Estimation of hydrodynamic derivatives of an appended KCS model in open and restricted waters

Abstract

The paper studies and compares the manoeuvring capabilities of an appended KRISO Container Ship (KCS) hull model in both open and restricted waters. The KCS hull model with a static rudder and body force model-based propeller is simulated using the open-source computational fluid dynamics toolkit OpenFOAM. Initially, open water simulations are performed for the propeller model to replicate experimental open water curves and estimate parameters for the body force model. Next static drift, pure sway, and pure yaw simulations are performed using both overset and static mesh, from which hydrodynamic derivatives are calculated. Next, restricted water simulations are performed using overset mesh for the ship in a channel with defined width and depth. Finally, manoeuvring derivatives are predicted for restricted waters and compared against the open water values. The study concludes that consideration of appendages notably influences the manoeuvring study outcome, and the ship experiences notably larger forces during manoeuvring in restricted water and the manoeuvring capabilities are also notably compromised.