Session: 06-15-01 Unsteady Hydrodynamics, Vibrations, Acoustics and Propulsion - I

Submission Number: 181178

Numerical Investigation of the Emergency Stopping Maneuver of the Kriso Container Ship 

Six-degree-of-freedom (DoF) Unsteady-Reynolds-Averaged-Navier-Stokes (URANS) simulations are conducted to evaluate the emergency stopping performance of the KRISO Container Ship (KCS) fitted with a semi-balanced horn rudder and a right-handed five-blade fixed pitch propeller in calm water using the StarCCM+ CFD solver. The free-running stopping maneuvers are conducted for the Harbor Maneuvering Speed (HMS), Cursing Speed (CS), and the Maximum Design Speed (MDS) conditions with different propeller RPM deceleration rates. Proportional-Integral-Differential (PID) controllers are used during the approach phase of the maneuver to estimate the propeller RPM at the self-propulsion points and the neutral rudder angles, and are validated against experiments. The KCS hull and rudder are meshed as separate overset domains to ensure the mesh quality during the relative and/or large motion of bodies during the execution of the maneuver.  A fully discretized rotating propeller mesh using the sliding interface approach has been used to capture the transient propeller-induced forces and the hull-propeller-rudder interactions during the maneuver. A parametric study using International Towing Tank Conference (IITC) recommended characteristic variables such as the stopping time, lateral deviation, and trach reach, along with time histories of the trajectory, forces, and moments associated with the transient maneuvers, is presented and compared with available model test results.  

Presenting Author: Adwaith Nath Memorial University of Newfoundland

Presenting Author Biography: Adwaith Nath is a PhD Student focusing on the numerical and experimental investigation of maneuvering of ship in waves at the Advanced Marine Hydrodynamics Laboratory in the Memorial University of Newfoundland. Adwaith Nath is a graduate from the EMShip Erasmus + program in Advanced Ship Design from the University of Liege, Belgium with a specialization in Hydrodynamics for Ocean Engineering from Ecole Centrale the Nantes, France.

Authors:

Adwaith Nath Memorial University of Newfoundland
Heather Peng Memorial University of Newfoundland
Ayhan Akinturk National Research Council Canada
Wei Qiu Memorial University of Newfoundland