Mueller Prado Sampaio, ClaudioClaudioMueller Prado SampaioNishimoto, KazuoKazuoNishimotoRuggeri, FelipeFelipeRuggeriLopes Pinto, MarianaMarianaLopes PintoPritzelwitz, Philip vonPhilip vonPritzelwitz2024-04-172024-04-172024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46452The application of a five in-line rotor sails system for reducing the ship’s fuel consumption and, therefore, emissions was studied for a large 325,000 DWT ore carrier. The study was carried out through simulations based on Computational Fluid Dynamics (CFD), where the detailed ore carrier and rotor sails geometry were simulated and analyzed under different apparent/relative wind conditions, rotational speeds and loading conditions (laden/ballast). The simulations were carried out for a 40-years hind-cast analysis of the wind pattern along the route, with an optimization algorithm developed to obtain the optimum rotational speed for the rotor sails under each incident flow condition. A careful evaluation of the balance between produced thrust and net required power was undertaken including the wind pattern along the route as well as several other parameters as the ship’s speed, loading condition and interference among structures. Additionally, the wake interference among the set of rotor sails was also considered, as the performance depends on the true composed incident wind field. As a result, the thrust produced by each device as well as the contribution of other structures were estimated. The net power gains of the arrangement were calculated as the cumulative probabilities of the different power gain levels showing that the final performance strongly depends on the wind pattern along the route.enhttp://rightsstatements.org/vocab/InC/1.0/CFD simulationrotor sailshind-cast wind patternnet performance optimizationEngineering and Applied OperationsConference Paper10.15480/882.931610.15480/882.931610.15480/882.9294Conference Paper