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Sailing in waves: A numerical method for analysis of seakeeping performance and dynamic behavior of a wind powered ship
RISE Research Institutes of Sweden, Safety and Transport, Maritime department. (SSPA)ORCID iD: 0009-0009-0240-9268
RISE Research Institutes of Sweden, Safety and Transport, Maritime department. (SSPA)ORCID iD: 0000-0003-1035-709X
RISE Research Institutes of Sweden, Safety and Transport, Maritime department. (SSPA)ORCID iD: 0000-0002-6266-2320
2022 (English)In: SNAME 24th Chesapeake Sailing Yacht Symposium, CSYS 2022, Society of Naval Architects and Marine Engineers , 2022Conference paper, Published paper (Refereed)
Abstract [en]

Before the background of the internationl Maritime Organization's 2050 emission reducation targets, the largest sailing ship in the world is currently being developed in Sweden. This wind powered car carrier, called Oceanbird, will have four 80-metre-high wing sails targeting CO2savings in the order of 90%. The prediction and analysis of the seakeeping performance of such a ship is of importance, not only in terms of sailing dynamics, but also when it comes to the structural design of the rig. To this end, a numerical method for predicting a ship's motions and loads on its rigid wing sails is described in this paper and a demonstration of how the method can be used to obtain such loads is presented. The numerical method is based on an unsteady 3D fully nonlinear potential flow hydrodynamic model coupled with a hybrid 2D RANS/3D lifting-line aerodynamic model. Simulations in a seaway with short-crested irregular waves and corresponding wind conditions are conducted, resulting in time histories of the aerodynamic and inertial forces acting on the rig. Possible applications of the method include fatigue analysis of the wing sails, where the accumulated fatigue damage over the lifespan of the rig structure depends on the sum of aerodynamic forces and motion induced inertial forces. Other potential applications include sail dynamics, parametric roll, sheeting strategies and appendage configuration studies. 

Place, publisher, year, edition, pages
Society of Naval Architects and Marine Engineers , 2022.
Keywords [en]
Fatigue of materials, Seakeeping, Structural design, Vehicle performance, Yachts, Aerodynamic forces, Car carriers, Dynamic behaviors, Flow hydrodynamics, Fully nonlinear potential flow, Inertial forces, Prediction and analysis, Seakeeping performance, Ship motion, Wing sail, Numerical methods
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ri:diva-60425DOI: 10.5957/CSYS-2022-013Scopus ID: 2-s2.0-85133681136OAI: oai:DiVA.org:ri-60425DiVA, id: diva2:1704991
Conference
SNAME 24th Chesapeake Sailing Yacht Symposium, CSYS 2022, 10 June 2022 through 11 June 2022
Note

Funding details: TRV 2018/96451; Funding text 1: This work was financially supported by Wallenius Marine and the Swedish Transport Agency under grant number TRV 2018/96451 (Vinddrivet biltransportfartyg).; Funding text 2: This work was financially supported by Wallenius Marine and the Swedish Transport Agency undergrantnumberTRV2018/96451(Vinddrivetbiltransportfartyg).

Available from: 2022-10-20 Created: 2022-10-20 Last updated: 2023-12-04Bibliographically approved

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Kjellberg, MartinGerhardt, FrederikWerner, Sofia

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