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Prediction of rotor sails performance on large ore carriers
Citation Link: https://doi.org/10.15480/882.9316
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
University of São Paulo, São Paulo, Brazil
University of São Paulo, São Paulo, Brazil
Argonautica Engineering & Research, São Paulo, Brazil
Vale Institute of Technology (ITV), Ouro Preto, Brazil
Vale Institute of Technology (ITV), Ouro Preto, Brazil
TORE-DOI
Start Page
709
End Page
717
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
The 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.
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.
Subjects
CFD simulation
rotor sails
hind-cast wind pattern
net performance optimization
DDC Class
620: Engineering
Publication version
publishedVersion
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MuellerPradoSampaio-PredictionOfRotorSailsPerformanceOnLargeOreCarrier-1128-1-final.pdf
Type
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Size
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Format
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