Numerical simulation for twin-propeller ship maneuvering motion considering hydrodynamic performance of propeller

Aiming at the problems that the real-propeller method has low computation efficiency in simulating the rotation of propeller and the complexity of the wake field of the twin-propeller ship，while the body force propeller method usually does not consider the influence of wake non-uniformity on the propeller hydrodynamics performance under the maneuvering motion condition，by using RANS method，overset grid technology and body force propeller method，the DTMB5415M was taken as the research object，and the numerical simulations for a twin-propeller ship maneuvering motion were carried out．First，the captive model test numerical simulations for DTMB5415M were carried out to obtain the hydrodynamic forces of the propeller under the maneuvering motion condition． Thus，the modified body force propeller model under maneuvering motion condition was established．Then，the modified body force propeller model and original body force propeller model were used for the numerical simulations of DTMB5415M maneuvering motion，respectively． Results show that the modified body force propeller model considers the influence of wake non-uniformity on the lateral force and thrust of the real propeller compared with the original body force propeller model，so the numerical simulations for ship maneuvering motion can be carried out more accurately and quickly. © 2023 Huazhong University of Science and Technology. All rights reserved.