the literature. For seakeeping applications, moderate refinement in time and space is sufficient, and that the k-omega SST turbulence model best matches the CL and CD curves found in the literature. The increased knowledge of stabiliser fins dynamics will be used to improve time-domain seakeeping codes and possible also the control laws for active stabilizer fins},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2016
Erik Rotteveel, Auke van der Ploeg; Hekkenberg, Robert
Optimization of ships in shallow water with viscous flow computations and surrogate modeling Conference
13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark, 2016.
Abstract | Links | BibTeX | Tags: Computational fluid dynamics, Hull form optimization, inland ships, shallow water
@conference{Rotteveel2016,
title = {Optimization of ships in shallow water with viscous flow computations and surrogate modeling},
author = {Erik Rotteveel, Auke van der Ploeg and Robert Hekkenberg},
url = {http://www.marin.nl/web/Publications/Papers/Optimization-of-ships-in-shallow-water-with-viscous-flow-computations-and-surrogate-modeling.htm},
year = {2016},
date = {2016-09-04},
booktitle = {13th International Symposium on Practical Design of Ships (PRADS), Copenhagen, Denmark},
pages = {ID083},
abstract = {Shallow water effects change the flow around a ship significantly which can affect the optimum design of the hull. This paper describes a study into the optimization of the aft ship region for various water depths. The research focuses on variations of the following parameters of a hull form: The athwart ship’s propeller location, the tunnel top curvature, the flat-of-bottom shape in the stern region and the stern bilge radius. All hull form variants are evaluated in 3 different water depths using a viscous flow solver, and a surrogate model is created for each water depth. Pareto plots are used to present the trade-off between the optimization for one or another water depth. Finally, specific hull forms are chosen and the differences in flow behavior among hull forms and water depths are explained.},
keywords = {Computational fluid dynamics, Hull form optimization, inland ships, shallow water},
pubstate = {published},
tppubtype = {conference}
}
G. Fernandes, Kapsenberg; Walree, F. van
Towards Accurate Computations of Active Stabiliser Fins, focusing on Dynamic Stall Conference
15th International Ship Stability Workshop, Stockholm, Sweden, 2016.
Abstract | Links | BibTeX | Tags: Active stabiliser fins, Computational fluid dynamics, Dynamic stall, RANS turbulence models, Roll damping
@conference{Fernandes2016,
title = {Towards Accurate Computations of Active Stabiliser Fins, focusing on Dynamic Stall},
author = {Fernandes, G., Kapsenberg, G.K., Kerkvliet, M. and Walree, F. van},
url = {http://www.marin.nl/web/Publications/Papers/Towards-Accurate-Computations-of-Active-Stabiliser-Fins-focusing-on-Dynamic-Stall.htm},
year = {2016},
date = {2016-06-13},
booktitle = {15th International Ship Stability Workshop, Stockholm, Sweden},
abstract = {Steps towards accurate and efficient characterisation of the hydrodynamic behaviour of active stabiliser fins have been conducted using computational fluid dynamics. Conditions seen at hydrodynamic testing facilities (Reynolds number = 135,000), with an angle of attack variation described as alpha(t) = 10 deg + 15 deg * sin(omega*t) have been modelled in two dimensions with various RANS turbulence models (k-omega SST, kskl, Spalart-Allmaras & LCTM) for reduced frequencies k=0.1 & 0.05. Solutions were compared to experimental results and results from other calculation methods (LES) and to results from a typical sea keeping code. The results showing the hysteresis loop for CL and CD show that a good agreement was seen to the literature. For seakeeping applications, moderate refinement in time and space is sufficient, and that the k-omega SST turbulence model best matches the CL and CD curves found in the literature. The increased knowledge of stabiliser fins dynamics will be used to improve time-domain seakeeping codes and possible also the control laws for active stabilizer fins},
keywords = {Active stabiliser fins, Computational fluid dynamics, Dynamic stall, RANS turbulence models, Roll damping},
pubstate = {published},
tppubtype = {conference}
}