Steady sailing performance of a hybrid-sail assisted bulk carrier

Fujiwara, Toshifumi; Hearn, Grant E.; Kitamura, Fumitoshi; Ueno, Michio; Minami, Yoshimasa

doi:10.1007/s00773-004-0189-3

Cited by 21 publications

(8 citation statements)

References 3 publications

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“…In the beginning, the traditional vessel has a non-symmetrical arc-shaped sail with soft sail material. Indeed, this profile has good aerodynamic performance [8,9]. However, a previous study explained that the rigid sail has a higher lift coefficient than the soft sail [7].…”

Section: Literature Review 1technology Of Wing-sailmentioning

confidence: 87%

“…In general, a ship should have satisfactory stability while sailing. It is essential that the modern wind-assisted ship should not have a significant influence on its stability in windy condition [9]. Therefore, after analyzing the performance of the wing-sail installed on the tanker, the ship's intact stability must be re-calculated and re-checked for the given criteria.…”

Section: Ship Stability Analysismentioning

confidence: 99%

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Impact of Wind-Assisted Technologies on Resistance and Stability of Commercial Ship

Haripriyono

Ahmed

Hannan

2021

CFDL

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The use of fossil fuels on commercial ships significantly contributes to the increase of carbon dioxide emission, and adaptation of renewable energy can help control that emission efficiently. Historically, the extraction of wind energy is found to be the best renewable energy solution for commercial ships; and recently, with renewed interest in this area, various wind energy extraction devices are proposed in the literature. This study investigates the effectiveness of one such technology, wing-sail, on a tanker ship. The NACA 4412 series is adopted to design the sail in this regard, and a fowler flap is added to aid the sail in low wind speed. ANSYS Fluent is used to carry out this CFD simulation-based study. The effects of onboard wing-sails under various apparent wind angles, wind speeds, and wing-sail orientations have been examined. The impact of wing-sail on the stability of the ship is also analyzed. It is concluded that the ship can save fuel and reduce carbon dioxide emissions by 1.8% to 2.4% while using the wing-sail with the aid of a fowler flap. Also, this combination of wing-sail with the fowler flap is found to be the best in providing extra thrust for commercial ships without significantly sacrificing its stability.

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Section: Literature Review 1technology Of Wing-sailmentioning

confidence: 87%

Section: Ship Stability Analysismentioning

confidence: 99%

Impact of Wind-Assisted Technologies on Resistance and Stability of Commercial Ship

Haripriyono

Ahmed

Hannan

2021

CFDL

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“…The testing sail model's geometric size is as shown in Tab. 4. and the sail model is as shown in Fig.…”

Section: Wind Tunnel Testmentioning

confidence: 99%

“…By literatures [2,3,4,5,6], researches of sail for motor ships in recent years mainly focus on sail model selection and the interaction between sail and ship, including design, optimization of model and aerodynamic analysis of sails of different structures and materials, routing plan and economic performance forecast, computation analysis of sail structure strength and its influences on ship stability, and interaction between sail and ship and between sails. The core of all these researches is to develop an accurate recognition of sail's aerodynamic performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Aerodynamics of Sail in Natural Wind

Zeng

Zhang

2018

Polish Maritime Research

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In order to evaluate the impacts of a motor vessel after installing wind sails, the aerodynamics of the sail should be accurately calculated. However most of the research on sails are based on stable wind instead of natural wind which is changing horizontally and vertically. In this paper wind tunnel tests are carried out based on stable wind field and simulated natural wind field, the results shown that there are 16–44% decrease in natural wind in terms of lifting coefficient and 11–42% decrease for drag coefficient. This would provide a valuable reference to the effectiveness evaluation of the impact of sails for sail assisted ships.

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“…(1998), Hansen et al (2006), Schneider et al (2003), Miyata et al (1997)). Concerning sails aerodynamics, many studies have been made using CFD (Miyata and Lee (1999), Thrasher et al (2001)) and model scale experiments in wind tunnels (Fossati et al (2008(Fossati et al ( , 2006, Le Pelley and Modral (2008), Fujiwara et al (2005)) but fewer studies have been devoted to full scale trials in real navigation conditions (Clauss and Heisen (2006), Masuyama et al (2009), Viola and Flay (2010a,b)). Recently, several authors have focused their interest on the Fluid Structure Interaction (FSI) problem to address the issue of the impact of the structural deformation on the flow and hence the aerodynamic forces generated (Chapin and Heppel (2010), Renzsh and Graf (2010)).…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of unsteady models for fluid structure interaction: Application to yacht sails and rigs

Augier

Bot

Hauville

et al. 2012

Journal of Wind Engineering and Industrial Aerodynamics

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This work presents a full scale experimental study on the aero-elastic wind/sails/rig interaction in real navigation conditions with the aim to give an experimental validation of unsteady Fluid Structure Interaction (FSI) models applied to yacht sails. An inboard instrumentation system has been developed on a J80 yacht to simultaneously and dynamically measure the navigation parameters, yacht's motion, and sails flying shape and loads in the standing and running rigging. The first results recorded while sailing upwind in head waves are shown. Variations of the measured parameters are characterized and related to the yacht motion (trim mainly). Correlations between the different parameters are examined. In the system's response to the dynamic forcing (pitching motion) we attempt to distinguish between the aerodynamic effect of varying apparent wind induced by the motion and the structural effect of varying stresses and strains due to the motion and inertia. The dynamic full scale measurements presented underline the necessity of considering the unsteadiness of phenomena to correctly simulate a yacht's behavior in actual sailing conditions. The simulation results from the FSI model compare very well with the experimental data for steady sailing conditions. For the unsteady conditions obtained in head waves, the first results show a good agreement between measurements and simulation.

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Steady sailing performance of a hybrid-sail assisted bulk carrier

Cited by 21 publications

References 3 publications

Impact of Wind-Assisted Technologies on Resistance and Stability of Commercial Ship

Impact of Wind-Assisted Technologies on Resistance and Stability of Commercial Ship

Experimental Study of the Aerodynamics of Sail in Natural Wind

Experimental validation of unsteady models for fluid structure interaction: Application to yacht sails and rigs

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