Bulten, NorbertNorbertBulten2024-04-112024-04-112024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46461The Gate-Rudder concept is one of the ideas which is investigated in the EU-project CHEK to reduce the vessel emissions. The research in this project is based on fullscale CFD simulations of a bulker vessel. The conventional scope has been extended with vessel-drift and rudder-steering actions, which are expected to occur when the CHEK bulker is equipped with wind-assisted propulsion. The CFD results for vessel drift and rudder angles have revealed interesting findings when the rudder performance is compared to conventional rudders. To cover a larger range of vessel operating conditions a dynamic system simulation model is created, based on the CFD dataset. This model gives the vessel operating condition (RPM, vessel drift and rudder angle) for given vessel speed and external force. The published MMG method has been adapted to implement the specific behavior of the Gate-Rudder. With the adjusted method comparisons can be made between the reference case and the Gate-Rudder concept. It has been found that the performance of the Gate-Rudder is especially good in case of some disturbances like drift and rudder angle, which is regarded to be typical for CII performance. Therefore, the use of the straight-sailing, calm water condition as representative vessel operating condition must be reconsidered.enhttp://rightsstatements.org/vocab/InC/1.0/Gate-RudderpropulsionCFDCHEKCIIEngineering and Applied OperationsConference Paper10.15480/882.932410.15480/882.932410.15480/882.9294Conference Paper