Stability analysis and prediction of performance for a hydrofoil sailing boat

Masuyama, Yutaka

doi:10.3233/isp-1987-3439801

Cited by 6 publications

(4 citation statements)

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“…The contribution of these expensive stability derivatives to the eigenmodes of the stability matrix can however not be understated. This hypothesis was supported by the numerical stability derivatives as provided by Masuyama (Masuyama, 1987) and later also confirmed by the stability analysis of the Viper. That is why the terms with (*) and (**) will be approximated using the other 9 steadystate force derivatives.…”

Section: Derivativessupporting

confidence: 54%

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Dynamic Stability Analysis of a Hydrofoiling Sailing Boat using CFD

Bagué

Degroote

Demeester

et al. 2021

Journal of Sailing Technology

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Abstract. This paper describes the study of the dynamic stability of a hydrofoiling sailing boat called the “Goodall Design Foiling Viper”. The goal of Goodall Design is to make hydrofoiling accessible to a wider public, whereas it was previously reserved for professional sailors at the highest level of the sport. To allow for safe operation, stability is an essential characteristic of the boat. The aim of this work is to find a strategy to perform a dynamic stability analysis using computational fluid dynamics (CFD), which can be used in a preliminary design stage. This paper starts by establishing a theoretical framework to perform the dynamic stability analysis. A stability analysis has to be performed around an equilibrium state which depends on operating parameters such as speed, centre of gravity, etc. . A fluid-structure interaction strategy is applied to determine these equilibrium states. The last part discusses the stability characteristics of the Viper. The framework managed to assess the dynamic stability of the Viper and found 5 longitudinal eigenmodes: two complex conjugated pairs of eigenvalues and one real eigenvalue. It can be concluded that the boat was both statically and dynamically stable.

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Section: Derivativessupporting

confidence: 54%

“…This theory is described in many works, such as Drela's work on "Flight Vehicle Aerodynamics" (Drela, 2014). An example of a dynamic stability analysis specifically for hydrofoil boats is the work by Masuyama (1987). The comparison of the dynamic stability analysis in aeroplanes and in hydrofoil vessels is discussed by Heppel (2015).…”

Section: Stability Dynamicsmentioning

confidence: 99%

Dynamic Stability Analysis of a Hydrofoiling Sailing Boat using CFD

Bagué

Degroote

Demeester

et al. 2021

Journal of Sailing Technology

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“…As proposed by Masuyana [33], the hydrofoil works in the same way as an aeroplane wing, with one exception: it is immersed. The established principles from the aircraft may be employed in the watercraft design.…”

Section: The Structural Problemmentioning

confidence: 97%

Multidisciplinary optimization of a catamaran's hydrofoil design with dynamic response surface and distributive processing

Tancredi

Augusto

Bennis

2009

Proceedings of the Institution of Mechanical Engineers, Part M:

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This paper presents a rational approach to the design of a catamaran's hydrofoil applied within a modern context of multidisciplinary optimization. The approach used includes the use of response surfaces represented by neural networks and a distributed programming environment that increases the optimization speed. A rational approach to the problem simplifies the complex optimization model; when combined with the distributed dynamic training used for the response surfaces, this model increases the efficiency of the process. The results achieved using this approach have justified this publication.

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“…This understanding is necessary to optimise the dynamic stability of these vessels and provide the necessary safety. Masuyama [4] description of the motions of a vessel can overestimate its top speed by quite some margin. The top speed of a vessel is often based on static calculations where dynamic effects are not taken into account and even though a certain state can produce a theoretical top speed does not mean this state is dynamically stable and therefor achievable in reality.…”

Section: Introductionmentioning

confidence: 99%

Typhoon: A vortex-lattice code for assessing dynamic stability characteristics of hydrofoil crafts

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Degroote

Demeester

et al. 2021

ISP

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In this paper an open-source implementation of the vortex-lattice method to perform a dynamic stability analysis for hydrofoil crafts is discussed. The difference with existing vortex-lattice codes is the addition of a free-surface boundary condition which is needed to analyse surface piercing foils. This code, called Typhoon, can be used to perform a dynamic stability analysis (DSA) on hydrofoil vessels. The goal of this code is to have an easy-to-use and cheap alternative to compare different designs in early design stages. This paper gives a brief background to all the concepts used, followed by a short theoretical explanation of the vortex-lattice method. The second part of this paper focuses on a practical example of how this code can be used on an example.

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Stability analysis and prediction of performance for a hydrofoil sailing boat

Cited by 6 publications

References 0 publications

Dynamic Stability Analysis of a Hydrofoiling Sailing Boat using CFD

Dynamic Stability Analysis of a Hydrofoiling Sailing Boat using CFD

Multidisciplinary optimization of a catamaran's hydrofoil design with dynamic response surface and distributive processing

Typhoon: A vortex-lattice code for assessing dynamic stability characteristics of hydrofoil crafts

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