Active flow control of the airflow of a ship at yaw
Artikel i vetenskaplig tidskrift, 2023

This paper implements the steady Coanda effect active flow control (AFC) on the Chalmers ship model (CSM) to study its influence on the ship's side force and airwake under the yaw effect. The study is conducted numerically using Large Eddy Simulation (LES) with Wall-Adapting Local-Eddy Viscosity (WALE) model. Numerical methods are validated by the experimental data acquired from the baseline CSM under 10∘ port-side wind. The model with AFC is created by modifying the square-shaped hanger base to the Coanda surface and added with injection slots along the base's roof edge and two side edges. The results show that the base-shape modification significantly alters the vortex structure on deck from z-direction vortex (ZV) to streamwise vortex (SV), and the steady Coanda effect with a momentum coefficient (Cμ) of 0.02 further enhances the SV with the removal of port-side vortex (PV). The side force and yaw moment are reduced by 5.27% and 7.97%, respectively in the AFC case due to the reduction of port-side (windward) ship-surface pressure. Furthermore, the current AFC can suppress the low-speed region and alleviate the velocity gradient in the lateral direction, which mitigates the regions of high TKE (turbulent kinetic energy) and high shear stress along the port-side deck.

Wake flow


Large eddy simulation (LES)

Yaw effect

Active flow control (AFC)


Kewei Xu

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Xinchao Su

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Rickard Bensow

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Sinisa Krajnovic

Chalmers, Mekanik och maritima vetenskaper

Ocean Engineering

0029-8018 (ISSN)

Vol. 273 113961

Aktiv strömningskontroll genom maskininlärning för minskad energiförbrukning hos fartyg

Chalmers styrkeområde Transport, 2021-11-01 -- 2023-10-31.


Teknisk mekanik


Strömningsmekanik och akustik



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