Hydrofoil Design and Optimization for Fast Ships.

Besnard, Eric; Schmitz, Adeline; Tzong, George; Kaups, Kalle; Hefazi, Hamid

doi:10.21236/ada338264

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…For this reason, several options for each tool were considered and the following set of tools was selected:  CAD software: Pro-Engineer (Parametric Technology Corporation, 2009)  Grid generation software: ICEM CFD (ANSYS, Inc., 2009)  CFD software: CSULB-developed interactive boundary layer (IBL) approach with free surface modeled by negative images (Besnard, 1998, andHefazi et al, 2002)  Optimization software: iSIGHT (Dassault Systèmes SIMULIA, 2009) Pro-Engineer and ICEM CFD were selected because of the existence of a module which does allow for automatic data transfer between the CAD and grid generation package. The IBL approach was chosen because at high Reynolds numbers and low angles of attack, it is a very accurate and efficient approach.…”

Section: Modiied Cascade Correlation Neural Network and Its Applicatimentioning

confidence: 99%

Modified Cascade Correlation Neural Network and its Applications to Multidisciplinary Analysis Design and Optimization in Ship Design

Schmitz¹,

Courouble²,

Hefazi³

et al. 2010

Machine Learning

Self Cite

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Section: Modiied Cascade Correlation Neural Network and Its Applicatimentioning

confidence: 99%

Modified Cascade Correlation Neural Network and its Applications to Multidisciplinary Analysis Design and Optimization in Ship Design

Schmitz¹,

Courouble²,

Hefazi³

et al. 2010

Machine Learning

Self Cite

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“…In addition, to reduce the resistance experienced by the ship significantly, it can be carried out by installing hydrofoil [21], and by using stern flaps [22]. The hydrofoil is an instrument designed to produce the lift force so that the fluid force on the hull is small [23]. In 1992, Peter Van Oossanen invented a hydrofoil mounted behind the transom and proved to be able to reduce ship resistance, this hydrofoil was named Hull vane [24].…”

Section: Introductionmentioning

confidence: 99%

Study Reduction of Resistance on The Flat Hull Ship of The Semi-Trimaran Model: Hull Vane Vs Stern Foil

Nabawi

Syahril

Primawati

2021

CFDL

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Flat hull ships is appraised for its superiority due to the manufacturing simplicity and lower investment costs, yet the ship has its own weakness for it requires a greater resistance. As a matter of fact, a significant reduction on the resistance can be done with foil installation but it is necessary to study the optimal position of the foil installation. This study is aimed at revealing the effectiveness of the Hull Vane and Stern Foil installation in reducing the resistance experienced by the flat hull ship of the semi-trimaran model. The research was conducted by comparing the resistance experienced by the flat hull ship of the semi-trimaran model without foil, Hull vane and Stern foil installations. In addition, the disclosure of resistance experienced by each ship model was carried out by using CFD simulation. The simulation results revealed that the installation of the Hull vane and Stern foil was able to reduce the resistance experienced by the flat hull ship of the semi-trimaran model. The largest reduction occurred in Froude number 1.1, where the Hull vane installation was able to reduce resistance by 12.44% and on the ship model with Stern foil installation the resistance reduction was 5.25%. Based on the results of this CFD simulation, it can be concluded that the Hull Vane installation is more optimal in reducing resistance on the flat hull ship of the semi-trimaran model.

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“…The literature offers several references to hydrofoils application for fast mono and multi hull crafts (Besnard, et al, 1998;Prastowo, et al, 2016;Kandasamy, et al, 2011). An historical review of their application on several types of fast crafts, together with an experimental report of the advantages in several sailing conditions, is reported in (Migeotte, 2002).…”

Section: Introductionmentioning

confidence: 99%

Combining Analytical Models and Mesh Morphing Based Optimization Techniques for the Design of Flying Multihulls Appendages

Cella

Groth

Porziani

et al. 2021

Journal of Sailing Technology

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The fluid dynamic design of hydrofoils involves most of the typical difficulties of aeronautical wings design with additional complexities related to the design of a device operating in a multiphase environment. For this reason, “high fidelity” analysis solvers should be, in general, adopted also in the preliminary design phase. In the case of modern fast foiling sailing yachts, the appendages accomplish both the task of lifting up the boat and to make possible upwind sailing by contributing balance to the sail side force and the heeling moment. Furthermore, their operative design conditions derive from the global equilibrium of forces and moments acting on the system which might vary in a very wide range of values. The result is a design problem defined by a large number of variables operating in a wide design space. In this scenario, the device performing in all conditions has to be identified as a trade-off among several conflicting requirements. One of the most efficient approaches to such a design challenge is to combine multi-objective optimization strategies with experienced aerodynamic design. This paper presents a numerical optimization procedure suitable for foiling multihulls. As a proof of concept, it reports, as an application, the foils design of an A-Class catamaran. The key point of the method is the combination of opportunely developed analytical models of the hull forces with high fidelity multiphase analyses in both upwind and downwind sailing conditions. The analytical formulations were tuned against a database of multiphase analyses of a reference demihull at several attitudes and displacements. An aspect that significantly contributes to both efficiency and robustness of the method is the approach adopted to the geometric parametrization of the foils which was implemented by a mesh morphing technique based on Radial Basis Functions.

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Hydrofoil Design and Optimization for Fast Ships.

Cited by 7 publications

References 4 publications

Modified Cascade Correlation Neural Network and its Applications to Multidisciplinary Analysis Design and Optimization in Ship Design

Modified Cascade Correlation Neural Network and its Applications to Multidisciplinary Analysis Design and Optimization in Ship Design

Study Reduction of Resistance on The Flat Hull Ship of The Semi-Trimaran Model: Hull Vane Vs Stern Foil

Combining Analytical Models and Mesh Morphing Based Optimization Techniques for the Design of Flying Multihulls Appendages

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