JEMS Maritime Sci. Ahead of Print: JEMS-26097

Performance analysis of interacting rigid wind sails and rotor sails by kriging surrogate model

Takumi Endo¹, Cem Guzelbulut^2
1Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
²Deparment of Mechanical Engineering, Kahramanmaras Istiklal University, Kahramanmaras, Turkey

Increasing global CO2 emissions lead all industries including maritime industry to adapt environmentally friendly solutions. Using wind energy, introducing alternative fuels, building carbon capture and storage systems and improving the operation by route optimization and voyage speed control are some of the attempts for this purpose. In the present study, an investigation of the efficiency of implementing one rigid wind sail and one rotor sail was conducted to use both systems at maximum level. A case study was planned to understand how much interaction between sails play a role and how to use multiple sailing systems considering the interaction model. A Kriging surrogate model was created to model interaction between sails, and the maximum prediction error was found to be 8% in the lift coefficient prediction of rotor sail. Then, ship dynamics model, known as Maneuvering Modeling Group (MMG) model, was built. It was found that interaction significantly affects the performance of sails, approximately 4%, and using surrogate model-informed controller contributes around 1% more than that of independent controller to the reduction of power required to maintain ship speed.

Keywords: rigid wind sail, rotor sail, wind-assisted ship propulsion, kriging surrogate model

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